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From: Antony Pavlov <antonynpavlov@gmail.com>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: powerpc-linux-gnu-gcc: error: unrecognized command line option ‘-mno-spe’
Date: Wed, 23 Jan 2019 15:01:53 +0300	[thread overview]
Message-ID: <20190123150153.11a91063828b62bfd89c9bdf@gmail.com> (raw)

Hi Sascha!

I'm playing with MAKEALL script to build as many defconfigs as possible.
My build environment is base on Debian Buster.
Debian Buster has cross compiler for PowerPC32.

Alas I have no success with debian powerpc-linux-gnu-gcc 8.2.0-2.

After

  CROSS_COMPILE=powerpc-linux-gnu- ./MAKEALL -a ppc

the error message is:

  powerpc-linux-gnu-gcc: error: unrecognized command line option ‘-mno-spe’; did you mean ‘-fno-see’?
  powerpc-linux-gnu-gcc: error: unrecognized command line option ‘-mspe=no’; did you mean ‘-misel=no’?
  make[2]: *** [/home/builduser/barebox/./Kbuild:40: arch/ppc/lib/asm-offsets.s] Error 1
  make[1]: *** [/home/builduser/barebox/Makefile:832: prepare0] Error 2
  make[1]: *** Waiting for unfinished jobs....
  powerpc-linux-gnu-gcc: error: unrecognized command line option ‘-mno-spe’; did you mean ‘-fno-see’?
  powerpc-linux-gnu-gcc: error: unrecognized command line option ‘-mspe=no’; did you mean ‘-misel=no’?
  make[3]: *** [/home/builduser/barebox/scripts/Makefile.build:250: scripts/mod/empty.o] Error 1
  make[3]: *** Waiting for unfinished jobs....


With this linux kernel-based patch ppc build has no fail.

diff --git a/arch/ppc/Makefile b/arch/ppc/Makefile
index 05ec2438a..e575e5923 100644
--- a/arch/ppc/Makefile
+++ b/arch/ppc/Makefile
@@ -1,7 +1,12 @@
 
 CPPFLAGS += -ffixed-r14 -m32   \
        -meabi -D __PPC__ -D CONFIG_PPC \
-       -fno-strict-aliasing -mno-spe -mspe=no
+       -fno-strict-aliasing
+
+# No SPE instruction when building kernel
+# (We use all available options to help semi-broken compilers)
+CPPFLAGS += $(call cc-option,-mno-spe)
+CPPFLAGS += $(call cc-option,-mspe=no)
 
 ifdef CONFIG_RELOCATABLE
 CPPFLAGS += -fPIC -mrelocatable


I have no real powerpc experience to submit this patch.

Could you please comment this patch?

-- 
Best regards,
  Antony Pavlov

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             reply	other threads:[~2019-01-23 12:02 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-23 12:01 Antony Pavlov [this message]
2019-01-24  2:41 ` Andrey Smirnov

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