X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=configure.ac;h=7d27a376c32073b3819589c1f7355a72efa7a91f;hp=042f33ba8fa36a4080fa4e403882a16ccf7aaf02;hb=133d09024cdead191873088b7248f5d96aafe60f;hpb=aea7d71f37c69e778047e5c3f19d4c75260d2405

diff --git a/configure.ac b/configure.ac
index 042f33b..7d27a37 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,6 +15,11 @@ dnl
 
 AC_INIT([The Glorious Glasgow Haskell Compilation System], [6.5], [glasgow-haskell-bugs@haskell.org], [ghc])
 
+if test ! -f mk/config.h.in; then
+   echo "mk/config.h.in doesn't exist: perhaps you haven't run 'autoreconf'?"
+   exit 1
+fi
+
 FP_SETUP_PROJECT_VERSION
 
 # Hmmm, we fix the RPM release number to 1 here... Is this convenient?
@@ -610,7 +615,12 @@ case $HostPlatform in
             hardtop=`cygpath -w ${cyghardtop} | sed -e 's@\\\\@/@g'`
             hardtop_plat=`cygpath -w ${cyghardtop} | sed -e 's@\\\\@\\\\\\\\@g'`
           else
-            hardtop_plat=${hardtop}
+dnl OK, so we're in the MSYS case.  hardtop looks like /c/....
+dnl We want to make hardtop_plat into c:/...
+dnl Stop using [] for quotes temporarily, so we can use [] in the sed regexp
+changequote(, )dnl
+               hardtop_plat=`echo ${hardtop} | sed -e 's@^/\\([a-zA-Z]\\)/@\\1:/@g'`
+changequote([, ])dnl
         fi
         ;;
   *)