Provide OS_ and COMPILER_ macros for OS and compiler differentiation

Review URL: http://chrome-reviews.prom.corp.google.com/1108

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@338 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 57 insertions, 0 deletions

diff --git a/build/build_config.h b/build/build_config.h
new file mode 100644
index 0000000..af9a5076
--- /dev/null
+++ b/build/build_config.h
@@ -0,0 +1,57 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef BUILD_BUILD_CONFIG_H_
+#define BUILD_BUILD_CONFIG_H_
+
+// A set of macros to use for platform detection.
+#if defined(__APPLE__)
+#define OS_MACOSX 1
+#elif defined(linux)
+#define OS_LINUX 1
+#elif defined(WIN32)
+#define OS_WINDOWS 1
+#else
+#error Please add support for your platform in build/build_config.h
+#endif
+
+// For access to standard POSIX features, use OS_POSIX instead of a more
+// specific macro.
+#if defined(OS_MACOSX) || defined(OS_LINUX)
+#define OS_POSIX 1
+#endif
+
+// Compiler detection.
+#if defined(__GNUC__)
+#define COMPILER_GCC
+#elif defined(_MSC_VER)
+#define COMPILER_MSVC
+#endif
+
+#endif  // BUILD_BUILD_CONFIG_H_