Maximum supported Menhir version (#275)

The Coq backend of Menhir will soon enjoy a large refactoring, making it incompatible with the version of MenhirLib currently in CompCert. This commit adds a check in configure to make sure that the version of Menhir is not more modern than the current one (20181026).

1 files changed, 3 insertions, 2 deletions

diff --git a/configure b/configure
index 2c50fb49..130944a5 100755
--- a/configure
+++ b/configure
@@ -555,12 +555,13 @@ fi
 
 MENHIR_REQUIRED=20161201
 MENHIR_NEW_API=20180530
+MENHIR_MAX=20181026
 menhir_flags=''
 echo "Testing Menhir... " | tr -d '\n'
 menhir_ver=`menhir --version 2>/dev/null | sed -n -e 's/^.*version \([0-9]*\).*$/\1/p'`
 case "$menhir_ver" in
   20[0-9][0-9][0-9][0-9][0-9][0-9])
-      if test "$menhir_ver" -ge $MENHIR_REQUIRED; then
+      if test "$menhir_ver" -ge $MENHIR_REQUIRED -a "$menhir_ver" -le $MENHIR_MAX; then
           echo "version $menhir_ver -- good!"
           menhir_includes="-I `menhir --suggest-menhirLib`"
           if test "$menhir_ver" -ge $MENHIR_NEW_API; then
@@ -568,7 +569,7 @@ case "$menhir_ver" in
           fi
       else
           echo "version $menhir_ver -- UNSUPPORTED"
-          echo "Error: CompCert requires Menhir version $MENHIR_REQUIRED or later."
+          echo "Error: CompCert requires a version of Menhir between $MENHIR_REQUIRED and $MENHIR_MAX, included."
           missingtools=true
       fi;;
   *)