On 26 September 2011 11:50, ali hagigat wrote: > So '-I." is the same as '-I-' except that the current directory is > searched too, isn't it? Read the effects of -I- carefully. 1. Any directories specified with -I options before -I- are searched only for headers requested with "#include "file""; they are not searched for "#include <file>"." Does -I. do that? 2. In addition, -I- inhibits the use of the directory of the current file directory as the first search directory for "#include "file"". Does -I. do that?