From: Nicholas Piggin Date: Fri, 14 Sep 2018 05:08:54 +0000 (+1000) Subject: powerpc: avoid -mno-sched-epilog on GCC 4.9 and newer X-Git-Tag: v4.20-rc1~97^2~188 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=6977f95e63b9b3fb4a5973481a800dd9f48a1338;p=linux.git powerpc: avoid -mno-sched-epilog on GCC 4.9 and newer Signed-off-by: Nicholas Piggin Reviewed-by: Joel Stanley Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index be47cf8a0798..07d9dce7eda6 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -165,8 +165,12 @@ CC_FLAGS_FTRACE := -pg ifdef CONFIG_MPROFILE_KERNEL CC_FLAGS_FTRACE += -mprofile-kernel endif -# Work around a gcc code-gen bug with -fno-omit-frame-pointer. -CC_FLAGS_FTRACE += -mno-sched-epilog +# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8 +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199 +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828 +ifneq ($(cc-name),clang) +CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) +endif endif CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))