Add a HsExplicitFlag to SpliceDecl, to improve Trac #4042
[ghc-hetmet.git] / configure.ac
index cf21e39..51b04d6 100644 (file)
@@ -3,30 +3,59 @@ dnl (run "grep '^dnl \*' configure.ac | sed -e 's/dnl / /g; s/\*\*/   +/g;'"
 dnl  (or some such) to see the outline of this file)
 dnl
 #
-# (c) The AQUA Project, Glasgow University, 1994-1998
+# (c) The University of Glasgow 1994-2004
 #
-# Configure script template for the Glasgow functional programming tools
+# Configure script template for GHC
 #
-# Process with 'autoconf' to get a working configure script.
+# Process with 'autoreconf' to get a working configure script.
 #
 # For the generated configure script, do "./configure --help" to
 # see what flags are available. (Better yet, read the documentation!)
 #
 
+AC_INIT([The Glorious Glasgow Haskell Compilation System], [6.13], [glasgow-haskell-bugs@haskell.org], [ghc])
+
+# Set this to YES for a released version, otherwise NO
+: ${RELEASE=NO}
+
+# The primary version (e.g. 6.7, 6.6.1) is set in the AC_INIT line
+# above.  If this is not a released version, then we will append the
+# date to the version number (e.g. 6.7.20070204).  The date is
+# constructed by finding the date of the most recent patch in the
+# darcs repository.  If this is a source distribution (not a darcs
+# checkout), then we ship a file 'VERSION' containing the full version
+# when the source distribution was created.
+
+if test ! -f mk/config.h.in; then
+   echo "mk/config.h.in doesn't exist: perhaps you haven't run 'sh boot'?"
+   exit 1
+fi
+
+AC_SUBST([CONFIGURE_ARGS], [$ac_configure_args])
+
+dnl ----------------------------------------------------------
+dnl ** Find unixy sort and find commands, 
+dnl ** which are needed by FP_SETUP_PROJECT_VERSION
+
+dnl ** Find find command (for Win32's benefit)
+FP_PROG_FIND
+
+dnl ** Find sort command (for the benefit of Win32 environs)
+FP_PROG_SORT
+
+dnl ----------------------------------------------------------
+FP_SETUP_PROJECT_VERSION
+
+# Hmmm, we fix the RPM release number to 1 here... Is this convenient?
+AC_SUBST([release], [1])
+
 # First off, a distrib sanity check..
-AC_INIT(mk/config.mk.in)
+AC_CONFIG_SRCDIR([mk/config.mk.in])
 
 dnl * We require autoconf version 2.52
 dnl We need 2.50 due to the use of AC_SYS_LARGEFILE and AC_MSG_NOTICE.
 dnl We need 2.52 due to the use of AS_TR_CPP and AS_TR_SH.
-AC_PREREQ(2.52)
-
-dnl * Declare subdirectories that have a private configure script
-dnl
-dnl After the toplevel configuration is complete, the script will recurse into
-dnl these subdirectories if they exist. The use of a cache file makes repeated
-dnl checks cheap.
-AC_CONFIG_SUBDIRS([ghc libraries])
+AC_PREREQ([2.52])
 
 # -------------------------------------------------------------------------
 # Prepare to generate the following header files
@@ -40,451 +69,318 @@ if test x"$srcdir" != 'x.' ; then
     exit 1
 fi
 
+dnl --------------------------------------------------------------
+dnl * Project specific configuration options
+dnl --------------------------------------------------------------
+dnl What follows is a bunch of options that can either be configured
+dnl through command line options to the configure script or by
+dnl supplying defns in the build tree's mk/build.mk. Having the option to
+dnl use either is considered a Feature.
+
+dnl ** What command to use to compile compiler sources ?
+dnl --------------------------------------------------------------
+
+AC_ARG_WITH([ghc],
+[AC_HELP_STRING([--with-ghc=ARG],
+  [Use ARG as the path to GHC  [default=autodetect]])],
+  [WithGhc="$withval"],
+  [if test "$GHC" = ""; then
+    AC_PATH_PROG([GHC], [ghc])
+  fi
+  WithGhc="$GHC"])
+
+dnl ** Booting from .hc files?
+dnl --------------------------------------------------------------
+AC_ARG_ENABLE(hc-boot,
+[AC_HELP_STRING([--enable-hc-boot],
+[Boot the Glasgow Haskell Compiler from intermediate .hc files.
+ (This option is mostly of interest to porters.) [default=no]])],
+[ if test x"$enableval" = x"yes"; then
+        BootingFromHc=YES
+  else
+        BootingFromHc=NO
+  fi
+],
+[BootingFromHc=NO]
+)
+AC_SUBST(BootingFromHc)
+
+AC_ARG_ENABLE(bootstrap-with-devel-snapshot,
+[AC_HELP_STRING([--enable-bootstrap-with-devel-snapshot],
+                [Allow bootstrapping using a development snapshot of GHC.  This is not guaranteed to work.])],
+        EnableBootstrapWithDevelSnaphost=YES,
+        EnableBootstrapWithDevelSnaphost=NO
+)
+
+if test "$WithGhc" != ""; then
+  FPTOOLS_GHC_VERSION([GhcVersion], [GhcMajVersion], [GhcMinVersion], [GhcPatchLevel])dnl
+
+  if test "$GhcMajVersion" = "unknown" -o "$GhcMinVersion" = "unknown"; then
+     AC_MSG_ERROR([Cannot determine the version of $WithGhc.  Is it really GHC?])
+  fi
+
+  AC_SUBST(GhcVersion)dnl
+  AC_SUBST(GhcMajVersion)dnl
+  AC_SUBST(GhcMinVersion)dnl
+  AC_SUBST(GhcPatchLevel)dnl
+  GhcMinVersion2=`echo "$GhcMinVersion" | sed 's/^\\(.\\)$/0\\1/'`
+  GhcCanonVersion="$GhcMajVersion$GhcMinVersion2"
+  FP_COMPARE_VERSIONS($GhcVersion,[-ge],[6.10.2],
+                      [ghc_ge_6102=YES], [ghc_ge_6102=NO])
+  if test $GhcCanonVersion -ge 611; then ghc_ge_611=YES; else ghc_ge_611=NO; fi
+  if test $GhcCanonVersion -ge 613; then ghc_ge_613=YES; else ghc_ge_613=NO; fi
+  AC_SUBST(ghc_ge_6102)dnl
+  AC_SUBST(ghc_ge_611)dnl
+  AC_SUBST(ghc_ge_613)dnl
+fi
+
+dnl ** Must have GHC to build GHC, unless --enable-hc-boot is on
+if test "$BootingFromHc" = "NO" -a -d "$srcdir/compiler"; then
+  if test "$WithGhc" = ""; then
+     AC_MSG_ERROR([GHC is required unless bootstrapping from .hc files.])
+  fi
+  FP_COMPARE_VERSIONS([$GhcVersion],[-lt],[6.10],
+    [AC_MSG_ERROR([GHC version 6.10 or later is required to compile GHC.])])dnl
+
+  if test `expr $GhcMinVersion % 2` = "1"; then
+     if test "$EnableBootstrapWithDevelSnaphost" = "NO"; then
+        AC_MSG_ERROR([
+     $WithGhc is a development snapshot of GHC, version $GhcVersion.
+     Bootstrapping using this version of GHC is not supported, and may not
+     work.  Use --enable-bootstrap-with-devel-snapshot to try it anyway,
+     or --with-ghc to specify a different GHC to use.])
+     fi
+  fi
+fi;
+
+# GHC is passed to Cabal, so we need a native path
+if test "${WithGhc}" != ""
+then
+    ghc_host=`"${WithGhc}" +RTS --info | grep 'Host platform' | sed -e 's/.*, "//' -e 's/")//'`
+
+    if test "$ghc_host" = "i386-unknown-mingw32"
+    then
+        if test "${OSTYPE}" = "msys"
+        then
+            WithGhc=`echo "${WithGhc}" | sed "s#^/\([a-zA-Z]\)/#\1:/#"`
+        else
+            # Canonicalise to <drive>:/path/to/ghc
+            WithGhc=`cygpath -m "${WithGhc}"`
+        fi
+        echo "GHC path canonicalised to: ${WithGhc}"
+    fi
+fi
+AC_SUBST([WithGhc])
+
+dnl ** Without optimization some INLINE trickery fails for GHCi
+SRC_CC_OPTS="-O"
+
+dnl Allow to specify iconv options to the toplevel configure script
+dnl so they can be properly passed to sub-builds.
+dnl Note: ICONV_LIB_DIRS and ICONV_INCLUDE_DIRS are not predefined
+dnl to the empty string to allow them to be overridden from the
+dnl environment.
+
+AC_ARG_WITH([iconv-includes],
+  [AC_HELP_STRING([--with-iconv-includes],
+    [directory containing iconv.h])],
+    [ICONV_INCLUDE_DIRS=$withval])
+
+AC_ARG_WITH([iconv-libraries],
+  [AC_HELP_STRING([--with-iconv-libraries],
+    [directory containing iconv library])],
+    [ICONV_LIB_DIRS=$withval])
+
+AC_SUBST(ICONV_INCLUDE_DIRS)
+AC_SUBST(ICONV_LIB_DIRS)
+
 dnl--------------------------------------------------------------------
 dnl * Choose host(/target/build) platform
 dnl--------------------------------------------------------------------
+dnl We don't use the standard autoconf macros for this, but instead
+dnl ask the bootstrapping compiler what platform it is for
 
 dnl Guess host/target/build platform(s) if necessary.
-AC_CANONICAL_SYSTEM
+m4_divert_once([HELP_CANON],
+[[
+System types:
+  --build=BUILD     configure for building on BUILD [guessed]
+  --host=HOST       cross-compile to build programs to run on HOST [guessed]
+  --target=TARGET   configure for building compilers for TARGET [guessed]]])dnl
+
+if test "${WithGhc}" != ""
+then
+        bootstrap_host=`"${WithGhc}" +RTS --info | grep '^ ,("Host platform"' | sed -e 's/.*, "//' -e 's/")//' | tr -d '\r'`
+        bootstrap_target=`"${WithGhc}" +RTS --info | grep '^ ,("Target platform"' | sed -e 's/.*, "//' -e 's/")//' | tr -d '\r'`
+        if test "$bootstrap_host" != "$bootstrap_target"
+        then
+                echo "Bootstrapping GHC is a cross compiler. This probably isn't going to work"
+        fi
+fi
+
+# We have to run these unconditionally, but we may discard their
+# results in the following code
+AC_CANONICAL_BUILD
+AC_CANONICAL_HOST
+AC_CANONICAL_TARGET
+
+# If no argument was given for a configuration variable, then discard
+# the guessed canonical system and use the configuration of the
+# bootstrapping ghc. If an argument was given, map it from gnu format
+# to ghc format.
+#
+# For why we do it this way, see: #3637, #1717, #2951
+
+if test "$build_alias" = ""
+then
+    if test "${WithGhc}" != ""
+    then
+        build=$bootstrap_target
+        echo "Build platform inferred as: $build"
+    else
+        echo "Can't work out build platform"
+        exit 1
+    fi
 
