diff options
| -rw-r--r-- | build-aux/m4/ax_gcc_func_attribute.m4 | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/build-aux/m4/ax_gcc_func_attribute.m4 b/build-aux/m4/ax_gcc_func_attribute.m4 deleted file mode 100644 index c788ca9bd4..0000000000 --- a/build-aux/m4/ax_gcc_func_attribute.m4 +++ /dev/null @@ -1,223 +0,0 @@ -# =========================================================================== -# http://www.gnu.org/software/autoconf-archive/ax_gcc_func_attribute.html -# =========================================================================== -# -# SYNOPSIS -# -# AX_GCC_FUNC_ATTRIBUTE(ATTRIBUTE) -# -# DESCRIPTION -# -# This macro checks if the compiler supports one of GCC's function -# attributes; many other compilers also provide function attributes with -# the same syntax. Compiler warnings are used to detect supported -# attributes as unsupported ones are ignored by default so quieting -# warnings when using this macro will yield false positives. -# -# The ATTRIBUTE parameter holds the name of the attribute to be checked. -# -# If ATTRIBUTE is supported define HAVE_FUNC_ATTRIBUTE_<ATTRIBUTE>. -# -# The macro caches its result in the ax_cv_have_func_attribute_<attribute> -# variable. -# -# The macro currently supports the following function attributes: -# -# alias -# aligned -# alloc_size -# always_inline -# artificial -# cold -# const -# constructor -# constructor_priority for constructor attribute with priority -# deprecated -# destructor -# dllexport -# dllimport -# error -# externally_visible -# flatten -# format -# format_arg -# gnu_inline -# hot -# ifunc -# leaf -# malloc -# noclone -# noinline -# nonnull -# noreturn -# nothrow -# optimize -# pure -# unused -# used -# visibility -# warning -# warn_unused_result -# weak -# weakref -# -# Unsuppored function attributes will be tested with a prototype returning -# an int and not accepting any arguments and the result of the check might -# be wrong or meaningless so use with care. -# -# LICENSE -# -# 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. - -#serial 3 - -AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [ - AS_VAR_PUSHDEF([ac_var], [ax_cv_have_func_attribute_$1]) - - AC_CACHE_CHECK([for __attribute__(($1))], [ac_var], [ - AC_LINK_IFELSE([AC_LANG_PROGRAM([ - m4_case([$1], - [alias], [ - int foo( void ) { return 0; } - int bar( void ) __attribute__(($1("foo"))); - ], - [aligned], [ - int foo( void ) __attribute__(($1(32))); - ], - [alloc_size], [ - void *foo(int a) __attribute__(($1(1))); - ], - [always_inline], [ - inline __attribute__(($1)) int foo( void ) { return 0; } - ], - [artificial], [ - inline __attribute__(($1)) int foo( void ) { return 0; } - ], - [cold], [ - int foo( void ) __attribute__(($1)); - ], - [const], [ - int foo( void ) __attribute__(($1)); - ], - [constructor_priority], [ - int foo( void ) __attribute__((__constructor__(65535/2))); - ], - [constructor], [ - int foo( void ) __attribute__(($1)); - ], - [deprecated], [ - int foo( void ) __attribute__(($1(""))); - ], - [destructor], [ - int foo( void ) __attribute__(($1)); - ], - [dllexport], [ - __attribute__(($1)) int foo( void ) { return 0; } - ], - [dllimport], [ - int foo( void ) __attribute__(($1)); - ], - [error], [ - int foo( void ) __attribute__(($1(""))); - ], - [externally_visible], [ - int foo( void ) __attribute__(($1)); - ], - [flatten], [ - int foo( void ) __attribute__(($1)); - ], - [format], [ - int foo(const char *p, ...) __attribute__(($1(printf, 1, 2))); - ], - [format_arg], [ - char *foo(const char *p) __attribute__(($1(1))); - ], - [gnu_inline], [ - inline __attribute__(($1)) int foo( void ) { return 0; } - ], - [hot], [ - int foo( void ) __attribute__(($1)); - ], - [ifunc], [ - int my_foo( void ) { return 0; } - static int (*resolve_foo(void))(void) { return my_foo; } - int foo( void ) __attribute__(($1("resolve_foo"))); - ], - [leaf], [ - __attribute__(($1)) int foo( void ) { return 0; } - ], - [malloc], [ - void *foo( void ) __attribute__(($1)); - ], - [noclone], [ - int foo( void ) __attribute__(($1)); - ], - [noinline], [ - __attribute__(($1)) int foo( void ) { return 0; } - ], - [nonnull], [ - int foo(char *p) __attribute__(($1(1))); - ], - [noreturn], [ - void foo( void ) __attribute__(($1)); - ], - [nothrow], [ - int foo( void ) __attribute__(($1)); - ], - [optimize], [ - __attribute__(($1(3))) int foo( void ) { return 0; } - ], - [pure], [ - int foo( void ) __attribute__(($1)); - ], - [unused], [ - int foo( void ) __attribute__(($1)); - ], - [used], [ - int foo( void ) __attribute__(($1)); - ], - [visibility], [ - int foo_def( void ) __attribute__(($1("default"))); - int foo_hid( void ) __attribute__(($1("hidden"))); - int foo_int( void ) __attribute__(($1("internal"))); - int foo_pro( void ) __attribute__(($1("protected"))); - ], - [warning], [ - int foo( void ) __attribute__(($1(""))); - ], - [warn_unused_result], [ - int foo( void ) __attribute__(($1)); - ], - [weak], [ - int foo( void ) __attribute__(($1)); - ], - [weakref], [ - static int foo( void ) { return 0; } - static int bar( void ) __attribute__(($1("foo"))); - ], - [ - m4_warn([syntax], [Unsupported attribute $1, the test may fail]) - int foo( void ) __attribute__(($1)); - ] - )], []) - ], - dnl GCC doesn't exit with an error if an unknown attribute is - dnl provided but only outputs a warning, so accept the attribute - dnl only if no warning were issued. - [AS_IF([test -s conftest.err], - [AS_VAR_SET([ac_var], [no])], - [AS_VAR_SET([ac_var], [yes])])], - [AS_VAR_SET([ac_var], [no])]) - ]) - - AS_IF([test yes = AS_VAR_GET([ac_var])], - [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_FUNC_ATTRIBUTE_$1), 1, - [Define to 1 if the system has the `$1' function attribute])], []) - - AS_VAR_POPDEF([ac_var]) -]) |