From 28e02b8fde7356fb917e36a20d9ddeb19aded53a Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 2 May 2016 11:18:11 -0400
Subject: [PATCH] Fix configure's incorrect version tests for flex and perl.
awk's equality-comparison operator is "==" not "=". We got this right
in many places, but not in configure's checks for supported version
numbers of flex and perl. It hadn't been noticed because unsupported
versions are so old as to be basically extinct in the wild, and because
the only consequence is whether or not a WARNING flies by during
configure.
Daniel Gustafsson noted the problem with respect to the test for flex,
I found the other by reviewing other awk calls.
---
config/perl.m4 | 2 +-
config/programs.m4 | 2 +-
configure | 4 ++--
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/config/perl.m4 b/config/perl.m4
index d602a5bb1b0..48ae2703b48 100644
--- a/config/perl.m4
+++ b/config/perl.m4
@@ -13,7 +13,7 @@ if test "$PERL"; then
pgac_perl_version=`$PERL -v 2>/dev/null | sed -n ['s/This is perl.*v[a-z ]*\([0-9]\.[0-9][0-9.]*\).*$/\1/p']`
AC_MSG_NOTICE([using perl $pgac_perl_version])
if echo "$pgac_perl_version" | sed ['s/[.a-z_]/ /g'] | \
- $AWK '{ if ([$]1 = 5 && [$]2 >= 8) exit 1; else exit 0;}'
+ $AWK '{ if ([$]1 == 5 && [$]2 >= 8) exit 1; else exit 0;}'
then
AC_MSG_WARN([
*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
diff --git a/config/programs.m4 b/config/programs.m4
index 57bbe962c39..c9f0740800a 100644
--- a/config/programs.m4
+++ b/config/programs.m4
@@ -69,7 +69,7 @@ else
echo '%%' > conftest.l
if $pgac_candidate -t conftest.l 2>/dev/null | grep FLEX_SCANNER >/dev/null 2>&1; then
pgac_flex_version=`$pgac_candidate --version 2>/dev/null`
- if echo "$pgac_flex_version" | sed ['s/[.a-z]/ /g'] | $AWK '{ if ([$]1 = 2 && ([$]2 > 5 || ([$]2 = 5 && [$]3 >= 31))) exit 0; else exit 1;}'
+ if echo "$pgac_flex_version" | sed ['s/[.a-z]/ /g'] | $AWK '{ if ([$]1 == 2 && ([$]2 > 5 || ([$]2 == 5 && [$]3 >= 31))) exit 0; else exit 1;}'
then
pgac_cv_path_flex=$pgac_candidate
break 2
diff --git a/configure b/configure
index e9b3975da9a..2d67fadd07a 100755
--- a/configure
+++ b/configure
@@ -7164,7 +7164,7 @@ else
echo '%%' > conftest.l
if $pgac_candidate -t conftest.l 2>/dev/null | grep FLEX_SCANNER >/dev/null 2>&1; then
pgac_flex_version=`$pgac_candidate --version 2>/dev/null`
- if echo "$pgac_flex_version" | sed 's/[.a-z]/ /g' | $AWK '{ if ($1 = 2 && ($2 > 5 || ($2 = 5 && $3 >= 31))) exit 0; else exit 1;}'
+ if echo "$pgac_flex_version" | sed 's/[.a-z]/ /g' | $AWK '{ if ($1 == 2 && ($2 > 5 || ($2 == 5 && $3 >= 31))) exit 0; else exit 1;}'
then
pgac_cv_path_flex=$pgac_candidate
break 2
@@ -7262,7 +7262,7 @@ if test "$PERL"; then
{ $as_echo "$as_me:$LINENO: using perl $pgac_perl_version" >&5
$as_echo "$as_me: using perl $pgac_perl_version" >&6;}
if echo "$pgac_perl_version" | sed 's/[.a-z_]/ /g' | \
- $AWK '{ if ($1 = 5 && $2 >= 8) exit 1; else exit 0;}'
+ $AWK '{ if ($1 == 5 && $2 >= 8) exit 1; else exit 0;}'
then
{ $as_echo "$as_me:$LINENO: WARNING:
*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
--
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