José Fonseca bfb4db83b6 include: Add helper header to help trap includes inside extern C.
This is just to help repro and fixing these issues with any C++ compiler --

Commiting this will of course wait until all issues are addressed.

$ scons src/glsl/
scons: Reading SConscript files ...
Checking for GCC ...  yes
Checking for Clang ...  no
Checking for X11 (x11 xext xdamage xfixes glproto >= 1.4.13)... yes
Checking for XCB (x11-xcb xcb-glx >= 1.8.1 xcb-dri2 >= 1.8)... yes
Checking for XF86VIDMODE (xxf86vm)... yes
Checking for DRM (libdrm >= 2.4.38)... yes
Checking for UDEV (libudev >= 151)... yes
warning: LLVM disabled: not building llvmpipe
scons: done reading SConscript files.
scons: Building targets ...
scons: building associated VariantDir targets: build/linux-x86_64-debug/glsl
  Compiling src/glsl/ast_array_index.cpp ...
  Compiling src/glsl/ast_expr.cpp ...
  Compiling src/glsl/ast_function.cpp ...
  Compiling src/glsl/ast_to_hir.cpp ...
  Compiling src/glsl/ast_type.cpp ...
  Compiling src/glsl/builtin_functions.cpp ...
In file included from include/c99_compat.h:28:0,
                 from src/mapi/u_compiler.h:4,
                 from src/mapi/u_thread.h:47,
                 from src/mapi/glapi/glapi.h:47,
                 from src/mesa/main/mtypes.h:42,
                 from src/mesa/main/errors.h:47,
                 from src/mesa/main/imports.h:41,
                 from src/mesa/main/core.h:44,
                 from src/glsl/builtin_functions.cpp:58:
include/no_extern_c.h:48:1: error: template with C linkage
 template<class T> class _IncludeInsideExternCNotPortable;
 ^
In file included from include/c99_compat.h:28:0,
                 from include/c11/threads.h:38,
                 from src/mapi/u_thread.h:49,
                 from src/mapi/glapi/glapi.h:47,
                 from src/mesa/main/mtypes.h:42,
                 from src/mesa/main/errors.h:47,
                 from src/mesa/main/imports.h:41,
                 from src/mesa/main/core.h:44,
                 from src/glsl/builtin_functions.cpp:58:
include/no_extern_c.h:48:1: error: template with C linkage
 template<class T> class _IncludeInsideExternCNotPortable;
 ^
  Compiling src/glsl/builtin_types.cpp ...
  Compiling src/glsl/builtin_variables.cpp ...
scons: *** [build/linux-x86_64-debug/glsl/builtin_functions.os] Error 1
scons: building terminated because of errors.

Reviewed-by: Mark Janes <mark.a.janes@intel.com>
2015-03-06 12:38:55 +00:00

145 lines
4.0 KiB
C

/**************************************************************************
*
* Copyright 2007-2013 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "no_extern_c.h"
#ifndef _C99_COMPAT_H_
#define _C99_COMPAT_H_
/*
* MSVC hacks.
*/
#if defined(_MSC_VER)
# if _MSC_VER < 1500
# error "Microsoft Visual Studio 2008 or higher required"
# endif
/*
* Visual Studio 2012 will complain if we define the `inline` keyword, but
* actually it only supports the keyword on C++.
*
* To avoid this the _ALLOW_KEYWORD_MACROS must be set.
*/
# if (_MSC_VER >= 1700) && !defined(_ALLOW_KEYWORD_MACROS)
# define _ALLOW_KEYWORD_MACROS
# endif
/*
* XXX: MSVC has a `__restrict` keyword, but it also has a
* `__declspec(restrict)` modifier, so it is impossible to define a
* `restrict` macro without interfering with the latter. Furthermore the
* MSVC standard library uses __declspec(restrict) under the _CRTRESTRICT
* macro. For now resolve this issue by redefining _CRTRESTRICT, but going
* forward we should probably should stop using restrict, especially
* considering that our code does not obbey strict aliasing rules any way.
*/
# include <crtdefs.h>
# undef _CRTRESTRICT
# define _CRTRESTRICT
#endif
/*
* C99 inline keyword
*/
#ifndef inline
# ifdef __cplusplus
/* C++ supports inline keyword */
# elif defined(__GNUC__)
# define inline __inline__
# elif defined(_MSC_VER)
# define inline __inline
# elif defined(__ICL)
# define inline __inline
# elif defined(__INTEL_COMPILER)
/* Intel compiler supports inline keyword */
# elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
# define inline __inline
# elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
/* C99 supports inline keyword */
# elif (__STDC_VERSION__ >= 199901L)
/* C99 supports inline keyword */
# else
# define inline
# endif
#endif
/*
* C99 restrict keyword
*
* See also:
* - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html
*/
#ifndef restrict
# if (__STDC_VERSION__ >= 199901L)
/* C99 */
# elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
/* C99 */
# elif defined(__GNUC__)
# define restrict __restrict__
# elif defined(_MSC_VER)
# define restrict __restrict
# else
# define restrict /* */
# endif
#endif
/*
* C99 __func__ macro
*/
#ifndef __func__
# if (__STDC_VERSION__ >= 199901L)
/* C99 */
# elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
/* C99 */
# elif defined(__GNUC__)
# define __func__ __FUNCTION__
# elif defined(_MSC_VER)
# define __func__ __FUNCTION__
# else
# define __func__ "<unknown>"
# endif
#endif
/* Simple test case for debugging */
#if 0
static inline const char *
test_c99_compat_h(const void * restrict a,
const void * restrict b)
{
return __func__;
}
#endif
#endif /* _C99_COMPAT_H_ */