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7d7b129277
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.
279 lines
8.8 KiB
Plaintext
279 lines
8.8 KiB
Plaintext
# config/programs.m4
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# PGAC_PATH_BISON
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# ---------------
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# Look for Bison, set the output variable BISON to its path if found.
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# Reject versions before 1.875 (they have bugs or capacity limits).
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# Note we do not accept other implementations of yacc.
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AC_DEFUN([PGAC_PATH_BISON],
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[# Let the user override the search
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if test -z "$BISON"; then
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AC_PATH_PROGS(BISON, bison)
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fi
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if test "$BISON"; then
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pgac_bison_version=`$BISON --version 2>/dev/null | sed q`
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AC_MSG_NOTICE([using $pgac_bison_version])
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if echo "$pgac_bison_version" | $AWK '{ if ([$]4 < 1.875) exit 0; else exit 1;}'
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then
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AC_MSG_WARN([
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*** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
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*** Bison version 1.875 or later is required, but this is $pgac_bison_version.])
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BISON=""
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fi
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# Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
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# of the now preferred %name-prefix "base_yy", but the latter
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# doesn't work with Bison 2.3 or less. So for now we silence the
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# deprecation warnings.
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if echo "$pgac_bison_version" | $AWK '{ if ([$]4 >= 3) exit 0; else exit 1;}'
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then
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BISONFLAGS="$BISONFLAGS -Wno-deprecated"
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fi
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fi
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if test -z "$BISON"; then
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AC_MSG_WARN([
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*** Without Bison you will not be able to build PostgreSQL from Git nor
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*** change any of the parser definition files. You can obtain Bison from
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*** a GNU mirror site. (If you are using the official distribution of
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*** PostgreSQL then you do not need to worry about this, because the Bison
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*** output is pre-generated.)])
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fi
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# We don't need AC_SUBST(BISON) because AC_PATH_PROG did it
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AC_SUBST(BISONFLAGS)
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])# PGAC_PATH_BISON
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# PGAC_PATH_FLEX
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# --------------
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# Look for Flex, set the output variable FLEX to its path if found.
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# Reject versions before 2.5.31, as we need a reasonably non-buggy reentrant
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# scanner. (Note: the well-publicized security problem in 2.5.31 does not
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# affect Postgres, and there are still distros shipping patched 2.5.31,
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# so allow it.) Also find Flex if its installed under `lex', but do not
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# accept other Lex programs.
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AC_DEFUN([PGAC_PATH_FLEX],
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[AC_CACHE_CHECK([for flex], pgac_cv_path_flex,
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[# Let the user override the test
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if test -n "$FLEX"; then
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pgac_cv_path_flex=$FLEX
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else
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pgac_save_IFS=$IFS
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IFS=$PATH_SEPARATOR
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for pgac_dir in $PATH; do
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IFS=$pgac_save_IFS
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if test -z "$pgac_dir" || test x"$pgac_dir" = x"."; then
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pgac_dir=`pwd`
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fi
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for pgac_prog in flex lex; do
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pgac_candidate="$pgac_dir/$pgac_prog"
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if test -f "$pgac_candidate" \
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&& $pgac_candidate --version </dev/null >/dev/null 2>&1
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then
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echo '%%' > conftest.l
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if $pgac_candidate -t conftest.l 2>/dev/null | grep FLEX_SCANNER >/dev/null 2>&1; then
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pgac_flex_version=`$pgac_candidate --version 2>/dev/null`
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if echo "$pgac_flex_version" | sed ['s/[.a-z]/ /g'] | $AWK '{ if ([$]1 == 2 && ([$]2 > 5 || ([$]2 == 5 && [$]3 >= 31))) exit 0; else exit 1;}'
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then
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pgac_cv_path_flex=$pgac_candidate
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break 2
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else
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AC_MSG_WARN([
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*** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
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*** Flex version 2.5.31 or later is required, but this is $pgac_flex_version.])
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fi
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fi
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fi
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done
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done
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rm -f conftest.l lex.yy.c
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: ${pgac_cv_path_flex=no}
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fi
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])[]dnl AC_CACHE_CHECK
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if test x"$pgac_cv_path_flex" = x"no"; then
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AC_MSG_WARN([
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*** Without Flex you will not be able to build PostgreSQL from Git nor
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*** change any of the scanner definition files. You can obtain Flex from
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*** a GNU mirror site. (If you are using the official distribution of
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*** PostgreSQL then you do not need to worry about this because the Flex
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*** output is pre-generated.)])
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FLEX=
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else
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FLEX=$pgac_cv_path_flex
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pgac_flex_version=`$FLEX --version 2>/dev/null`
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AC_MSG_NOTICE([using $pgac_flex_version])
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fi
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AC_SUBST(FLEX)
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AC_SUBST(FLEXFLAGS)
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])# PGAC_PATH_FLEX
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# PGAC_LDAP_SAFE
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# --------------
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# PostgreSQL sometimes loads libldap_r and plain libldap into the same
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# process. Check for OpenLDAP versions known not to tolerate doing so; assume
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# non-OpenLDAP implementations are safe. The dblink test suite exercises the
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# hazardous interaction directly.
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AC_DEFUN([PGAC_LDAP_SAFE],
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[AC_CACHE_CHECK([for compatible LDAP implementation], [pgac_cv_ldap_safe],
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
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[#include <ldap.h>
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#if !defined(LDAP_VENDOR_VERSION) || \
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(defined(LDAP_API_FEATURE_X_OPENLDAP) && \
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LDAP_VENDOR_VERSION >= 20424 && LDAP_VENDOR_VERSION <= 20431)
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choke me
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#endif], [])],
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[pgac_cv_ldap_safe=yes],
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[pgac_cv_ldap_safe=no])])
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if test "$pgac_cv_ldap_safe" != yes; then
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AC_MSG_WARN([
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*** With OpenLDAP versions 2.4.24 through 2.4.31, inclusive, each backend
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*** process that loads libpq (via WAL receiver, dblink, or postgres_fdw) and
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*** also uses LDAP will crash on exit.])
