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b21c569cea
Peter Eisentraut noted that commit 40b9f1921 had broken a configure
behavior that some people might rely on: AC_CHECK_PROGS(FOO,...) will
allow the search to be overridden by specifying a value for FOO on
configure's command line or in its environment, but AC_PATH_PROGS(FOO,...)
accepts such an override only if it's an absolute path. We had worked
around that behavior for some, but not all, of the pre-existing uses
of AC_PATH_PROGS by just skipping the macro altogether when FOO is
already set. Let's standardize on that workaround for all uses of
AC_PATH_PROGS, new and pre-existing, by wrapping AC_PATH_PROGS in a
new macro PGAC_PATH_PROGS. While at it, fix a deficiency of the old
workaround code by making sure we report the setting to configure's log.
Eventually I'd like to improve PGAC_PATH_PROGS so that it converts
non-absolute override inputs to absolute form, eg "PYTHON=python3"
becomes, say, PYTHON = /usr/bin/python3. But that will take some
nontrivial coding so it doesn't seem like a thing to do in late beta.
Discussion: https://postgr.es/m/90a92a7d-938e-507a-3bd7-ecd2b4004689@2ndquadrant.com
101 lines
3.9 KiB
Plaintext
101 lines
3.9 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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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 $Config{ccflags}. We don't really need
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# anything except -D switches, and other sorts of compiler switches can
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# actively break things if Perl was compiled with a different compiler.
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# Moreover, although Perl likes to put stuff like -D_LARGEFILE_SOURCE and
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# -D_FILE_OFFSET_BITS=64 here, it would be fatal to try to compile PL/Perl
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# to a different libc ABI than core Postgres uses. The available information
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# says that all the symbols that affect Perl's own ABI begin with letters,
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# so it should be sufficient to adopt -D switches for symbols not beginning
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# with underscore.
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# For debugging purposes, let's have the configure output report the raw
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# ccflags value as well as the set of flags we chose to adopt.
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AC_DEFUN([PGAC_CHECK_PERL_EMBED_CCFLAGS],
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[AC_REQUIRE([PGAC_PATH_PERL])
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AC_MSG_CHECKING([for CFLAGS recommended by Perl])
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perl_ccflags=`$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[^_]/)}']`
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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 $perl_archlibexp/CORE/perl[[5-9]]*.lib .lib`
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test -e "$perl_archlibexp/CORE/$perl_lib.lib" && perl_embed_ldflags="-L$perl_archlibexp/CORE -l$perl_lib"
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else
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pgac_tmp1=`$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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