gallium: New configuration header.

To abstract all those weird #ifdef (__???__) checks.

It should typically be the first included header.

src/gallium/include/pipe/p_compiler.h

@@ -29,6 +29,8 @@
 #define P_COMPILER_H
 
 
+#include "p_config.h"
+
 #include <stdlib.h>
 #include <string.h>
 

src/gallium/include/pipe/p_config.h

@@ -0,0 +1,112 @@
+/**************************************************************************
+ * 
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 TUNGSTEN GRAPHICS 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.
+ * 
+ **************************************************************************/
+
+/**
+ * @file
+ * Gallium configuration defines.
+ * 
+ * This header file sets several defines based on the compiler, processor 
+ * architecture, and operating system being used. These defines should be used 
+ * throughout the code to facilitate porting to new platforms. It is likely that 
+ * this file is auto-generated by an autoconf-like tool at some point, as some 
+ * things cannot be determined by existing defines alone. 
+ * 
+ * @author José Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+#ifndef P_CONFIG_H_
+#define P_CONFIG_H_
+
+
+/*
+ * Compiler
+ */
+
+#if defined(__GNUC__)
+#define PIPE_CC_GCC
+#endif
+
+#if defined(_MSC_VER) || defined(__MSC__)
+#define PIPE_CC_MSVC
+#endif
+
+#if defined(__ICL)
+#define PIPE_CC_ICL
+#endif
+
+
+/*
+ * Processor architecture
+ */
+
+#if defined(_X86_) || defined(__i386__) || defined(__386__) || defined(i386)
+#define PIPE_ARCH_X86
+#endif
+
+#if 0 /* FIXME */
+#define PIPE_ARCH_X86_64
+#endif
+
+#if 0 /* FIXME */
+#define PIPE_ARCH_PPC
+#endif
+
+
+/*
+ * Operating system
+ */
+
+#if defined(__linux__)
+#define PIPE_OS_LINUX
+#endif
+
+#if defined(_WIN32) || defined(WIN32)
+#define PIPE_OS_WINDOWS
+#endif
+
+
+/*
+ * Subsystem
+ * 
+ * XXX: There is no way to autodetect this.
+ */
+
+#if defined(PIPE_OS_LINUX)
+#define PIPE_SUBSYSTEM_DRI
+#endif
+
+#if defined(PIPE_OS_WINDOWS)
+#if !defined(PIPE_SUBSYSTEM_USER) && !defined(PIPE_SUBSYSTEM_KERNEL)
+#error Neither PIPE_SUBSYSTEM_USER or PIPE_SUBSYSTEM_KERNEL defined.
+#endif
+#if defined(PIPE_SUBSYSTEM_KERNEL)
+#define PIPE_SUBSYSTEM_WINDOWS_DISPLAY
+#endif
+#endif
+
+
+#endif /* P_CONFIG_H_ */