ali hagigat <hagigatali@xxxxxxxxx> writes: > This option does not make sense! When we use -I option, it is not used > for â#include <file >â. Is that right? No, that is not correct. A -I option is used for both #include "FILE" and #include <FILE>. > Or -I search path is used for â#include <file >â but the file is > tagged as a system file? That is true. > My another concern is the explanation of -I option!!: > "If a standard system include directory, or a directory specified with > â-isystemâ, is also specified with â-Iâ, the â-Iâ option will be > ignored." > > In this case -I option and the directory after that are not ignored!! > -I is replaced with -isystem. When you have written "ignored", it > suggests that -I does not be considered. I'm not sure I understand the distinction you are drawing. Are you saying that the compiler behaves as though the -I were replaced with -isystem? As far as I know, that is not the case. I believe the compiler really does act as though the -I option were not specified. > Then the manual continues: > "The directory will still be searched but as a system directory at its > normal position in the system > include chain" > > When a beginner reads your sentence he asks what is the system include > chain? and what is the normal position? Is it the point where -I has > been used on the command line? or it is pointing to the directory of > the system which is used by gcc when searching headers. Patches welcome. Ian