-# "$host" defaults to "$target"
-if test "x$host" = xNONE ; then
-    host=$target
+    BuildArch=`echo "$build" | sed 's/-.*//'`
+    BuildVendor=`echo "$build" | sed -e 's/.*-\(.*\)-.*/\1/'`
+    BuildOS=`echo "$build" | sed 's/.*-//'`
+else
+    GHC_CONVERT_CPU([$build_cpu], [BuildArch])
+    GHC_CONVERT_VENDOR([$build_vendor], [BuildVendor])
+    GHC_CONVERT_OS([$build_os], [BuildOS])
 fi
 
-dnl ** canonicalize platform names
-BuildPlatform=`/bin/sh $srcdir/config.sub $build` || exit 1
-HostPlatform=`/bin/sh $srcdir/config.sub $host` || exit 1
-TargetPlatform=`/bin/sh $srcdir/config.sub $target` || exit 1
+if test "$host_alias" = ""
+then
+    if test "${WithGhc}" != ""
+    then
+        host=$bootstrap_target
+        echo "Host platform inferred as: $host"
+    else
+        echo "Can't work out host platform"
+        exit 1
+    fi
 
-if test x"$TargetPlatform" != x"$HostPlatform" ; then
-    echo "GHC configuration does not support differing host/target (i.e., cross-compiling)"
-    exit 1
+    HostArch=`echo "$host" | sed 's/-.*//'`
+    HostVendor=`echo "$host" | sed -e 's/.*-\(.*\)-.*/\1/'`
+    HostOS=`echo "$host" | sed 's/.*-//'`
+else
+    GHC_CONVERT_CPU([$host_cpu], [HostArch])
+    GHC_CONVERT_VENDOR([$host_vendor], [HostVendor])
+    GHC_CONVERT_OS([$host_os], [HostOS])
+fi
+
+if test "$target_alias" = ""
+then
+    if test "${WithGhc}" != ""
+    then
+        target=$bootstrap_target
+        echo "Target platform inferred as: $target"
+    else
+        echo "Can't work out target platform"
+        exit 1
+    fi
+
+    TargetArch=`echo "$target" | sed 's/-.*//'`
+    TargetVendor=`echo "$target" | sed -e 's/.*-\(.*\)-.*/\1/'`
+    TargetOS=`echo "$target" | sed 's/.*-//'`
+else
+    GHC_CONVERT_CPU([$target_cpu], [TargetArch])
+    GHC_CONVERT_VENDOR([$target_vendor], [TargetVendor])
+    GHC_CONVERT_OS([$target_os], [TargetOS])
 fi
 
