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我已经用自制软件安装了 libfmt。文件可以在/usr/local/lib/libfmt.dylib和中找到/usr/local/include/fmt。形式上，它们是指向/usr/local/Cellar/....

G++ 默认不搜索 /usr/local/include/ 和 /usr/local/lib/。而且我不想在项目级别添加它们。

❯❯❯ g++-9 -print-search-dirs
install: /usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/
programs: =/usr/local/Cellar/gcc/9.3.0_1/libexec/gcc/x86_64-apple-darwin18/9.3.0/:/usr/local/Cellar/gcc/9.3.0_1/libexec/gcc/x86_64-apple-darwin18/9.3.0/:/usr/local/Cellar/gcc/9.3.0_1/libexec/gcc/x86_64-apple-darwin18/:/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/:/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/:/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/../../../../../../x86_64-apple-darwin18/bin/x86_64-apple-darwin18/9.3.0/:/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/../../../../../../x86_64-apple-darwin18/bin/
libraries: =/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/:/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/../../../../../../x86_64-apple-darwin18/lib/x86_64-apple-darwin18/9.3.0/:/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/../../../../../../x86_64-apple-darwin18/lib/:/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/../../../x86_64-apple-darwin18/9.3.0/:/usr/local/Cellar/gcc/9.3.0_1/lib/gcc/9/gcc/x86_64-apple-darwin18/9.3.0/../../../
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1 回答 1

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您可以通过在 shell 中设置相关的环境变量来做到这一点，例如：

export CPATH=...
export LIBRARY_PATH=...

完整的文档在这里

于 2020-07-07T15:26:51.177 回答