On Mon, Aug 31, 2020 at 4:34 PM Giacomo Tesio <giac...@tesio.it> wrote: > > Hello everybody! > > To cleanup my port of GCC (9.2.0) to Jehanne OS (http://jehanne.io) > I'd like to add a `--posixly` command line options to the gcc driver > that should be expanded to a couple of -isystem and -L options > to ease the compilation of POSIX programs (Jehanne is a Plan 9 > derivative so it's not a POSIX system). > > So I defined in the gcc/config/jehanne.h (see attachment) the macros > LINK_SPEC, LIB_SPEC and CPP_SPEC that substitute such command line > options as required.
You might need to add it to a .opt file like it is done in darwin.opt: ; Driver options. all_load Driver RejectNegative Alias(Zall_load) Load all members of archive libraries, rather than only those that satisfy undefined symbols. Thanks, Andrew Pinski > > What's weird is that, if I dump the specs file with `gcc -dumpspecs` > and then load it with `gcc -specs=dump` it works like a charm, > properly translating the --posixly option. > > However without the -specs option, it can't recognise such option. > > I have no idea of what I'm missing. > I tried to put the dump into PREFIX/lib/gcc/x86_64-jehanne/9.2.0/specs > (also in the attachments) but it doesn't change anything. > Yet, by using the -specs= option it works. > > > Am I missing something obvious? > > Thanks for your help and sorry if the issue is dumb: I tried my best to > understand the Gcc Internals but I was unable to fix this. > > > Giacomo
