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-rw-r--r--m4/attributes.m4276
1 files changed, 82 insertions, 194 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4
index a74280696..436c36b87 100644
--- a/m4/attributes.m4
+++ b/m4/attributes.m4
@@ -65,94 +65,99 @@ AC_DEFUN([CC_CHECK_WERROR], [
])
])
+AC_DEFUN([CC_CHECK_ATTRIBUTE], [
+ AC_REQUIRE([CC_CHECK_WERROR])
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cc_cv_werror"
+ AC_CACHE_CHECK([if $CC supports __attribute__(( ifelse([$2], , [$1], [$2]) ))],
+ AS_TR_SH([cc_cv_attribute_$1]),
+ [ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS $cc_cv_werror"
+ AC_COMPILE_IFELSE([$3],
+ [eval "AS_TR_SH([cc_cv_attribute_$1])='yes'"],
+ [eval "AS_TR_SH([cc_cv_attribute_$1])='no'"])
+ CFLAGS="$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], , [:], [$5])
+ fi
+])
+
AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler supports __attribute__((constructor))],
- [cc_cv_attribute_constructor],
- [AC_COMPILE_IFELSE([
- void ctor() __attribute__((constructor));
- void ctor() { int a; };
- ],
- [cc_cv_attribute_constructor=yes],
- [cc_cv_attribute_constructor=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_attribute_constructor" = "xyes"; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_CONSTRUCTOR], 1, [Define this if the compiler supports the constructor attribute])
- $1
- else
- true
- $2
- fi
+ CC_CHECK_ATTRIBUTE(
+ [constructor],,
+ [void __attribute__((constructor)) ctor() { int a; }],
+ [$1],
+ [$2])
])
AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler supports __attribute__((format(printf, n, n)))],
- [cc_cv_attribute_format],
- [AC_COMPILE_IFELSE([
- void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { fmt = (void *)0; }
- ],
- [cc_cv_attribute_format=yes],
- [cc_cv_attribute_format=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_attribute_format" = "xyes"; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_FORMAT], 1, [Define this if the compiler supports the format attribute])
- $1
- else
- true
- $2
- fi
+ CC_CHECK_ATTRIBUTE(
+ [format], [format(printf, n, n)],
+ [void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { fmt = (void *)0; }],
+ [$1],
+ [$2])
])
AC_DEFUN([CC_ATTRIBUTE_FORMAT_ARG], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler supports __attribute__((format_arg(printf)))],
- [cc_cv_attribute_format_arg],
- [AC_COMPILE_IFELSE([
- char *__attribute__((format_arg(1))) gettextlike(const char *fmt) { fmt = (void *)0; }
- ],
- [cc_cv_attribute_format_arg=yes],
- [cc_cv_attribute_format_arg=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_attribute_format_arg" = "xyes"; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_FORMAT_ARG], 1, [Define this if the compiler supports the format_arg attribute])
- $1
- else
- true
- $2
- fi
+ CC_CHECK_ATTRIBUTE(
+ [format_arg], [format_arg(printf)],
+ [char *__attribute__((format_arg(1))) gettextlike(const char *fmt) { fmt = (void *)0; }],
+ [$1],
+ [$2])
])
AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
- AC_REQUIRE([CC_CHECK_WERROR])
- AC_CACHE_CHECK([if $CC supports __attribute__((visibility("$1")))],
- AS_TR_SH([cc_cv_attribute_visibility_$1]),
- [ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_COMPILE_IFELSE([void __attribute__((visibility("$1"))) $1_function() { }],
- [eval "AS_TR_SH([cc_cv_attribute_visibility_$1])='yes'"],
- [eval "AS_TR_SH([cc_cv_attribute_visibility_$1])='no'"])
- CFLAGS="$ac_save_CFLAGS"
- ])
+ CC_CHECK_ATTRIBUTE(
+ [visibility_$1], [visibility("$1")],
+ [void __attribute__((visibility("$1"))) $1_function() { }],
+ [$2],
+ [$3])
+])
- if eval test [x$]AS_TR_SH([cc_cv_attribute_visibility_$1]) = xyes; then
- AC_DEFINE(AS_TR_CPP([SUPPORT_ATTRIBUTE_VISIBILITY_$1]), 1, [Define this if the compiler supports __attribute__((visibility("$1")))])
- ifelse([$2], , [:], [$2])
- else
- ifelse([$3], , [:], [$3])
- fi
+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])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
+ CC_CHECK_ATTRIBUTE(
+ [unused], ,
+ [void some_function(void *foo, __attribute__((unused)) void *bar);],
