John Love-Jensen wrote: > Hi Sebastian, > >> Which command line switch of gcc is preferred for adding include directories? > > -I<dir> for user includes. > > -isystem <dir> for system includes. > >> And: What's the reason that -I modifies system headers includes? > > It doesn't. > > -I includes are searched before system includes, for #include "blah.h". No, they are also searched before system includes for #include <blah.h>: $ cat test.c #include <stdlib.h> $ cat stdlib.h #error bla $ gcc -c -I. -o test.o test.c In file included from test.c:1: ./stdlib.h:1:2: Error: #error bla There is "-iquote" which only modifies "" includes, but nobody uses it. And it's hard to use if there's no stable name between gcc versions. > That would only be a problem if #include "process.h" is used, when #include > <process.h> was intended. Well, no. There is no longer a difference between "process.h" and <process.h> if you use "-I.". That's my problem :)