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fi])
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# PGAC_CHECK_READLINE
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# -------------------
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# Check for the readline library and dependent libraries, either
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# termcap or curses. Also try libedit, since NetBSD's is compatible.
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# Add the required flags to LIBS, define HAVE_LIBREADLINE.
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AC_DEFUN([PGAC_CHECK_READLINE],
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[AC_REQUIRE([AC_CANONICAL_HOST])
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AC_CACHE_CHECK([for library containing readline], [pgac_cv_check_readline],
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[pgac_cv_check_readline=no
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pgac_save_LIBS=$LIBS
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if test x"$with_libedit_preferred" != x"yes"
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then READLINE_ORDER="-lreadline -ledit"
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else READLINE_ORDER="-ledit -lreadline"
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fi
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for pgac_rllib in $READLINE_ORDER ; do
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for pgac_lib in "" " -ltermcap" " -lncurses" " -lcurses" ; do
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LIBS="${pgac_rllib}${pgac_lib} $pgac_save_LIBS"
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AC_TRY_LINK_FUNC([readline], [[
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# Older NetBSD, OpenBSD, and Irix have a broken linker that does not
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# recognize dependent libraries; assume curses is needed if we didn't
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# find any dependency.
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case $host_os in
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netbsd* | openbsd* | irix*)
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if test x"$pgac_lib" = x"" ; then
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pgac_lib=" -lcurses"
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fi ;;
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esac
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pgac_cv_check_readline="${pgac_rllib}${pgac_lib}"
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break
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]])
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done
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if test "$pgac_cv_check_readline" != no ; then
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break
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fi
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done
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LIBS=$pgac_save_LIBS
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])[]dnl AC_CACHE_CHECK
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if test "$pgac_cv_check_readline" != no ; then
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LIBS="$pgac_cv_check_readline $LIBS"
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AC_DEFINE(HAVE_LIBREADLINE, 1, [Define if you have a function readline library])
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fi
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])# PGAC_CHECK_READLINE
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# PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER
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# ---------------------------------------
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# Readline versions < 2.1 don't have rl_completion_append_character
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AC_DEFUN([PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER],
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[AC_CACHE_CHECK([for rl_completion_append_character], pgac_cv_var_rl_completion_append_character,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
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#ifdef HAVE_READLINE_READLINE_H
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# include <readline/readline.h>
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#elif defined(HAVE_READLINE_H)
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# include <readline.h>
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#endif
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],
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[rl_completion_append_character = 'x';])],
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[pgac_cv_var_rl_completion_append_character=yes],
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[pgac_cv_var_rl_completion_append_character=no])])
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if test x"$pgac_cv_var_rl_completion_append_character" = x"yes"; then
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AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER, 1,
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[Define to 1 if you have the global variable 'rl_completion_append_character'.])
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fi])# PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER
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# PGAC_CHECK_GETTEXT
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# ------------------
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# We check for bind_textdomain_codeset() not just gettext(). GNU gettext
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# before 0.10.36 does not have that function, and is generally too incomplete
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# to be usable.
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AC_DEFUN([PGAC_CHECK_GETTEXT],
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[
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AC_SEARCH_LIBS(bind_textdomain_codeset, intl, [],
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[AC_MSG_ERROR([a gettext implementation is required for NLS])])
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AC_CHECK_HEADER([libintl.h], [],
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[AC_MSG_ERROR([header file <libintl.h> is required for NLS])])
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AC_CHECK_PROGS(MSGFMT, msgfmt)
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if test -z "$MSGFMT"; then
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AC_MSG_ERROR([msgfmt is required for NLS])
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fi
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AC_CACHE_CHECK([for msgfmt flags], pgac_cv_msgfmt_flags,
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[if test x"$MSGFMT" != x"" && "$MSGFMT" --version 2>&1 | grep "GNU" >/dev/null; then
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pgac_cv_msgfmt_flags=-c
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fi])
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AC_SUBST(MSGFMT_FLAGS, $pgac_cv_msgfmt_flags)
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AC_CHECK_PROGS(MSGMERGE, msgmerge)
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AC_CHECK_PROGS(XGETTEXT, xgettext)
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])# PGAC_CHECK_GETTEXT
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# PGAC_CHECK_STRIP
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# ----------------
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# Check for a 'strip' program, and figure out if that program can
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# strip libraries.
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AC_DEFUN([PGAC_CHECK_STRIP],
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[
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AC_CHECK_TOOL(STRIP, strip, :)
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AC_MSG_CHECKING([whether it is possible to strip libraries])
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if test x"$STRIP" != x"" && "$STRIP" -V 2>&1 | grep "GNU strip" >/dev/null; then
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STRIP_STATIC_LIB="$STRIP -x"
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STRIP_SHARED_LIB="$STRIP --strip-unneeded"
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AC_MSG_RESULT(yes)
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else
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case $host_os in
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darwin*)
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STRIP="$STRIP -x"
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STRIP_STATIC_LIB=$STRIP
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STRIP_SHARED_LIB=$STRIP
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AC_MSG_RESULT(yes)
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;;
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*)
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STRIP_STATIC_LIB=:
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STRIP_SHARED_LIB=:
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AC_MSG_RESULT(no)
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;;
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esac
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fi
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AC_SUBST(STRIP_STATIC_LIB)
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AC_SUBST(STRIP_SHARED_LIB)
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])# PGAC_CHECK_STRIP
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