diff options
Diffstat (limited to 'config/programs.m4')
| -rw-r--r-- | config/programs.m4 | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/config/programs.m4 b/config/programs.m4 index fb9793fac1a..9434113fb0f 100644 --- a/config/programs.m4 +++ b/config/programs.m4 @@ -1,4 +1,44 @@ -# $PostgreSQL: pgsql/config/programs.m4,v 1.20 2006/05/23 19:28:45 momjian Exp $ +# $PostgreSQL: pgsql/config/programs.m4,v 1.21 2007/07/19 17:15:30 tgl Exp $ + + +# PGAC_PATH_YACC +# -------------- +# Look for Bison, set the output variable YACC to its path if found. +# Reject versions before 1.875 (they have bugs or capacity limits). +# Note we do not accept other implementations of yacc. + +AC_DEFUN([PGAC_PATH_YACC], +[# Let the user override the search +if test -z "$YACC"; then + AC_CHECK_PROGS(YACC, ['bison -y']) +fi + +if test "$YACC"; then + pgac_yacc_version=`$YACC --version 2>/dev/null | sed q` + AC_MSG_NOTICE([using $pgac_yacc_version]) + if echo "$pgac_yacc_version" | $AWK '{ if ([$]4 < 1.875) exit 0; else exit 1;}' + then + AC_MSG_WARN([ +*** The installed version of Bison is too old to use with PostgreSQL. +*** Bison version 1.875 or later is required.]) + YACC="" + fi +fi + +if test -z "$YACC"; then + AC_MSG_WARN([ +*** Without Bison you will not be able to build PostgreSQL from CVS nor +*** change any of the parser definition files. You can obtain Bison from +*** a GNU mirror site. (If you are using the official distribution of +*** PostgreSQL then you do not need to worry about this, because the Bison +*** output is pre-generated.) To use a different yacc program (possible, +*** but not recommended), set the environment variable YACC before running +*** 'configure'.]) +fi +# We don't need AC_SUBST(YACC) because AC_PATH_PROG did it +AC_SUBST(YFLAGS) +])# PGAC_PATH_YACC + # PGAC_PATH_FLEX @@ -56,12 +96,12 @@ if test x"$pgac_cv_path_flex" = x"no"; then *** a GNU mirror site. (If you are using the official distribution of *** PostgreSQL then you do not need to worry about this because the Flex *** output is pre-generated.)]) -fi -if test x"$pgac_cv_path_flex" = x"no"; then FLEX= else FLEX=$pgac_cv_path_flex + pgac_flex_version=`$FLEX -V 2>/dev/null` + AC_MSG_NOTICE([using $pgac_flex_version]) fi AC_SUBST(FLEX) |