On Wed, Sep 05, 2012 at 03:14:40PM +0000, Joseph S. Myers wrote: > On Wed, 5 Sep 2012, Basile Starynkevitch wrote: > > > const char* plugin_build_triplet (void); > > I think if you want to tell the plugin about the build triplet in this > sort of way, there is some fundamental confusion involved. A compiler > built for a given host and target pair should behave the same independent > of what system it was built on (what the build triplet was) - and > similarly, such a compiler could use plugins built on different systems > from the build system on which the compiler itself was built (whereas all > plugins would need to be configured for the same host and target as the > compiler).
I agree that the build triplet is not important and could stay secret to plugins. However, we still need: const char* plugin_host_triplet (void); const char* plugin_target_triplet (void); and I still have no clues of how to get that information (so I am not yet able to submit a patch). > > The target triplet is proper information for a plugin to enquire about. > The build triplet definitely is not. The host triplet probably isn't > either (compilers for the same target, and different hosts, should also > behave the same) although there may be some limited use cases where your > plugin is explicitly not following the conventions of GCC proper regarding > host-independence. Your use case for testing sounds like something where > the build infrastructure for your plugin should be determining what to do > depending on the triplets, rather than the plugin itself knowing about > them. Well, to take a concrete example, I don't understand well how on Debian/Sid can I know that the gcc-4.6-plugin-dev package is for x86-64-unknown-linux. the files provided by that package don't tell much. Or are you suggesting I should use the packaging metainformation? Ian Taylor suggested in http://gcc.gnu.org/ml/gcc/2012-08/msg00339.html to use CROSS_DIRECTORY_STRUCTURE but I can't find it there. Regards. -- Basile STARYNKEVITCH http://starynkevitch.net/Basile/ email: basile<at>starynkevitch<dot>net mobile: +33 6 8501 2359 8, rue de la Faiencerie, 92340 Bourg La Reine, France *** opinions {are only mines, sont seulement les miennes} ***