 exeext=''
-#
-# The following will be more difficult when we *are* cross-compiling.
-# Suitable names to slam in *_CPP are in platform.h.in.
-# We also record the architecture, vendor, and operating system (OS)
-# separately.
-case $HostPlatform in
-alpha*-dec-osf[[12]]*)
-       HostPlatform=alpha-dec-osf1   # canonicalise for our purposes
-       TargetPlatform=alpha-dec-osf1 # this will work for now... (hack)
-       BuildPlatform=alpha-dec-osf1  # hack
-        HostPlatform_CPP='alpha_dec_osf1'
-        HostArch_CPP='alpha'
-        HostVendor_CPP='dec'
-        HostOS_CPP='osf1'
-        ;;
-alpha*-dec-osf[[345]]*)
-       HostPlatform=alpha-dec-osf3   # canonicalise for our purposes
-       TargetPlatform=alpha-dec-osf3 # this will work for now... (hack)
-       BuildPlatform=alpha-dec-osf3  # hack
-        HostPlatform_CPP='alpha_dec_osf3'
-        HostArch_CPP='alpha'
-        HostVendor_CPP='dec'
-        HostOS_CPP='osf3'
-        ;;
-alpha*-unknown-linux*)
-       HostPlatform=alpha-unknown-linux
-       TargetPlatform=alpha-unknown-linux
-       BuildPlatform=alpha-unknown-linux
-        HostPlatform_CPP='alpha_unknown_linux'
-        HostArch_CPP='alpha'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
-        ;;
-alpha*-unknown-freebsd*)
-       HostPlatform=alpha-unknown-freebsd
-       TargetPlatform=alpha-unknown-freebsd
-       BuildPlatform=alpha-unknown-freebsd
-        HostPlatform_CPP='alpha_unknown_freebsd'
-        HostArch_CPP='alpha'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='freebsd'
-        ;;
-alpha*-unknown-openbsd*)
-       HostPlatform=alpha-unknown-openbsd
-       TargetPlatform=alpha-unknown-openbsd
-       BuildPlatform=alpha-unknown-openbsd
-        HostPlatform_CPP='alpha_unknown_openbsd'
-        HostArch_CPP='alpha'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
-        ;;
-amd64-*-openbsd*|x86_64-*-openbsd*)
-       HostPlatform=x86_64-unknown-openbsd
-       TargetPlatform=x86_64-unknown-openbsd
-       BuildPlatform=x86_64-unknown-openbsd
-        HostPlatform_CPP='x86_64_unknown_openbsd'
-        HostArch_CPP='x86_64'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
-        ;;
-arm*-linux*)
-        HostPlatform=arm-unknown-linux # hack again
-        TargetPlatform=arm-unknown-linux
-        BuildPlatform=arm-unknown-linux
-        HostPlatform_CPP='arm_unknown_linux'                 
-        HostArch_CPP='arm'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
-        ;;
-arm*-openbsd*)
-        HostPlatform=arm-unknown-openbsd
-        TargetPlatform=arm-unknown-openbsd
-        BuildPlatform=arm-unknown-openbsd
-        HostPlatform_CPP='arm_unknown_openbsd'                 
-        HostArch_CPP='arm'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
-        ;;
-hppa*-*-linux*)
-        HostPlatform=hppa-unknown-linux # hack again
-        TargetPlatform=hppa-unknown-linux
-        BuildPlatform=hppa-unknown-linux
-        HostPlatform_CPP='hppa_unknown_linux'                
-        HostArch_CPP='hppa'
-        HostVendor_CPP='unknown'                             
-        HostOS_CPP='linux'
-        ;;
-hppa*-*-openbsd*)
-        HostPlatform=hppa-unknown-openbsd # hack again
-        TargetPlatform=hppa-unknown-openbsd
-        BuildPlatform=hppa-unknown-openbsd
-        HostPlatform_CPP='hppa_unknown_openbsd'                
-        HostArch_CPP='hppa'
-        HostVendor_CPP='unknown'                             
-        HostOS_CPP='openbsd'
-        ;;
-hppa1.1-hp-hpux*)
-       HostPlatform=hppa1.1-hp-hpux  # canonicalise for our purposes (hack)
-       TargetPlatform=hppa1.1-hp-hpux
-       BuildPlatform=hppa1.1-hp-hpux
-        HostPlatform_CPP='hppa1_1_hp_hpux'
-        HostArch_CPP='hppa1_1'
-        HostVendor_CPP='hp'
-        HostOS_CPP='hpux'
-        ;;
-i[[3456]]86-*-linuxaout*)
-       HostPlatform=i386-unknown-linuxaout   # hack again
-       TargetPlatform=i386-unknown-linuxaout
-       BuildPlatform=i386-unknown-linuxaout
-        HostPlatform_CPP='i386_unknown_linuxaout'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linuxaout'
-        ;;
-i[[3456]]86-*-linux*)
-       HostPlatform=i386-unknown-linux # hack again
-       TargetPlatform=i386-unknown-linux
-       BuildPlatform=i386-unknown-linux
-        HostPlatform_CPP='i386_unknown_linux'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
-        ;;
-i[[3456]]86-*-freebsd[[3-9]]*) # FreeBSD 3.0+ uses ELF
-       HostPlatform=i386-unknown-freebsd # hack again
-       TargetPlatform=i386-unknown-freebsd
-       BuildPlatform=i386-unknown-freebsd
-        HostPlatform_CPP='i386_unknown_freebsd'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='freebsd'
-        ;;
-i[[3456]]86-*-freebsd2*) # Older FreeBSDs are a.out
-       HostPlatform=i386-unknown-freebsd2 # hack again
-       TargetPlatform=i386-unknown-freebsd2
-       BuildPlatform=i386-unknown-freebsd2
-        HostPlatform_CPP='i386_unknown_freebsd2'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='freebsd2'
-        ;;
-i[[3456]]86-*-netbsd*)
-       HostPlatform=i386-unknown-netbsd # hack again
-       TargetPlatform=i386-unknown-netbsd
-       BuildPlatform=i386-unknown-netbsd
-        HostPlatform_CPP='i386_unknown_netbsd'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='netbsd'
-        ;;
-i[[3456]]86-*-openbsd*)
-       HostPlatform=i386-unknown-openbsd # hack again
-       TargetPlatform=i386-unknown-openbsd
-       BuildPlatform=i386-unknown-openbsd
-        HostPlatform_CPP='i386_unknown_openbsd'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
-        ;;
-i[[3456]]86-*-solaris2*)
-       HostPlatform=i386-unknown-solaris2 # hack again
-       TargetPlatform=i386-unknown-solaris2
-       BuildPlatform=i386-unknown-solaris2
-        HostPlatform_CPP='i386_unknown_solaris2'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='solaris2'
-        ;;
-i[[3456]]86-*-cygwin*)
-       HostPlatform=i386-unknown-cygwin32 # hack again
-       TargetPlatform=i386-unknown-cygwin32
-       BuildPlatform=i386-unknown-cygwin32
-        HostPlatform_CPP='i386_unknown_cygwin32'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='cygwin32'
-       exeext='.exe'
-        ;;
-i[[3456]]86-*-mingw32*)
-       HostPlatform=i386-unknown-mingw32 # hack again
-       TargetPlatform=i386-unknown-mingw32
-       BuildPlatform=i386-unknown-mingw32
-        HostPlatform_CPP='i386_unknown_mingw32'
-        HostArch_CPP='i386'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='mingw32'
-       exeext='.exe'
-        ;;
-ia64-*-linux*)
-        HostPlatform=ia64-unknown-linux # hack again
-        TargetPlatform=ia64-unknown-linux
-        BuildPlatform=ia64-unknown-linux
-        HostPlatform_CPP='ia64_unknown_linux'
-        HostArch_CPP='ia64'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
-        ;;
-x86_64-*-linux*)
-        HostPlatform=x86_64-unknown-linux
-        TargetPlatform=x86_64-unknown-linux
-        BuildPlatform=x86_64-unknown-linux
-        HostPlatform_CPP='x86_64_unknown_linux'
-        HostArch_CPP='x86_64'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
-       ;;
-m68k-*-linux*)
-        HostPlatform=m68k-unknown-linux # hack again
-        TargetPlatform=m68k-unknown-linux                    
-        BuildPlatform=m68k-unknown-linux
-        HostPlatform_CPP='m68k_unknown_linux'
-        HostArch_CPP='m68k'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
-        ;;
-m68k-next-nextstep2)
-        HostPlatform_CPP='m68k_next_nextstep2'
-        HostArch_CPP='m68k'
-        HostVendor_CPP='next'
-        HostOS_CPP='nextstep2'
-        ;;
-m68k-next-nextstep3)
-        HostPlatform_CPP='m68k_next_nextstep3'
-        HostArch_CPP='m68k'
-        HostVendor_CPP='next'
-        HostOS_CPP='nextstep3'
-        ;;
-i[[3456]]86-next-nextstep3)
-       HostPlatform=i386-next-nextstep3 # hack again
-       TargetPlatform=i386-next-nextstep3
-       BuildPlatform=i386-next-nextstep3
-        HostPlatform_CPP='i386_next_nextstep3'
-        HostArch_CPP='i386'
-        HostVendor_CPP='next'
-        HostOS_CPP='nextstep3'
-        ;;
-m68k-*-openbsd*)
-       HostPlatform=m68k-unknown-openbsd
-       TargetPlatform=m68k-unknown-openbsd
-       BuildPlatform=m68k-unknown-openbsd
-        HostPlatform_CPP='m68k_unknown_openbsd'
-        HostArch_CPP='m68k'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
-        ;;
-m68k-*-netbsd*)
-       HostPlatform=m68k-unknown-netbsd
-       TargetPlatform=m68k-unknown-netbsd
-       BuildPlatform=m68k-unknown-netbsd
-        HostPlatform_CPP='m68k_unknown_netbsd'
-        HostArch_CPP='m68k'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='netbsd'
-        ;;
-m68k-sun-sunos4*)
-       HostPlatform=m68k-sun-sunos4
-       TargetPlatform=m68k-sun-sunos4 #hack
-       BuildPlatform=m68k-sun-sunos4 #hack
-        HostPlatform_CPP='m68k_sun_sunos4'
-        HostArch_CPP='m68k'
-        HostVendor_CPP='sun'
-        HostOS_CPP='sunos4'
-        ;;
-m88k-*-openbsd*)
-       HostPlatform=m88k-unknown-openbsd
-       TargetPlatform=m88k-unknown-openbsd
-       BuildPlatform=m88k-unknown-openbsd
-        HostPlatform_CPP='m88k_unknown_openbsd'
-        HostArch_CPP='m88k'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
-        ;;
-mips-*-linux*)
-        HostPlatform=mips-unknown-linux # hack again
-        TargetPlatform=mips-unknown-linux
-        BuildPlatform=mips-unknown-linux
-        HostPlatform_CPP='mips_unknown_linux'
-        HostArch_CPP='mips'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
-        ;;
-mips-dec-ultrix*)
-        HostPlatform_CPP='mips_dec_ultrix'
-        HostArch_CPP='mipsel'   # NB a little different
-        HostVendor_CPP='dec'
-        HostOS_CPP='ultrix'
-        ;;
-mips-sgi-irix*)
-       HostPlatform=mips-sgi-irix
-       TargetPlatform=mips-sgi-irix #hack
-       BuildPlatform=mips-sgi-irix #hack
-        HostPlatform_CPP='mips_sgi_irix'
-        HostArch_CPP='mipseb'   # NB a little different
-        HostVendor_CPP='sgi'
-        HostOS_CPP='irix'
-        ;;
-rs6000-ibm-aix*)
-       HostPlatform=rs6000-ibm-aix
-       TargetPlatform=rs6000-ibm-aix #hack
-       BuildPlatform=rs6000-ibm-aix #hack
-        HostPlatform_CPP='rs6000_ibm_aix'
-        HostArch_CPP='rs6000'
-        HostVendor_CPP='ibm'
-        HostOS_CPP='aix'
-        ;;
-powerpc-ibm-aix*)
-       HostPlatform=powerpc-ibm-aix
-       TargetPlatform=powerpc-ibm-aix #hack
-       BuildPlatform=powerpc-ibm-aix #hack
-        HostPlatform_CPP='powerpc_ibm_aix'
-        HostArch_CPP='powerpc'
-        HostVendor_CPP='ibm'
-        HostOS_CPP='aix'
-        ;;
-powerpc-apple-darwin*)
-       HostPlatform=powerpc-apple-darwin
-       TargetPlatform=powerpc-apple-darwin #hack
-       BuildPlatform=powerpc-apple-darwin #hack
-       HostPlatform_CPP='powerpc_apple_darwin'
-       HostArch_CPP='powerpc'
-       HostVendor_CPP='apple'
-       HostOS_CPP='darwin'
-       ;;
-powerpc-unknown-linux*)
-        HostPlatform=powerpc-unknown-linux
-        TargetPlatform=powerpc-unknown-linux
-        BuildPlatform=powerpc-unknown-linux
-        HostPlatform_CPP='powerpc_unknown_linux'
-        HostArch_CPP='powerpc'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
-        ;;
-powerpc-unknown-openbsd*)
-        HostPlatform=powerpc-unknown-openbsd
-        TargetPlatform=powerpc-unknown-openbsd
-        BuildPlatform=powerpc-unknown-openbsd
-        HostPlatform_CPP='powerpc_unknown_openbsd'
-        HostArch_CPP='powerpc'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
-        ;;
-s390-ibm-linux*)
-       HostPlatform=s390-ibm-linux
-       TargetPlatform=s390-ibm-linux #hack
-       BuildPlatform=s390-ibm-linux #hack
-        HostPlatform_CPP='s390_ibm_linux'
-        HostArch_CPP='s390'
-        HostVendor_CPP='ibm'
-        HostOS_CPP='linux'
-        ;;
-sparc-sun-sunos4*)
-       HostPlatform=sparc-sun-sunos4
-       TargetPlatform=sparc-sun-sunos4 #hack
-       BuildPlatform=sparc-sun-sunos4 #hack
-        HostPlatform_CPP='sparc_sun_sunos4'
-        HostArch_CPP='sparc'
-        HostVendor_CPP='sun'
-        HostOS_CPP='sunos4'
-        ;;
-sparc-sun-solaris2*)
-       HostPlatform=sparc-sun-solaris2
-       TargetPlatform=sparc-sun-solaris2 #hack
-       BuildPlatform=sparc-sun-solaris2 #hack
-        HostPlatform_CPP='sparc_sun_solaris2'
-        HostArch_CPP='sparc'
-        HostVendor_CPP='sun'
-        HostOS_CPP='solaris2'
+soext='.so'
+case $host in
+*-unknown-cygwin32)
+    AC_MSG_WARN([GHC does not support the Cygwin target at the moment])
+    AC_MSG_WARN([I'm assuming you wanted to build for i386-unknown-mingw32])
+    exit 1
+    ;;
+*-unknown-mingw32)
+    exeext='.exe'
+    soext='.dll'
+    ;;
+i386-apple-darwin|powerpc-apple-darwin)
+    soext='.dylib'
+    CFLAGS="$CFLAGS -m32"
+    LDFLAGS="$LDFLAGS -m32"
+    CONF_CC_OPTS="$CONF_CC_OPTS -m32"
+    CONF_LD_OPTS="$CONF_LD_OPTS -m32"
+    ;;
+x86_64-apple-darwin)
+    soext='.dylib'
+    CFLAGS="$CFLAGS -m64"
+    LDFLAGS="$LDFLAGS -m64"
+    CONF_CC_OPTS="$CONF_CC_OPTS -m64"
+    CONF_LD_OPTS="$CONF_LD_OPTS -m64"
+    ;;
+esac
+
+checkArch() {
+    case $1 in
+    alpha|arm|hppa|hppa1_1|i386|ia64|m68k|mips|mipseb|mipsel|powerpc|powerpc64|rs6000|s390|sparc|sparc64|vax|x86_64)
         ;;
-sparc*-linux*)
-        HostPlatform=sparc-unknown-linux
-        TargetPlatform=sparc-unknown-linux
-        BuildPlatform=sparc-unknown-linux
-        HostPlatform_CPP='sparc_unknown_linux'
-        HostArch_CPP='sparc'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='linux'
+    *)
+        echo "Unknown arch $1"
+        exit 1
         ;;
-sparc-*-openbsd*)
-        HostPlatform=sparc-unknown-openbsd
-        TargetPlatform=sparc-unknown-openbsd
-        BuildPlatform=sparc-unknown-openbsd
-        HostPlatform_CPP='sparc_unknown_openbsd'
-        HostArch_CPP='sparc'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
+    esac
+}
+
+checkVendor() {
+    case $1 in
+    dec|unknown|hp|apple|next|sun|sgi|ibm)
         ;;
-sparc64-*-openbsd*)
-        HostPlatform=sparc64-unknown-openbsd
-        TargetPlatform=sparc64-unknown-openbsd
-        BuildPlatform=sparc64-unknown-openbsd
-        HostPlatform_CPP='sparc64_unknown_openbsd'
-        HostArch_CPP='sparc64'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
+    *)
+        echo "Unknown vendor $1"
+        exit 1
         ;;
-vax-*-openbsd*)
-        HostPlatform=vax-unknown-openbsd
-        TargetPlatform=vax-unknown-openbsd
-        BuildPlatform=vax-unknown-openbsd
-        HostPlatform_CPP='vax_unknown_openbsd'
-        HostArch_CPP='vax'
-        HostVendor_CPP='unknown'
-        HostOS_CPP='openbsd'
+    esac
+}
+
+checkOS() {
+    case $1 in
+    linux|freebsd|netbsd|openbsd|dragonfly|osf1|osf3|hpux|linuxaout|kfreebsdgnu|freebsd2|solaris2|cygwin32|mingw32|darwin|gnu|nextstep2|nextstep3|sunos4|ultrix|irix|aix|haiku)
         ;;
-*)
-        echo "Unrecognised platform: $HostPlatform"
+    *)
+        echo "Unknown OS '$1'"
         exit 1
         ;;
-esac
-echo "Canonicalised to: $HostPlatform"
-test  x"$HostPlatform" != x"$TargetPlatform" && echo "Target platform set to $TargetPlatform"
-test  x"$BuildPlatform" != x"$HostPlatform"  && echo "Build platform set to $BuildPlatform"
-
-BuildPlatform_CPP=$HostPlatform_CPP
-TargetPlatform_CPP=$HostPlatform_CPP
-BuildArch_CPP=$HostArch_CPP
-TargetArch_CPP=$HostArch_CPP
-BuildOS_CPP=$HostOS_CPP
-HostOS_Full=$host_os
-TargetOS_CPP=$HostOS_CPP
-BuildVendor_CPP=$HostVendor_CPP
-TargetVendor_CPP=$HostVendor_CPP
+    esac
+}
+
+BuildPlatform="$BuildArch-$BuildVendor-$BuildOS"
+BuildPlatform_CPP=`echo "$BuildPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
+BuildArch_CPP=`    echo "$BuildArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
+BuildVendor_CPP=`  echo "$BuildVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
+BuildOS_CPP=`      echo "$BuildOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`
+
+checkArch "$BuildArch"
+checkVendor "$BuildVendor"
+checkOS "$BuildOS"
+
+HostPlatform="$HostArch-$HostVendor-$HostOS"
+HostPlatform_CPP=`echo "$HostPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
+HostArch_CPP=`    echo "$HostArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
+HostVendor_CPP=`  echo "$HostVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
+HostOS_CPP=`      echo "$HostOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`
+
+checkArch "$HostArch"
+checkVendor "$HostVendor"
+checkOS "$HostOS"
+
+TargetPlatform="$TargetArch-$TargetVendor-$TargetOS"
+TargetPlatform_CPP=`echo "$TargetPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
+TargetArch_CPP=`    echo "$TargetArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
+TargetVendor_CPP=`  echo "$TargetVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
+TargetOS_CPP=`      echo "$TargetOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`
+
+checkArch "$TargetArch"
+checkVendor "$TargetVendor"
+checkOS "$TargetOS"
 