+ [$1],
+ [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [
+ CC_CHECK_ATTRIBUTE(
+ [sentinel], ,
+ [void some_function(void *foo, ...) __attribute__((sentinel));],
+ [$1],
+ [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [
+ CC_CHECK_ATTRIBUTE(
+ [deprecated], ,
+ [void some_function(void *foo, ...) __attribute__((deprecated));],
+ [$1],
+ [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_ALIAS], [
+ CC_CHECK_ATTRIBUTE(
+ [alias], [weak, alias],
+ [void other_function(void *foo) { }
+ void some_function(void *foo) __attribute__((weak, alias("other_function")));],
+ [$1],
+ [$2])
])
AC_DEFUN([CC_FLAG_VISIBILITY], [
@@ -180,53 +185,6 @@ AC_DEFUN([CC_FLAG_VISIBILITY], [
fi
])
-AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler supports __attribute__((nonnull()))],
- [cc_cv_attribute_nonnull],
- [AC_COMPILE_IFELSE([
- void some_function(void *foo, void *bar) __attribute__((nonnull()));
- void some_function(void *foo, void *bar) { foo = (void *)0; bar = (void *)0; }
- ],
- [cc_cv_attribute_nonnull=yes],
- [cc_cv_attribute_nonnull=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_attribute_nonnull" = "xyes"; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_NONNULL], 1, [Define this if the compiler supports the nonnull attribute])
- $1
- else
- true
- $2
- fi
-])
-
-AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler supports __attribute__((unused))],
- [cc_cv_attribute_unused],
- [AC_COMPILE_IFELSE([
- void some_function(void *foo, __attribute__((unused)) void *bar);
- ],
- [cc_cv_attribute_unused=yes],
- [cc_cv_attribute_unused=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_attribute_unused" = "xyes"; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_UNUSED], 1, [Define this if the compiler supports the unused attribute])
- $1
- else
- true
- $2
- fi
-])
-
AC_DEFUN([CC_FUNC_EXPECT], [
AC_REQUIRE([CC_CHECK_WERROR])
ac_save_CFLAGS="$CFLAGS"
@@ -254,53 +212,6 @@ AC_DEFUN([CC_FUNC_EXPECT], [
fi
])
-AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler supports __attribute__((sentinel))],
- [cc_cv_attribute_sentinel],
- [AC_COMPILE_IFELSE([
- void some_function(void *foo, ...) __attribute__((sentinel));
- ],
- [cc_cv_attribute_sentinel=yes],
- [cc_cv_attribute_sentinel=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_attribute_sentinel" = "xyes"; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_SENTINEL], 1, [Define this if the compiler supports the sentinel attribute])
- $1
- else
- true
- $2
- fi
-])
-
-AC_DEFUN([CC_ATTRIBUTE_ALIAS], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler supports __attribute__((weak, alias))],
- [cc_cv_attribute_alias],
- [AC_COMPILE_IFELSE([
- void other_function(void *foo) { }
- void some_function(void *foo) __attribute__((weak, alias("other_function")));
- ],
- [cc_cv_attribute_alias=yes],
- [cc_cv_attribute_alias=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_attribute_alias" = "xyes"; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_ALIAS], 1, [Define this if the compiler supports the alias attribute])
- $1
- else
- true
- $2
- fi
-])
-
AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
AC_REQUIRE([CC_CHECK_WERROR])
AC_CACHE_CHECK([highest __attribute__ ((aligned ())) supported],
@@ -322,26 +233,3 @@ AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
[Define the highest alignment supported])
fi
])
-
-AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [
- AC_REQUIRE([CC_CHECK_WERROR])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $cc_cv_werror"
- AC_CACHE_CHECK([if compiler supports __attribute__((deprecated))],
- [cc_cv_attribute_alias],
- [AC_COMPILE_IFELSE([
- void some_function(void) __attribute__((deprecated));
- ],
- [cc_cv_attribute_deprecated=yes],
- [cc_cv_attribute_deprecated=no])
- ])
- CFLAGS="$ac_save_CFLAGS"
-
- if test "x$cc_cv_attribute_deprecated" = "xyes"; then
- AC_DEFINE([SUPPORT_ATTRIBUTE_DEPRECATED], 1, [Define this if the compiler supports the deprecated attribute])
- $1
- else
- true
- $2
- fi
-])
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-22 11:21:00 +0000