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Bump minimum version of Flex to 2.5.35

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Since the retirement of some older buildfarm members, the oldest Flex
that gets regular testing is 2.5.35.

Reviewed by Andres Freund
Discussion: https://www.postgresql.org/message-id/1097762.1662145681@sss.pgh.pa.us
This commit is contained in:
John Naylor
2022-09-06 11:41:58 +07:00
parent b086a47a27
commit 8b878bffa8
6 changed files with 12 additions and 14 deletions
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10
config/programs.m4
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@ -65,10 +65,8 @@ AC_SUBST(BISONFLAGS)
# PGAC_PATH_FLEX
# --------------
# Look for Flex, set the output variable FLEX to its path if found.
# Reject versions before 2.5.31, as we need a reasonably non-buggy reentrant
# scanner. (Note: the well-publicized security problem in 2.5.31 does not
# affect Postgres, and there are still distros shipping patched 2.5.31,
# so allow it.) Also find Flex if its installed under `lex', but do not
# Reject versions before 2.5.35 (the earliest version in the buildfarm
# as of 2022). Also find Flex if its installed under `lex', but do not
# accept other Lex programs.
AC_DEFUN([PGAC_PATH_FLEX],
@ -92,14 +90,14 @@ 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 && [$]3 >= 35))) exit 0; else exit 1;}'
then
pgac_cv_path_flex=$pgac_candidate
break 2
else
AC_MSG_WARN([
*** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
*** Flex version 2.5.31 or later is required, but this is $pgac_flex_version.])
*** Flex version 2.5.35 or later is required, but this is $pgac_flex_version.])
fi
fi
fi