 AC_SUBST(BuildPlatform)
 AC_SUBST(HostPlatform)
@@ -498,7 +394,6 @@ AC_SUBST(BuildArch_CPP)
 AC_SUBST(TargetArch_CPP)
 
 AC_SUBST(HostOS_CPP)
-AC_SUBST(HostOS_Full)
 AC_SUBST(BuildOS_CPP)
 AC_SUBST(TargetOS_CPP)
 
@@ -507,251 +402,103 @@ AC_SUBST(BuildVendor_CPP)
 AC_SUBST(TargetVendor_CPP)
 
 AC_SUBST(exeext)
-
-dnl --------------------------------------------------------------
-dnl * Calculate absolute path to build tree
-dnl --------------------------------------------------------------
-
-AC_MSG_CHECKING(for path to top of build tree)
-
-hardtop=`pwd`
-
-dnl Remove common automounter nonsense
-dnl
-hardtop=`echo $hardtop | sed 's|^/tmp_mnt.*\(/local/.*\)$|\1|' | sed 's|^/tmp_mnt/|/|' | sed 's|^//\(.\)/|\1:/|' `
-
-dnl Find 'hardtop_plat', the native format for 'hardtop' 
-dnl (i.e., right kind of \dnl slashes on a Win32 box, but with b-slashes being escaped).
-dnl
-dnl Note OSTYPE: On Cygwin we need to use 'cygpath' to convert /cygdrive/c/foo to c:/foo
-dnl             but we must not do that if we aren't building using Cygwin (notably msys), 
-dnl             because cygpath doesn't exist.  It seems that 'bash' sets OSTYPE to 'cygwin' 
-dnl             or 'msys' respectively, but cygwin's 'sh' does not.  So we hackily assume
-dnl             that if the shell hasn't set it to 'msys' then we must be in Cygwin.  Sigh.
-dnl
-dnl             The Right Thing is probably to test $BuildPlatform instead, but we are sloppy 
-dnl             about setting that correctly at the moment, so we just work around for now.
-dnl
-dnl             The quotes round "$(OSTYPE)" are essential, for the Cygwin-sh case where OSTYPE
-dnl             is not set.
-case $HostPlatform in
-  i386-unknown-mingw32 | i386-unknown-cygwin32)
-        if test "${OSTYPE}" != "msys" 
-          then
-            # convert $hardtop to a path that mingw will understand too
-            cyghardtop=${hardtop}
-            hardtop=`cygpath -w ${cyghardtop} | sed -e 's@\\\\@/@g'`
-            hardtop_plat=`cygpath -w ${cyghardtop} | sed -e 's@\\\\@\\\\\\\\@g'`
-          else
-            hardtop_plat=${hardtop}
-        fi
-        ;;
-  *)
-       hardtop_plat=${hardtop}
-       ;;
-esac
-AC_SUBST(hardtop)
-AC_SUBST(hardtop_plat)
-
-AC_MSG_RESULT(${hardtop})
-
-dnl --------------------------------------------------------------
-dnl * Project specific configuration options
-dnl --------------------------------------------------------------
-dnl What follows is a bunch of options that can either be configured
-dnl through command line options to the configure script or by
-dnl supplying defns in the build tree's mk/build.mk. Having the option to
-dnl use either is considered a Feature.
-
-dnl ** What command to use to compile compiler sources ?
-dnl --------------------------------------------------------------
-
-AC_ARG_WITH(ghc,
-[AC_HELP_STRING([--with-ghc=ARG],
-       [Use ARG as the path to GHC  [default=autodetect]])],
-[ WithGhc="$withval" ],
-[ 
-  if test "$GHC" = ""; then
-    AC_PATH_PROG(GHC,ghc)
-  fi
-  WithGhc=$GHC
-])
-AC_SUBST(WithGhc)
+AC_SUBST(soext)
 
 AC_ARG_WITH(hc,
 [AC_HELP_STRING([--with-hc=ARG],
         [Use ARG as the path to the compiler for compiling ordinary
-        Haskell code  (default= value of --with-ghc)])],
+         Haskell code  (default= value of --with-ghc)])],
 [WithHc="$withval"],
 [WithHc=$WithGhc]
 )
 AC_SUBST(WithHc)
 
-if test "$WithGhc" != ""; then
-  FPTOOLS_GHC_VERSION([GhcVersion], [GhcMajVersion], [GhcMinVersion], [GhcPatchLevel])dnl
-  AC_SUBST(GhcVersion)dnl
-  AC_SUBST(GhcMajVersion)dnl
-  AC_SUBST(GhcMinVersion)dnl
-  AC_SUBST(GhcPatchLevel)dnl
-fi
-
 AC_PATH_PROGS(NHC,nhc nhc98)
 AC_PATH_PROG(HBC,hbc)
 
-dnl ** Which gcc to use?
-dnl --------------------------------------------------------------
-AC_ARG_WITH(gcc,
-[AC_HELP_STRING([--with-gcc=ARG],
-        [Use ARG as the path to GCC  [default=autodetect]])],
-[WhatGccIsCalled="$withval"
- if test "x$HostPlatform" = "xi386-unknown-mingw32"
+# This uses GHC, so put it after the "GHC is required" check above:
+FP_FIND_ROOT
+
+if test "$HostOS" = "mingw32"
+then
+    CC="$hardtop/inplace/mingw/bin/gcc.exe"
+    LD="$hardtop/inplace/mingw/bin/ld.exe"
+    NM="$hardtop/inplace/mingw/bin/nm.exe"
+    if ! test -d inplace/mingw ||
+         test inplace/mingw -ot ghc-tarballs/mingw/binutils*.tar.gz ||
+         test inplace/mingw -ot ghc-tarballs/mingw/gcc-core*.tar.gz ||
+         test inplace/mingw -ot ghc-tarballs/mingw/gcc-g++*.tar.gz ||
+         test inplace/mingw -ot ghc-tarballs/mingw/libcrypt*.tar.bz2 ||
+         test inplace/mingw -ot ghc-tarballs/mingw/mingw-runtime*.tar.gz ||
+         test inplace/mingw -ot ghc-tarballs/mingw/w32api*.tar.gz
     then
-       if test "${OSTYPE}" != "msys"
-         then
-         # Canonicalise to <drive>:/path/to/gcc
-         withval=`cygpath -w ${withval} | sed -e 's@\\\\@/@g' `
-       fi
- fi;
- CC="$withval"],
-[WhatGccIsCalled="gcc"]
-)
-AC_SUBST(WhatGccIsCalled)
-
-dnl ** Booting from .hc files?
-dnl --------------------------------------------------------------
-AC_ARG_ENABLE(hc-boot,
-[AC_HELP_STRING([--enable-hc-boot],
-[Boot the Glasgow Haskell Compiler from intermediate .hc files.
- (This option is mostly of interest to porters.) [default=no]])],
-[ if test x"$enableval" = x"yes"; then
-       BootingFromHc=YES
-  else
-       BootingFromHc=NO
-  fi
-],
-[BootingFromHc=NO]
-)
-AC_SUBST(BootingFromHc)
-
-dnl ** Booting from unregisterised .hc files?
-dnl --------------------------------------------------------------
-AC_ARG_ENABLE(hc-boot-unregisterised,
-[AC_HELP_STRING([--enable-hc-boot-unregisterised],
-[ With --enable-hc-boot, treat the intermediate .hc files as
- unregisterised rather than registerised code.
- (This option is mostly of interest to porters.) [default=no]])],
-[ if test x"$enableval" = x"yes"; then
-       BootingFromUnregisterisedHc=YES
-  else
-       BootingFromUnregisterisedHc=NO
-  fi
-],
-[BootingFromUnregisterisedHc=NO]
-)
-AC_SUBST(BootingFromUnregisterisedHc)
-
-if test "$BootingFromHc" = "NO"; then
-if test "$BootingFromUnregisterisedHc" = "YES"; then
-AC_MSG_ERROR([--enable-hc-boot-unregisterised requires --enable-hc-boot.])
-fi;
-fi;
-
-dnl ** Must have GHC to build GHC, unless --enable-hc-boot is on
-if test "$BootingFromHc" = "NO" -a "$WithGhc" = "" -a -d "$srcdir/ghc"; then
-AC_MSG_ERROR([GHC is required unless bootstrapping from .hc files.])
-fi;
-
-dnl ** --enable-threaded-rts (not used any more)
-dnl --------------------------------------------------------------
-AC_ARG_ENABLE(threaded-rts,
-[AC_HELP_STRING([--enable-threaded-rts],
-[DEPRECATED (backwards compatibility only). [default=no]])],
-[ if test x"$enableval" = x"yes"; then
-       ThreadedRts=YES
-  else
-       ThreadedRts=NO
-  fi
-],
-[ThreadedRts=NO]
-)
-AC_SUBST(ThreadedRts)
+        AC_MSG_NOTICE([Making in-tree mingw tree])
+        rm -rf inplace/mingw
+        mkdir inplace
+        mkdir inplace/mingw
+        (
+            cd inplace/mingw &&
+            tar -zxf ../../ghc-tarballs/mingw/binutils*.tar.gz &&
+            tar -zxf ../../ghc-tarballs/mingw/gcc-core*.tar.gz &&
+            tar -zxf ../../ghc-tarballs/mingw/gcc-g++*.tar.gz &&
+            tar -jxf ../../ghc-tarballs/mingw/libcrypt*.tar.bz2 &&
+            tar -zxf ../../ghc-tarballs/mingw/mingw-runtime*.tar.gz &&
+            tar -zxf ../../ghc-tarballs/mingw/w32api*.tar.gz &&
+            mv bin/gcc.exe bin/realgcc.exe
+        )
+        inplace/mingw/bin/realgcc.exe driver/gcc/gcc.c driver/utils/cwrapper.c driver/utils/getLocation.c -Idriver/utils -o inplace/mingw/bin/gcc.exe
+        AC_MSG_NOTICE([In-tree mingw tree created])
+    fi
+    if ! test -d inplace/perl ||
+         test inplace/perl -ot ghc-tarballs/perl/ghc-perl*.tar.gz
+    then
+        AC_MSG_NOTICE([Making in-tree perl tree])
+        rm -rf inplace/perl
+        mkdir inplace
+        mkdir inplace/perl
+        (
+            cd inplace/perl &&
+            tar -zxf ../../ghc-tarballs/perl/ghc-perl*.tar.gz
+        )
+        AC_MSG_NOTICE([In-tree perl tree created])
+    fi
+fi
 
