gcc assembler options

-o0 -o1 -o2 -o3 4 levels of compiler optimization options,-o0 means no optimizations,-o1 defaults,-O3 optimization level most (here is Capital letter O) Optimization Options (Source: http://blog.csdn.net/Sodier/article/details/452566) This part of the content can be divided into two parts, part of this is to have the compiler analyze the code, and the other part is that we can make some information about

Common gcc/g ++ commands and gcc Command Options Common options for gcc/g ++ commands (option description) -O FILE specifies the output FILE name. This option is not required during compilation of the target code. If FILE is not specified, the default FILE name is a. out. -C

, GMP version5.1.3, MPFR version3.1.2-P3, MPC version1.0.1GGC Heuristics:--param ggc-min-expand=98--param ggc-min-heapsize=128190Ignoring nonexistent directory"/usr/local/include/i386-linux-gnu"Ignoring nonexistent directory"/usr/lib/gcc/i686-linux-gnu/4.8/. /.. /.. /.. /i686-linux-gnu/include"#include"..."search starts here: #includeSearch starts here:/usr/lib/gcc/i686-linux-gnu/4.8/include/usr/local/inclu

unexpected place, loop statements may become everywhere because of loop expansion. All these are a nightmare for debugging. It is recommended that you do not use any optimization options during debugging. optimization is considered only when the program is finally released. Acceleration The process of converting source code into executable files involves many intermediate steps, including preprocessing, compilation, compilation, and connection. These

the level of debug information: Add a level after the specified debug format:such as:-GGDB2, etc., 0 means no debug information. When using-gdwarf-2, because the earliest format is-GDWARF2, it causes confusion, so you need to use a-glevel to specify the level of debug information, and other formatting options can also be assigned a different level.GCC can use the-P option to specify the build information for Porf use.

-compilation command to insert the included files to the pre-compilation command. This process is performed recursively, And the included files may contain other files. 4. Delete all comments // and /**/; 5. Add the row number and file ID, for example, #2 "hello. C "2, so that the compiler can generate the line number information for debugging during compilation and display the line number information during compilation errors or warnings; 6. Keep all # pragma compiler instructions because the c

command is not executed. -EOnly for preprocessing, without compilation, compilation, and linking. As shown in. -SOnly compiled to the assembly language, without assembly and link. As shown in. -CCompile and assemble the code to the target without link. As shown in. -PipeUse MPs queues instead of temporary files. -CombineMultiple source files are passed to the assembler at a time. 3. Other GCC

gcc,g++ common compilation options in Linux-X language filenameSet the language used by the file, so that the suffix name is invalid for later multiple valid. That is, according to the Convention, the C language suffix name is. c, and the C + + suffix name is. C or. cpp, if you are very personality, decide the suffix name of your C code file is. Pig Haha, then you have to use this parameter, this parameter

with-E. Sometimes, the analysis program is very convenient to use.-MGenerate the information associated with the document. You can use gcc-M hello. c to test any source code that contains the target document.-MMIt is the same as the one above, but it will ignore the dependency caused by # include -MDIt is the same as-M, but the output will be imported into the. d document.-MMDIt is the same as-MM, but the output will be imported into the. d document.

GCC Preprocessor options Source:Author:Release date:Font:[LargeMediumSmall] Preprocessor Option)The following options are for the c Preprocessor, which is used to process the C source file before official compila

GccG ++ common compilation options GCC and G ++ common compilation options in Linux-X language filename　Set the language used by the file to make the suffix invalid and valid for later versions. that is, according to the Conventions, the C language suffix is. c, and C ++'s suffix is. C or. CPP. If you have a personality, the suffix of your C code file is

- COnly the target file (. o) is generated and is not connected. % gcc-c main.c % g++-C reciprocal.cpp - I.You can specify a directory for header files % g++-c-i. /include Reciprocal.cpp - DSet macro definition % g++-c-d ndebug reciprocal.cpp% g++-c-d ndebug=3 reciprocal.cpp - oOptimization level, the default optimization level is 2 % g++-c-o2 reciprocal.cpp - oconnecting programs, generating executable How to specify the default header file

information about the file association. Contains all the original code that the target file depends on you can use Gcc-m hello.cTo test it, it's very simple. 　　 -mmThe same as the one above, but he will ignore the dependency caused by #i nclude. 　　 -mdSame as-M, but the output will be imported into the. d file 　　 -mmdSame as-mm, but the output will be imported into the. d file. 　　 -wa,optionThis option passes option to the

Uncommon but useful GCC command line options (2)GuideThe gcc compiler provides a list of almost countless command line options. Of course, no one has ever used or mastered all of its command line options, but there are some command line