X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=aclocal.m4;h=f908e9f8f2b76833e83a5d5c556aba3e130e08a5;hb=e30aca19def5c629a8429bd57e56535b7f8f85c8;hp=87149a7dc151547e1ff21e21607a75c04a66083e;hpb=06decfcd62d1ca9069cd4707115ecb92bea39064;p=ghc-hetmet.git

diff --git a/aclocal.m4 b/aclocal.m4
index 87149a7..f908e9f 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -974,15 +974,18 @@ if test "$RELEASE" = "NO"; then
     AC_MSG_CHECKING([for GHC version date])
     if test -d _darcs; then
         changequote(, )dnl
-        ver_date=`darcs changes --last=100 --xml | grep 'date=' | sed "s/^.*date='\([0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]\).*$/\1/g" | sort -n | tail -1`
+        ver_date=`darcs changes --quiet --no-summary --xml | head -500 | grep 'date=' | sed "s/^.*date='\([0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]\).*$/\1/g" | sort -n | tail -1`
+        if echo $ver_date | grep '^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$' 2>&1 >/dev/null; then true; else
         changequote([, ])dnl
+                AC_MSG_ERROR([failed to detect version date: check that darcs is in your path])
+        fi
         PACKAGE_VERSION=${PACKAGE_VERSION}.$ver_date
         AC_MSG_RESULT($PACKAGE_VERSION)
     elif test -f VERSION; then
-        PACKAGE_VERSION=`cat VERSION`        
+        PACKAGE_VERSION=`cat VERSION`
         AC_MSG_RESULT($PACKAGE_VERSION)
     else
-        AC_MSG_ERROR([no version found])                
+        AC_MSG_WARN([cannot determine snapshot version: no _darcs directory and no VERSION file])
     fi
 fi