-dnl ** Enable the construction of Win32 DLLs?
+dnl ** Which gcc to use?
 dnl --------------------------------------------------------------
-dnl
-dnl [ The ability to build the RTS and libraries as separate DLLs used
-dnl   to be supported, but isn't currently (updates to the RTS, compiler 
-dnl   and build system would be required to bring it back again.)
-dnl   Hence, exposing it as an option is false advertisement, so better
-dnl   disable it to avoid confusion (but leave it commented-out rather
-dnl   than removed in order to remind ourselves to bring back the 
-dnl   feature at some stage.) ]
-dnl
-dnl AC_ARG_ENABLE(win32-dlls,
-dnl [  --enable-win32-dlls
-dnl         If on a Win32 platform running mingw32/cygwin, enable the
-dnl    construction of DLLs containing ghc-compiled code.
-dnl ],
-dnl [
-dnl case $HostOS_CPP in
-dnl cygwin32) ;;
-dnl mingw32)  ;;
-dnl *)    echo "Unrecognised win32 platform: $HostPlatform"
-dnl       exit 1
-dnl       ;;
-dnl esac
-dnl EnableWin32DLLs=YES
-dnl ],
-dnl [EnableWin32DLLs=NO]
-dnl )
-dnl AC_SUBST(EnableWin32DLLs)
-dnl if test x"$EnableWin32DLLs" = "xYES" ; then
-dnl  AC_DEFINE(HAVE_WIN32_DLL_SUPPORT)
-dnl fi
+FP_ARG_WITH_PATH_GNU_PROG([CC], [gcc])
+export CC
+WhatGccIsCalled="$CC"
+AC_SUBST(WhatGccIsCalled)
 
-dnl ** Enable the building of the ObjectIO?
+dnl ** Which ld to use?
 dnl --------------------------------------------------------------
-AC_ARG_ENABLE(objectio,
-[AC_HELP_STRING([--enable-objectio],
-[Build ObjectIO, a portable GUI library for Haskell. [default=no]])],
-[ if test x"$enableval" = x"yes"; then
-       GhcLibsWithObjectIO=YES
-  else
-       GhcLibsWithObjectIO=NO
-  fi
-],
-[GhcLibsWithObjectIO=NO]
-)
-AC_SUBST(GhcLibsWithObjectIO)
+FP_ARG_WITH_PATH_GNU_PROG([LD], [ld])
+LdCmd="$LD"
+AC_SUBST([LdCmd])
 
-dnl ** Enable the building of the OpenAL binding?
+dnl ** Which nm to use?
 dnl --------------------------------------------------------------
-AC_ARG_ENABLE([openal],
-  AC_HELP_STRING([--enable-openal],
-                 [Build OpenAL binding [[default=autodetect]]]),
-  [ if test x"$enableval" = x"yes"; then
-       GhcLibsWithOpenAL=YES
-    else
-       GhcLibsWithOpenAL=NO
-    fi
-  ],
-  [GhcLibsWithOpenAL=yes])
-
-AC_SUBST([GhcLibsWithOpenAL])
+FP_ARG_WITH_PATH_GNU_PROG([NM], [nm])
+NmCmd="$NM"
+AC_SUBST([NmCmd])
 
-dnl ** .NET interop support?
+dnl ** Mac OS X: explicit deployment target
 dnl --------------------------------------------------------------
-AC_ARG_ENABLE(dotnet,
-[AC_HELP_STRING([--enable-dotnet],
-[Build .NET interop layer. [default=no]])],
-[ if test x"$enableval" = x"yes"; then
-       DotnetSupport=YES; AC_DEFINE([WANT_DOTNET_SUPPORT], [1], [Define to 1 if you want to include .NET interop support.])
-  else 
-       DotnetSupport=NO
-  fi],
-[DotnetSupport=NO]
+AC_ARG_WITH([macosx-deployment-target],
+[AC_HELP_STRING([--with-macosx-deployment-target=VERSION],
+        [Build for Mac OS VERSION and higher  (default= version of build host)])],
+[FP_MACOSX_DEPLOYMENT_TARGET="$withval"
+ if test "x$TargetOS_CPP-$TargetVendor_CPP" != "xdarwin-apple"; then
+   # ignore everywhere, but on Mac OS
+   AC_MSG_WARN([--macosx-deployment-target is only available on Mac OS X])
+   FP_MACOSX_DEPLOYMENT_TARGET=none
+ fi],
+[FP_MACOSX_DEPLOYMENT_TARGET=none]
 )
-AC_SUBST(DotnetSupport)
+FP_CHECK_MACOSX_DEPLOYMENT_TARGET
+AC_SUBST(MACOSX_DEPLOYMENT_VERSION)
+AC_SUBST(MACOSX_DEPLOYMENT_SDK)
 
 dnl --------------------------------------------------------------
 dnl End of configure script option section
@@ -807,28 +554,21 @@ dnl ** look for GCC and find out which version
 dnl     Figure out which C compiler to use.  Gcc is preferred.
 dnl     If gcc, make sure it's at least 2.1
 dnl
-AC_PROG_CC
-FPTOOLS_HAVE_GCC
-FPTOOLS_GCC_NEEDS_NO_OMIT_LFPTR
+FP_HAVE_GCC
+FP_GCC_EXTRA_FLAGS
 
 dnl ** figure out how to invoke cpp directly (gcc -E is no good)
 AC_PROG_CPP
 
-dnl ** Without optimization some INLINE trickery fails for GHCi
-SRC_CC_OPTS="-O"
-
-dnl ** Try to add -mno-cygwin to the C compiler options
-FP_CHECK_FLAG([-mno-cygwin], [
-SRC_CC_OPTS="-mno-cygwin $SRC_CC_OPTS"
-CPPFLAGS="-mno-cygwin $CPPFLAGS"])
-AC_SUBST(SRC_CC_OPTS)
+AC_SUBST(CONF_CC_OPTS)
+AC_SUBST(CONF_LD_OPTS)
 
 dnl ** figure out how to do context diffs
 FP_PROG_CONTEXT_DIFF
 
-dnl ** Find find command (for Win32's benefit)
-FP_PROG_FIND
-
+dnl Let's make sure install-sh is executable here.  If we got it from
+dnl a darcs repo, it might not be (see bug #978).
+chmod +x install-sh
 dnl ** figure out how to do a BSD-ish install
 AC_PROG_INSTALL
 
@@ -836,6 +576,7 @@ dnl If you can run configure, you certainly have /bin/sh
 AC_DEFINE([HAVE_BIN_SH], [1], [Define to 1 if you have /bin/sh.])
 
 dnl ** how to invoke `ar' and `ranlib'
+FP_PROG_AR_SUPPORTS_ATFILE
 FP_PROG_AR_NEEDS_RANLIB
 FP_PROG_AR_SUPPORTS_INPUT
 
@@ -844,7 +585,7 @@ AC_PROG_LN_S
 
 
 dnl ** Find the path to sed
-AC_PATH_PROG(SedCmd,sed)
+AC_PATH_PROGS(SedCmd,gsed sed,sed)
 
 
 dnl ** check for time command
@@ -852,70 +593,48 @@ AC_PATH_PROG(TimeCmd,time)
 
 dnl ** check for tar
 dnl   if GNU tar is named gtar, look for it first.
-AC_PATH_PROGS(TarCmd,gtar tar,tar)
+AC_PATH_PROGS(TarCmd,gnutar gtar tar,tar)
+
+dnl ** check for patch
+dnl if GNU patch is named gpatch, look for it first
+AC_PATH_PROGS(PatchCmd,gpatch patch, patch)
+
+dnl ** check for dtrace (currently only implemented for Mac OS X)
+HaveDtrace=NO
+AC_PATH_PROG(DtraceCmd,dtrace)
+if test -n "$DtraceCmd"; then
+  if test "x$TargetOS_CPP-$TargetVendor_CPP" == "xdarwin-apple"; then
+    HaveDtrace=YES
+  fi
+fi
+AC_SUBST(HaveDtrace)
+
+AC_PATH_PROG(HSCOLOUR,HsColour)
+# HsColour is passed to Cabal, so we need a native path
+if test "x$HostPlatform"  = "xi386-unknown-mingw32" && \
+   test "${OSTYPE}"      != "msys"                  && \
+   test "${HSCOLOUR}"    != ""
+then
+    # Canonicalise to <drive>:/path/to/gcc
+    HSCOLOUR=`cygpath -m ${HSCOLOUR}`
+fi
 
 dnl ** check for DocBook toolchain
 FP_CHECK_DOCBOOK_DTD
-FP_DIR_DOCBOOK_XSL([/usr/share/xml/docbook/stylesheet/nwalsh/current /usr/share/xml/docbook/stylesheet/nwalsh /usr/share/sgml/docbook/docbook-xsl-stylesheets* /usr/share/sgml/docbook/xsl-stylesheets* /opt/kde?/share/apps/ksgmltools2/docbook/xsl /usr/share/docbook-xsl /usr/share/sgml/docbkxsl])
-FP_PROG_FO_PROCESSOR
+FP_DOCBOOK_XSL
+FP_PROG_DBLATEX
+
+FP_PROG_HSTAGS
 
 dnl ** check for ghc-pkg command
 FP_PROG_GHC_PKG
 
-AC_ARG_WITH(greencard,
-[AC_HELP_STRING([--with-greencard=ARG],
-        [Use ARG as the path to greencard  [default=autodetct]])],
-[
-GreenCardCmd=$withval;
-FPTOOLS_GREENCARD(3.00)
-]
-)
-
-AC_ARG_ENABLE(src-tree-happy,
-[AC_HELP_STRING([--enable-src-tree-happy],
-       [Build and use source tree (fptools/happy) version of Happy. 
-        [default=autodetect]])],
-[ if test x"$enableval" = x"yes"; then
-       UseSrcTreeHappy=YES
-  else
-       UseSrcTreeHappy=NO
-  fi
-],
-[UseSrcTreeHappy=NO]
-)
 dnl ** check for installed happy binary + version
 dnl    (don't do it if we're booting from .hc files though.)
 if test "$BootingFromHc" = "NO"; then
 FPTOOLS_HAPPY
 fi;
 
