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Turn off strict aliasing when using AIX xlc compiler. 

autoconf run.
This commit is contained in:
Bruce Momjian 2006-04-27 14:27:04 +00:00
parent 203592dd88
commit 0a6990e4dc
2 changed files with 60 additions and 3 deletions
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58
configure vendored
View File

@ -2715,8 +2715,7 @@ fi
# The Intel compiler on Linux supports most gcc options, but not
# all of them, so only add these options if we are really using
# gcc. Intel compiler has a bug in checking for division by NAN
# (NaN == 0), -mp1 fixes it, so someday we might way to add it.
# gcc.
if test "$GCC" = yes; then
@ -2934,6 +2933,61 @@ echo "${ECHO_T}no" >&6
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
elif test ${CC} = "xlc"; then
# AIX xlc has to have strict aliasing turned off too
echo "$as_me:$LINENO: checking if $CC supports -qnoansialias" >&5
echo $ECHO_N "checking if $CC supports -qnoansialias... $ECHO_C" >&6
pgac_save_CFLAGS=$CFLAGS
CFLAGS="$pgac_save_CFLAGS -qnoansialias"
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
(eval $ac_compile) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest.$ac_objext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
CFLAGS="$pgac_save_CFLAGS"
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
fi
# supply -g if --enable-debug

5
configure.in
View File

@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
dnl $PostgreSQL: pgsql/configure.in,v 1.460 2006/04/22 00:29:41 momjian Exp $
dnl $PostgreSQL: pgsql/configure.in,v 1.461 2006/04/27 14:27:04 momjian Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
@ -267,6 +267,9 @@ choke me
# Disable strict-aliasing rules; needed for gcc 3.3+
PGAC_PROG_CC_CFLAGS_OPT([-fno-strict-aliasing])
elif test ${CC} = "xlc"; then
# AIX xlc has to have strict aliasing turned off too
PGAC_PROG_CC_CFLAGS_OPT([-qnoansialias])
fi
# supply -g if --enable-debug