On Sat, 2013-02-02 at 11:38 -0800, Ian Lance Taylor wrote: > On Sat, Feb 2, 2013 at 11:03 AM, Brian Drummond > <brian@xxxxxxxxxxxxxxxxxx> wrote: > > 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 . > Thanks for such a quick answer! Here is the complete file ... (shorn of the license) -------------------------------------------------------------------------- /* This is the contribution to the `default_compilers' array in gcc.c for GHDL. */ {".vhd", "@vhdl", 0, 0, 0}, {".vhdl", "@vhdl", 0, 0, 0}, {"@vhdl", "ghdl1 %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}", 0, 0, 0}, -------------------------------------------------------------------------- As it has nothing whatsoever to do with options, I had no idea that it ought to! I will look at lang-specs from some other front ends and try to understand the doc you linked. Looks like a good starting point, but questions to follow, probably. One more question for now : has lang-specs been significantly changed in the 4.4 to 4.7 timeframe? Thanks again, - Brian