-AC_ARG_ENABLE(src-tree-haddock,
-[AC_HELP_STRING([--enable-src-tree-haddock],
-        [Build and use source tree (fptools/haddock) version of Haddock.
-        [default=autodetect]])],
-[ if test x"$enableval" = x"yes"; then
-       UseSrcTreeHaddock=YES
-  else
-       UseSrcTreeHaddock=NO
-  fi
-],
-[UseSrcTreeHaddock=NO]
-)
-dnl ** check for installed haddock
-FPTOOLS_HADDOCK
-
-AC_ARG_ENABLE(src-tree-alex,
-[AC_HELP_STRING([--enable-src-tree-alex],
-        [Build and use source tree (fptools/alex) version of Alex.
-        [default=autodetect]])],
-[ if test x"$enableval" = x"yes"; then
-       UseSrcTreeAlex=YES
-  else
-       UseSrcTreeAlex=NO
-  fi
-],
-[UseSrcTreeAlex=NO]
-)
 dnl ** check for installed alex binary + version
 dnl    (don't do it if we're booting from .hc files though.)
 if test "$BootingFromHc" = "NO"; then
@@ -938,66 +657,11 @@ dnl    off_t, because it will affect the result of that test.
 AC_SYS_LARGEFILE
 
 dnl ** check for specific header (.h) files that we are interested in
-AC_CHECK_HEADERS([bfd.h ctype.h dirent.h dlfcn.h errno.h fcntl.h grp.h limits.h locale.h nlist.h pthread.h pwd.h signal.h sys/mman.h sys/resource.h sys/time.h sys/timeb.h sys/timers.h sys/times.h sys/utsname.h sys/wait.h termios.h time.h utime.h windows.h winsock.h])
-
-AC_CHECK_HEADER([unistd.h], [AC_CHECK_FUNCS(lchown)])
-
-AC_CHECK_HEADER([readline/readline.h], [HaveReadlineReadlineH=YES], [HaveReadlineReadlineH=NO])
-AC_CHECK_HEADER([readline/history.h], [HaveReadlineHistoryH=YES], [HaveReadlineHistoryH=NO])
-
-if test $HaveReadlineReadlineH = YES && test $HaveReadlineHistoryH = YES ; then
-  GhcLibsWithReadline=YES
-  AC_DEFINE([HAVE_READLINE_HEADERS], [1], [Define to 1 if readline/readline.h and readline/history.h exist.])
-else
-  GhcLibsWithReadline=NO
-  AC_DEFINE([HAVE_READLINE_HEADERS], [0], [Define to 1 if readline/readline.h and readline/history.h exist.])
-fi
-AC_SUBST(GhcLibsWithReadline)
-
-dnl ** check for OpenGL/GLUT include paths and libraries
-FP_CHECK_GLUT
-
-if test x"$no_GLU" = xyes; then
-  GhcLibsWithOpenGL=NO
-else
-  GhcLibsWithOpenGL=YES
-fi
-AC_SUBST([GhcLibsWithOpenGL])
-
-if test x"$no_GLUT" = xyes; then
-  GhcLibsWithGLUT=NO
-else
-  GhcLibsWithGLUT=YES
-fi
-AC_SUBST([GhcLibsWithGLUT])
-
-dnl ** check for OpenGL include files
-fp_save_cppflags="$CPPFLAGS"
-CPPFLAGS="$CPPFLAGS $X_CFLAGS"
-if test x"$use_quartz_opengl" = xyes; then
-  AC_CHECK_HEADERS([OpenGL/gl.h])
-else
-  AC_CHECK_HEADERS([GL/gl.h])
-fi
-CPPFLAGS="$fp_save_cppflags"
+AC_CHECK_HEADERS([bfd.h ctype.h dirent.h dlfcn.h errno.h fcntl.h grp.h limits.h locale.h nlist.h pthread.h pwd.h signal.h sys/mman.h sys/resource.h sys/select.h sys/time.h sys/timeb.h sys/timers.h sys/times.h sys/utsname.h sys/wait.h termios.h time.h utime.h windows.h winsock.h sched.h])
 
 dnl ** check if it is safe to include both <time.h> and <sys/time.h>
 AC_HEADER_TIME
 
-dnl ** check for POSIX regex
-HavePosixRegex=NO
-AC_CHECK_HEADERS([regex.h], [AC_CHECK_FUNCS(regcomp, [HavePosixRegex=YES])])
-AC_SUBST(HavePosixRegex)
-
-dnl ** how do we get a timezone name, and UTC offset ?
-AC_STRUCT_TIMEZONE
-
-dnl ** do we have altzone?
-FP_DECL_ALTZONE
-
-dnl ** does struct stat contain st_blksize?
-AC_STRUCT_ST_BLKSIZE
-
 dnl ** do we have long longs?
 AC_CHECK_TYPES([long long])
 
@@ -1039,69 +703,6 @@ fi
 FP_CHECK_ALIGNMENT(unsigned short)
 FP_CHECK_ALIGNMENT(void *)
 
-dnl ** map standard C types and ISO types to Haskell types
-FPTOOLS_CHECK_HTYPE(char)
-FPTOOLS_CHECK_HTYPE(signed char)
-FPTOOLS_CHECK_HTYPE(unsigned char)
-FPTOOLS_CHECK_HTYPE(short)
-FPTOOLS_CHECK_HTYPE(unsigned short)
-FPTOOLS_CHECK_HTYPE(int)
-FPTOOLS_CHECK_HTYPE(unsigned int)
-FPTOOLS_CHECK_HTYPE(long)
-FPTOOLS_CHECK_HTYPE(unsigned long)
-if test "$ac_cv_type_long_long" = yes; then
-FPTOOLS_CHECK_HTYPE(long long)
-FPTOOLS_CHECK_HTYPE(unsigned long long)
-fi
-FPTOOLS_CHECK_HTYPE(float)
-FPTOOLS_CHECK_HTYPE(double)
-FPTOOLS_CHECK_HTYPE(ptrdiff_t)
-FPTOOLS_CHECK_HTYPE(size_t)
-FPTOOLS_CHECK_HTYPE(wchar_t)
-dnl Int32 is a HACK for non-ISO C compilers
-FPTOOLS_CHECK_HTYPE(sig_atomic_t, Int32)
-FPTOOLS_CHECK_HTYPE(clock_t)
-FPTOOLS_CHECK_HTYPE(time_t)
-FPTOOLS_CHECK_HTYPE(dev_t, Word32)
-FPTOOLS_CHECK_HTYPE(ino_t)
-FPTOOLS_CHECK_HTYPE(mode_t)
-FPTOOLS_CHECK_HTYPE(off_t)
-FPTOOLS_CHECK_HTYPE(pid_t)
-FPTOOLS_CHECK_HTYPE(gid_t)
-FPTOOLS_CHECK_HTYPE(uid_t)
-FPTOOLS_CHECK_HTYPE(cc_t)
-FPTOOLS_CHECK_HTYPE(speed_t)
-FPTOOLS_CHECK_HTYPE(tcflag_t)
-FPTOOLS_CHECK_HTYPE(blkcnt_t)
-FPTOOLS_CHECK_HTYPE(nlink_t)
-FPTOOLS_CHECK_HTYPE(ssize_t)
-FPTOOLS_CHECK_HTYPE(rlim_t)
-FPTOOLS_CHECK_HTYPE(wint_t)
-
-dnl ** Map OpenGL data types to Haskell types
-if test $GhcLibsWithOpenGL = YES ; then
-FPTOOLS_CHECK_HTYPE(GLboolean)
-FPTOOLS_CHECK_HTYPE(GLbyte)
-FPTOOLS_CHECK_HTYPE(GLubyte)
-FPTOOLS_CHECK_HTYPE(GLshort)
-FPTOOLS_CHECK_HTYPE(GLushort)
-FPTOOLS_CHECK_HTYPE(GLint)
-FPTOOLS_CHECK_HTYPE(GLuint)
-FPTOOLS_CHECK_HTYPE(GLsizei)
-FPTOOLS_CHECK_HTYPE(GLenum)
-FPTOOLS_CHECK_HTYPE(GLbitfield)
-FPTOOLS_CHECK_HTYPE(GLfloat)
-FPTOOLS_CHECK_HTYPE(GLclampf)
-FPTOOLS_CHECK_HTYPE(GLdouble)
-FPTOOLS_CHECK_HTYPE(GLclampd)
-fi
-
-FP_CHECK_CONSTS([E2BIG EACCES EADDRINUSE EADDRNOTAVAIL EADV EAFNOSUPPORT EAGAIN EALREADY EBADF EBADMSG EBADRPC EBUSY ECHILD ECOMM ECONNABORTED ECONNREFUSED ECONNRESET EDEADLK EDESTADDRREQ EDIRTY EDOM EDQUOT EEXIST EFAULT EFBIG EFTYPE EHOSTDOWN EHOSTUNREACH EIDRM EILSEQ EINPROGRESS EINTR EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK EMSGSIZE EMULTIHOP ENAMETOOLONG ENETDOWN ENETRESET ENETUNREACH ENFILE ENOBUFS ENODATA ENODEV ENOENT ENOEXEC ENOLCK ENOLINK ENOMEM ENOMSG ENONET ENOPROTOOPT ENOSPC ENOSR ENOSTR ENOSYS ENOTBLK ENOTCONN ENOTDIR ENOTEMPTY ENOTSOCK ENOTTY ENXIO EOPNOTSUPP EPERM EPFNOSUPPORT EPIPE EPROCLIM EPROCUNAVAIL EPROGMISMATCH EPROGUNAVAIL EPROTO EPROTONOSUPPORT EPROTOTYPE ERANGE EREMCHG EREMOTE EROFS ERPCMISMATCH ERREMOTE ESHUTDOWN ESOCKTNOSUPPORT ESPIPE ESRCH ESRMNT ESTALE ETIME ETIMEDOUT ETOOMANYREFS ETXTBSY EUSERS EWOULDBLOCK EXDEV], [#include <stdio.h>
-#include <errno.h>])
-
-dnl ** can we open files in binary mode?
-FP_CHECK_CONST([O_BINARY], [#include <fcntl.h>], [0])
-
 FP_CHECK_FUNC([WinExec],
   [@%:@include <windows.h>], [WinExec("",0)])
 
@@ -1112,16 +713,16 @@ dnl ** check return type of signal handlers
 dnl Foo: assumes we can use prototypes.
 dnl On BCC, signal handlers have type "int(void)", elsewhere its "void(int)".
 dnl AC_CACHE_CHECK([type of signal handlers], ac_cv_type_signal_handler,
-dnl [AC_TRY_COMPILE([#include <sys/types.h>
+dnl [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 dnl #include <signal.h>
 dnl #ifdef signal
 dnl #undef signal
 dnl #endif
 dnl void (*signal (int, void (*)(int)))(int);
-dnl ],
-dnl [int i;], 
-dnl ac_cv_type_signal_handler=void_int,
-dnl ac_cv_type_signal_handler=int_void)])
+dnl ]],
+dnl [[int i;]])],
+dnl [ac_cv_type_signal_handler=void_int],
+dnl [ac_cv_type_signal_handler=int_void])])
 dnl if test "$ac_cv_type_signal_handler" = void_int; then
 dnl AC_DEFINE(VOID_INT_SIGNALS)
 dnl fi
@@ -1133,37 +734,27 @@ if test "$ac_cv_type_signal" = void; then
 fi
 
