commit 62e92077a8936e60087d55683538ee386cc673aa
author Albert ARIBAUD <albert.u.boot@aribaud.net> Fri Oct 23 18:06:40 2015 +0200
committer Albert ARIBAUD <albert.u.boot@aribaud.net> Tue Nov 10 15:03:48 2015 +0100
tree 98bf9f9796ab466ad1bff97c7672d5c3159526d3
parent bf104ffa2594e5bf14ef2d5ac2711084c763ef77

arm: support Thumb-1 with CONFIG_SYS_THUMB_BUILD

When building a Thumb-1-only target with CONFIG_SYS_THUMB_BUILD,
some files fail to build, most of the time because they include
mcr instructions, which only exist for Thumb-2.

This patch introduces a Kconfig option CONFIG_THUMB2 and uses
it to select between Thumb-2 and ARM mode for the aforementioned
files.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>

Makefile

diff --git a/Makefile b/Makefile
index 3c21f8d..0bd8be2 100644
--- a/Makefile
+++ b/Makefile
@@ -605,6 +605,8 @@
 UBOOTINCLUDE    := \
 		-Iinclude \
 		$(if $(KBUILD_SRC), -I$(srctree)/include) \
+		$(if $(CONFIG_SYS_THUMB_BUILD), $(if $(CONFIG_HAS_THUMB2),, \
+			-I$(srctree)/arch/$(ARCH)/thumb1/include),) \
 		-I$(srctree)/arch/$(ARCH)/include \
 		-include $(srctree)/include/linux/kconfig.h