+2024-04-27 Paul Eggert <eggert@cs.ucla.edu>
+
+ nullptr: work around GCC 14 nullptr sentinel bug
+ * m4/nullptr.m4 (gl_NULLPTR): Work around GCC bug 114780.
+
2024-04-27 Paul Eggert <eggert@cs.ucla.edu>
stddef: work around a GCC 14 stddef.h bug
AC_CACHE_CHECK([for C nullptr], [gl_cv_c_nullptr],
[AC_COMPILE_IFELSE(
[AC_LANG_SOURCE([[int *p = nullptr;]])],
- [gl_cv_c_nullptr=yes],
+ [gl_cv_c_nullptr=yes
+ # Work around <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114780>.
+ gl_saved_CFLAGS=$CFLAGS
+ CFLAGS="$CFLAGS -Wall -Werror"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[void f (char const *, ...) __attribute__ ((sentinel));]],
+ [[f ("", nullptr);]])],
+ [],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[void f (char const *, ...) __attribute__ ((sentinel));]],
+ [[f ("", (void *) 0);]])],
+ [gl_cv_c_nullptr='not as a sentinel'])])
+ CFLAGS=$gl_saved_CFLAGS],
[gl_cv_c_nullptr=no])])
gl_c_nullptr=$gl_cv_c_nullptr
AC_LANG_POP([C])],