linux-kernel - [PATCH] samples/seccomp: fix 31 bit build on s390

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Message-ID: <20120908083142.GA4959@osiris.de.ibm.com>
Date:	Sat, 8 Sep 2012 10:31:42 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	James Morris <james.l.morris@...cle.com>
Cc:	Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org
Subject: [PATCH] samples/seccomp: fix 31 bit build on s390

>From cea999ef4e68e23c70e64baf054768bdebe15e1b Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@...ibm.com>
Date: Sat, 8 Sep 2012 10:23:42 +0200
Subject: [PATCH] samples/seccomp: fix 31 bit build on s390

On s390 the flag to force 31 builds is -m31 instead of -m32 unlike
on all (?) other architectures.

Fixes this compile error:

  HOSTCC  samples/seccomp/bpf-direct.o
cc1: error: unrecognized command line option "-m32"
make[2]: *** [samples/seccomp/bpf-direct.o] Error 1

Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
---

Patch is on top of linux-next of today.

 samples/seccomp/Makefile | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/samples/seccomp/Makefile b/samples/seccomp/Makefile
index 16aa2d4..bbbd276 100644
--- a/samples/seccomp/Makefile
+++ b/samples/seccomp/Makefile
@@ -18,14 +18,22 @@ HOSTCFLAGS_bpf-direct.o += -idirafter $(objtree)/include
 bpf-direct-objs := bpf-direct.o
 
 # Try to match the kernel target.
-ifeq ($(CONFIG_64BIT),)
-HOSTCFLAGS_bpf-direct.o += -m32
-HOSTCFLAGS_dropper.o += -m32
-HOSTCFLAGS_bpf-helper.o += -m32
-HOSTCFLAGS_bpf-fancy.o += -m32
-HOSTLOADLIBES_bpf-direct += -m32
-HOSTLOADLIBES_bpf-fancy += -m32
-HOSTLOADLIBES_dropper += -m32
+ifndef CONFIG_64BIT
+
+# s390 has -m31 flag to build 31 bit binaries
+ifndef CONFIG_S390
+MFLAG = -m32
+else
+MFLAG = -m31
+endif
+
+HOSTCFLAGS_bpf-direct.o += $(MFLAG)
+HOSTCFLAGS_dropper.o += $(MFLAG)
+HOSTCFLAGS_bpf-helper.o += $(MFLAG)
+HOSTCFLAGS_bpf-fancy.o += $(MFLAG)
+HOSTLOADLIBES_bpf-direct += $(MFLAG)
+HOSTLOADLIBES_bpf-fancy += $(MFLAG)
+HOSTLOADLIBES_dropper += $(MFLAG)
 endif
 
 # Tell kbuild to always build the programs
-- 
1.7.11.5

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