From 1bb8b2ef2722bbaea3cc5d46321ce1d99f9b56f7 Mon Sep 17 00:00:00 2001
From: Sergei Poselenov <sposelenov@emcraft.com>
Date: Thu, 14 Aug 2008 14:08:28 +0200
Subject: [PATCH] ARM: fix warning: target CPU does not support interworking

This patch fixes warnings like this:

start.S:0: warning: target CPU does not support interworking

which come from some ARM cross compilers and are caused by hard-coded
(with "--with-cpu=arm9" configuration option) ARM targets (which
support ARM Thumb instructions), while the ARM target selected from
the command line (with "-march=armv4") doesn't support Thumb
instructions.

This warning is issued by the compiler regardless of the real use of
the Thumb instructions in code.

To fix this problem, we use options according to compiler version
being used.

Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
---
 cpu/arm946es/config.mk  | 7 +++++++
 cpu/arm_intcm/config.mk | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/cpu/arm946es/config.mk b/cpu/arm946es/config.mk
index 81ca2885e2..f774c7e827 100644
--- a/cpu/arm946es/config.mk
+++ b/cpu/arm946es/config.mk
@@ -25,3 +25,10 @@ PLATFORM_RELFLAGS += -fno-strict-aliasing  -fno-common -ffixed-r8 \
 	 -msoft-float
 
 PLATFORM_CPPFLAGS +=  -march=armv4
+# =========================================================================
+#
+# Supply options according to compiler version
+#
+# =========================================================================
+PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu)
+PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
diff --git a/cpu/arm_intcm/config.mk b/cpu/arm_intcm/config.mk
index 81ca2885e2..f774c7e827 100644
--- a/cpu/arm_intcm/config.mk
+++ b/cpu/arm_intcm/config.mk
@@ -25,3 +25,10 @@ PLATFORM_RELFLAGS += -fno-strict-aliasing  -fno-common -ffixed-r8 \
 	 -msoft-float
 
 PLATFORM_CPPFLAGS +=  -march=armv4
+# =========================================================================
+#
+# Supply options according to compiler version
+#
+# =========================================================================
+PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu)
+PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))
-- 
2.39.5