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Give ICC its preferred, documented form of the no-strict-aliasing

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switch, viz '-fno-alias'.  Since we have a separate code path here
anyway, it's just as easy to cooperate.
This commit is contained in:
Tom Lane 2007-09-11 19:50:25 +00:00
parent 16f8a9e4e1
commit 861f7357b9
2 changed files with 7 additions and 7 deletions
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8
configure vendored
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@ -3120,11 +3120,11 @@ echo "${ECHO_T}no" >&6
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
# Not clear if this is needed, but seems like a good idea
echo "$as_me:$LINENO: checking if $CC supports -fno-strict-aliasing" >&5
echo $ECHO_N "checking if $CC supports -fno-strict-aliasing... $ECHO_C" >&6
# ICC prefers to spell the no-strict-aliasing switch like this
echo "$as_me:$LINENO: checking if $CC supports -fno-alias" >&5
echo $ECHO_N "checking if $CC supports -fno-alias... $ECHO_C" >&6
pgac_save_CFLAGS=$CFLAGS
CFLAGS="$pgac_save_CFLAGS -fno-strict-aliasing"
CFLAGS="$pgac_save_CFLAGS -fno-alias"
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF

6
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 1.524 2007/08/20 08:53:12 petere Exp $
dnl $PostgreSQL: pgsql/configure.in,v 1.525 2007/09/11 19:50:25 tgl Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
@ -291,8 +291,8 @@ elif test "$ICC" = yes; then
# Intel's compiler has a bug/misoptimization in checking for
# division by NAN (NaN == 0), -mp1 fixes it, so add it to the CFLAGS.
PGAC_PROG_CC_CFLAGS_OPT([-mp1])
# Not clear if this is needed, but seems like a good idea
PGAC_PROG_CC_CFLAGS_OPT([-fno-strict-aliasing])
# ICC prefers to spell the no-strict-aliasing switch like this
PGAC_PROG_CC_CFLAGS_OPT([-fno-alias])
elif test x"${CC}" = x"xlc"; then
# AIX xlc has to have strict aliasing turned off too
PGAC_PROG_CC_CFLAGS_OPT([-qnoansialias])