--- configure.ac 2002/03/14 15:29:23 1.20
+++ configure.ac 2002/07/01 17:50:15 1.21
@@ -47,22 +47,54 @@
dnl # check for developer tools:
dnl # GNU Bison and GNU Flex
if test ".$enable_maintainer" = .yes; then
- AC_PATH_PROG(BISON, bison, NA)
+ dnl # check for GNU Bison >= 1.30
+ bison_version=""
+ for prog in bison bison-beta bison-alpha bison-snap; do
+ AC_PATH_PROG(BISON, $prog, NA)
+ if test ".$BISON" != .NA; then
+ bison_version=`($BISON --version | head -1 | sed -e 's;^[[^0-9]]*\([[0-9]][[0-9.]]*\).*;\1;') 2>/dev/null`
+ case "$bison_version" in
+ 1.3[[0-9]] | 1.[[4-9]] ) break ;;
+ * ) BISON="NA"; unset ac_cv_path_BISON ;;
+ esac
+ else
+ unset ac_cv_path_BISON
+ fi
+ done
if test ".$BISON" = .NA; then
- AC_ERROR([require GNU Bison])
+ if test ".$bison_version" != .; then
+ AC_ERROR([found GNU Bison version $bison_version; require version >= 1.30])
+ else
+ AC_ERROR([require GNU Bison version >= 1.30])
+ fi
fi
- AC_PATH_PROG(FLEX, flex, NA)
+ dnl # check for GNU Flex >= 2.5.6
+ flex_version=""
+ for prog in flex flex-beta flex-alpha flex-snap; do
+ AC_PATH_PROG(FLEX, $prog, NA)
+ if test ".$FLEX" != .NA; then
+ flex_version=`($FLEX --version | head -1 | sed -e 's;^[[^0-9]]*\([[0-9]][[0-9.]]*\).*;\1;') 2>/dev/null`
+ case "$flex_version" in
+ 2.5.[[6-9]] | 2.5.1[[0-9]] | 2.[[6-9]].* ) break ;;
+ * ) FLEX="NA"; unset ac_cv_path_FLEX ;;
+ esac
+ else
+ unset ac_cv_path_FLEX
+ fi
+ done
if test ".$FLEX" = .NA; then
- AC_ERROR([require GNU Flex])
+ if test ".$flex_version" != .; then
+ AC_ERROR([found GNU Flex version $flex_version; require version >= 2.5.6])
+ else
+ AC_ERROR([require GNU Flex version >= 2.5.6])
+ fi
fi
- flex_version=`(flex --version 2>/dev/null | awk '{ print $3; }')`
- case "$flex_version" in
- 2.[[5-6]].[[6-9]] ) ;;
- * ) AC_ERROR([found GNU Flex version $flex_version; require version >= 2.5.6 (DEVELOPER VERSION!)]) ;;
- esac
else
+ dnl # disable the use of the tools, but still allow manual override
+ test ".$BISON" = . && BISON=true
AC_PATH_PROG(BISON, bison, true)
- AC_PATH_PROG(FLEX, flex, true)
+ test ".$FLEX" = . && FLEX=true
+ AC_PATH_PROG(FLEX, flex, true)
fi
AC_CHECK_LIB(nsl, gethostname)
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