 dnl ** check for more functions
-AC_CHECK_FUNCS([ftime getclock getgrgid_r getgrnam_r getpagesize getpwnam_r getpwuid_r getrusage gettimeofday gmtime_r localtime_r lstat readdir_r readlink setenv setitimer siginterrupt symlink sysconf times unsetenv])
-
-dnl ** Solaris2 needs additionl flag for getpw*_r()
-case "$TargetPlatform" in
-  *-solaris2*)
-    unix_SRC_HSC2HS_OPTS="-D_POSIX_PTHREAD_SEMANTICS"
-    AC_SUBST(unix_SRC_HSC2HS_OPTS)
-  ;;
-esac
-
-dnl ** check whether this machine has gmp3 installed
-AC_CHECK_LIB(gmp,  __gmpz_fdiv_qr, HaveLibGmp=YES; LibGmp=gmp,
-  AC_CHECK_LIB(gmp3, __gmpz_fdiv_qr,  HaveLibGmp=YES; LibGmp=gmp3,
-    HaveLibGmp=NO; LibGmp=not-installed))
-AC_SUBST(HaveLibGmp)
-AC_SUBST(LibGmp)
-
-dnl ** (Mac OS X only: check for HaskellSupport.framework)
-HaveFrameworkHaskellSupport=NO
-if test $HostPlatform = "powerpc-apple-darwin"; then
- AC_MSG_CHECKING([for HaskellSupport.framework])
- save_libs="$LIBS"
- LIBS="-framework HaskellSupport"
- AC_TRY_LINK_FUNC(__gmpz_fdiv_qr, HaveFrameworkHaskellSupport=YES,)
- if test $HaveFrameworkHaskellSupport = YES; then
-  AC_DEFINE([HAVE_FRAMEWORK_HASKELLSUPPORT], [1], [Define to 1 if the HaskellSupport.framework is installed (Mac OS X only).])
- fi;
- LIBS="$save_libs"
- AC_MSG_RESULT([$HaveFrameworkHaskellSupport])
-fi;
-AC_SUBST(HaveFrameworkHaskellSupport)
+dnl ** The following have been verified to be used in ghc/, but might be used somewhere else, too.
+AC_CHECK_FUNCS([getclock getrusage gettimeofday setitimer siginterrupt sysconf times ctime_r sched_setaffinity setlocale])
+
+AC_TRY_RUN([
+#include <sys/types.h>
+#include <sys/time.h>
+int main(void) {
+  struct itimerval tval;
+  tval.it_value.tv_sec = 1;
+  tval.it_value.tv_usec = 0;
+  tval.it_interval = tval.it_value;
+  return setitimer(ITIMER_VIRTUAL, &tval, (void*)0) != 0;
+}
+],[AC_DEFINE([HAVE_SETITIMER_VIRTUAL], [1], [Define to 1 if setitimer accepts ITIMER_VIRTUAL, 0 else.])])
+
+dnl ** On OS X 10.4 (at least), time.h doesn't declare ctime_r if
+dnl ** _POSIX_C_SOURCE is defined
+AC_CHECK_DECLS([ctime_r], , ,
+[#define _POSIX_SOURCE 1
+#define _POSIX_C_SOURCE 199506L
+#include <time.h>])
 
 dnl ** check for mingwex library
 AC_CHECK_LIB(mingwex, closedir, HaveLibMingwEx=YES, HaveLibMingwEx=NO)
@@ -1173,204 +764,31 @@ if test $HaveLibMingwEx = YES ; then
   AC_DEFINE([HAVE_MINGWEX], [1], [Define to 1 if you have the mingwex library.])
 fi
 
-if test "$HaveLibGmp" = "NO"; then
-if test "$HostArch_CPP" = "ia64" -o "$HostArch_CPP" = "mipseb" ; then
-AC_MSG_ERROR([You need to install libgmp (the in-tree version does not work on IA64 or mips64).])
-fi;
-fi;
+dnl ** check for math library
+dnl    Keep that check as early as possible.
+dnl    as we need to know whether we need libm
+dnl    for math functions or not
+dnl    (see http://hackage.haskell.org/trac/ghc/ticket/3730)
+AC_SEARCH_LIBS(atan, m, 
+  [AC_DEFINE([HAVE_LIBM], [1], [Define to 1 if you need to link with libm])])
 
 dnl ** check whether this machine has BFD and liberty installed (used for debugging)
 dnl    the order of these tests matters: bfd needs liberty
 AC_CHECK_LIB(iberty, xmalloc)
 AC_CHECK_LIB(bfd,    bfd_init)
 
-dnl ** check for wide-char classifications
-dnl FreeBSD has an emtpy wctype.h, so test one of the affected
-dnl functions if it's really there.
-AC_CHECK_HEADERS([wctype.h], [AC_CHECK_FUNCS(iswspace)])
-
-dnl ** check for readline, for Hugs and hslibs' Readline
-dnl ncurses supersedes termcap and curses, but for compatibility,
-dnl we have to check for all...
-AC_CHECK_LIB(ncurses, tputs, HaveLibTermcap=YES; LibTermcap=ncurses,
-  AC_CHECK_LIB(termcap, tputs, HaveLibTermcap=YES; LibTermcap=termcap,
-    AC_CHECK_LIB(curses, tputs, HaveLibTermcap=YES; LibTermcap=curses,
-      HaveLibTermcap=NO; LibTermcap=not-installed)))
-
-if test $HaveLibTermcap = YES ; then
-  LIBS="-l$LibTermcap $LIBS"
-  AC_CHECK_LIB(readline, readline, HaveLibReadline=YES, HaveLibReadline=NO)
-fi
-
-if test $HaveLibTermcap = YES && test x"$HaveLibReadline" = xYES ; then
-  AC_DEFINE([HAVE_READLINE_LIBS], [1], [Define to 1 if readline plus any additional libs needed for it exist.])
-  LibsReadline="readline $LibTermcap"
-else
-  AC_DEFINE([HAVE_READLINE_LIBS], [0], [Define to 1 if readline plus any additional libs needed for it exist.])
-  LibsReadline=
-fi
-AC_SUBST(LibsReadline)
-
-if test "$HaveLibReadline"; then
-  AC_CHECK_LIB(readline, rl_erase_empty_line,
-    [AC_DEFINE([HAVE_READLINE_4], [1], [Define to 1 if readline has version >= 4.0.])],
-    [AC_DEFINE([HAVE_READLINE_4], [0], [Define to 1 if readline has version >= 4.0.])])
-  AC_CHECK_LIB(readline, rl_free_undo_list,
-    [AC_DEFINE([HAVE_READLINE_4_2], [1], [Define to 1 if readline has version >= 4.2.])],
-    [AC_DEFINE([HAVE_READLINE_4_2], [0], [Define to 1 if readline has version >= 4.2.])])
-else
-  AC_DEFINE([HAVE_READLINE_4], [0], [Define to 1 if readline has version >= 4.0.])
-  AC_DEFINE([HAVE_READLINE_4_2], [0], [Define to 1 if readline has version >= 4.2.])
-fi
-
-dnl ** check for math library
-AC_CHECK_LIB([m], [atan], [LIBS="-lm $LIBS"; LIBM="-lm"], [LIBM=])
-AC_SUBST([LIBM])
-
-dnl ** check for X Window System
-AC_PATH_XTRA()
-
-if test "$no_x" = yes; then
-  GhcLibsWithX11=NO
-else
-  GhcLibsWithX11=YES
-fi
-AC_SUBST([GhcLibsWithX11])
-
 dnl ################################################################
 dnl Check for libraries
 dnl ################################################################
 
-dnl ** check for libdl & RTLD_NEXT
-
-dnl (Mac OS X only) ... but don't check if we already have the
-dnl HaskellSupport.framework
-
-if test $HaveFrameworkHaskellSupport = YES; then
-    HaveLibDL=NO
-    HaveRtldNext=NO
-    HaveRtldLocal=YES
-    AC_DEFINE([HAVE_RTLDLOCAL], [1], [Define to 1 if RTLD_LOCAL is available.])
-    HaveRtldGlobal=YES
-    AC_DEFINE([HAVE_RTLDGLOBAL], [1], [Define to 1 if RTLD_GLOBAL is available.])
-    HaveRtldNow=YES
-    AC_DEFINE([HAVE_RTLDNOW], [1], [Define to 1 if we can see RTLD_NOW in dlfcn.h.])
-    AC_SUBST(HaveLibDL)
-    AC_SUBST(HaveRtldNext)
-    AC_SUBST(HaveRtldLocal)
-    AC_SUBST(HaveRtldGlobal)
-    AC_SUBST(HaveRtldNow)
-else
-    AC_CHECK_LIB(dl, dlopen, 
-       [HaveLibDL=YES
-        AC_DEFINE([HAVE_LIBDL], [1], [Define to 1 if you need -ldl to get dlopen().])
-        LIBS="$LIBS -ldl"], 
-       [HaveLibDL=NO])
-    AC_SUBST(HaveLibDL)
-
-    dnl ** sometimes RTLD_NEXT is hidden in #ifdefs we really don't wan to set
-    AC_MSG_CHECKING(for RTLD_NEXT from dlfcn.h)
-    AC_EGREP_CPP(yes,
-    [
-     #include <dlfcn.h>
-     #ifdef RTLD_NEXT
-            yes
-     #endif
-    ], [
-      AC_MSG_RESULT(yes)
-      AC_DEFINE([HAVE_RTLDNEXT], [1], [Define to 1 if we can see RTLD_NEXT in dlfcn.h.])
-      HaveRtldNext=YES
-    ], [
-      AC_MSG_RESULT(no)
-      HaveRtldNext=NO
-      ])    
-    AC_SUBST(HaveRtldNext)
-
-    dnl ** RTLD_LOCAL isn't available on cygwin or openbsd
-    AC_MSG_CHECKING(for RTLD_LOCAL from dlfcn.h)
-    AC_EGREP_CPP(yes,
-    [
-     #include <dlfcn.h>
-     #ifdef RTLD_LOCAL
-            yes
-     #endif
-    ], [
-      AC_MSG_RESULT(yes)
-      AC_DEFINE(HAVE_RTLDLOCAL)
-      HaveRtldLocal=YES
-    ], [
-      AC_MSG_RESULT(no)
-      HaveRtldLocal=NO
-      ])    
-    AC_SUBST(HaveRtldLocal)
-
-    dnl ** RTLD_GLOBAL isn't available on openbsd
-    AC_MSG_CHECKING(for RTLD_GLOBAL from dlfcn.h)
-    AC_EGREP_CPP(yes,
-    [
-     #include <dlfcn.h>
-     #ifdef RTLD_GLOBAL
-            yes
-     #endif
-    ], [
-      AC_MSG_RESULT(yes)
-      AC_DEFINE(HAVE_RTLDGLOBAL)
-      HaveRtldGlobal=YES
-    ], [
-      AC_MSG_RESULT(no)
-      HaveRtldGlobal=NO
-      ])    
-    AC_SUBST(HaveRtldGlobal)
-
-    dnl ** RTLD_NOW isn't available on openbsd
-    AC_MSG_CHECKING(for RTLD_NOW from dlfcn.h)
-    AC_EGREP_CPP(yes,
-    [
-     #include <dlfcn.h>
-     #ifdef RTLD_NOW
-            yes
-     #endif
-    ], [
-      AC_MSG_RESULT(yes)
-      AC_DEFINE(HAVE_RTLDNOW)
-      HaveRtldNow=YES
-    ], [
-      AC_MSG_RESULT(no)
-      HaveRtldNow=NO
-      ])    
-    AC_SUBST(HaveRtldNow)
-fi
-
-dnl ---------- usleep ----------
-dnl --- stolen from guile configure ---
-dnl --- FIXME: /usr/include/unistd.h can't be right?
-
-### On some systems usleep has no return value.  If it does have one,
-### we'd like to return it; otherwise, we'll fake it.
-AC_CACHE_CHECK([return type of usleep], cv_func_usleep_return_type,
-  [AC_EGREP_HEADER(changequote(<, >)<void[      ]+usleep>changequote([, ]),
-                   /usr/include/unistd.h,
-                   [cv_func_usleep_return_type=void],
-                   [cv_func_usleep_return_type=int])])
-case "$cv_func_usleep_return_type" in
-  "void" )
-    AC_DEFINE([USLEEP_RETURNS_VOID], [1], [Define if the system headers declare usleep to return void.])
-  ;;
-esac
-
-dnl --------------------------------------------------
-dnl * test for GTK+
-dnl --------------------------------------------------
+dnl ** check whether we need -ldl to get dlopen()
 
