On Sat, Feb 2, 2013 at 11:03 AM, Brian Drummond <brian@xxxxxxxxxxxxxxxxxx> wrote: > > A better one would be to allow the two uses to peacefully coexist. This > was the case until gcc4.4 or later since neither -P option is new. But > something seems to have changed in the command line parsing strategy > since then; I am looking for some idea what changed, and how to modify > GHDL to fit in with that strategy. The option processing has been overhauled so that the driver can do the right thing more often. All the language-specific options are passed to the AWK script opt-gather.awk. It produces a file optionlist, which is then processed by additional AWK scripts into options.h, options.c, and options-save.c. > So, what mechanism is supposed to route -P<dir> to ghdl or ghdl1, and -P > alone to the other compilers, and how (in the GHDL front end) could it > be broken? Despite my comments about the option processing above, that sounds like a specs issue. Look in lang-specs.h for your frontend and see what it does with -P (look for %(P and the like). The specs language is described at http://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html . Ian
