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Tue, 21 Jul 2020 06:21:57 -0700 (PDT) Date: Tue, 21 Jul 2020 06:21:55 -0700 From: Guenter Roeck To: Joerg Roedel Cc: Guo Ren , linux-csky@vger.kernel.org, linux-kernel@vger.kernel.org, Joerg Roedel Subject: Re: [PATCH] csky: Fix build with upstream gcc Message-ID: <20200721132155.GA27649@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 21, 2020 at 01:23:14PM +0200, Joerg Roedel wrote: > From: Joerg Roedel > > Building a kernel for the CSKY architecture with CONFIG_FRAME_POINTER > set requires a gcc supporting the non-upstream '-mbacktrace' option. > Check for the '-mbacktrace' option before enabling CONFIG_FRAMEPOINTER > and fix building CSKY with an upstream gcc compiler. > > Signed-off-by: Joerg Roedel Reviewed-by: Guenter Roeck Tested-by: Guenter Roeck > --- > arch/csky/Kconfig | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig > index bd31ab12f77d..1622e1c56026 100644 > --- a/arch/csky/Kconfig > +++ b/arch/csky/Kconfig > @@ -8,7 +8,7 @@ config CSKY > select ARCH_HAS_SYNC_DMA_FOR_DEVICE > select ARCH_USE_BUILTIN_BSWAP > select ARCH_USE_QUEUED_RWLOCKS if NR_CPUS>2 > - select ARCH_WANT_FRAME_POINTERS if !CPU_CK610 > + select ARCH_WANT_FRAME_POINTERS if (!CPU_CK610 && STACKTRACE_SUPPORT) > select COMMON_CLK > select CLKSRC_MMIO > select CSKY_MPINTC if CPU_CK860 > @@ -125,7 +125,7 @@ config MMU > def_bool y > > config STACKTRACE_SUPPORT > - def_bool y > + def_bool $(success,echo 'int foo(void) { return 0; }' | $(CC) -mbacktrace -x c - -c -o /dev/null) > > config TIME_LOW_RES > def_bool y > -- > 2.27.0 >