1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// This file adds defines about the platform we're currently building on.
6// Operating System:
7// OS_WIN / OS_MACOSX / OS_LINUX / OS_POSIX (MACOSX or LINUX) /
8// OS_NACL (NACL_SFI or NACL_NONSFI) / OS_NACL_SFI / OS_NACL_NONSFI
9// Compiler:
10// COMPILER_MSVC / COMPILER_GCC
11// Processor:
12// ARCH_CPU_X86 / ARCH_CPU_X86_64 / ARCH_CPU_X86_FAMILY (X86 or X86_64)
13// ARCH_CPU_32_BITS / ARCH_CPU_64_BITS
14
15#ifndef BUTIL_BUILD_CONFIG_H_
16#define BUTIL_BUILD_CONFIG_H_
17
18// A set of macros to use for platform detection.
19#if defined(__native_client__)
20// __native_client__ must be first, so that other OS_ defines are not set.
21#define OS_NACL 1
22// OS_NACL comes in two sandboxing technology flavors, SFI or Non-SFI.
23// PNaCl toolchain defines __native_client_nonsfi__ macro in Non-SFI build
24// mode, while it does not in SFI build mode.
25#if defined(__native_client_nonsfi__)
26#define OS_NACL_NONSFI
27#else
28#define OS_NACL_SFI
29#endif
30#elif defined(ANDROID)
31#define OS_ANDROID 1
32#elif defined(__APPLE__)
33// only include TargetConditions after testing ANDROID as some android builds
34// on mac don't have this header available and it's not needed unless the target
35// is really mac/ios.
36#include <TargetConditionals.h>
37#define OS_MACOSX 1
38#if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
39#define OS_IOS 1
40#endif // defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
41#elif defined(__linux__)
42#define OS_LINUX 1
43// include a system header to pull in features.h for glibc/uclibc macros.
44#include <unistd.h>
45#if defined(__GLIBC__) && !defined(__UCLIBC__)
46// we really are using glibc, not uClibc pretending to be glibc
47#define LIBC_GLIBC 1
48#endif
49#elif defined(_WIN32)
50#define OS_WIN 1
51#define TOOLKIT_VIEWS 1
52#elif defined(__FreeBSD__)
53#define OS_FREEBSD 1
54#elif defined(__OpenBSD__)
55#define OS_OPENBSD 1
56#elif defined(__sun)
57#define OS_SOLARIS 1
58#elif defined(__QNXNTO__)
59#define OS_QNX 1
60#else
61#error Please add support for your platform in butil/build_config.h
62#endif
63
64#if defined(USE_OPENSSL_CERTS) && defined(USE_NSS_CERTS)
65#error Cannot use both OpenSSL and NSS for certificates
66#endif
67
68// For access to standard BSD features, use OS_BSD instead of a
69// more specific macro.
70#if defined(OS_FREEBSD) || defined(OS_OPENBSD)
71#define OS_BSD 1
72#endif
73
74// For access to standard POSIXish features, use OS_POSIX instead of a
75// more specific macro.
76#if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_FREEBSD) || \
77 defined(OS_OPENBSD) || defined(OS_SOLARIS) || defined(OS_ANDROID) || \
78 defined(OS_NACL) || defined(OS_QNX)
79#define OS_POSIX 1
80#endif
81
82// Use tcmalloc
83#if (defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)) && \
84 !defined(NO_TCMALLOC)
85#define USE_TCMALLOC 1
86#endif
87
88// Compiler detection.
89#if defined(__GNUC__)
90#define COMPILER_GCC 1
91#elif defined(_MSC_VER)
92#define COMPILER_MSVC 1
93#else
94#error Please add support for your compiler in butil/build_config.h
95#endif
96
97// Processor architecture detection. For more info on what's defined, see:
98// http://msdn.microsoft.com/en-us/library/b0084kay.aspx
99// http://www.agner.org/optimize/calling_conventions.pdf
100// or with gcc, run: "echo | gcc -E -dM -"
101#if defined(_M_X64) || defined(__x86_64__)
102#define ARCH_CPU_X86_FAMILY 1
103#define ARCH_CPU_X86_64 1
104#define ARCH_CPU_64_BITS 1
105#define ARCH_CPU_LITTLE_ENDIAN 1
106#elif defined(_M_IX86) || defined(__i386__)
107#define ARCH_CPU_X86_FAMILY 1
108#define ARCH_CPU_X86 1
109#define ARCH_CPU_32_BITS 1
110#define ARCH_CPU_LITTLE_ENDIAN 1
111#elif defined(__ARMEL__)
112#define ARCH_CPU_ARM_FAMILY 1
113#define ARCH_CPU_ARMEL 1
114#define ARCH_CPU_32_BITS 1
115#define ARCH_CPU_LITTLE_ENDIAN 1
116#elif defined(__aarch64__)
117#define ARCH_CPU_ARM_FAMILY 1
118#define ARCH_CPU_ARM64 1
119#define ARCH_CPU_64_BITS 1
120#define ARCH_CPU_LITTLE_ENDIAN 1
121#elif defined(__pnacl__)
122#define ARCH_CPU_32_BITS 1
123#define ARCH_CPU_LITTLE_ENDIAN 1
124#elif defined(__MIPSEL__)
125#if defined(__LP64__)
126#define ARCH_CPU_MIPS64_FAMILY 1
127#define ARCH_CPU_MIPS64EL 1
128#define ARCH_CPU_64_BITS 1
129#define ARCH_CPU_LITTLE_ENDIAN 1
130#else
131#define ARCH_CPU_MIPS_FAMILY 1
132#define ARCH_CPU_MIPSEL 1
133#define ARCH_CPU_32_BITS 1
134#define ARCH_CPU_LITTLE_ENDIAN 1
135#endif
136#else
137#error Please add support for your architecture in butil/build_config.h
138#endif
139
140// Type detection for wchar_t.
141#if defined(OS_WIN)
142#define WCHAR_T_IS_UTF16
143#elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
144 defined(__WCHAR_MAX__) && \
145 (__WCHAR_MAX__ == 0x7fffffff || __WCHAR_MAX__ == 0xffffffff)
146#define WCHAR_T_IS_UTF32
147#elif defined(OS_POSIX) && defined(COMPILER_GCC) && \
148 defined(__WCHAR_MAX__) && \
149 (__WCHAR_MAX__ == 0x7fff || __WCHAR_MAX__ == 0xffff)
150// On Posix, we'll detect short wchar_t, but projects aren't guaranteed to
151// compile in this mode (in particular, Chrome doesn't). This is intended for
152// other projects using base who manage their own dependencies and make sure
153// short wchar works for them.
154#define WCHAR_T_IS_UTF16
155#else
156#error Please add support for your compiler in butil/build_config.h
157#endif
158
159#if defined(OS_ANDROID)
160// The compiler thinks std::string::const_iterator and "const char*" are
161// equivalent types.
162#define STD_STRING_ITERATOR_IS_CHAR_POINTER
163// The compiler thinks butil::string16::const_iterator and "char16*" are
164// equivalent types.
165#define BUTIL_STRING16_ITERATOR_IS_CHAR16_POINTER
166#endif
167
168#if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
169#define BUTIL_CXX11_ENABLED 1
170#endif
171
172#if !defined(BUTIL_CXX11_ENABLED)
173#define nullptr NULL
174#endif
175
176#define HAVE_DLADDR
177
178#endif // BUTIL_BUILD_CONFIG_H_
179