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# These are the functions which clang needs when it is targetting a previous
# version of the OS. The issue is that the backend may use functions which were
# not present in the libgcc that shipped on the platform. In such cases, we link
# with a version of the library which contains private_extern definitions of all
# the extra functions which might be referenced.
Description := Static runtime libraries for embedded clang/Darwin
XCRun = \
$(shell \
result=`xcrun -find $(1) 2> /dev/null`; \
if [ "$$?" != "0" ]; then result=$(1); fi; \
echo $$result)
###
CC := $(call XCRun,clang)
AR := $(call XCRun,ar)
RANLIB := $(call XCRun,ranlib)
STRIP := $(call XCRun,strip)
LIPO := $(call XCRun,lipo)
DSYMUTIL := $(call XCRun,dsymutil)
Configs :=
UniversalArchs :=
# Soft-float version of the runtime. No floating-point instructions will be used
# and the ABI (out of necessity) passes floating values in normal registers:
# non-VFP variant of the AAPCS.
Configs += soft_static
UniversalArchs.soft_static := armv6m armv7m armv7em armv7
# Hard-float version of the runtime. On ARM VFP instructions and registers are
# allowed, and floating point values get passed in them. VFP variant of the
# AAPCS.
Configs += hard_static
UniversalArchs.hard_static := armv7em armv7 i386 x86_64
Configs += soft_pic
UniversalArchs.soft_pic := armv6m armv7m armv7em armv7
Configs += hard_pic
UniversalArchs.hard_pic := armv7em armv7 i386 x86_64
CFLAGS := -Wall -Werror -Oz -fomit-frame-pointer -ffreestanding
PIC_CFLAGS := -fPIC
STATIC_CFLAGS := -static
CFLAGS_SOFT := -mfloat-abi=soft
CFLAGS_HARD := -mfloat-abi=hard
CFLAGS_ARMV7 := -target thumbv7-apple-darwin-eabi
CFLAGS_I386 := -march=pentium
CFLAGS.soft_static := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_SOFT)
CFLAGS.hard_static := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_HARD)
CFLAGS.soft_pic := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_SOFT)
CFLAGS.hard_pic := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_HARD)
CFLAGS.soft_static.armv7 := $(CFLAGS.soft_static) $(CFLAGS_ARMV7)
CFLAGS.hard_static.armv7 := $(CFLAGS.hard_static) $(CFLAGS_ARMV7)
CFLAGS.soft_pic.armv7 := $(CFLAGS.soft_pic) $(CFLAGS_ARMV7)
CFLAGS.hard_pic.armv7 := $(CFLAGS.hard_pic) $(CFLAGS_ARMV7)
# x86 platforms ignore -mfloat-abi options and complain about doing so. Despite
# this they're hard-float.
CFLAGS.hard_static.i386 := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_I386)
CFLAGS.hard_pic.i386 := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_I386)
CFLAGS.hard_static.x86_64 := $(CFLAGS) $(STATIC_CFLAGS)
CFLAGS.hard_pic.x86_64 := $(CFLAGS) $(PIC_CFLAGS)
