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Wrap COMPILER macros. (#514)

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Some command line or build systems may already set these (eg, bazel) so
make sure that takes priority.

Fixes #513
This commit is contained in:
Dominic Hamon 2018-01-11 17:22:45 -08:00 committed by GitHub
parent e1c3a83b81
commit 9f5694ceb6
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 28 additions and 22 deletions
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50
src/internal_macros.h
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@ -11,29 +11,35 @@
#endif
#if defined(__clang__)
#define COMPILER_CLANG
#if !defined(COMPILER_CLANG)
#define COMPILER_CLANG
#endif
#elif defined(_MSC_VER)
#define COMPILER_MSVC
#if !defined(COMPILER_MSVC)
#define COMPILER_MSVC
#endif
#elif defined(__GNUC__)
#define COMPILER_GCC
#if !defined(COMPILER_GCC)
#define COMPILER_GCC
#endif
#endif
#if __has_feature(cxx_attributes)
#define BENCHMARK_NORETURN [[noreturn]]
#define BENCHMARK_NORETURN [[noreturn]]
#elif defined(__GNUC__)
#define BENCHMARK_NORETURN __attribute__((noreturn))
#define BENCHMARK_NORETURN __attribute__((noreturn))
#elif defined(COMPILER_MSVC)
#define BENCHMARK_NORETURN __declspec(noreturn)
#define BENCHMARK_NORETURN __declspec(noreturn)
#else
#define BENCHMARK_NORETURN
#define BENCHMARK_NORETURN
#endif
#if defined(__CYGWIN__)
#define BENCHMARK_OS_CYGWIN 1
#define BENCHMARK_OS_CYGWIN 1
#elif defined(_WIN32)
#define BENCHMARK_OS_WINDOWS 1
#define BENCHMARK_OS_WINDOWS 1
#elif defined(__APPLE__)
#include "TargetConditionals.h"
#include "TargetConditionals.h"
#if defined(TARGET_OS_MAC)
#define BENCHMARK_OS_MACOSX 1
#if defined(TARGET_OS_IPHONE)
@ -41,36 +47,36 @@
#endif
#endif
#elif defined(__FreeBSD__)
#define BENCHMARK_OS_FREEBSD 1
#define BENCHMARK_OS_FREEBSD 1
#elif defined(__NetBSD__)
#define BENCHMARK_OS_NETBSD 1
#define BENCHMARK_OS_NETBSD 1
#elif defined(__linux__)
#define BENCHMARK_OS_LINUX 1
#define BENCHMARK_OS_LINUX 1
#elif defined(__native_client__)
#define BENCHMARK_OS_NACL 1
#define BENCHMARK_OS_NACL 1
#elif defined(EMSCRIPTEN)
#define BENCHMARK_OS_EMSCRIPTEN 1
#define BENCHMARK_OS_EMSCRIPTEN 1
#elif defined(__rtems__)
#define BENCHMARK_OS_RTEMS 1
#define BENCHMARK_OS_RTEMS 1
#endif
#if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
&& !defined(__EXCEPTIONS)
#define BENCHMARK_HAS_NO_EXCEPTIONS
#define BENCHMARK_HAS_NO_EXCEPTIONS
#endif
#if defined(COMPILER_CLANG) || defined(COMPILER_GCC)
#define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
#define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
#else
#define BENCHMARK_MAYBE_UNUSED
#define BENCHMARK_MAYBE_UNUSED
#endif
#if defined(COMPILER_GCC) || __has_builtin(__builtin_unreachable)
#define BENCHMARK_UNREACHABLE() __builtin_unreachable()
#define BENCHMARK_UNREACHABLE() __builtin_unreachable()
#elif defined(COMPILER_MSVC)
#define BENCHMARK_UNREACHABLE() __assume(false)
#define BENCHMARK_UNREACHABLE() __assume(false)
#else
#define BENCHMARK_UNREACHABLE() ((void)0)
#define BENCHMARK_UNREACHABLE() ((void)0)
#endif
#endif // BENCHMARK_INTERNAL_MACROS_H_