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-rw-r--r--m4/attributes.m4216
1 files changed, 56 insertions, 160 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4
index 17d57fbeb..3fee49ab5 100644
--- a/m4/attributes.m4
+++ b/m4/attributes.m4
@@ -42,11 +42,8 @@ AC_DEFUN([CC_CHECK_CFLAGS_SILENT], [
CFLAGS="$ac_save_CFLAGS"
])
- if eval test [x$]AS_TR_SH([cc_cv_cflags_$1]) = xyes; then
- ifelse([$2], , [:], [$2])
- else
- ifelse([$3], , [:], [$3])
- fi
+ AS_IF([test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],
+ [$2], [$3])
])
AC_DEFUN([CC_CHECK_CFLAGS], [
@@ -55,11 +52,8 @@ AC_DEFUN([CC_CHECK_CFLAGS], [
CC_CHECK_CFLAGS_SILENT([$1]) dnl Don't execute actions here!
)
- if eval test [x$]AS_TR_SH([cc_cv_cflags_$1]) = xyes; then
- ifelse([$2], , [:], [$2])
- else
- ifelse([$3], , [:], [$3])
- fi
+ AS_IF([test x$]AS_TR_SH([cc_cv_cflags_$1])[ = xyes],
+ [$2], [$3])
])
AC_DEFUN([CC_CHECK_LDFLAGS], [
@@ -73,11 +67,8 @@ AC_DEFUN([CC_CHECK_LDFLAGS], [
LDFLAGS="$ac_save_LDFLAGS"
])
- if eval test [x$]AS_TR_SH([cc_cv_ldflags_$1]) = xyes; then
- ifelse([$2], , [:], [$2])
- else
- ifelse([$3], , [:], [$3])
- fi
+ AS_IF([test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes],
+ [$2], [$3])
])
dnl Check for a -Werror flag or equivalent. -Werror is the GCC
@@ -109,76 +100,69 @@ AC_DEFUN([CC_CHECK_ATTRIBUTE], [
CFLAGS="$ac_save_CFLAGS"
])
- if eval test [x$]AS_TR_SH([cc_cv_attribute_$1]) = xyes; then
- AC_DEFINE(AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1, [Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))])
- ifelse([$4], , [:], [$4])
- else
- ifelse([$5], , [:], [$5])
- fi
+ AS_IF([test x$]AS_TR_SH([cc_cv_attribute_$1])[ = xyes],
+ [AC_DEFINE(
+ AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1,
+ [Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))]
+ )
+ $4],
+ [$5])
])
AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
CC_CHECK_ATTRIBUTE(
[constructor],,
[void __attribute__((constructor)) ctor() { int a; }],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
CC_CHECK_ATTRIBUTE(
[format], [format(printf, n, n)],
[void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { fmt = (void *)0; }],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_FORMAT_ARG], [
CC_CHECK_ATTRIBUTE(
[format_arg], [format_arg(printf)],
[char *__attribute__((format_arg(1))) gettextlike(const char *fmt) { fmt = (void *)0; }],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
CC_CHECK_ATTRIBUTE(
[visibility_$1], [visibility("$1")],
[void __attribute__((visibility("$1"))) $1_function() { }],
- [$2],
- [$3])
+ [$2], [$3])
])
AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
CC_CHECK_ATTRIBUTE(
[nonnull], [nonnull()],
[void __attribute__((nonnull())) some_function(void *foo, void *bar) { foo = (void*)0; bar = (void*)0; }],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
CC_CHECK_ATTRIBUTE(
[unused], ,
[void some_function(void *foo, __attribute__((unused)) void *bar);],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [
CC_CHECK_ATTRIBUTE(
[sentinel], ,
[void some_function(void *foo, ...) __attribute__((sentinel));],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [
CC_CHECK_ATTRIBUTE(
[deprecated], ,
[void some_function(void *foo, ...) __attribute__((deprecated));],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_ALIAS], [
@@ -186,24 +170,28 @@ AC_DEFUN([CC_ATTRIBUTE_ALIAS], [
[alias], [weak, alias],
[void other_function(void *foo) { }
void some_function(void *foo) __attribute__((weak, alias("other_function")));],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_MALLOC], [
CC_CHECK_ATTRIBUTE(
[malloc], ,
[void * __attribute__((malloc)) my_alloc(int n);],
- [$1],
- [$2])
+ [$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_PACKED], [
CC_CHECK_ATTRIBUTE(
[packed], ,
[struct astructure { char a; int b; long c; void *d; } __attribute__((packed));],
- [$1],
- [$2])
+ [$1], [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_CONST], [
+ CC_CHECK_ATTRIBUTE(
+ [const], ,
+ [int __attribute__((const)) twopow(int n) { return 1 << n; } ],
+ [$1], [$2])
])
AC_DEFUN([CC_FLAG_VISIBILITY], [
@@ -217,39 +205,34 @@ AC_DEFUN([CC_FLAG_VISIBILITY], [
cc_cv_flag_visibility='no')
CFLAGS="$cc_flag_visibility_save_CFLAGS"])
- if test "x$cc_cv_flag_visibility" = "xyes"; then
- AC_DEFINE([SUPPORT_FLAG_VISIBILITY], 1, [Define this if the compiler supports the -fvisibility flag])
