針對特定 CPU 架構進行編譯
編寫 C 或 C 程式碼時，通常需要了解您所針對的目標 CPU 架構編譯。此資訊可用於優化程式碼效能或確保與特定硬體的兼容性。不同的編譯器利用各種非標準預處理器定義來區分 CPU 架構（例如 MSVS 中的 _M_X86、i386__ 和 GCC 中的 __arm）。
標準偵測方法
不幸的是，在編譯時偵測CPU架構沒有通用標準。但是，以下外部函數可以偵測各種編譯器的架構：
extern "C" {
const char *getBuild() {
#if defined(__x86_64__) || defined(_M_X64)
return "x86_64";
#elif defined(i386) || defined(__i386__) || defined(__i386) || defined(_M_IX86)
return "x86_32";
#elif defined(__ARM_ARCH_2__)
return "ARM2";
#elif defined(__ARM_ARCH_3__) || defined(__ARM_ARCH_3M__)
return "ARM3";
#elif defined(__ARM_ARCH_4T__) || defined(__TARGET_ARM_4T)
return "ARM4T";
#elif defined(__ARM_ARCH_5_) || defined(__ARM_ARCH_5E_)
return "ARM5"
#elif defined(__ARM_ARCH_6T2_) || defined(__ARM_ARCH_6T2_)
return "ARM6T2";
#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__)
return "ARM6";
#elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__)
return "ARM7";
#elif defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__)
return "ARM7A";
#elif defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__)
return "ARM7R";
#elif defined(__ARM_ARCH_7M__)
return "ARM7M";
#elif defined(__ARM_ARCH_7S__)
return "ARM7S";
#elif defined(__aarch64__) || defined(_M_ARM64)
return "ARM64";
#elif defined(mips) || defined(__mips__) || defined(__mips)
return "MIPS";
#elif defined(__sh__)
return "SUPERH";
#elif defined(__powerpc) || defined(__powerpc__) || defined(__powerpc64__) || defined(__POWERPC__) || defined(__ppc__) || defined(__PPC__) || defined(_ARCH_PPC)
return "POWERPC";
#elif defined(__PPC64__) || defined(__ppc64__) || defined(_ARCH_PPC64)
return "POWERPC64";
#elif defined(__sparc__) || defined(__sparc)
return "SPARC";
#elif defined(__m68k__)
return "M68K";
#else
return "UNKNOWN";
#endif
}
}以上是如何確定我的 C/C 程式碼正在編譯的 CPU 架構？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
