Clarify error message (Trac #3805)

[ghc-hetmet.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 2e87ea5..bc5c62b 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -296,7 +296,7 @@ checkVendor() {
 
 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)
+    linux|freebsd|netbsd|openbsd|dragonfly|osf1|osf3|hpux|linuxaout|kfreebsdgnu|freebsd2|solaris2|cygwin32|mingw32|darwin|gnu|nextstep2|nextstep3|sunos4|ultrix|irix|aix|haiku)
         ;;
     *)
         echo "Unknown OS '$1'"
@@ -558,6 +558,16 @@ 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" && \
@@ -606,7 +616,7 @@ 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 sched.h])
+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
@@ -713,18 +723,19 @@ if test $HaveLibMingwEx = YES ; then
   AC_DEFINE([HAVE_MINGWEX], [1], [Define to 1 if you have the mingwex library.])
 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 math library
-AC_CHECK_FUNC(atan,[fp_libm_not_needed=yes;LIBM=],[fp_libm_not_needed=dunno])
-if test x"$fp_libm_not_needed" = xdunno; then
-   AC_CHECK_LIB([m], [atan], [LIBS="-lm $LIBS"; LIBM="-lm"],[LIBM=])
-fi
-AC_SUBST([LIBM])
-
 dnl ################################################################
 dnl Check for libraries
 dnl ################################################################
@@ -857,7 +868,7 @@ 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 distrib/ghc.iss distrib/configure-bin.ac])
+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 distrib/ghc.iss distrib/configure.ac])
 AC_CONFIG_COMMANDS([mk/stamp-h],[echo timestamp > mk/stamp-h])
 AC_OUTPUT