1 /* 2 Copyright (c) 1991, 1993 3 The Regents of the University of California. All rights reserved. 4 c) UNIX System Laboratories, Inc. 5 All or some portions of this file are derived from material licensed 6 to the University of California by American Telephone and Telegraph 7 Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 the permission of UNIX System Laboratories, Inc. 9 10 Redistribution and use in source and binary forms, with or without 11 modification, are permitted provided that the following conditions 12 are met: 13 1. Redistributions of source code must retain the above copyright 14 notice, this list of conditions and the following disclaimer. 15 2. Redistributions in binary form must reproduce the above copyright 16 notice, this list of conditions and the following disclaimer in the 17 documentation and/or other materials provided with the distribution. 18 3. Neither the name of the University nor the names of its contributors 19 may be used to endorse or promote products derived from this software 20 without specific prior written permission. 21 22 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 SUCH DAMAGE. 33 */ 34 /* Provide support for both ANSI and non-ANSI environments. */ 35 36 /* To get a strict ANSI C environment, define macro __STRICT_ANSI__. This will 37 "comment out" the non-ANSI parts of the ANSI header files (non-ANSI header 38 files aren't affected). */ 39 40 #ifndef _ANSIDECL_H_ 41 #define _ANSIDECL_H_ 42 43 #include <newlib.h> 44 #include <sys/config.h> 45 46 /* ISO C++. */ 47 48 #ifdef __cplusplus 49 #if !(defined(_BEGIN_STD_C) && defined(_END_STD_C)) 50 #ifdef _HAVE_STD_CXX 51 #define _BEGIN_STD_C namespace std { extern "C" { 52 #define _END_STD_C } } 53 #else 54 #define _BEGIN_STD_C extern "C" { 55 #define _END_STD_C } 56 #endif 57 #if __GNUC_PREREQ (3, 3) 58 #define _NOTHROW __attribute__ ((__nothrow__)) 59 #else 60 #define _NOTHROW throw() 61 #endif 62 #endif 63 #else 64 #define _BEGIN_STD_C 65 #define _END_STD_C 66 #if __GNUC_PREREQ (3, 3) 67 #define _NOTHROW __attribute__ ((__nothrow__)) 68 #else 69 #define _NOTHROW 70 #endif 71 #endif 72 73 #ifndef _LONG_DOUBLE 74 #define _LONG_DOUBLE long double 75 #endif 76 77 /* Support gcc's __attribute__ facility. */ 78 79 #ifdef __GNUC__ 80 #define _ATTRIBUTE(attrs) __attribute__ (attrs) 81 #else 82 #define _ATTRIBUTE(attrs) 83 #endif 84 85 /* The traditional meaning of 'extern inline' for GCC is not 86 to emit the function body unless the address is explicitly 87 taken. However this behaviour is changing to match the C99 88 standard, which uses 'extern inline' to indicate that the 89 function body *must* be emitted. Likewise, a function declared 90 without either 'extern' or 'static' defaults to extern linkage 91 (C99 6.2.2p5), and the compiler may choose whether to use the 92 inline version or call the extern linkage version (6.7.4p6). 93 If we are using GCC, but do not have the new behaviour, we need 94 to use extern inline; if we are using a new GCC with the 95 C99-compatible behaviour, or a non-GCC compiler (which we will 96 have to hope is C99, since there is no other way to achieve the 97 effect of omitting the function if it isn't referenced) we use 98 'static inline', which c99 defines to mean more-or-less the same 99 as the Gnu C 'extern inline'. */ 100 #if defined(__GNUC__) && !defined(__GNUC_STDC_INLINE__) 101 /* We're using GCC, but without the new C99-compatible behaviour. */ 102 #define _ELIDABLE_INLINE extern __inline__ _ATTRIBUTE ((__always_inline__)) 103 #else 104 /* We're using GCC in C99 mode, or an unknown compiler which 105 we just have to hope obeys the C99 semantics of inline. */ 106 #define _ELIDABLE_INLINE static __inline__ 107 #endif 108 109 #if __GNUC_PREREQ (3, 1) 110 #define _NOINLINE __attribute__ ((__noinline__)) 111 #define _NOINLINE_STATIC _NOINLINE static 112 #else 113 /* On non-GNU compilers and GCC prior to version 3.1 the compiler can't be 114 trusted not to inline if it is static. */ 115 #define _NOINLINE 116 #define _NOINLINE_STATIC 117 #endif 118 119 #endif /* _ANSIDECL_H_ */ 120
