+2025-04-08 Bruno Haible <bruno@clisp.org>
+
+ stddef-h: Make a configure test work with upcoming GCC 15.
+ * m4/stddef_h.m4 (gl_STDDEF_H): Replace test "for clean definition" with
+ one that succeeds in GCC 15.
+
2025-04-07 Bruno Haible <bruno@clisp.org>
stdioext: Update comments regarding Haiku.
# stddef_h.m4
-# serial 17
-dnl Copyright (C) 2009-2024 Free Software Foundation, Inc.
+# serial 19
+dnl Copyright (C) 2009-2025 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
GL_GENERATE_STDDEF_H=true
fi
- AC_CACHE_CHECK([for clean definition of __STDC_VERSION_STDDEF_H__],
- [gl_cv_clean_version_stddef],
- [AC_PREPROC_IFELSE(
- [AC_LANG_SOURCE(
- [[/* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114870 */
- #include <stddef.h>
- #undef __STDC_VERSION_STDDEF_H__
- #include <time.h>
- #ifdef __STDC_VERSION_STDDEF_H__
- # error "<time.h> defines __STDC_VERSION_STDDEF_H__"
- #endif
- ]])],
- [gl_cv_clean_version_stddef=yes],
- [gl_cv_clean_version_stddef=no])])
- if test "$gl_cv_clean_version_stddef" = no; then
- STDDEF_NOT_IDEMPOTENT=1
- GL_GENERATE_STDDEF_H=true
- fi
+ dnl https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114870
+ dnl affects GCC 13 and 14.
+ AC_CACHE_CHECK([whether <stddef.h> is idempotent],
+ [gl_cv_stddef_idempotent],
+ [AC_COMPILE_IFELSE([AC_LANG_SOURCE(
+ [[
+ #if __GNUC__ == 13 || __GNUC__ == 14
+ #error "bug 114870 is present"
+ #endif
+ ]])],
+ [gl_cv_stddef_idempotent="guessing yes"],
+ [gl_cv_stddef_idempotent="guessing no"])
+ ])
+ case "$gl_cv_stddef_idempotent" in
+ *yes) ;;
+ *) STDDEF_NOT_IDEMPOTENT=1
+ GL_GENERATE_STDDEF_H=true
+ ;;
+ esac
if $GL_GENERATE_STDDEF_H; then
gl_NEXT_HEADERS([stddef.h])