gcc

GCC, the GNU Compiler Collection

The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Ada,
 Go, and D, as well as libraries for these languages (libstdc++,...). GCC was originally
 written as the compiler for the GNU operating system. The GNU system was developed to
 be 100% free software, free in the sense that it respects the user's freedom.


We strive to provide regular, high quality releases, which we want to work well on a
 variety of native and cross targets (including GNU/Linux), and encourage everyone to
 contribute changes or help testing GCC. Our sources are readily and freely available 
via Git and weekly snapshots.

https://gcc.gnu.org/onlinedocs/gcc-10.1.0/gcc/

https://gcc.gnu.org/onlinedocs/10.1.0/

https://gcc.gnu.org/

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gcc操作手册：

https://gcc.gnu.org/onlinedocs/gcc-10.1.0/gcc.pdf

gcc的安装：

https://gcc.gnu.org/install/

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gcc Host/Target 参数说明

https://gcc.gnu.org/install/specific.html

gcc编译

一步到位编译：gcc hello.c -o hello
预处理 -E (.i) 编译 -S (.s) 汇编-c (.o) 连接-o
预处理
gcc -E hello.c -o hello.i -E:仅执行编译预处理
-o:将结果输出并指定输出文件的文件名
编译为汇编代码
gcc -S hello.c(.i) -o hello.s -S：将C代码转换为汇编代码
汇编：
gcc -c hello.c -o hello.o -c：仅执行编译操作，不进行连接操作
连接：
gcc hello.o -o hello
-o:将结果输出并指定输出文件的文件名
-O0、-O1、-O2、-O3:编译优化选项的四个级别，-O0 表示没有优化, -O1 为默认值，-O3 优化级别最高
-g：只是编译器，在编译的时候，产生调试信息

gdb

https://linuxtools-rst.readthedocs.io/zh_CN/latest/tool/gdb.html

linux工具使用教程

https://linuxtools-rst.readthedocs.io/zh_CN/latest/tool/lsof.html