工具：探測gcc預設include目錄
阿新 • • 發佈：2018-12-12
$ gcc -v -x c -E /dev/null
Using built-in specs.
[...]
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-linux-gnu/4.8/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.8/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
[...]
The GCC flags in order of specification:
| 參 數 | 說明 |
|---|---|
| -v | Enable verbose mode. In the preprocessor’s case, print the final form of the include path, among other things. |
| -x c | Tells GCC that the input is to be treated as C source code. To find the G++ include path, substitute -x c++. You should be able to do the same for all the other languages supported by your GCC installation, assuming those languages support the concept of preprocessing. |
| -E | Stop after preprocessing (it’s an empty source file, after all). |