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authorEdward O'Callaghan <eocallaghan@alterapraxis.com>2014-06-28 03:02:52 +1000
committerEdward O'Callaghan <eocallaghan@alterapraxis.com>2014-10-28 00:40:33 +0100
commitdd91c7f6d3538c0c86335dc256339f2330de5e0a (patch)
tree546ed82b9a25d5086038d0c2edf510f67844e121
parent2c9d2cf75c6b12132f1f2c43ef9c01b51f741d26 (diff)
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build: Allow clang build linkage to use libcompiler-rt
Make use of '-print-librt-file-name' over '-print-libgcc-file-name' to use Compiler-RT runtime glue over libgcc glue. NOTE: *** Requires at least clang 3.6.x Change-Id: I7f63284473d6067bf775409970c8dd98f5d5a8d5 Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com> Reviewed-on: http://review.coreboot.org/6144 Reviewed-by: Marc Jones <marc.jones@se-eng.com> Tested-by: build bot (Jenkins)
-rw-r--r--Makefile6
-rw-r--r--src/arch/x86/Makefile.inc6
-rw-r--r--toolchain.inc1
3 files changed, 8 insertions, 5 deletions
diff --git a/Makefile b/Makefile
index 49fbba5e5..42aaabd36 100644
--- a/Makefile
+++ b/Makefile
@@ -117,8 +117,10 @@ else
include $(HAVE_DOTCONFIG)
ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
-# FIXME: arm/aarch64 won't build right now
-CFLAGS_x86_32 = -no-integrated-as -Qunused-arguments -target i386-elf -m32
+# FIXME: armv7/aarch64 won't build right now
+# NOTE: clang puts compiler-rt under lib/linux/libclang_rt.builtins-i386.a
+# this means the triple is i386-linux-elf instead of i386-none-elf
+CFLAGS_x86_32 = -no-integrated-as -Qunused-arguments -target i386-linux-elf -m32
CC_x86_32:=clang
ifneq ($(CONFIG_MMX),y)
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 1480a666b..50f5adaf3 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -209,7 +209,7 @@ romstage-libs ?=
$(objcbfs)/romstage_null.debug: $$(romstage-objs) $(objgenerated)/romstage_null.ld $$(romstage-libs)
@printf " LINK $(subst $(obj)/,,$(@))\n"
ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
- $(LD_romstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) --start-group $(romstage-objs) $(romstage-libs) $(LIBGCC_FILE_NAME_romstage) --end-group -T $(objgenerated)/romstage_null.ld
+ $(LD_romstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) --start-group $(romstage-objs) $(romstage-libs) $(LIBCLANG_RT_FILE_NAME_romstage) --end-group -T $(objgenerated)/romstage_null.ld
else
$(CC_romstage) $(CFLAGS_romstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) -T $(objgenerated)/romstage_null.ld -Wl,--wrap,__divdi3 -Wl,--wrap,__udivdi3 -Wl,--wrap,__moddi3 -Wl,--wrap,__umoddi3 -Wl,--start-group $(romstage-objs) $(romstage-libs) $(LIBGCC_FILE_NAME_romstage) -Wl,--end-group
endif
@@ -221,7 +221,7 @@ endif
$(objcbfs)/romstage_xip.debug: $$(romstage-objs) $(objgenerated)/romstage_xip.ld $$(romstage-libs)
@printf " LINK $(subst $(obj)/,,$(@))\n"
ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
- $(LD_romstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) --start-group $(romstage-objs) $(romstage-libs) $(LIBGCC_FILE_NAME_romstage) --end-group -T $(objgenerated)/romstage_xip.ld
+ $(LD_romstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) --start-group $(romstage-objs) $(romstage-libs) $(LIBCLANG_RT_FILE_NAME_romstage) --end-group -T $(objgenerated)/romstage_xip.ld
else
$(CC_romstage) $(CFLAGS_romstage) -nostdlib -nostartfiles -static -o $@ -L$(obj) -T $(objgenerated)/romstage_xip.ld -Wl,--wrap,__divdi3 -Wl,--wrap,__udivdi3 -Wl,--wrap,__moddi3 -Wl,--wrap,__umoddi3 -Wl,--start-group $(romstage-objs) $(romstage-libs) $(LIBGCC_FILE_NAME_romstage) -Wl,--end-group
endif
@@ -331,7 +331,7 @@ endif
$(objgenerated)/ramstage.o: $$(ramstage-objs) $(LIBGCC_FILE_NAME_ramstage) $$(ramstage-libs)
@printf " CC $(subst $(obj)/,,$(@))\n"
ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y)
- $(LD_ramstage) -m elf_i386 -r -o $@ --start-group $(ramstage-objs) $(ramstage-libs) $(LIBGCC_FILE_NAME_ramstage) --end-group
+ $(LD_ramstage) -m elf_i386 -r -o $@ --start-group $(ramstage-objs) $(ramstage-libs) $(LIBCLANG_RT_FILE_NAME_ramstage) --end-group
else
$(CC_ramstage) $(CFLAGS_ramstage) -nostdlib -r -o $@ -Wl,--wrap,__divdi3 -Wl,--wrap,__udivdi3 -Wl,--wrap,__moddi3 -Wl,--wrap,__umoddi3 -Wl,--start-group $(ramstage-objs) $(ramstage-libs) $(LIBGCC_FILE_NAME_ramstage) -Wl,--end-group
endif
diff --git a/toolchain.inc b/toolchain.inc
index 2a68576a8..a572f98d4 100644
--- a/toolchain.inc
+++ b/toolchain.inc
@@ -93,6 +93,7 @@ READELF_$(1) := $(READELF_$(2))
CFLAGS_$(1) += $$(CFLAGS_common) $$(CFLAGS_$(2))
CPPFLAGS_$(1) += $$(CPPFLAGS_common) $$(CPPFLAGS_$(2))
LIBGCC_FILE_NAME_$(1) = $(wildcard $(shell $(CC_$(2)) $(CFLAGS_$(2)) -print-libgcc-file-name))
+LIBCLANG_RT_FILE_NAME_$(1) = $(shell $(CC_$(2)) $(CFLAGS_$(2)) -print-librt-file-name)
endef
# define_class: Allows defining any program as dynamic class and compiler tool