> How can I found that which stdio.h is compiler looking for? Pass the --verbose flag to gcc, and you'll get something like this (amongst other output): $ gcc program.c --verbose (...) ignoring nonexistent directory "/usr/local/include/i486-linux-gnu" ignoring nonexistent directory "/usr/lib/gcc/i486-linux-gnu/4.4.1/../../../../i486-linux-gnu/include" ignoring nonexistent directory "/usr/include/i486-linux-gnu" #include "..." search starts here: #include <...> search starts here: /usr/local/include /usr/lib/gcc/i486-linux-gnu/4.4.1/include /usr/lib/gcc/i486-linux-gnu/4.4.1/include-fixed /usr/include End of search list. (...) John G >
