configure: error: gmp.h header not found when building glpk

Question

When trying to build glpk-4.61 on Mac OS X with

./configure --with-gmp

I get the following error message:

checking gmp.h usability... no checking gmp.h presence... no checking for gmp.h... no configure: error: gmp.h header not found

There were no issues installing GMP, and the header file gmp.h is present in /usr/local/include as expected.

Answer 1

config.log告诉我的不过是我已经知道的，gcc无法找到gmp.h（当试图预处理conftest.c时）。但是，可以使用cpp -v来检查c预处理器使用哪些包含路径，结果发现Xcode弄乱了它们。解决方案是运行xcode-select --install，这会添加通常的包含路径。