-AC_PATH_PROGS([GTK_CONFIG], [gtk-config gtk12-config])
-if test -n "$GTK_CONFIG"; then
-  AC_CACHE_CHECK([for version of GTK+], [fp_cv_gtk_version],
-    [fp_cv_gtk_version=`$GTK_CONFIG --version`])
-  FP_COMPARE_VERSIONS([$fp_cv_gtk_version], [-lt], [1.2],
-    [AC_MSG_WARN([GTK+ not usable, need at least version 1.2])
-     GTK_CONFIG=])
-fi
-AC_SUBST([GTK_CONFIG])
+AC_CHECK_LIB(dl, dlopen,
+    [HaveLibDL=YES
+     AC_DEFINE([HAVE_LIBDL], [1], [Define to 1 if you need -ldl to get dlopen().])
+     LIBS="$LIBS -ldl"],
+    [HaveLibDL=NO])
+AC_SUBST(HaveLibDL)
 
 dnl --------------------------------------------------
 dnl * Miscellaneous feature tests
@@ -1380,43 +798,204 @@ dnl ** can we get alloca?
 AC_FUNC_ALLOCA
 
 dnl ** Working vfork?
-AC_FUNC_VFORK
+AC_FUNC_FORK
 
 dnl ** determine whether or not const works
 AC_C_CONST
 
 dnl ** are we big endian?
 AC_C_BIGENDIAN
+FPTOOLS_FLOAT_WORD_ORDER_BIGENDIAN
 
 dnl ** check for leading underscores in symbol names
 FP_LEADING_UNDERSCORE
 
-dnl ** check for ld, and whether ld has -x option
-AC_PATH_PROG(LdCmdRaw, ld)
-case $HostOS_CPP in
- mingw32) 
-        if test "${OSTYPE}" == "msys"
-          then
-             LdCmd=${LdCmdRaw}
-          else
-             LdCmd=`cygpath -w ${LdCmdRaw} | sed -e 's@\\\\@/@g' `
-       fi
-          ;;
- *) LdCmd=${LdCmdRaw}
-    ;;
-esac
-AC_SUBST(LdCmd)
-FPTOOLS_LD_X
+dnl ** check for ld, whether it has an -x option, and if it is GNU ld
+FP_PROG_LD_X
+FP_PROG_LD_IS_GNU
+
+dnl ** check for Apple-style dead-stripping support
+dnl    (.subsections-via-symbols assembler directive)
+
+
+AC_MSG_CHECKING(for .subsections_via_symbols)
+AC_COMPILE_IFELSE(
+    [AC_LANG_PROGRAM([], [__asm__ (".subsections_via_symbols");])],
+    [AC_MSG_RESULT(yes)
+     AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[1],
+               [Define to 1 if Apple-style dead-stripping is supported.])
+    ],
+    [AC_MSG_RESULT(no)])
+
+dnl *** check for GNU non-executable stack note support (ELF only)
+dnl     (.section .note.GNU-stack,"",@progbits)
+
+AC_MSG_CHECKING(for GNU non-executable stack support)
+AC_COMPILE_IFELSE(
+    [AC_LANG_PROGRAM([__asm__ (".section .note.GNU-stack,\"\",@progbits");], [0])],
+    [AC_MSG_RESULT(yes)
+     AC_DEFINE([HAVE_GNU_NONEXEC_STACK],[1],
+               [Define to 1 if GNU non-executable stack notes are supported.])
+    ],
+    [AC_MSG_RESULT(no)])
+
+dnl ** check for librt
+AC_CHECK_LIB(rt, clock_gettime)
+AC_CHECK_FUNCS(clock_gettime timer_create timer_settime)
+FP_CHECK_TIMER_CREATE
+
+dnl ** check for Apple's "interesting" long double compatibility scheme
+AC_MSG_CHECKING(for printf\$LDBLStub)
+AC_TRY_LINK_FUNC(printf\$LDBLStub,
+    [
+        AC_MSG_RESULT(yes)
+        AC_DEFINE([HAVE_PRINTF_LDBLSTUB],[1],
+            [Define to 1 if we have printf$LDBLStub (Apple Mac OS >= 10.4, PPC).])
+    ],
+    [
+        AC_MSG_RESULT(no)
+        AC_DEFINE([HAVE_PRINTF_LDBLSTUB],[0],
+            [Define to 1 if we have printf$LDBLStub (Apple Mac OS >= 10.4, PPC).])
+    ])
+
+# test for GTK+
+AC_PATH_PROGS([GTK_CONFIG], [pkg-config])
+if test -n "$GTK_CONFIG"; then
+  if $GTK_CONFIG gtk+-2.0 --atleast-version=2.0; then
+    GTK_CONFIG="$GTK_CONFIG gtk+-2.0"
+  else
+    AC_MSG_WARN([GTK+ not usable, need at least version 2.0])
+    GTK_CONFIG=
+  fi
+fi
+AC_SUBST([GTK_CONFIG])
+
+#Checking for PAPI
+AC_CHECK_LIB(papi, PAPI_library_init, HavePapiLib=YES, HavePapiLib=NO)
+AC_CHECK_HEADER([papi.h], [HavePapiHeader=YES], [HavePapiHeader=NO])
+AC_SUBST(HavePapiLib)
+AC_SUBST(HavePapiHeader)
+
+AC_CHECK_FUNCS(__mingw_vfprintf)
+
+if test "$HavePapiLib" = "YES" -a "$HavePapiHeader" = "YES"; then
+   HavePapi=YES
+else
+   HavePapi=NO
+fi
+AC_SUBST(HavePapi)
+
+if test "$HAVE_DOCBOOK_XSL" = "NO" ||
+   test "$XsltprocCmd" = ""
+then
+    BUILD_DOCBOOK_HTML=NO
+else
+    BUILD_DOCBOOK_HTML=YES
+fi
+AC_SUBST(BUILD_DOCBOOK_HTML)
+
+if test "$DblatexCmd" = ""
+then
+    BUILD_DOCBOOK_PS=NO
+    BUILD_DOCBOOK_PDF=NO
+else
+    BUILD_DOCBOOK_PS=YES
+    BUILD_DOCBOOK_PDF=YES
+fi
+AC_SUBST(BUILD_DOCBOOK_PS)
+AC_SUBST(BUILD_DOCBOOK_PDF)
+
+LIBRARY_VERSION(base)
+LIBRARY_VERSION(Cabal)
+LIBRARY_VERSION(ghc-prim)
+LIBRARY_ghc_VERSION="$ProjectVersion"
+AC_SUBST(LIBRARY_ghc_VERSION)
+
+if grep '      ' compiler/ghc.cabal.in 2>&1 >/dev/null; then
+   AC_MSG_ERROR([compiler/ghc.cabal.in contains tab characters; please remove them])
+fi
+
+AC_CONFIG_FILES([mk/config.mk mk/install.mk mk/project.mk compiler/ghc.cabal ghc/ghc-bin.cabal ghc.spec extra-gcc-opts docs/users_guide/ug-book.xml docs/users_guide/ug-ent.xml docs/index.html libraries/prologue.txt distrib/ghc.iss distrib/configure.ac])
+AC_CONFIG_COMMANDS([mk/stamp-h],[echo timestamp > mk/stamp-h])
+AC_OUTPUT
+
+# We get caught by
+#     http://savannah.gnu.org/bugs/index.php?1516
+#     $(eval ...) inside conditionals causes errors
+# with make 3.80, so warn the user if it looks like they're about to
+# try to use it.
+# We would use "grep -q" here, but Solaris's grep doesn't support it.
+checkMake380() {
+    if $1 --version 2>&1 | head -1 | grep 'GNU Make 3\.80' > /dev/null
+    then
+        echo
+        echo "WARNING: It looks like \"$1\" is GNU make 3.80."
+        echo "This version cannot be used to build GHC."
+        echo "Please use GNU make >= 3.81."
+    fi
+}
+
+checkMake380 make
+checkMake380 gmake
+
+echo ["
+----------------------------------------------------------------------
+Configure completed successfully.
+
+   Building GHC version  : $ProjectVersion
+
+   Build platform        : $BuildPlatform
+   Host platform         : $HostPlatform
+   Target platform       : $TargetPlatform
+"]
+
+if test "$BootingFromHc" = "YES"; then
+echo ["\
+   Bootstrapping from HC files.
+"]
+else
+echo ["\
+   Bootstrapping using   : $WithGhc
+      which is version   : $GhcVersion
+"]
+fi
+
+echo ["\
+   Using GCC             : $WhatGccIsCalled
+      which is version   : $GccVersion
+
+   ld       : $LdCmd
+   Happy    : $HappyCmd ($HappyVersion)
+   Alex     : $AlexCmd ($AlexVersion)
+   Python   : $PythonCmd
+   Perl     : $PerlCmd
+   dblatex  : $DblatexCmd
+   xsltproc : $XsltprocCmd"]
+
+if test "$HSCOLOUR" = ""; then
+echo ["
+   HsColour was not found; documentation will not contain source links
+"]
+else
+echo ["\
+   HsColour : $HSCOLOUR
+"]
+fi
+
+echo ["\
+   Building DocBook HTML documentation : $BUILD_DOCBOOK_HTML
+   Building DocBook PS documentation   : $BUILD_DOCBOOK_PS
+   Building DocBook PDF documentation  : $BUILD_DOCBOOK_PDF"]
+
+echo ["----------------------------------------------------------------------
+"]
 
-FP_EMPTY_STRUCTS
+echo "\
+For a standard build of GHC (fully optimised with profiling), type (g)make.
 
-AC_MSG_CHECKING([for SIGPOLL])
-AC_EGREP_CPP(we_have_sigpoll,
-[#include <signal.h>
-#ifdef SIGPOLL
-we_have_sigpoll
-#endif
-], AC_DEFINE([HAVE_SIGPOLL], [1], [Define to 1 if you have the sigpoll() function.]) haveSIGPOLL=yes, haveSIGPOLL=no)
-AC_MSG_RESULT([$haveSIGPOLL])
+To make changes to the default build configuration, copy the file
+mk/build.mk.sample to mk/build.mk, and edit the settings in there.
 
-AC_OUTPUT(mk/config.mk, echo timestamp > mk/stamp-h )
+For more information on how to configure your GHC build, see
+   http://hackage.haskell.org/trac/ghc/wiki/Building
+"