diff options
| author | Andrew Donnellan <andrew.donnellan@au1.ibm.com> | 2016-12-06 09:28:00 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-02-03 13:59:28 +0300 |
| commit | 65c059bcaa73197ca71e8d4cc9a6c903560506c1 (patch) | |
| tree | 45509696e28dba816368254c6372b0e9d1f31a7b | |
| parent | eac6f8b0c7adb003776dbad9d037ee2fc64f9d62 (diff) | |
| download | linux-65c059bcaa73197ca71e8d4cc9a6c903560506c1.tar.xz | |
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: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/Kconfig | 1 | ||||
| -rw-r--r-- | scripts/Makefile.gcc-plugins | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 33f5b8380a7d..bfdd80e7754c 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -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 diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins index 26c67b735dc9..9835a757d52a 100644 --- a/scripts/Makefile.gcc-plugins +++ b/scripts/Makefile.gcc-plugins @@ -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 |