Makefile: Add a 'checkthumb' rule

This rule confirms that if we're on ARM and we have enabled THUMB builds
that we have a new enough toolchain to produce a working binary.

Changes in v2:
- Switch to ALL-$(CONFIG_SYS_THUMB_BUILD) in arch/arm/config.mk (Mike F)
- Simplfy checkthumb test after doing the above

Signed-off-by: Tom Rini <trini@ti.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/Makefile b/Makefile
index 023ea23a38bdb3d187eaf2950999b989820bfa92..351a8f04d22dfa25a364dfa66c262882526a63da 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -556,6 +556,13 @@ SYSTEM_MAP = \
 $(obj)System.map:      $(obj)u-boot
                @$(call SYSTEM_MAP,$<) > $(obj)System.map
 
+checkthumb:
+       @if test $(call cc-version) -lt 0404; then \
+               echo -n '*** Your GCC does not produce working '; \
+               echo 'binaries in THUMB mode.'; \
+               echo '*** Your board is configured for THUMB mode.'; \
+               false; \
+       fi
 #
 # Auto-generate the autoconf.mk file (which is included by all makefiles)
 #

diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index 4cc99e7613747650227f0b54b952b6405b5906ca..3f4453a23406ff277ce57ed1803971e60b71af9f 100644 (file)
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -44,6 +44,11 @@ PF_CPPFLAGS_ARM := $(call cc-option,-marm,) \
                $(call cc-option,-mno-thumb-interwork,)
 endif
 
+# Only test once
+ifneq ($(CONFIG_SPL_BUILD),y)
+ALL-$(CONFIG_SYS_THUMB_BUILD)  += checkthumb
+endif
+
 # Try if EABI is supported, else fall back to old API,
 # i. e. for example:
 # - with ELDK 4.2 (EABI supported), use: