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rakshasa
c9d8a2406d
by default. git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@798 e378c898-3ddf-0310-93e7-cc216c733640
141 lines
3.5 KiB
Plaintext
141 lines
3.5 KiB
Plaintext
# Functions to check for attributes support in compiler
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AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
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AC_CACHE_CHECK([if compiler supports __attribute__((constructor))],
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[cc_cv_attribute_constructor],
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[AC_COMPILE_IFELSE([
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void ctor() __attribute__((constructor));
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void ctor() { };
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],
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[cc_cv_attribute_constructor=yes],
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[cc_cv_attribute_constructor=no])
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])
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if test "x$cc_cv_attribute_constructor" = "xyes"; then
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AC_DEFINE([SUPPORT_ATTRIBUTE_CONSTRUCTOR], 1, [Define this if the compiler supports the constructor attribute])
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$1
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else
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true
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$2
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fi
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])
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AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
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AC_CACHE_CHECK([if compiler supports __attribute__((format(printf, n, n)))],
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[cc_cv_attribute_format],
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[AC_COMPILE_IFELSE([
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void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { }
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],
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[cc_cv_attribute_format=yes],
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[cc_cv_attribute_format=no])
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])
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if test "x$cc_cv_attribute_format" = "xyes"; then
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AC_DEFINE([SUPPORT_ATTRIBUTE_FORMAT], 1, [Define this if the compiler supports the format attribute])
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$1
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else
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true
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$2
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fi
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])
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AC_DEFUN([CC_ATTRIBUTE_INTERNAL], [
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AC_CACHE_CHECK([if compiler supports __attribute__((visibility("internal")))],
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[cc_cv_attribute_internal],
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[AC_COMPILE_IFELSE([
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void __attribute__((visibility("internal"))) internal_function() { }
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],
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[cc_cv_attribute_internal=yes],
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[cc_cv_attribute_internal=no])
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])
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if test "x$cc_cv_attribute_internal" = "xyes"; then
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AC_DEFINE([SUPPORT_ATTRIBUTE_INTERNAL], 1, [Define this if the compiler supports the internal visibility attribute])
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$1
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else
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true
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$2
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fi
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])
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AC_DEFUN([CC_ATTRIBUTE_DEFAULT], [
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AC_CACHE_CHECK([if compiler supports __attribute__((visibility("default")))],
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[cc_cv_attribute_default],
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[AC_COMPILE_IFELSE([
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void __attribute__((visibility("default"))) default_function() { }
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],
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[cc_cv_attribute_default=yes],
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[cc_cv_attribute_default=no])
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])
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if test "x$cc_cv_attribute_default" = "xyes"; then
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AC_DEFINE([SUPPORT_ATTRIBUTE_DEFAULT], 1, [Define this if the compiler supports the default visibility attribute])
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$1
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else
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true
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$2
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fi
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])
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AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
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AC_CACHE_CHECK([if compiler supports __attribute__((nonnull()))],
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[cc_cv_attribute_nonnull],
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[AC_COMPILE_IFELSE([
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void some_function(void *foo, void *bar) __attribute__((nonnull()));
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void some_function(void *foo, void *bar) { }
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],
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[cc_cv_attribute_nonnull=yes],
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[cc_cv_attribute_nonnull=no])
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])
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if test "x$cc_cv_attribute_nonnull" = "xyes"; then
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AC_DEFINE([SUPPORT_ATTRIBUTE_NONNULL], 1, [Define this if the compiler supports the nonnull attribute])
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$1
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else
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true
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$2
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fi
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])
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AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
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AC_CACHE_CHECK([if compiler supports __attribute__((unused))],
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[cc_cv_attribute_unused],
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[AC_COMPILE_IFELSE([
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void some_function(void *foo, __attribute__((unused)) void *bar);
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],
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[cc_cv_attribute_unused=yes],
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[cc_cv_attribute_unused=no])
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])
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if test "x$cc_cv_attribute_unused" = "xyes"; then
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AC_DEFINE([SUPPORT_ATTRIBUTE_UNUSED], 1, [Define this if the compiler supports the unused attribute])
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$1
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else
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true
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$2
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fi
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])
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AC_DEFUN([CC_FUNC_EXPECT], [
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AC_CACHE_CHECK([if compiler has __builtin_expect function],
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[cc_cv_func_expect],
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[AC_COMPILE_IFELSE([
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int some_function()
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{
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int a = 3;
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return (int)__builtin_expect(a, 3);
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}
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],
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[cc_cv_func_expect=yes],
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[cc_cv_func_expect=no])
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])
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if test "x$cc_cv_func_expect" = "xyes"; then
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AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1, [Define this if the compiler supports __builtin_expect() function])
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$1
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else
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true
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$2
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fi
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])
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