From 6d8962e814c15807dd6ac5757904be2a02d187b8 Mon Sep 17 00:00:00 2001 From: Sebastien Carlier Date: Fri, 5 Nov 2010 15:48:07 +0100 Subject: Switch from archive libraries to partial linking Before this commit, weak symbols were not overridden by non-weak symbols found in archive libraries when linking with recent versions of binutils. As stated in the System V ABI, "the link editor does not extract archive members to resolve undefined weak symbols". This commit changes all Makefiles to use partial linking (ld -r) instead of creating library archives, which forces all symbols to participate in linking, allowing non-weak symbols to override weak symbols as intended. This approach is also used by Linux, from which the gmake function cmd_link_o_target (defined in config.mk and used in all Makefiles) is inspired. The name of each former library archive is preserved except for extensions which change from ".a" to ".o". This commit updates references accordingly where needed, in particular in some linker scripts. This commit reveals board configurations that exclude some features but include source files that depend these disabled features in the build, resulting in undefined symbols. Known such cases include: - disabling CMD_NET but not CMD_NFS; - enabling CONFIG_OF_LIBFDT but not CONFIG_QE. Signed-off-by: Sebastien Carlier --- post/Makefile | 20 +++++++++----------- post/board/lwmon/Makefile | 2 +- post/board/lwmon5/Makefile | 2 +- post/board/netta/Makefile | 2 +- post/board/pdm360ng/Makefile | 2 +- post/cpu/mpc83xx/Makefile | 2 +- post/cpu/mpc8xx/Makefile | 2 +- post/cpu/ppc4xx/Makefile | 2 +- post/drivers/Makefile | 2 +- post/lib_powerpc/Makefile | 2 +- post/lib_powerpc/fpu/Makefile | 2 +- post/rules.mk | 2 +- 12 files changed, 20 insertions(+), 22 deletions(-) (limited to 'post') diff --git a/post/Makefile b/post/Makefile index 169d12632..200e2f1b9 100644 --- a/post/Makefile +++ b/post/Makefile @@ -24,20 +24,20 @@ include $(TOPDIR)/config.mk include $(OBJTREE)/include/autoconf.mk -LIB = libpost.a -GPLIB-$(CONFIG_HAS_POST) += libgenpost.a +LIB = libpost.o +GPLIB-$(CONFIG_HAS_POST) += libgenpost.o COBJS-$(CONFIG_HAS_POST) += post.o COBJS-$(CONFIG_POST_STD_LIST) += tests.o -SPLIB-$(CONFIG_HAS_POST) = drivers/libpostdrivers.a +SPLIB-$(CONFIG_HAS_POST) = drivers/libpostdrivers.o SPLIB-$(CONFIG_HAS_POST) += $(shell if [ -d lib_$(ARCH) ]; then echo \ - "lib_$(ARCH)/libpost$(ARCH).a"; fi) + "lib_$(ARCH)/libpost$(ARCH).o"; fi) SPLIB-$(CONFIG_HAS_POST) += $(shell if [ -d lib_$(ARCH)/fpu ]; then echo \ - "lib_$(ARCH)/fpu/libpost$(ARCH)fpu.a"; fi) + "lib_$(ARCH)/fpu/libpost$(ARCH)fpu.o"; fi) SPLIB-$(CONFIG_HAS_POST) += $(shell if [ -d cpu/$(CPU) ]; then echo \ - "cpu/$(CPU)/libpost$(CPU).a"; fi) + "cpu/$(CPU)/libpost$(CPU).o"; fi) SPLIB-$(CONFIG_HAS_POST) += $(shell if [ -d board/$(BOARD) ]; then echo \ - "board/$(BOARD)/libpost$(BOARD).a"; fi) + "board/$(BOARD)/libpost$(BOARD).o"; fi) GPLIB := $(addprefix $(obj),$(GPLIB-y)) SPLIB := $(addprefix $(obj),$(SPLIB-y)) @@ -55,7 +55,7 @@ postdeps: # generic POST library $(GPLIB): $(obj).depend $(OBJS) - $(AR) $(ARFLAGS) $@ $(OBJS) + $(call cmd_link_o_target, $(OBJS)) # specific POST libraries $(SPLIB): $(obj).depend postdeps @@ -63,9 +63,7 @@ $(SPLIB): $(obj).depend postdeps # the POST lib archive $(LIB): $(GPLIB) $(SPLIB) - (echo create $(LIB); for lib in $(GPLIB) $(SPLIB) ; \ - do echo addlib $$lib; done; echo save) \ - | $(AR) -M + $(call cmd_link_o_target, $^) ######################################################################### diff --git a/post/board/lwmon/Makefile b/post/board/lwmon/Makefile index d2932bed1..83026c071 100644 --- a/post/board/lwmon/Makefile +++ b/post/board/lwmon/Makefile @@ -22,7 +22,7 @@ # include $(OBJTREE)/include/autoconf.mk -LIB = libpostlwmon.a +LIB = libpostlwmon.o COBJS-$(CONFIG_HAS_POST) += sysmon.o diff --git a/post/board/lwmon5/Makefile b/post/board/lwmon5/Makefile index 4e95515ef..b1996887c 100644 --- a/post/board/lwmon5/Makefile +++ b/post/board/lwmon5/Makefile @@ -22,7 +22,7 @@ # MA 02111-1307 USA include $(OBJTREE)/include/autoconf.mk -LIB = libpostlwmon5.a +LIB = libpostlwmon5.o COBJS-$(CONFIG_HAS_POST) += sysmon.o watchdog.o dspic.o fpga.o dsp.o gdc.o diff --git a/post/board/netta/Makefile b/post/board/netta/Makefile index 8a8578f43..2d34dd8d0 100644 --- a/post/board/netta/Makefile +++ b/post/board/netta/Makefile @@ -22,7 +22,7 @@ # include $(OBJTREE)/include/autoconf.mk -LIB = libpostnetta.a +LIB = libpostnetta.o COBJS-$(CONFIG_HAS_POST) += codec.o dsp.o diff --git a/post/board/pdm360ng/Makefile b/post/board/pdm360ng/Makefile index d1538f672..d25b0d151 100644 --- a/post/board/pdm360ng/Makefile +++ b/post/board/pdm360ng/Makefile @@ -22,7 +22,7 @@ # include $(OBJTREE)/include/autoconf.mk -LIB = libpostpdm360ng.a +LIB = libpostpdm360ng.o COBJS-$(CONFIG_HAS_POST) += coproc_com.o diff --git a/post/cpu/mpc83xx/Makefile b/post/cpu/mpc83xx/Makefile index 86d8784ca..a8b70059f 100644 --- a/post/cpu/mpc83xx/Makefile +++ b/post/cpu/mpc83xx/Makefile @@ -22,7 +22,7 @@ # include $(OBJTREE)/include/autoconf.mk -LIB = libpostmpc83xx.a +LIB = libpostmpc83xx.o AOBJS-$(CONFIG_HAS_POST) += COBJS-$(CONFIG_HAS_POST) += ecc.o diff --git a/post/cpu/mpc8xx/Makefile b/post/cpu/mpc8xx/Makefile index 162924f6b..3e1792f89 100644 --- a/post/cpu/mpc8xx/Makefile +++ b/post/cpu/mpc8xx/Makefile @@ -22,7 +22,7 @@ # include $(OBJTREE)/include/autoconf.mk -LIB = libpostmpc8xx.a +LIB = libpostmpc8xx.o AOBJS-$(CONFIG_HAS_POST) += cache_8xx.o COBJS-$(CONFIG_HAS_POST) += cache.o ether.o spr.o uart.o usb.o watchdog.o diff --git a/post/cpu/ppc4xx/Makefile b/post/cpu/ppc4xx/Makefile index 1cfd3bb59..922013131 100644 --- a/post/cpu/ppc4xx/Makefile +++ b/post/cpu/ppc4xx/Makefile @@ -22,7 +22,7 @@ # include $(OBJTREE)/include/autoconf.mk -LIB = libpostppc4xx.a +LIB = libpostppc4xx.o AOBJS-$(CONFIG_HAS_POST) += cache_4xx.o COBJS-$(CONFIG_HAS_POST) += cache.o diff --git a/post/drivers/Makefile b/post/drivers/Makefile index 0b6cdf58c..0d87ae0f9 100644 --- a/post/drivers/Makefile +++ b/post/drivers/Makefile @@ -22,7 +22,7 @@ # include $(TOPDIR)/config.mk -LIB = libpostdrivers.a +LIB = libpostdrivers.o COBJS-$(CONFIG_HAS_POST) += i2c.o memory.o rtc.o diff --git a/post/lib_powerpc/Makefile b/post/lib_powerpc/Makefile index 0cd15cfa1..bc9b82ef2 100644 --- a/post/lib_powerpc/Makefile +++ b/post/lib_powerpc/Makefile @@ -22,7 +22,7 @@ # include $(TOPDIR)/config.mk -LIB = libpost$(ARCH).a +LIB = libpost$(ARCH).o AOBJS-$(CONFIG_HAS_POST) += asm.o COBJS-$(CONFIG_HAS_POST) += cpu.o cmp.o cmpi.o two.o twox.o three.o threex.o diff --git a/post/lib_powerpc/fpu/Makefile b/post/lib_powerpc/fpu/Makefile index 25726db73..b97ad6fbc 100644 --- a/post/lib_powerpc/fpu/Makefile +++ b/post/lib_powerpc/fpu/Makefile @@ -22,7 +22,7 @@ # include $(TOPDIR)/config.mk -LIB = libpost$(ARCH)fpu.a +LIB = libpost$(ARCH)fpu.o COBJS-$(CONFIG_HAS_POST) += fpu.o 20001122-1.o 20010114-2.o 20010226-1.o 980619-1.o COBJS-$(CONFIG_HAS_POST) += acc1.o compare-fp-1.o mul-subnormal-single-1.o diff --git a/post/rules.mk b/post/rules.mk index 1efc9c7d9..17f8ef762 100644 --- a/post/rules.mk +++ b/post/rules.mk @@ -34,7 +34,7 @@ CPPFLAGS += -I$(TOPDIR) all: $(LIB) $(LIB): $(obj).depend $(OBJS) - $(AR) $(ARFLAGS) $@ $(OBJS) + $(call cmd_link_o_target, $(OBJS)) ######################################################################### -- cgit v1.2.3