diff options
Diffstat (limited to 'config/perl.m4')
| -rw-r--r-- | config/perl.m4 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/config/perl.m4 b/config/perl.m4 index bed2eae57fe..9706c4de6ac 100644 --- a/config/perl.m4 +++ b/config/perl.m4 @@ -49,6 +49,31 @@ 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 $Config{ccflags}. We don't really need +# anything except -D switches, and other sorts of compiler switches can +# actively break things if Perl was compiled with a different compiler. +# Moreover, although Perl likes to put stuff like -D_LARGEFILE_SOURCE and +# -D_FILE_OFFSET_BITS=64 here, it would be fatal to try to compile PL/Perl +# to a different libc ABI than core Postgres uses. The available information +# says that all the symbols that affect Perl's own ABI begin with letters, +# so it should be sufficient to adopt -D switches for symbols not beginning +# with underscore. +# For debugging purposes, let's have the configure output report the raw +# ccflags value as well as the set of flags we chose to adopt. +AC_DEFUN([PGAC_CHECK_PERL_EMBED_CCFLAGS], +[AC_REQUIRE([PGAC_PATH_PERL]) +AC_MSG_CHECKING([for CFLAGS recommended by Perl]) +perl_ccflags=`$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[^_]/)}']` +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 |