# Functions not wanted:
# + eprintf is obsolete anyway
# + *vfp: designed for Thumb1 CPUs with VFPv2
COMMON_FUNCTIONS := \
absvdi2 \
absvsi2 \
addvdi3 \
addvsi3 \
ashldi3 \
ashrdi3 \
bswapdi2 \
bswapsi2 \
clzdi2 \
clzsi2 \
cmpdi2 \
ctzdi2 \
ctzsi2 \
divdc3 \
divdi3 \
divsc3 \
divmodsi4 \
udivmodsi4 \
do_global_dtors \
ffsdi2 \
fixdfdi \
fixsfdi \
fixunsdfdi \
fixunsdfsi \
fixunssfdi \
fixunssfsi \
floatdidf \
floatdisf \
floatundidf \
floatundisf \
gcc_bcmp \
lshrdi3 \
moddi3 \
muldc3 \
muldi3 \
mulsc3 \
mulvdi3 \
mulvsi3 \
negdi2 \
negvdi2 \
negvsi2 \
paritydi2 \
paritysi2 \
popcountdi2 \
popcountsi2 \
powidf2 \
powisf2 \
subvdi3 \
subvsi3 \
ucmpdi2 \
udiv_w_sdiv \
udivdi3 \
udivmoddi4 \
umoddi3 \
adddf3 \
addsf3 \
cmpdf2 \
cmpsf2 \
div0 \
divdf3 \
divsf3 \
divsi3 \
extendsfdf2 \
ffssi2 \
fixdfsi \
fixsfsi \
floatsidf \
floatsisf \
floatunsidf \
floatunsisf \
comparedf2 \
comparesf2 \
modsi3 \
muldf3 \
mulsf3 \
negdf2 \
negsf2 \
subdf3 \
subsf3 \
truncdfsf2 \
udivsi3 \
umodsi3 \
unorddf2 \
unordsf2
ARM_FUNCTIONS := \
aeabi_cdcmpeq \
aeabi_cdrcmple \
aeabi_cfcmpeq \
aeabi_cfrcmple \
aeabi_dcmpeq \
aeabi_dcmpge \
aeabi_dcmpgt \
aeabi_dcmple \
aeabi_dcmplt \
aeabi_drsub \
aeabi_fcmpeq \
aeabi_fcmpge \
aeabi_fcmpgt \
aeabi_fcmple \
aeabi_fcmplt \
aeabi_frsub \
aeabi_idivmod \
aeabi_uidivmod \
# ARM Assembly implementation which requires Thumb2 (i.e. won't work on v6M).
THUMB2_FUNCTIONS := \
switch16 \
switch32 \
switch8 \
switchu8 \
I386_FUNCTIONS := \
i686.get_pc_thunk.eax \
i686.get_pc_thunk.ebp \
i686.get_pc_thunk.ebx \
i686.get_pc_thunk.ecx \
i686.get_pc_thunk.edi \
i686.get_pc_thunk.edx \
i686.get_pc_thunk.esi
# FIXME: Currently, compiler-rt is missing implementations for a number of the
# functions. Filter them out for now.
MISSING_FUNCTIONS := \
cmpdf2 cmpsf2 div0 \
ffssi2 \
udiv_w_sdiv unorddf2 unordsf2 bswapdi2 \
bswapsi2 \
gcc_bcmp \
do_global_dtors \
i686.get_pc_thunk.eax i686.get_pc_thunk.ebp i686.get_pc_thunk.ebx \
i686.get_pc_thunk.ecx i686.get_pc_thunk.edi i686.get_pc_thunk.edx \
i686.get_pc_thunk.esi \
aeabi_cdcmpeq aeabi_cdrcmple aeabi_cfcmpeq aeabi_cfrcmple aeabi_dcmpeq \
aeabi_dcmpge aeabi_dcmpgt aeabi_dcmple aeabi_dcmplt aeabi_drsub \
aeabi_fcmpeq \ aeabi_fcmpge aeabi_fcmpgt aeabi_fcmple aeabi_fcmplt \
aeabi_frsub aeabi_idivmod aeabi_uidivmod
FUNCTIONS_ARMV6M := $(COMMON_FUNCTIONS) $(ARM_FUNCTIONS)
FUNCTIONS_ARM_ALL := $(COMMON_FUNCTIONS) $(ARM_FUNCTIONS) $(THUMB2_FUNCTIONS)
FUNCTIONS_I386 := $(COMMON_FUNCTIONS) $(I386_FUNCTIONS)
FUNCTIONS_X86_64 := $(COMMON_FUNCTIONS)
FUNCTIONS_ARMV6M := \
$(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_ARMV6M))
FUNCTIONS_ARM_ALL := \
$(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_ARM_ALL))
FUNCTIONS_I386 := \
$(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_I386))
FUNCTIONS_X86_64 := \
$(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_X86_64))
FUNCTIONS.soft_static.armv6m := $(FUNCTIONS_ARMV6M)
FUNCTIONS.soft_pic.armv6m := $(FUNCTIONS_ARMV6M)
FUNCTIONS.soft_static.armv7m := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.soft_pic.armv7m := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.soft_static.armv7em := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.hard_static.armv7em := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.soft_pic.armv7em := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.hard_pic.armv7em := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.soft_static.armv7 := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.hard_static.armv7 := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.soft_pic.armv7 := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.hard_pic.armv7 := $(FUNCTIONS_ARM_ALL)
FUNCTIONS.hard_static.i386 := $(FUNCTIONS_I386)
FUNCTIONS.hard_pic.i386 := $(FUNCTIONS_I386)
FUNCTIONS.hard_static.x86_64 := $(FUNCTIONS_X86_64)
FUNCTIONS.hard_pic.x86_64 := $(FUNCTIONS_X86_64)
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