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Diffstat (limited to 'toolchain/musl/include/sys/cdefs.h')
| -rw-r--r-- | toolchain/musl/include/sys/cdefs.h | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/toolchain/musl/include/sys/cdefs.h b/toolchain/musl/include/sys/cdefs.h new file mode 100644 index 0000000000..e9866700d0 --- /dev/null +++ b/toolchain/musl/include/sys/cdefs.h @@ -0,0 +1,378 @@ +/* Copyright (C) 1992-2002, 2004, 2005, 2006, 2007, 2009, 2011, 2012 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _SYS_CDEFS_H +#define _SYS_CDEFS_H 1 + +/* We are almost always included from features.h. */ +#ifndef _FEATURES_H +# include <features.h> +#endif + +/* The GNU libc does not support any K&R compilers or the traditional mode + of ISO C compilers anymore. Check for some of the combinations not + anymore supported. */ +#if defined __GNUC__ && !defined __STDC__ +# error "You need a ISO C conforming compiler to use the glibc headers" +#endif + +/* Some user header file might have defined this before. */ +#undef __P +#undef __PMT + +#ifdef __GNUC__ + +/* All functions, except those with callbacks or those that + synchronize memory, are leaf functions. */ +# if __GNUC_PREREQ (4, 6) && !defined _LIBC +# define __LEAF , __leaf__ +# define __LEAF_ATTR __attribute__ ((__leaf__)) +# else +# define __LEAF +# define __LEAF_ATTR +# endif + +/* GCC can always grok prototypes. For C++ programs we add throw() + to help it optimize the function calls. But this works only with + gcc 2.8.x and egcs. For gcc 3.2 and up we even mark C functions + as non-throwing using a function attribute since programs can use + the -fexceptions options for C code as well. */ +# if !defined __cplusplus && __GNUC_PREREQ (3, 3) +# define __THROW __attribute__ ((__nothrow__ __LEAF)) +# define __THROWNL __attribute__ ((__nothrow__)) +# define __NTH(fct) __attribute__ ((__nothrow__ __LEAF)) fct +# else +# if defined __cplusplus && __GNUC_PREREQ (2,8) +# define __THROW throw () +# define __THROWNL throw () +# define __NTH(fct) __LEAF_ATTR fct throw () +# else +# define __THROW +# define __THROWNL +# define __NTH(fct) fct +# endif +# endif + +#else /* Not GCC. */ + +# define __inline /* No inline functions. */ + +# define __THROW +# define __THROWNL +# define __NTH(fct) fct + +#endif /* GCC. */ + +/* These two macros are not used in glibc anymore. They are kept here + only because some other projects expect the macros to be defined. */ +#define __P(args) args +#define __PMT(args) args + +/* For these things, GCC behaves the ANSI way normally, + and the non-ANSI way under -traditional. */ + +#define __CONCAT(x,y) x ## y +#define __STRING(x) #x + +/* This is not a typedef so `const __ptr_t' does the right thing. */ +#define __ptr_t void * +#define __long_double_t long double + + +/* C++ needs to know that types and declarations are C, not C++. */ +#ifdef __cplusplus +# define __BEGIN_DECLS extern "C" { +# define __END_DECLS } +#else +# define __BEGIN_DECLS +# define __END_DECLS +#endif + + +/* The standard library needs the functions from the ISO C90 standard + in the std namespace. At the same time we want to be safe for + future changes and we include the ISO C99 code in the non-standard + namespace __c99. The C++ wrapper header take case of adding the + definitions to the global namespace. */ +#if defined __cplusplus && defined _GLIBCPP_USE_NAMESPACES +# define __BEGIN_NAMESPACE_STD namespace std { +# define __END_NAMESPACE_STD } +# define __USING_NAMESPACE_STD(name) using std::name; +# define __BEGIN_NAMESPACE_C99 namespace __c99 { +# define __END_NAMESPACE_C99 } +# define __USING_NAMESPACE_C99(name) using __c99::name; +#else +/* For compatibility we do not add the declarations into any + namespace. They will end up in the global namespace which is what + old code expects. */ +# define __BEGIN_NAMESPACE_STD +# define __END_NAMESPACE_STD +# define __USING_NAMESPACE_STD(name) +# define __BEGIN_NAMESPACE_C99 +# define __END_NAMESPACE_C99 +# define __USING_NAMESPACE_C99(name) +#endif + + +/* Support for bounded pointers. */ +#ifndef __BOUNDED_POINTERS__ +# define __bounded /* nothing */ +# define __unbounded /* nothing */ +# define __ptrvalue /* nothing */ +#endif + + +/* Fortify support. */ +#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1) +#define __bos0(ptr) __builtin_object_size (ptr, 0) +#define __fortify_function __extern_always_inline __attribute_artificial__ + +#if __GNUC_PREREQ (4,3) +# define __warndecl(name, msg) \ + extern void name (void) __attribute__((__warning__ (msg))) +# define __warnattr(msg) __attribute__((__warning__ (msg))) +# define __errordecl(name, msg) \ + extern void name (void) __attribute__((__error__ (msg))) +#else +# define __warndecl(name, msg) extern void name (void) +# define __warnattr(msg) +# define __errordecl(name, msg) extern void name (void) +#endif + +/* Support for flexible arrays. */ +#if __GNUC_PREREQ (2,97) +/* GCC 2.97 supports C99 flexible array members. */ +# define __flexarr [] +#else +# ifdef __GNUC__ +# define __flexarr [0] +# else +# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L +# define __flexarr [] +# else +/* Some other non-C99 compiler. Approximate with [1]. */ +# define __flexarr [1] +# endif +# endif +#endif + + +/* __asm__ ("xyz") is used throughout the headers to rename functions + at the assembly language level. This is wrapped by the __REDIRECT + macro, in order to support compilers that can do this some other + way. When compilers don't support asm-names at all, we have to do + preprocessor tricks instead (which don't have exactly the right + semantics, but it's the best we can do). + + Example: + int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid); */ + +#if defined __GNUC__ && __GNUC__ >= 2 + +# define __REDIRECT(name, proto, alias) name proto __asm__ (__ASMNAME (#alias)) +# ifdef __cplusplus +# define __REDIRECT_NTH(name, proto, alias) \ + name proto __THROW __asm__ (__ASMNAME (#alias)) +# define __REDIRECT_NTHNL(name, proto, alias) \ + name proto __THROWNL __asm__ (__ASMNAME (#alias)) +# else +# define __REDIRECT_NTH(name, proto, alias) \ + name proto __asm__ (__ASMNAME (#alias)) __THROW +# define __REDIRECT_NTHNL(name, proto, alias) \ + name proto __asm__ (__ASMNAME (#alias)) __THROWNL +# endif +# define __ASMNAME(cname) __ASMNAME2 (__USER_LABEL_PREFIX__, cname) +# define __ASMNAME2(prefix, cname) __STRING (prefix) cname + +/* +#elif __SOME_OTHER_COMPILER__ + +# define __REDIRECT(name, proto, alias) name proto; \ + _Pragma("let " #name " = " #alias) +*/ +#endif + +/* GCC has various useful declarations that can be made with the + `__attribute__' syntax. All of the ways we use this do fine if + they are omitted for compilers that don't understand it. */ +#if !defined __GNUC__ || __GNUC__ < 2 +# define __attribute__(xyz) /* Ignore */ +#endif + +/* At some point during the gcc 2.96 development the `malloc' attribute + for functions was introduced. We don't want to use it unconditionally + (although this would be possible) since it generates warnings. */ +#if __GNUC_PREREQ (2,96) +# define __attribute_malloc__ __attribute__ ((__malloc__)) +#else +# define __attribute_malloc__ /* Ignore */ +#endif + +/* At some point during the gcc 2.96 development the `pure' attribute + for functions was introduced. We don't want to use it unconditionally + (although this would be possible) since it generates warnings. */ +#if __GNUC_PREREQ (2,96) +# define __attribute_pure__ __attribute__ ((__pure__)) +#else +# define __attribute_pure__ /* Ignore */ +#endif + +/* This declaration tells the compiler that the value is constant. */ +#if __GNUC_PREREQ (2,5) +# define __attribute_const__ __attribute__ ((__const__)) +#else +# define __attribute_const__ /* Ignore */ +#endif + +/* At some point during the gcc 3.1 development the `used' attribute + for functions was introduced. We don't want to use it unconditionally + (although this would be possible) since it generates warnings. */ +#if __GNUC_PREREQ (3,1) +# define __attribute_used__ __attribute__ ((__used__)) +# define __attribute_noinline__ __attribute__ ((__noinline__)) +#else +# define __attribute_used__ __attribute__ ((__unused__)) +# define __attribute_noinline__ /* Ignore */ +#endif + +/* gcc allows marking deprecated functions. */ +#if __GNUC_PREREQ (3,2) +# define __attribute_deprecated__ __attribute__ ((__deprecated__)) +#else +# define __attribute_deprecated__ /* Ignore */ +#endif + +/* At some point during the gcc 2.8 development the `format_arg' attribute + for functions was introduced. We don't want to use it unconditionally + (although this would be possible) since it generates warnings. + If several `format_arg' attributes are given for the same function, in + gcc-3.0 and older, all but the last one are ignored. In newer gccs, + all designated arguments are considered. */ +#if __GNUC_PREREQ (2,8) +# define __attribute_format_arg__(x) __attribute__ ((__format_arg__ (x))) +#else +# define __attribute_format_arg__(x) /* Ignore */ +#endif + +/* At some point during the gcc 2.97 development the `strfmon' format + attribute for functions was introduced. We don't want to use it + unconditionally (although this would be possible) since it + generates warnings. */ +#if __GNUC_PREREQ (2,97) +# define __attribute_format_strfmon__(a,b) \ + __attribute__ ((__format__ (__strfmon__, a, b))) +#else +# define __attribute_format_strfmon__(a,b) /* Ignore */ +#endif + +/* The nonull function attribute allows to mark pointer parameters which + must not be NULL. */ +#if __GNUC_PREREQ (3,3) +# define __nonnull(params) __attribute__ ((__nonnull__ params)) +#else +# define __nonnull(params) +#endif + +/* If fortification mode, we warn about unused results of certain + function calls which can lead to problems. */ +#if __GNUC_PREREQ (3,4) +# define __attribute_warn_unused_result__ \ + __attribute__ ((__warn_unused_result__)) +# if __USE_FORTIFY_LEVEL > 0 +# define __wur __attribute_warn_unused_result__ +# endif +#else +# define __attribute_warn_unused_result__ /* empty */ +#endif +#ifndef __wur +# define __wur /* Ignore */ +#endif + +/* Forces a function to be always inlined. */ +#if __GNUC_PREREQ (3,2) +# define __always_inline __inline __attribute__ ((__always_inline__)) +#else +# define __always_inline __inline +#endif + +/* Associate error messages with the source location of the call site rather + than with the source location inside the function. */ +#if __GNUC_PREREQ (4,3) +# define __attribute_artificial__ __attribute__ ((__artificial__)) +#else +# define __attribute_artificial__ /* Ignore */ +#endif + +/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99 + inline semantics, unless -fgnu89-inline is used. */ +#if !defined __cplusplus || __GNUC_PREREQ (4,3) +# if defined __GNUC_STDC_INLINE__ || defined __cplusplus +# define __extern_inline extern __inline __attribute__ ((__gnu_inline__)) +# define __extern_always_inline \ + extern __always_inline __attribute__ ((__gnu_inline__)) +# else +# define __extern_inline extern __inline +# define __extern_always_inline extern __always_inline +# endif +#endif + +/* GCC 4.3 and above allow passing all anonymous arguments of an + __extern_always_inline function to some other vararg function. */ +#if __GNUC_PREREQ (4,3) +# define __va_arg_pack() __builtin_va_arg_pack () +# define __va_arg_pack_len() __builtin_va_arg_pack_len () +#endif + +/* It is possible to compile containing GCC extensions even if GCC is + run in pedantic mode if the uses are carefully marked using the + `__extension__' keyword. But this is not generally available before + version 2.8. */ +#if !__GNUC_PREREQ (2,8) +# define __extension__ /* Ignore */ +#endif + +/* __restrict is known in EGCS 1.2 and above. */ +#if !__GNUC_PREREQ (2,92) +# define __restrict /* Ignore */ +#endif + +/* ISO C99 also allows to declare arrays as non-overlapping. The syntax is + array_name[restrict] + GCC 3.1 supports this. */ +#if __GNUC_PREREQ (3,1) && !defined __GNUG__ +# define __restrict_arr __restrict +#else +# ifdef __GNUC__ +# define __restrict_arr /* Not supported in old GCC. */ +# else +# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L +# define __restrict_arr restrict +# else +/* Some other non-C99 compiler. */ +# define __restrict_arr /* Not supported. */ +# endif +# endif +#endif + +#if __GNUC__ >= 3 +# define __glibc_unlikely(cond) __builtin_expect((cond), 0) +#else +# define __glibc_unlikely(cond) (cond) +#endif + +#endif /* sys/cdefs.h */ |