X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=configure.ac;h=afe7a05b169a2fc5cce684997ce76fc156336203;hb=701cf5711388f44acc778bdce4262a2d7ac7f039;hp=a18f2f7a4d85c446a81e58376456a963f3600930;hpb=2247d4c49e705ee88f5249368e718c12897fe103;p=ghc-hetmet.git

diff --git a/configure.ac b/configure.ac
index a18f2f7..afe7a05 100644
--- a/configure.ac
+++ b/configure.ac
@@ -282,6 +282,7 @@ x86_64-apple-darwin)
     ;;
 esac
 
+# Sync this with cTargetArch in compiler/ghc.mk
 checkArch() {
     case $1 in
     alpha|arm|hppa|hppa1_1|i386|ia64|m68k|mips|mipseb|mipsel|powerpc|powerpc64|rs6000|s390|sparc|sparc64|vax|x86_64)
@@ -345,6 +346,16 @@ checkArch "$TargetArch"
 checkVendor "$TargetVendor"
 checkOS "$TargetOS"
 
+# Verify that the installed (bootstrap) GHC is capable of generating
+# code for the requested build platform.
+if test "$build" != "$bootstrap_target"
+then
+    echo "This GHC (${WithGhc}) does not generate code for the build platform"
+    echo "   GHC target platform    : $bootstrap_target"
+    echo "   Desired build platform : $BuildPlatform"
+    exit 1
+fi
+
 AC_SUBST(BuildPlatform)
 AC_SUBST(HostPlatform)
 AC_SUBST(TargetPlatform)
@@ -388,6 +399,9 @@ then
     LD="$hardtop/inplace/mingw/bin/ld.exe"
     NM="$hardtop/inplace/mingw/bin/nm.exe"
     fp_prog_ar_raw="$hardtop/inplace/mingw/bin/ar.exe"
+
+    # NB. If you update the tarbballs to a new version of gcc, don't
+    # forget to tweak the paths in driver/gcc/gcc.c.
     if ! test -d inplace/mingw ||
          test inplace/mingw -ot ghc-tarballs/mingw/binutils*.tar.lzma  ||
          test inplace/mingw -ot ghc-tarballs/mingw/gcc-core*.tar.lzma  ||