diff options
Diffstat (limited to 'gnulib-m4/assert_h.m4')
| -rw-r--r-- | gnulib-m4/assert_h.m4 | 81 |
1 files changed, 47 insertions, 34 deletions
diff --git a/gnulib-m4/assert_h.m4 b/gnulib-m4/assert_h.m4 index b90d0f19..b02cbd68 100644 --- a/gnulib-m4/assert_h.m4 +++ b/gnulib-m4/assert_h.m4 @@ -1,9 +1,10 @@ # assert_h.m4 -# serial 1 -dnl Copyright (C) 2011-2024 Free Software Foundation, Inc. +# serial 6 +dnl Copyright (C) 2011-2025 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. +dnl This file is offered as-is, without any warranty. dnl From Paul Eggert. @@ -12,30 +13,31 @@ AC_DEFUN([gl_ASSERT_H], AC_CACHE_CHECK([for static_assert], [gl_cv_static_assert], [gl_saved_CFLAGS=$CFLAGS for gl_working in "yes, a keyword" "yes, an <assert.h> macro"; do - AS_CASE([$gl_working], - [*assert.h*], [CFLAGS="$gl_saved_CFLAGS -DINCLUDE_ASSERT_H"]) - - AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM( - [[#if defined __clang__ && __STDC_VERSION__ < 202311 - #pragma clang diagnostic error "-Wc2x-extensions" - #pragma clang diagnostic error "-Wc++1z-extensions" - #endif - #ifdef INCLUDE_ASSERT_H - #include <assert.h> - #endif - static_assert (2 + 2 == 4, "arithmetic does not work"); - static_assert (2 + 2 == 4); - ]], - [[ - static_assert (sizeof (char) == 1, "sizeof does not work"); - static_assert (sizeof (char) == 1); - ]])], - [gl_cv_static_assert=$gl_working], - [gl_cv_static_assert=no]) - CFLAGS=$gl_saved_CFLAGS - test "$gl_cv_static_assert" != no && break - done]) + AS_CASE([$gl_working], + [*assert.h*], [CFLAGS="$gl_saved_CFLAGS -DINCLUDE_ASSERT_H"]) + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[#if defined __clang__ && __STDC_VERSION__ < 202311 + #pragma clang diagnostic error "-Wc2x-extensions" + #pragma clang diagnostic error "-Wc++1z-extensions" + #endif + #ifdef INCLUDE_ASSERT_H + #include <assert.h> + #endif + static_assert (2 + 2 == 4, "arithmetic does not work"); + static_assert (2 + 2 == 4); + ]], + [[ + static_assert (sizeof (char) == 1, "sizeof does not work"); + static_assert (sizeof (char) == 1); + ]]) + ], + [gl_cv_static_assert=$gl_working], + [gl_cv_static_assert=no]) + CFLAGS=$gl_saved_CFLAGS + test "$gl_cv_static_assert" != no && break + done + ]) GL_GENERATE_ASSERT_H=false AS_CASE([$gl_cv_static_assert], @@ -48,25 +50,36 @@ AC_DEFUN([gl_ASSERT_H], dnl The "zz" puts this toward config.h's end, to avoid potential dnl collisions with other definitions. + dnl Hardcode the known configuration results for GCC and clang, so that + dnl a configuration made with the C compiler works also with the C++ compiler + dnl and vice versa. + dnl The seemingly redundant parentheses are necessary for MSVC 14. dnl #undef assert so that programs are not tempted to use it without dnl specifically including assert.h. - dnl #undef __ASSERT_H__ so that on IRIX, when programs later include - dnl <assert.h>, this include actually defines assert. dnl Break the #undef_s apart with a comment so that 'configure' does dnl not comment them out. AH_VERBATIM([zzstatic_assert], -[#if (!defined HAVE_C_STATIC_ASSERT && !defined assert \ +[#if (!(defined __clang__ \ + ? (defined __cplusplus \ + ? __cplusplus >= 201703L \ + : __STDC_VERSION__ >= 202000L && __clang_major__ >= 16 \ + && !defined __sun) \ + : (defined __GNUC__ \ + ? (defined __cplusplus \ + ? __cplusplus >= 201103L && __GNUG__ >= 6 \ + : __STDC_VERSION__ >= 202000L && __GNUC__ >= 13 \ + && !defined __sun) \ + : defined HAVE_C_STATIC_ASSERT)) \ + && !defined assert \ && (!defined __cplusplus \ || (__cpp_static_assert < 201411 \ && __GNUG__ < 6 && __clang_major__ < 6))) #include <assert.h> #undef/**/assert - #ifdef __sgi - #undef/**/__ASSERT_H__ - #endif /* Solaris 11.4 <assert.h> defines static_assert as a macro with 2 arguments. - We need it also to be invocable with a single argument. */ - #if defined __sun && (__STDC_VERSION__ - 0 >= 201112L) && !defined __cplusplus + We need it also to be invocable with a single argument. + Haiku 2022 <assert.h> does not define static_assert at all. */ + #if (__STDC_VERSION__ - 0 >= 201112L) && !defined __cplusplus #undef/**/static_assert #define static_assert _Static_assert #endif |