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authorWolfgang Denk <wd@denx.de>2009-07-23 13:15:59 +0200
committerWolfgang Denk <wd@denx.de>2009-07-27 00:11:32 +0200
commit52b1bf2c5cd2f8af880dab503d0039b35570665b (patch)
treee9e4be6a20d20700057812ddac99f1c8c09974d7 /Makefile
parent479105065d965121f57b55dcfe83a940cba46ac1 (diff)
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Make linking against libgcc configurable
Many (especially ARM) tool chains seem to come with broken or otherwise unusable (for the purposes of builing U-Boot) run-time support libraries `libgcc.a'. By using the "USE_PRIVATE_LIBGCC" setting we allow to use alternative libraries instead. "USE_PRIVATE_LIBGCC" can either be set as an environment variable in the shell, or as a command line argument when running "make", i. e. $ make USE_PRIVATE_LIBGCC=yes or $ USE_PRIVATE_LIBGCC=yes $ export USE_PRIVATE_LIBGCC $ make The value of "USE_PRIVATE_LIBGCC" is the name of the directory which contains the alternative run-time support library `libgcc.a'. The special value "yes" selects the directory $(OBJTREE)/lib_$(ARCH) . Note that not all architectures provide an alternative `libgcc.a' in their lib_$(ARCH) directories - so far, only ARM does. Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Prafulla Wadaskar <prafulla@marvell.com> cc: Stefan Roese <sr@denx.de>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile12
1 files changed, 11 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 17605d4..22bfeeb 100644
--- a/Makefile
+++ b/Makefile
@@ -254,7 +254,17 @@ LIBBOARD = board/$(BOARDDIR)/lib$(BOARD).a
LIBBOARD := $(addprefix $(obj),$(LIBBOARD))
# Add GCC lib
-PLATFORM_LIBS += -L $(shell dirname `$(CC) $(CFLAGS) -print-libgcc-file-name`) -lgcc
+ifdef USE_PRIVATE_LIBGCC
+ifeq ("$(USE_PRIVATE_LIBGCC)", "yes")
+PLATFORM_LIBGCC = -L $(OBJTREE)/lib_$(ARCH) -lgcc
+else
+PLATFORM_LIBGCC = -L $(USE_PRIVATE_LIBGCC) -lgcc
+endif
+else
+PLATFORM_LIBGCC = -L $(shell dirname `$(CC) $(CFLAGS) -print-libgcc-file-name`) -lgcc
+endif
+PLATFORM_LIBS += $(PLATFORM_LIBGCC)
+export PLATFORM_LIBS
ifeq ($(CONFIG_NAND_U_BOOT),y)
NAND_SPL = nand_spl