[U-Boot] [PATCH v4 19/19] 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

Changes in v4:
- Drop board/sandbox/common/board.c for now (no board_init() needed)
- Move main() into start.c to remove one ifdef from the top level Makefile
- Fix up Makefile for non-sandbox builds

 Makefile |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/Makefile b/Makefile
index 1bfeebe..a977ddb 100644
--- a/Makefile
+++ b/Makefile
@@ -401,12 +401,20 @@ $(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`;\
 		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