diff options
| -rwxr-xr-x | configure | 54 | ||||
| -rw-r--r-- | configure.in | 4 |
2 files changed, 57 insertions, 1 deletions
diff --git a/configure b/configure index 2de0049ba74..3dbd0ed2227 100755 --- a/configure +++ b/configure @@ -2991,6 +2991,60 @@ echo "${ECHO_T}no" >&6 fi rm -f conftest.err conftest.$ac_objext conftest.$ac_ext + # Disable optimizations that assume no overflow; needed for gcc 4.3+ + echo "$as_me:$LINENO: checking if $CC supports -fwrapv" >&5 +echo $ECHO_N "checking if $CC supports -fwrapv... $ECHO_C" >&6 +pgac_save_CFLAGS=$CFLAGS +CFLAGS="$pgac_save_CFLAGS -fwrapv" +cat >conftest.$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 + elif test x"${CC}" = x"xlc"; then # AIX xlc has to have strict aliasing turned off too echo "$as_me:$LINENO: checking if $CC supports -qnoansialias" >&5 diff --git a/configure.in b/configure.in index 7307cc8a04e..faae467564d 100644 --- a/configure.in +++ b/configure.in @@ -1,5 +1,5 @@ dnl Process this file with autoconf to produce a configure script. -dnl $PostgreSQL: pgsql/configure.in,v 1.431.2.23 2008/02/24 05:22:22 tgl Exp $ +dnl $PostgreSQL: pgsql/configure.in,v 1.431.2.24 2008/03/10 21:50:40 tgl Exp $ dnl dnl Developers, please strive to achieve this order: dnl @@ -278,6 +278,8 @@ choke me # Disable strict-aliasing rules; needed for gcc 3.3+ PGAC_PROG_CC_CFLAGS_OPT([-fno-strict-aliasing]) + # Disable optimizations that assume no overflow; needed for gcc 4.3+ + PGAC_PROG_CC_CFLAGS_OPT([-fwrapv]) elif test x"${CC}" = x"xlc"; then # AIX xlc has to have strict aliasing turned off too PGAC_PROG_CC_CFLAGS_OPT([-qnoansialias]) |