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A PostgreSQL release tarball contains a number of prebuilt files, in particular files produced by bison, flex, perl, and well as html and man documentation. We have done this consistent with established practice at the time to not require these tools for building from a tarball. Some of these tools were hard to get, or get the right version of, from time to time, and shipping the prebuilt output was a convenience to users. Now this has at least two problems: One, we have to make the build system(s) work in two modes: Building from a git checkout and building from a tarball. This is pretty complicated, but it works so far for autoconf/make. It does not currently work for meson; you can currently only build with meson from a git checkout. Making meson builds work from a tarball seems very difficult or impossible. One particular problem is that since meson requires a separate build directory, we cannot make the build update files like gram.h in the source tree. So if you were to build from a tarball and update gram.y, you will have a gram.h in the source tree and one in the build tree, but the way things work is that the compiler will always use the one in the source tree. So you cannot, for example, make any gram.y changes when building from a tarball. This seems impossible to fix in a non-horrible way. Second, there is increased interest nowadays in precisely tracking the origin of software. We can reasonably track contributions into the git tree, and users can reasonably track the path from a tarball to packages and downloads and installs. But what happens between the git tree and the tarball is obscure and in some cases non-reproducible. The solution for both of these issues is to get rid of the step that adds prebuilt files to the tarball. The tarball now only contains what is in the git tree (*). Getting the additional build dependencies is no longer a problem nowadays, and the complications to keep these dual build modes working are significant. And of course we want to get the meson build system working universally. This commit removes the make distprep target altogether. The make dist target continues to do its job, it just doesn't call distprep anymore. (*) - The tarball also contains the INSTALL file that is built at make dist time, but not by distprep. This is unchanged for now. The make maintainer-clean target, whose job it is to remove the prebuilt files in addition to what make distclean does, is now just an alias to make distprep. (In practice, it is probably obsolete given that git clean is available.) The following programs are now hard build requirements in configure (they were already required by meson.build): - bison - flex - perl Reviewed-by: Michael Paquier <michael@paquier.xyz> Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://www.postgresql.org/message-id/flat/e07408d9-e5f2-d9fd-5672-f53354e9305e@eisentraut.org
110 lines
4.4 KiB
Plaintext
110 lines
4.4 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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[PGAC_PATH_PROGS(PERL, perl)
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AC_ARG_VAR(PERL, [Perl program])dnl
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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 >= 14)) exit 1; else exit 0;}'
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then
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AC_MSG_ERROR([
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*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
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*** Perl version 5.14 or later is required, but this is $pgac_perl_version.])
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fi
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fi
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if test -z "$PERL"; then
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AC_MSG_ERROR([Perl not found])
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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 ldflags. (Those are the choices of those who
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# built the Perl installation, which are not necessarily appropriate
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# for building PostgreSQL.)
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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} $Config{ldflags}"'`
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perl_embed_ldflags=`echo X"$pgac_tmp1" | sed -e "s/^X//" -e "s%$pgac_tmp2%%"`
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fi
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AC_SUBST(perl_embed_ldflags)dnl
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if test -z "$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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