Hi! https://bugzilla.redhat.com/show_bug.cgi?id=910926 reports that plugins aren't usable on arm, because arm-cores.def isn't installed into the plugins directory. arm-cores.def can't be included in tm_file list, because we don't want to include it directly, nor in HeaderInclude in arm.opt (that breaks the build). rs6000 has similar issue with its rs6000-builtin.def, and solves this by adding content to TM_H in Makefile fragment.
Thus, the following patch does the same for arm (and apparently aarch64 has the same issue). Ok for trunk? 2013-03-06 Jakub Jelinek <ja...@redhat.com> * config/aarch64/t-aarch64 (TM_H, OPTIONS_H_EXTRA): Add aarch64-cores.def. * config/arm/t-arm (TM_H, OPTIONS_H_EXTRA): Add arm-cores.def. --- gcc/config/aarch64/t-aarch64.jj 2013-02-24 19:44:07.000000000 +0100 +++ gcc/config/aarch64/t-aarch64 2013-03-06 09:42:31.568042231 +0100 @@ -18,6 +18,9 @@ # along with GCC; see the file COPYING3. If not see # <http://www.gnu.org/licenses/>. +TM_H += $(srcdir)/config/aarch64/aarch64-cores.def +OPTIONS_H_EXTRA += $(srcdir)/config/aarch64/aarch64-cores.def + $(srcdir)/config/aarch64/aarch64-tune.md: $(srcdir)/config/aarch64/gentune.sh \ $(srcdir)/config/aarch64/aarch64-cores.def $(SHELL) $(srcdir)/config/aarch64/gentune.sh \ --- gcc/config/arm/t-arm.jj 2013-01-11 09:03:13.000000000 +0100 +++ gcc/config/arm/t-arm 2013-03-06 09:41:09.607528642 +0100 @@ -18,6 +18,9 @@ # along with GCC; see the file COPYING3. If not see # <http://www.gnu.org/licenses/>. +TM_H += $(srcdir)/config/arm/arm-cores.def +OPTIONS_H_EXTRA += $(srcdir)/config/arm/arm-cores.def + # All md files - except for arm.md. # This list should be kept in alphabetical order and updated whenever an md # file is added or removed. Jakub [A