+2012-12-26 Paul Eggert <eggert@cs.ucla.edu>
+
+ Revert static checking of stack smashing.
+ * configure.ac (WARN_CFLAGS): Omit -Wstack-protector when
+ configured with --enable-gcc-warnings. -Wstack-protector causes
+ diagnostics to be issued on Ubuntu 12.10 x86-64.
+
2012-12-24 Paul Eggert <eggert@cs.ucla.edu>
Merge from gnulib, incorporating:
# <http://lists.gnu.org/archive/html/emacs-diffs/2011-11/msg00265.html>.
nw="$nw -Wshadow"
+ # Emacs's use of alloca inhibits protecting the stack.
+ nw="$nw -Wstack-protector"
+
# The following line should be removable at some point.
nw="$nw -Wsuggest-attribute=pure"
- AC_MSG_CHECKING([whether to use -Wstack-protector])
- AC_PREPROC_IFELSE(
- [AC_LANG_PROGRAM(
- [[#if (1 <= __LONG_MAX__ >> 31 >> 31 \
- && 4 < __GNUC__ + (7 < __GNUC_MINOR__ + (2 <= __GNUC_PATCHLEVEL__)))
- /* OK */
- #else
- #error "Not GCC, or GCC before 4.7.2, or 'long int' has < 64 bits."
- #endif
- ]])],
- [AC_MSG_RESULT(yes)],
- [AC_MSG_RESULT(no)
- nw="$nw -Wstack-protector"])
-
gl_MANYWARN_ALL_GCC([ws])
gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
for w in $ws; do