[U-Boot] [RFC PATCH v2 20/20] sandbox: Makefile changes to build sandbox architecture

[Simon Glass]

At this point U-Boot will build and run on x86 under Linux.

The idea is to define a new architecture called 'sandbox', alongside ARM
and x86. This runs natively on Linux to suit the host machine. All
hardware access is either omitted or emulated.

The purpose of this system is to test the bulk of the non-hardware-specific
U-Boot code. We can mock the SPI flash, GPIOs, UART and keyboard, then test
that U-Boot behaves as we wish.

Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v2:
- Rebase to master
- Tidy top-level Makefile to minimise changes

 Makefile |   14 +++++++++++---
 1 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 672b5cd..47f6103 100644
--- a/Makefile
+++ b/Makefile
@@ -199,8 +199,9 @@ endif
 
 #########################################################################
 # U-Boot objects....order is important (i.e. start must be first)
-
+ifneq ($(CPU),sandbox)
 OBJS  = $(CPUDIR)/start.o
+endif
 ifeq ($(CPU),x86)
 OBJS += $(CPUDIR)/start16.o
 OBJS += $(CPUDIR)/resetvec.o
@@ -401,12 +402,19 @@ $(obj)u-boot.ubl:       $(obj)u-boot-nand.bin
 		$(obj)tools/mkimage -n $(UBL_CONFIG) -T ublimage \
 		-e $(CONFIG_SYS_TEXT_BASE) -d $< $@
 
+ifeq ($(CONFIG_SANDBOX),y)
+GEN_UBOOT = \
+		cd $(LNDIR) && $(CC) $(SYMS) -T $(obj)u-boot.lds \
+			-Wl,--start-group $(__LIBS) -Wl,--end-group \
+			$(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map -o u-boot
+else
 GEN_UBOOT = \
-		UNDEF_SYM=`$(OBJDUMP) -x $(LIBBOARD) $(LIBS) | \
-		sed  -n -e 's/.*\($(SYM_PREFIX)__u_boot_cmd_.*\)/-u\1/p'|sort|uniq`;\
+		UNDEF_SYM=`$(UNDEF)`; \
 		cd $(LNDIR) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $$UNDEF_SYM $(__OBJS) \
 			--start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \
 			-Map u-boot.map -o u-boot
+endif
+
 $(obj)u-boot:	depend \
 		$(SUBDIRS) $(OBJS) $(LIBBOARD) $(LIBS) $(LDSCRIPT) $(obj)u-boot.lds
 		$(GEN_UBOOT)
-- 
1.7.3.1