Create a build_config header file.

src/include/build_config.h

+/*
+ * Copyright 2014 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef NATIVE_CLIENT_SRC_INCLUDE_BUILD_CONFIG_H_
+#define NATIVE_CLIENT_SRC_INCLUDE_BUILD_CONFIG_H_ 1
+
+#include "native_client/src/include/nacl_base.h"
+
+/* TODO(teravest): Remove this guard when builds stop defining these. */

[Mark Seaborn, 2014/12/29 17:51:04]

To be more specific, "when the Chromium build stops defining these via
components/nacl/nacl_defines.gypi", perhaps?

I suppose this guard would still be necessary for assembly files, but not C/C++
files, when building Chromium?

[teravest, 2014/12/29 22:29:28]

I've removed this TODO since we might need this guard for assembly files.

+#if !defined(NACL_WINDOWS) && !defined(NACL_LINUX) && !defined(NACL_OSX)
+
+#if defined(_WIN32)
+# define NACL_WINDOWS 1
+#else
+# define NACL_WINDOWS 0
+#endif
+
+#if defined(__linux__)
+# define NACL_LINUX 1
+#else
+# define NACL_LINUX 0
+#endif
+
+#if defined(__APPLE__)
+# define NACL_OSX 1
+#else
+# define NACL_OSX 0
+#endif
+
+#endif
+
+#if !defined(NACL_ANDROID)

[Mark Seaborn, 2014/12/29 17:51:04]

Why is this checked separately from NACL_WINDOWS/LINUX/OSX above?

[teravest, 2014/12/29 22:29:29]

I've lumped this in with the rest.

+# if defined(ANDROID)
+#  define NACL_ANDROID 1
+# else
+#  define NACL_ANDROID 0
+# endif
+#endif
+
+/* TODO(teravest): Remove this guard when builds stop defining these. */
+#if defined(NACL_BUILD_ARCH) && (NACL_ARCH(NACL_BUILD_ARCH) != NACL_pnacl) && !defined(NACL_BUILD_SUBARCH)

[Mark Seaborn, 2014/12/29 17:51:04]

Line is >80 chars; please wrap

[teravest, 2014/12/29 22:29:28]

Done.

+# error Please define both NACL_BUILD_ARCH and NACL_BUILD_SUBARCH.
+#elif !defined(NACL_BUILD_ARCH) && defined(NACL_BUILD_SUBARCH)
+# error Please define both NACL_BUILD_ARCH and NACL_BUILD_SUBARCH.
+#endif
+
+
+#if !defined(NACL_BUILD_ARCH)
+
+#if defined(_M_X64) || defined(__x86_64__)
+# define NACL_BUILD_ARCH x86
+# define NACL_BUILD_SUBARCH 64
+#endif
+
+#if defined(_M_IX86) || defined(__i386__)
+# define NACL_BUILD_ARCH x86
+# define NACL_BUILD_SUBARCH 32
+#endif
+
+#if defined(__ARMEL__)
+# define NACL_BUILD_ARCH arm
+# define NACL_BUILD_SUBARCH 32
+#endif
+
+#if defined(__MIPSEL__)
+# define NACL_BUILD_ARCH mips
+# define NACL_BUILD_SUBARCH 32
+#endif
+
+#endif  /* !defined(NACL_BUILD_ARCH) */
+
+/* TODO(teravest): Require NACL_BUILD_ARCH and NACL_BUILD_SUBARCH to be defined

[Mark Seaborn, 2014/12/29 17:51:04]

Nit: Use the NaCl style for multiline comments, with "/*" and "*/" on separate
lines

[teravest, 2014/12/29 22:29:28]

Done.

+ * once they're defined for the pnacl translator build. */
+
+#endif  /* NATIVE_CLIENT_SRC_INCLUDE_BUILD_CONFIG_H_ */