nw="$nw -Wfloat-equal" # warns about high-quality code
nw="$nw -Winline" # OK to ignore 'inline'
nw="$nw -Wjump-misses-init" # We sometimes safely jump over init.
+ nw="$nw -Wstrict-overflow" # OK to optimize assuming that
+ # signed overflow has undefined behavior
nw="$nw -Wsync-nand" # irrelevant here, and provokes ObjC warning
nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
# <http://lists.gnu.org/archive/html/emacs-diffs/2011-11/msg00265.html>.
nw="$nw -Wshadow"
- # The following lines should be removable at some point.
- nw="$nw -Wstack-protector"
- nw="$nw -Wstrict-overflow"
+ # The following line should be removable at some point.
nw="$nw -Wsuggest-attribute=pure"
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to use -Wstack-protector" >&5
+$as_echo_n "checking whether to use -Wstack-protector... " >&6; }
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if (1 <= __LONG_MAX__ >> 31 >> 31 \
+ && 4 < __GNUC__ + (7 < __GNUC_MINOR__ + (2 <= __GNUC_PATCHLEVEL__)))
+ /* OK */
+ #else
+ #error "Not GCC, or GCC before 4.7.2, or 'long int' has < 64 bits."
+ #endif
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+ nw="$nw -Wstack-protector"
+fi
+rm -f conftest.err conftest.$ac_ext
+
if test -n "$GCC"; then