Optimize even more. GCC performs nearly all supported optimizations that do not involve a space-speed tradeoff. The compiler does not perform loop unrolling or function inlining when you specify `-O2 '. As comp
-O1 Optimize. Optimizing compilation takes somewhat more time, and a lot more memory for a large function. -O2 Optimize even more. GCC performs nearly all supported optimizations that do not involve a space-speed tradeoff. As compared to -O, this option increases both compilation time and the...
Optimize even more. GCC performs nearly all supported optimizations that do not involve a space-speed tradeoff. The compiler does not perform loop unrolling or function inlining when you specify `-O2 '. As compared to `-O ', this option increases both compilation time and the performance of t...
-fbranch-target-load-optimize 在序言/结尾线程之前执行分支目标寄存器加载优化。 目标寄存器的使用通常只能在重新加载期间公开,因此将负载提升出循环并进行块间调度需要单独的优化过程。 -fbranch-target-load-optimize2 在序言/结尾线程之后执行分支目标寄存器加载优化。 --param name=value 在某些地方,GCC 使用各种常...
#include:这个就是把后面的文件直接拷贝到预处理指令的位置,当然这里也会处理依赖include的问题,比如A文件 include B文件,而B文件又include了C文件,那么在A里面是看到C文件的内容的。还有有个盲区就是,include是可以include xxx.c的,这个在C语言的语法上是没有任何问题的,大家千万别以为只能C文件 include 头文件。
cpp 文件) -O0 Minimum optimization 最小优化级别 -O1 Restricted optimization for debugging 受限的调试级别优化 -O2 High optimization 高优化 -O3 Maximum optimization 最大优化 -Ospace Optimize for codesize 对代码大小进行优化 -Otime Optimize for maximum performance 优化最大优化级别的运行时间 --cpu <...
gcc -Wchar-subscripts test_signed_char.ctest_signed_char.c: In function `main':test_signed_char.c:13: warning: array subscript has type `char' 其输出结果:-1-41974761从输出结果来看Solaris 9/gcc 3.2上char默认实现类型为signed char;在Windows XP/gcc-3.4.2上也是一样。Windows上的输出结果:-116...
-GD 为 Windows DLL 进行优化 optimize for Windows DLL -GB 为混合模型进行优化(默认) optimize for blended model (default) -EHa 启用异步 C++ 异常处理 enable asynchronous C++ EH -Gd __cdecl 调用约定 __cdecl calling convention -EHc extern“C”默认为 nothrow extern "C" defaults to nothrow ...
Collaborative sourcing: How GCC group organizations can optimize their procurement spendby Haroon SheikhDr. Walid TohmeAshish LabrooAnna Germanos
[-] 启用增量编译 enable incremental compilation-Gz __stdcall 调用约定 __stdcall calling convention-Gm[-] 启用最小重新生成 enable minimal rebuild-GA 为 Windows 应用程序进行优化 optimize for Windows Application-Gf 启用字符串池 enable string pooling-QIfdiv[-] 启用 Pentium FDIV 修复 enable Pentium ...