转储包括来自g ++的路径

Question

我正在尝试编写一个小的构建脚本 - 并且想要确定包含是否包含系统.所以我希望g ++告诉我它正在使用的包含路径.

cpp -v似乎是最好的镜头,但它并没有给我C++路径.

所以我尝试过:

g++ -Xpreprocessor -v  

哪个不能正常工作 - g ++捕获-v为它自己的详细输出.

谢谢,奥利弗

Answer 1

来自Jonathan Wakely的更好选择(也适用于clang):

g++ -E -x c++ - -v < /dev/null 
clang++ -E -x c++ - -v < /dev/null

我注意到cpp中有一个用于指定语言的标志.这就像一个魅力.

cpp -xc++ -v < /dev/null


#include "..." search starts here:
#include <...> search starts here:
 /usr/local/Cellar/gcc/4.7.0/gcc/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/../../../../include/c++/4.7.0
 /usr/local/Cellar/gcc/4.7.0/gcc/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/../../../../include/c++/4.7.0/x86_64-apple-darwin11.4.0
 /usr/local/Cellar/gcc/4.7.0/gcc/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/../../../../include/c++/4.7.0/backward
 /usr/local/Cellar/gcc/4.7.0/gcc/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/include
 /usr/local/include
 /usr/local/Cellar/gcc/4.7.0/gcc/include
 /usr/local/Cellar/gcc/4.7.0/gcc/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/include-fixed
 /usr/include
 /System/Library/Frameworks
 /Library/Frameworks
End of search list.

刚刚注意到它对于-x c++ to be -xc++gcc 4.2 非常重要