- ifelse([$1], , [:], [$1])
- else
- ifelse([$2], , [:], [$2])
- fi
+ AS_IF([test "x$cc_cv_flag_visibility" = "xyes"],
+ [AC_DEFINE([SUPPORT_FLAG_VISIBILITY], 1,
+ [Define this if the compiler supports the -fvisibility flag])
+ $1],
+ [$2])
])
AC_DEFUN([CC_FUNC_EXPECT], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler has __builtin_expect function],
- [cc_cv_func_expect],
- [AC_COMPILE_IFELSE([
- int some_function()
- {
- int a = 3;
- return (int)__builtin_expect(a, 3);
- }
- ],
- [cc_cv_func_expect=yes],
- [cc_cv_func_expect=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_func_expect" = "xyes"; then
- AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1, [Define this if the compiler supports __builtin_expect() function])
- $1
- else
- true
- $2
- fi
+ AC_REQUIRE([CC_CHECK_WERROR])
+ AC_CACHE_CHECK([if compiler has __builtin_expect function],
+ [cc_cv_func_expect],
+ [ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cc_cv_werror"
+ AC_COMPILE_IFELSE(
+ [int some_function() {
+ int a = 3;
+ return (int)__builtin_expect(a, 3);
+ }],
+ [cc_cv_func_expect=yes],
+ [cc_cv_func_expect=no])
+ CFLAGS="$ac_save_CFLAGS"
+ ])
+
+ AS_IF([test "x$cc_cv_func_expect" = "xyes"],
+ [AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1,
+ [Define this if the compiler supports __builtin_expect() function])
+ $1],
+ [$2])
])
AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
@@ -273,90 +256,3 @@ AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
[Define the highest alignment supported])
fi
])
-
-AC_DEFUN([CC_ATTRIBUTE_PACKED], [
- AC_REQUIRE([CC_CHECK_WERROR])
- AC_CACHE_CHECK([if $CC supports __attribute__((packed))],
- [cc_cv_attribute_packed],
- [ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_COMPILE_IFELSE([struct { char a; short b; int c; } __attribute__((packed)) foo;],
- [cc_cv_attribute_packed=yes],
- [cc_cv_attribute_packed=no])
- CFLAGS="$ac_save_CFLAGS"
- ])
-
- if test x$cc_cv_attribute_packed = xyes; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_PACKED], 1, [Define this if the compiler supports __attribute__((packed))])
- ifelse([$1], , [:], [$1])
- else
- ifelse([$2], , [:], [$2])
- fi
-])
-
-AC_DEFUN([CC_ATTRIBUTE_MALLOC], [
- AC_REQUIRE([CC_CHECK_WERROR])
- AC_CACHE_CHECK([if $CC supports __attribute__((__malloc__))],
- [cc_cv_attribute_malloc],
- [ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_COMPILE_IFELSE([void *fooalloc(int size) __attribute__((__malloc__));],
- [cc_cv_attribute_malloc=yes],
- [cc_cv_attribute_malloc=no])
- CFLAGS="$ac_save_CFLAGS"
- ])
-
- if test x$cc_cv_attribute_malloc = xyes; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_MALLOC], 1, [Define this if the compiler supports __attribute__((__malloc__))])
- ifelse([$1], , [:], [$1])
- else
- ifelse([$2], , [:], [$2])
- fi
-])
-
-
-dnl AC_C_ALWAYS_INLINE
-dnl Define inline to something appropriate, including the new always_inline
-dnl attribute from gcc 3.1
-dnl Thanks to Michel LESPINASSE <walken@zoy.org>
-dnl __inline__ "check" added by Darren Salt
-AC_DEFUN([AC_C_ALWAYS_INLINE], [
- AC_C_INLINE
- if test x"$GCC" = x"yes" -a x"$ac_cv_c_inline" = x"inline"; then
- AC_MSG_CHECKING([for always_inline])
- SAVE_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Wall -Werror"
- AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[inline __attribute__ ((__always_inline__)) void f (void);]])],
- [ac_cv_always_inline=yes],[ac_cv_always_inline=no])
- CFLAGS="$SAVE_CFLAGS"
- AC_MSG_RESULT([$ac_cv_always_inline])
- if test x"$ac_cv_always_inline" = x"yes"; then
- AH_TOP([
-#ifdef inline
-/* the strange formatting below is needed to prevent config.status from rewriting it */
-# undef \
- inline
-#endif
- ])
- AC_DEFINE_UNQUOTED([inline],[inline __attribute__ ((__always_inline__))])
- fi
- ac_cv_c___inline__=''
- else
- # FIXME: test the compiler to see if it supports __inline__
- # instead of assuming that if it isn't gcc, it doesn't
- case "$ac_cv_c_inline" in
- yes)
- ac_cv_c___inline__=inline
- ;;
- inline|__inline__)
- ac_cv_c___inline__=''
- ;;
- *)
- ac_cv_c___inline__="$ac_cv_c_inline"
- ;;
- esac
- fi
- if test x"$ac_cv_c___inline__" != x; then
- AC_DEFINE_UNQUOTED([__inline__],[$ac_cv_c___inline__],[Define if the compiler doesn't recognise __inline__])
- fi
-])
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-01 18:16:39 +0000