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1c1a572d05
Commits5a5c2feca3andb5178c5d08introduced support for modern MSVC-built, 32-bit Perl, but they broke use of MinGW-built, 32-bit Perl distributions like Strawberry Perl and modern ActivePerl. Perl has no robust means to report whether it expects a -D_USE_32BIT_TIME_T ABI, so test this. Back-patch to 9.3 (all supported versions). The chief alternative was a heuristic of adding -D_USE_32BIT_TIME_T when $Config{gccversion} is nonempty. That banks on every gcc-built Perl using the same ABI. gcc could change its default ABI the way MSVC once did, and one could build Perl with gcc and the non-default ABI. The GNU make build system could benefit from a similar test, without which it does not support MSVC-built Perl. For now, just add a comment. Most users taking the special step of building Perl with MSVC probably build PostgreSQL with MSVC. Discussion: https://postgr.es/m/20171130041441.GA3161526@rfd.leadboat.com
117 lines
4.7 KiB
Plaintext
117 lines
4.7 KiB
Plaintext
# config/perl.m4
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# PGAC_PATH_PERL
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# --------------
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AC_DEFUN([PGAC_PATH_PERL],
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[# Let the user override the search
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if test -z "$PERL"; then
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AC_PATH_PROG(PERL, perl)
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fi
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if test "$PERL"; then
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pgac_perl_version=`$PERL -v 2>/dev/null | sed -n ['s/This is perl.*v[a-z ]*\([0-9]\.[0-9][0-9.]*\).*$/\1/p']`
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AC_MSG_NOTICE([using perl $pgac_perl_version])
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if echo "$pgac_perl_version" | sed ['s/[.a-z_]/ /g'] | \
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$AWK '{ if ([$]1 == 5 && [$]2 >= 8) exit 1; else exit 0;}'
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then
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AC_MSG_WARN([
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*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
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*** Perl version 5.8 or later is required, but this is $pgac_perl_version.])
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PERL=""
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fi
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fi
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if test -z "$PERL"; then
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AC_MSG_WARN([
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*** Without Perl you will not be able to build PostgreSQL from Git.
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*** You can obtain Perl from any CPAN mirror site.
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*** (If you are using the official distribution of PostgreSQL then you do not
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*** need to worry about this, because the Perl output is pre-generated.)])
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fi
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])# PGAC_PATH_PERL
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# PGAC_CHECK_PERL_CONFIG(NAME)
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# ----------------------------
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AC_DEFUN([PGAC_CHECK_PERL_CONFIG],
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[AC_REQUIRE([PGAC_PATH_PERL])
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AC_MSG_CHECKING([for Perl $1])
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perl_$1=`$PERL -MConfig -e 'print $Config{$1}'`
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test "$PORTNAME" = "win32" && perl_$1=`echo $perl_$1 | sed 's,\\\\,/,g'`
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AC_SUBST(perl_$1)dnl
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AC_MSG_RESULT([$perl_$1])])
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# PGAC_CHECK_PERL_CONFIGS(NAMES)
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# ------------------------------
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AC_DEFUN([PGAC_CHECK_PERL_CONFIGS],
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[m4_foreach([pgac_item], [$1], [PGAC_CHECK_PERL_CONFIG(pgac_item)])])
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# PGAC_CHECK_PERL_EMBED_CCFLAGS
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# -----------------------------
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# We selectively extract stuff from $Config{ccflags}. For debugging purposes,
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# let's have the configure output report the raw ccflags value as well as the
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# set of flags we chose to adopt. We don't really need anything except -D
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# switches, and other sorts of compiler switches can actively break things if
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# Perl was compiled with a different compiler. Moreover, although Perl likes
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# to put stuff like -D_LARGEFILE_SOURCE and -D_FILE_OFFSET_BITS=64 here, it
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# would be fatal to try to compile PL/Perl to a different libc ABI than core
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# Postgres uses. The available information says that most symbols that affect
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# Perl's own ABI begin with letters, so it's almost sufficient to adopt -D
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# switches for symbols not beginning with underscore. Some exceptions are the
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# Windows-specific -D_USE_32BIT_TIME_T and -D__MINGW_USE_VC2005_COMPAT; see
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# Mkvcbuild.pm for details. We absorb the former when Perl reports it. Perl
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# never reports the latter, and we don't attempt to deduce when it's needed.
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# Consequently, we don't support using MinGW to link to MSVC-built Perl. As
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# of 2017, all supported ActivePerl and Strawberry Perl are MinGW-built. If
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# that changes or an MSVC-built Perl distribution becomes prominent, we can
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# revisit this limitation.
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AC_DEFUN([PGAC_CHECK_PERL_EMBED_CCFLAGS],
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[AC_REQUIRE([PGAC_PATH_PERL])
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AC_MSG_CHECKING([for CFLAGS recommended by Perl])
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perl_ccflags=`$PERL -MConfig -e ['print $Config{ccflags}']`
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AC_MSG_RESULT([$perl_ccflags])
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AC_MSG_CHECKING([for CFLAGS to compile embedded Perl])
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perl_embed_ccflags=`$PERL -MConfig -e ['foreach $f (split(" ",$Config{ccflags})) {print $f, " " if ($f =~ /^-D[^_]/ || $f =~ /^-D_USE_32BIT_TIME_T/)}']`
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AC_SUBST(perl_embed_ccflags)dnl
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AC_MSG_RESULT([$perl_embed_ccflags])
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])# PGAC_CHECK_PERL_EMBED_CCFLAGS
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# PGAC_CHECK_PERL_EMBED_LDFLAGS
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# -----------------------------
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# We are after Embed's ldopts, but without the subset mentioned in
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# Config's ccdlflags; and also without any -arch flags, which recent
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# Apple releases put in unhelpfully. (If you want a multiarch build
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# you'd better be specifying it in more places than plperl's final link.)
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AC_DEFUN([PGAC_CHECK_PERL_EMBED_LDFLAGS],
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[AC_REQUIRE([PGAC_PATH_PERL])
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AC_MSG_CHECKING(for flags to link embedded Perl)
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if test "$PORTNAME" = "win32" ; then
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perl_lib=`basename $perl_archlibexp/CORE/perl[[5-9]]*.lib .lib`
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if test -e "$perl_archlibexp/CORE/$perl_lib.lib"; then
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perl_embed_ldflags="-L$perl_archlibexp/CORE -l$perl_lib"
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else
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perl_lib=`basename $perl_archlibexp/CORE/libperl[[5-9]]*.a .a | sed 's/^lib//'`
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if test -e "$perl_archlibexp/CORE/lib$perl_lib.a"; then
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perl_embed_ldflags="-L$perl_archlibexp/CORE -l$perl_lib"
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fi
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fi
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else
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pgac_tmp1=`$PERL -MExtUtils::Embed -e ldopts`
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pgac_tmp2=`$PERL -MConfig -e 'print $Config{ccdlflags}'`
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perl_embed_ldflags=`echo X"$pgac_tmp1" | sed -e "s/^X//" -e "s%$pgac_tmp2%%" -e ["s/ -arch [-a-zA-Z0-9_]*//g"]`
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fi
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AC_SUBST(perl_embed_ldflags)dnl
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if test -z "$perl_embed_ldflags" ; then
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AC_MSG_RESULT(no)
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AC_MSG_ERROR([could not determine flags for linking embedded Perl.
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This probably means that ExtUtils::Embed or ExtUtils::MakeMaker is not
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installed.])
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else
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AC_MSG_RESULT([$perl_embed_ldflags])
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fi
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])# PGAC_CHECK_PERL_EMBED_LDFLAGS
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