查看当前系统gcc

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❯ gcc --version
Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 13.0.0 (clang-1300.0.29.30)
Target: arm64-apple-darwin20.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

当前默认编译器是clang

安装GCC

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❯ brew install gcc

安装完成后看到当前gcc安装的版本是12.2.0

安装目录在/opt/homebrew/Cellar/gcc/12.2.0

设置gcc别名

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alias gcc='gcc-12'
alias g++='g++-12'
alias c++='c++-12'
alias cpp='cpp-12'