是否可以指示标记以在gcc的Makefile中包含音频文件目录？

Question

I would like to know if it's possible to indicate for gcc some flag that include a directory for different kind of files, like .wav or .txt. Then in my code I wouldn't need to indicate the directory to read the file.

Answer 1

Pass it as a macro on the compile line, eg:

#include <stdio.h>

#define qstr(a) str(a)
#define str(a) #a

int main(void)
{
    printf("The path is %s\n", qstr(MY_FILE_PATH));
    return 0;
}

Then compile as:

gcc -DMY_FILE_PATH="`pwd`/mymediadir/mywavfilesdir" test.c -o test

When run gives:

./test
The path is /home/joe/tmp/mymediadir/mywavfilesdir