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Makefile: Introduce ARCH_PLATFORM_LIBGCC variable 

In some cases, such as arm multi-lib hardfloat (hf) toolchains, we will
have multiple libgcc.a's available, and the arch needs to provide
additional logic to determine the right file to use
(-print-libgcc-file-name contains no CFLAG parsing logic).

Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2013-10-11 16:13:03 -04:00
parent 183acb7003
commit 070127ecc9
2 changed files with 15 additions and 0 deletions
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4
Makefile
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@ -358,8 +358,12 @@ else
PLATFORM_LIBGCC = -L $(USE_PRIVATE_LIBGCC) -lgcc
endif
else
ifneq ("$(ARCH_PLATFORM_LIBGCC)","")
PLATFORM_LIBGCC := -L $(shell dirname $(ARCH_PLATFORM_LIBGCC)) -lgcc
else
PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(CFLAGS) -print-libgcc-file-name`) -lgcc
endif
endif
PLATFORM_LIBS += $(PLATFORM_LIBGCC)
export PLATFORM_LIBS

11
arch/arm/config.mk
View File

@ -19,6 +19,17 @@ LDFLAGS_FINAL += --gc-sections
PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \
-fno-common -ffixed-r9 -msoft-float
#
# When we use a hardfp toolchain if there are both 'libgcc.a' (hardfp) and
# 'arm-linux-gnueabi/libgcc.a' (softfp) we need to use the latter. We
# cannot always build with a hardfp-only toolchain.
#
ARCH_PLATFORM_LIBGCC := $(shell \
X=`$(CC) -print-file-name=arm-linux-gnueabi/libgcc.a`; \
if [ -f $$X ]; then echo $$X ; \
else $(CC) -print-file-name=libgcc.a ; \
fi)
# Support generic board on ARM
__HAVE_ARCH_GENERIC_BOARD := y