Hello, Windriver's diab C/++ compiler had this incredibly useful option for a long time: -ifoobar.h=dir/foobar.h This means to the preprocessor, "whenever you find #include "foobar.h" or #include <foobar.h> in the code, replace foobar.h with dir/foobar.h " This option makes all other header file search options obsolete, in fact the whole "search" is obsolete, which means compilation is fastest, and also if you have multiple files in the filesystem with the same name, it is trivial to point which is the one you want to include (with thousands of files and copies all over the place, it can be very difficult to arrange traditional -I options so that all the correct header files are picked up, and not the unwanted copies). Is anything like that planned for gcc? Possible? Thank you, Mark
