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# These functions are based on the following code:
# https://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_gcc_func_attribute.m4,
# which is licensed under the following terms:
#
# Copyright (c) 2013 Gabriele Svelto <gabriele.svelto@gmail.com>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#
C_FUNC_ATTRIBUTES = {
'alias': '''
int foo(void) { return 0; }
int bar(void) __attribute__((alias("foo")));''',
'aligned':
'int foo(void) __attribute__((aligned(32)));',
'alloc_size':
'void *foo(int a) __attribute__((alloc_size(1)));',
'always_inline':
'inline __attribute__((always_inline)) int foo(void) { return 0; }',
'artificial':
'inline __attribute__((artificial)) int foo(void) { return 0; }',
'cold':
'int foo(void) __attribute__((cold));',
'const':
'int foo(void) __attribute__((const));',
'constructor':
'int foo(void) __attribute__((constructor));',
'constructor_priority':
'int foo( void ) __attribute__((__constructor__(65535/2)));',
'deprecated':
'int foo(void) __attribute__((deprecated("")));',
'destructor':
'int foo(void) __attribute__((destructor));',
'dllexport':
'__declspec(dllexport) int foo(void) { return 0; }',
'dllimport':
'__declspec(dllimport) int foo(void);',
'error':
'int foo(void) __attribute__((error("")));',
'externally_visible':
'int foo(void) __attribute__((externally_visible));',
'fallthrough': '''
int foo( void ) {
switch (0) {
case 1: __attribute__((fallthrough));
case 2: break;
}
return 0;
};''',
'flatten':
'int foo(void) __attribute__((flatten));',
'format':
'int foo(const char * p, ...) __attribute__((format(printf, 1, 2)));',
'format_arg':
'char * foo(const char * p) __attribute__((format_arg(1)));',
'force_align_arg_pointer':
'__attribute__((force_align_arg_pointer)) int foo(void) { return 0; }',
'gnu_inline':
'inline __attribute__((gnu_inline)) int foo(void) { return 0; }',
'hot':
'int foo(void) __attribute__((hot));',
'ifunc':
('int my_foo(void) { return 0; }'
'static int (*resolve_foo(void))(void) { return my_foo; }'
'int foo(void) __attribute__((ifunc("resolve_foo")));'),
'leaf':
'__attribute__((leaf)) int foo(void) { return 0; }',
'malloc':
'int *foo(void) __attribute__((malloc));',
'noclone':
'int foo(void) __attribute__((noclone));',
'noinline':
'__attribute__((noinline)) int foo(void) { return 0; }',
'nonnull':
'int foo(char * p) __attribute__((nonnull(1)));',
'noreturn':
'int foo(void) __attribute__((noreturn));',
'nothrow':
'int foo(void) __attribute__((nothrow));',
'null_terminated_string_arg':
'int foo(const char * p) __attribute__((null_terminated_string_arg(1)));',
'optimize':
'__attribute__((optimize(3))) int foo(void) { return 0; }',
'packed':
'struct __attribute__((packed)) foo { int bar; };',
'pure':
'int foo(void) __attribute__((pure));',
'returns_nonnull':
'int *foo(void) __attribute__((returns_nonnull));',
'section': '''
#if defined(__APPLE__) && defined(__MACH__)
extern int foo __attribute__((section("__BAR,__bar")));
#else
extern int foo __attribute__((section(".bar")));
#endif''',
'sentinel':
'int foo(const char *bar, ...) __attribute__((sentinel));',
'unused':
'int foo(void) __attribute__((unused));',
'used':
'int foo(void) __attribute__((used));',
'vector_size':
'__attribute__((vector_size(32))); int foo(void) { return 0; }',
'visibility': '''
int foo_def(void) __attribute__((visibility("default"))); int foo_def(void) { return 0; }
int foo_hid(void) __attribute__((visibility("hidden"))); int foo_hid(void) { return 0; }
int foo_int(void) __attribute__((visibility("internal"))); int foo_int(void) { return 0; }''',
'visibility:default':
'int foo(void) __attribute__((visibility("default"))); int foo(void) { return 0; }',
'visibility:hidden':
'int foo(void) __attribute__((visibility("hidden"))); int foo(void) { return 0; }',
'visibility:internal':
'int foo(void) __attribute__((visibility("internal"))); int foo(void) { return 0; }',
'visibility:protected':
'int foo(void) __attribute__((visibility("protected"))); int foo(void) { return 0; }',
'warning':
'int foo(void) __attribute__((warning("")));',
'warn_unused_result':
'int foo(void) __attribute__((warn_unused_result));',
'weak':
'int foo(void) __attribute__((weak));',
'weakref': '''
static int foo(void) { return 0; }
static int var(void) __attribute__((weakref("foo")));''',
'retain': '__attribute__((retain)) int x;',
}
CXX_FUNC_ATTRIBUTES = {
# Alias must be applied to the mangled name in C++
'alias':
('extern "C" {'
'int foo(void) { return 0; }'
'}'
'int bar(void) __attribute__((alias("foo")));'
),
'ifunc':
('extern "C" {'
'int my_foo(void) { return 0; }'
'static int (*resolve_foo(void))(void) { return my_foo; }'
'}'
'int foo(void) __attribute__((ifunc("resolve_foo")));'),
}
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