ali hagigat <hagigatali@xxxxxxxxx> writes: > Thank you for the explanation but you did not explain the role of > "include_next" here!! You only insisted on some path is ignored!!! That is not what Jonathan said. The -I option is ignored. The path is not ignored, because the -isystem option is not ignored. > I know that when we use -I and there is the same pathname in the > system , -I is ignored!! Yes, -I is ignored. > But WHERE "include_next" is used? Install gcc. Look for .h files in the gcc install tree. Look to see which ones use #include_next. Think about what it means. > Is it used with -isystem and in the file it is introducing ONLY? The -isystem option is independent of the #include_next directive, except in the sense that -isystem gives directories for #include_next to search. > Please rewrite this part of gcc manual, it is not clear at all!! Which part specifically is not clear? As far as I know the -I and -isystem options and the #include_next directive are described correctly. Ian
