postgresql/config/perl.m4
Michael Paquier 1301c80b21 Remove MSVC scripts
This commit removes all the scripts located in src/tools/msvc/ to build
PostgreSQL with Visual Studio on Windows, meson becoming the recommended
way to achieve that.  The scripts held some information that is still
relevant with meson, information kept and moved to better locations.
Comments that referred directly to the scripts are removed.

All the documentation still relevant that was in install-windows.sgml
has been moved to installation.sgml under a new subsection for Visual.
All the content specific to the scripts is removed.  Some adjustments
for the documentation are planned in a follow-up set of changes.

Author: Michael Paquier
Reviewed-by: Peter Eisentraut, Andres Freund
Discussion: https://postgr.es/m/ZQzp_VMJcerM1Cs_@paquier.xyz
2023-12-20 09:44:37 +09:00

117 lines
4.6 KiB
Plaintext

# config/perl.m4
# PGAC_PATH_PERL
# --------------
AC_DEFUN([PGAC_PATH_PERL],
[PGAC_PATH_PROGS(PERL, perl)
AC_ARG_VAR(PERL, [Perl program])dnl
if test "$PERL"; then
pgac_perl_version=`$PERL -v 2>/dev/null | sed -n ['s/This is perl.*v[a-z ]*\([0-9]\.[0-9][0-9.]*\).*$/\1/p']`
AC_MSG_NOTICE([using perl $pgac_perl_version])
if echo "$pgac_perl_version" | sed ['s/[.a-z_]/ /g'] | \
$AWK '{ if ([$]1 == 5 && ([$]2 >= 14)) exit 1; else exit 0;}'
then
AC_MSG_ERROR([
*** The installed version of Perl, $PERL, is too old to use with PostgreSQL.
*** Perl version 5.14 or later is required, but this is $pgac_perl_version.])
fi
fi
if test -z "$PERL"; then
AC_MSG_ERROR([Perl not found])
fi
])# PGAC_PATH_PERL
# PGAC_CHECK_PERL_CONFIG(NAME)
# ----------------------------
AC_DEFUN([PGAC_CHECK_PERL_CONFIG],
[AC_REQUIRE([PGAC_PATH_PERL])
AC_MSG_CHECKING([for Perl $1])
perl_$1=`$PERL -MConfig -e 'print $Config{$1}'`
test "$PORTNAME" = "win32" && perl_$1=`echo $perl_$1 | sed 's,\\\\,/,g'`
AC_SUBST(perl_$1)dnl
AC_MSG_RESULT([$perl_$1])])
# PGAC_CHECK_PERL_CONFIGS(NAMES)
# ------------------------------
AC_DEFUN([PGAC_CHECK_PERL_CONFIGS],
[m4_foreach([pgac_item], [$1], [PGAC_CHECK_PERL_CONFIG(pgac_item)])])
# PGAC_CHECK_PERL_EMBED_CCFLAGS
# -----------------------------
# We selectively extract stuff from $Config{ccflags}. For debugging purposes,
# let's have the configure output report the raw ccflags value as well as the
# set of flags we chose to adopt. We don't really need anything except -D
# switches, and other sorts of compiler switches can actively break things if
# Perl was compiled with a different compiler. Moreover, although Perl likes
# to put stuff like -D_LARGEFILE_SOURCE and -D_FILE_OFFSET_BITS=64 here, it
# would be fatal to try to compile PL/Perl to a different libc ABI than core
# Postgres uses. The available information says that most symbols that affect
# Perl's own ABI begin with letters, so it's almost sufficient to adopt -D
# switches for symbols not beginning with underscore.
# Some exceptions are the Windows-specific -D_USE_32BIT_TIME_T and
# -D__MINGW_USE_VC2005_COMPAT. To be exact, Windows offers several 32-bit ABIs.
# Perl is sensitive to sizeof(time_t), one of the ABI dimensions. PostgreSQL
# doesn't support building with pre-MSVC-2005 compilers, but it does support
# linking to Perl built with such a compiler. MSVC-built Perl 5.13.4 and
# later report -D_USE_32BIT_TIME_T in $Config{ccflags} if applicable, but
# MinGW-built Perl never reports -D_USE_32BIT_TIME_T despite typically needing
# it.
#
# Consequently, we don't support using MinGW to link to MSVC-built Perl. As
# of 2017, all supported ActivePerl and Strawberry Perl are MinGW-built. If
# that changes or an MSVC-built Perl distribution becomes prominent, we can
# revisit this limitation.
AC_DEFUN([PGAC_CHECK_PERL_EMBED_CCFLAGS],
[AC_REQUIRE([PGAC_PATH_PERL])
AC_MSG_CHECKING([for CFLAGS recommended by Perl])
perl_ccflags=`$PERL -MConfig -e ['print $Config{ccflags}']`
AC_MSG_RESULT([$perl_ccflags])
AC_MSG_CHECKING([for CFLAGS to compile embedded Perl])
perl_embed_ccflags=`$PERL -MConfig -e ['foreach $f (split(" ",$Config{ccflags})) {print $f, " " if ($f =~ /^-D[^_]/ || $f =~ /^-D_USE_32BIT_TIME_T/)}']`
AC_SUBST(perl_embed_ccflags)dnl
AC_MSG_RESULT([$perl_embed_ccflags])
])# PGAC_CHECK_PERL_EMBED_CCFLAGS
# PGAC_CHECK_PERL_EMBED_LDFLAGS
# -----------------------------
# We are after Embed's ldopts, but without the subset mentioned in
# Config's ccdlflags and ldflags. (Those are the choices of those who
# built the Perl installation, which are not necessarily appropriate
# for building PostgreSQL.)
AC_DEFUN([PGAC_CHECK_PERL_EMBED_LDFLAGS],
[AC_REQUIRE([PGAC_PATH_PERL])
AC_MSG_CHECKING(for flags to link embedded Perl)
if test "$PORTNAME" = "win32" ; then
perl_lib=`basename $perl_archlibexp/CORE/perl[[5-9]]*.lib .lib`
if test -e "$perl_archlibexp/CORE/$perl_lib.lib"; then
perl_embed_ldflags="-L$perl_archlibexp/CORE -l$perl_lib"
else
perl_lib=`basename $perl_archlibexp/CORE/libperl[[5-9]]*.a .a | sed 's/^lib//'`
if test -e "$perl_archlibexp/CORE/lib$perl_lib.a"; then
perl_embed_ldflags="-L$perl_archlibexp/CORE -l$perl_lib"
fi
fi
else
pgac_tmp1=`$PERL -MExtUtils::Embed -e ldopts`
pgac_tmp2=`$PERL -MConfig -e 'print "$Config{ccdlflags} $Config{ldflags}"'`
perl_embed_ldflags=`echo X"$pgac_tmp1" | sed -e "s/^X//" -e "s%$pgac_tmp2%%"`
fi
AC_SUBST(perl_embed_ldflags)dnl
if test -z "$perl_embed_ldflags" ; then
AC_MSG_RESULT(no)
AC_MSG_ERROR([could not determine flags for linking embedded Perl.
This probably means that ExtUtils::Embed or ExtUtils::MakeMaker is not
installed.])
else
AC_MSG_RESULT([$perl_embed_ldflags])
fi
])# PGAC_CHECK_PERL_EMBED_LDFLAGS