Re: [PATCH] kbuild: Disable LD_DEAD_CODE_DATA_ELIMINATION with ftrace & GCC <= 4.7

On Fri, Jan 11, 2019 at 3:11 AM Paul Burton wrote: > > Hi Masahiro, > > On Thu, Jan 10, 2019 at 11:00:49AM +0900, Masahiro Yamada wrote: > > On Thu, Jan 10, 2019 at 8:16 AM Paul Burton wrote: > > > When building using GCC 4.7 or older, -ffunction-sections & the -pg flag > > > used by ftrace are

Re: [PATCH] kbuild: Disable LD_DEAD_CODE_DATA_ELIMINATION with ftrace & GCC <= 4.7

Hi Masahiro, On Thu, Jan 10, 2019 at 11:00:49AM +0900, Masahiro Yamada wrote: > On Thu, Jan 10, 2019 at 8:16 AM Paul Burton wrote: > > When building using GCC 4.7 or older, -ffunction-sections & the -pg flag > > used by ftrace are incompatible. This causes warnings or build failures > > (where

Re: [PATCH] kbuild: Disable LD_DEAD_CODE_DATA_ELIMINATION with ftrace & GCC <= 4.7

On Thu, Jan 10, 2019 at 8:16 AM Paul Burton wrote: > > When building using GCC 4.7 or older, -ffunction-sections & the -pg flag > used by ftrace are incompatible. This causes warnings or build failures > (where -Werror applies) such as the following: > > arch/mips/generic/init.c: > error:

[PATCH] kbuild: Disable LD_DEAD_CODE_DATA_ELIMINATION with ftrace & GCC <= 4.7

When building using GCC 4.7 or older, -ffunction-sections & the -pg flag used by ftrace are incompatible. This causes warnings or build failures (where -Werror applies) such as the following: arch/mips/generic/init.c: error: -ffunction-sections disabled; it makes profiling impossible This