运行configure时如何覆盖环境变量？
在 Linux 的任何主要软件包中，运行 ./configure --help 将在最后输出：
Some influential environment variables:
CC C compiler command
CFLAGS C compiler flags
LDFLAGS linker flags, e.g. -L<lib dir> if you have libraries in a
nonstandard directory <lib dir>
CPPFLAGS C/C++ preprocessor flags, e.g. -I<include dir> if you have
headers in a nonstandard directory <include dir>
CPP C preprocessor
Use these variables to override the choices made by `configure' or to help
it to find libraries and programs with nonstandard names/locations.
How do I use those variables to include a directory?我尝试运行 ./configure --CFLAGS="-I/home/package/custom/" 和 ./configure CFLAGS="-I/home/package/custom/"，但是这些不起作用。有什么建议吗？
In any major package for Linux, running ./configure --help will output at the end:
Some influential environment variables:
CC C compiler command
CFLAGS C compiler flags
LDFLAGS linker flags, e.g. -L<lib dir> if you have libraries in a
nonstandard directory <lib dir>
CPPFLAGS C/C++ preprocessor flags, e.g. -I<include dir> if you have
headers in a nonstandard directory <include dir>
CPP C preprocessor
Use these variables to override the choices made by `configure' or to help
it to find libraries and programs with nonstandard names/locations.
How do I use these variables to include a directory? I tried running ./configure --CFLAGS="-I/home/package/custom/" and ./configure CFLAGS="-I/home/package/custom/", however these do not work. Any suggestions?
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-I需要使用的变量是CPPFLAGS，而不是CFLAGS。 （正如您复制的帮助消息中所说的那样。）CPP 代表“C 预处理器”，而不是 C++。所以：The variable you need to use for
-IisCPPFLAGS, notCFLAGS. (As it says right there in the help message you copied.) CPP stands for "C preprocessor", not C++. So:这些不是传递给配置的标志。这些是您需要设置的环境变量。例如
export CFLAGS="-I foo"。These are not flags passed to configure. These are environment variables you need to set. e.g.
export CFLAGS="-I foo".