Commit 65c059bc authored by Andrew Donnellan's avatar Andrew Donnellan Committed by Michael Ellerman
Browse files

powerpc: Enable support for GCC plugins 



Enable support for GCC plugins on powerpc.

Add an additional version check in gcc-plugins-check to advise users to
upgrade to gcc 5.2+ on powerpc to avoid issues with header files (gcc <=
4.6) or missing copies of rs6000-cpus.def (4.8 to 5.1 on 64-bit
targets).

Signed-off-by: default avatarAndrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent eac6f8b0

arch/powerpc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -93,6 +93,7 @@ config PPC 
	select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL

	select HAVE_FUNCTION_TRACER

	select HAVE_FUNCTION_GRAPH_TRACER

	select HAVE_GCC_PLUGINS

	select SYSCTL_EXCEPTION_TRACE

	select VIRT_TO_BUS if !PPC64

	select HAVE_IDE

scripts/Makefile.gcc-plugins

+8 −0
Original line number Diff line number Diff line
@@ -47,6 +47,14 @@ gcc-plugins-check: FORCE 
ifdef CONFIG_GCC_PLUGINS

  ifeq ($(PLUGINCC),)

    ifneq ($(GCC_PLUGINS_CFLAGS),)

      # Various gccs between 4.5 and 5.1 have bugs on powerpc due to missing

      # header files. gcc <= 4.6 doesn't work at all, gccs from 4.8 to 5.1 have

      # issues with 64-bit targets.

      ifeq ($(ARCH),powerpc)

        ifeq ($(call cc-ifversion, -le, 0501, y), y)

	  @echo "Cannot use CONFIG_GCC_PLUGINS: plugin support on gcc <= 5.1 is buggy on powerpc, please upgrade to gcc 5.2 or newer" >&2 && exit 1

        endif

      endif

      ifeq ($(call cc-ifversion, -ge, 0405, y), y)

	$(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true

	@echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1

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