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Adjust configure script to print the bison and flex versions in use.

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Minor rearrangements to make a few tests in a more logical order.
This commit is contained in:
Tom Lane
2007-07-19 17:15:30 +00:00
parent d514ea3fda
commit 177be3f9bb
3 changed files with 236 additions and 209 deletions
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46
config/programs.m4
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@ -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)