With the following include statement and the associated header file in the same directory as the .c file: #include "stdio.h" gcc will compile successfully using the following $gcc -x none file.c With the following include statement and the associated header file in /usr/include #include <stdio.h" gcc will not compile the file using any of the following $gcc -x c file.c $gcc -x none file.c $gcc -std=c89 file.c GES -- View this message in context: http://www.nabble.com/Inconsistent-Compilation-t1158935.html#a3041947 Sent from the gcc - Help forum at Nabble.com.