clang_darwin.mk revision 8ef083003fe24fe2b3e8e35c03f4039c45bc46aa 
1# These are the functions which clang needs when it is targetting a previous
2# version of the OS. The issue is that the backend may use functions which were
3# not present in the libgcc that shipped on the platform. In such cases, we link
4# with a version of the library which contains private_extern definitions of all
5# the extra functions which might be referenced.
6
7Description := Static runtime libraries for clang/Darwin.
8
9# A function that ensures we don't try to build for architectures that we
10# don't have working toolchains for.
11CheckArches = \
12  $(shell \
13    result=""; \
14    for arch in $(1); do \
15      if $(CC) -arch $$arch -c -x c /dev/null \
16	  -o /dev/null > /dev/null 2> /dev/null; then \
17        result="$$result$$arch "; \
18      fi; \
19    done; \
20    echo $$result)
21
22###
23
24Configs :=
25UniversalArchs :=
26
27# Configuration solely for providing access to an eprintf symbol, which may
28# still be referenced from Darwin system headers. This symbol is only ever
29# needed on i386.
30Configs += eprintf
31UniversalArchs.eprintf := $(call CheckArches,i386)
32
33# Configuration for targetting 10.4. We need a few functions missing from
34# libgcc_s.10.4.dylib. We only build x86 slices since clang doesn't really
35# support targetting PowerPC.
36Configs += 10.4
37UniversalArchs.10.4 := $(call CheckArches,i386 x86_64)
38
39# Configuration for targetting iOS, for some ARMv6 functions, which must be
40# in the same linkage unit, and for a couple of other functions that didn't
41# make it into libSystem.
42Configs += ios
43UniversalArchs.ios := $(call CheckArches,i386 x86_64 armv6 armv7)
44
45# Configuration for targetting OSX. These functions may not be in libSystem
46# so we should provide our own.
47Configs += osx
48UniversalArchs.osx := $(call CheckArches,i386 x86_64)
49
50# Configuration for use with kernel/kexts.
51Configs += cc_kext
52UniversalArchs.cc_kext := $(call CheckArches,armv6 armv7 i386 x86_64)
53
54# If RC_SUPPORTED_ARCHS is defined, treat it as a list of the architectures we
55# are intended to support and limit what we try to build to that.
56#
57# We make sure to remove empty configs if we end up dropping all the requested
58# archs for a particular config.
59ifneq ($(RC_SUPPORTED_ARCHS),)
60$(foreach config,$(Configs),\
61  $(call Set,UniversalArchs.$(config),\
62	$(filter $(RC_SUPPORTED_ARCHS),$(UniversalArchs.$(config))))\
63  $(if $(UniversalArchs.$(config)),,\
64	$(call Set,Configs,$(filter-out $(config),$(Configs)))))
65endif
66
67###
68
69CC := gcc
70
71# Forcibly strip off any -arch, as that totally breaks our universal support.
72override CC := $(subst -arch ,-arch_,$(CC))
73override CC := $(patsubst -arch_%,,$(CC))
74
75CFLAGS := -Wall -Werror -O3 -fomit-frame-pointer
76
77# Always set deployment target arguments for every build, these libraries should
78# never depend on the environmental overrides. We simply set them to minimum
79# supported deployment target -- nothing in the compiler-rt libraries should
80# actually depend on the deployment target.
81X86_DEPLOYMENT_ARGS := -mmacosx-version-min=10.4
82ARM_DEPLOYMENT_ARGS := -miphoneos-version-min=1.0
83
84# If an explicit ARM_SDK build variable is set, use that as the isysroot.
85ifneq ($(ARM_SDK),)
86ARM_DEPLOYMENT_ARGS += -isysroot $(ARM_SDK)
87endif
88
89CFLAGS.eprintf		:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
90CFLAGS.10.4		:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
91CFLAGS.ios.i386		:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
92CFLAGS.ios.x86_64	:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
93CFLAGS.ios.armv6	:= $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
94CFLAGS.ios.armv7	:= $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
95CFLAGS.osx.i386         := $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
96CFLAGS.osx.x86_64       := $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
97CFLAGS.osx.armv6        := $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
98CFLAGS.osx.armv7        := $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
99CFLAGS.cc_kext.i386	:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
100CFLAGS.cc_kext.x86_64	:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
101CFLAGS.cc_kext.armv6	:= $(CFLAGS) $(ARM_DEPLOYMENT_ARGS) -mthumb
102CFLAGS.cc_kext.armv7	:= $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
103
104FUNCTIONS.eprintf := eprintf
105FUNCTIONS.10.4 := eprintf floatundidf floatundisf floatundixf
106
107FUNCTIONS.ios	    := divmodsi4 udivmodsi4 mulosi4 mulodi4 muloti4
108# On x86, the divmod functions reference divsi.
109FUNCTIONS.ios.i386   := $(FUNCTIONS.ios) \
110                        divsi3 udivsi3
111FUNCTIONS.ios.x86_64 := $(FUNCTIONS.ios) \
112                        divsi3 udivsi3
113FUNCTIONS.ios.armv6 := $(FUNCTIONS.ios) \
114                       sync_synchronize \
115                       switch16 switch32 switch8 switchu8 \
116                       save_vfp_d8_d15_regs restore_vfp_d8_d15_regs
117
118FUNCTIONS.osx	:= mulosi4 mulodi4 muloti4
119
120CCKEXT_COMMON_FUNCTIONS := \
121	absvdi2 \
122	absvsi2 \
123	addvdi3 \
124	addvsi3 \
125	ashldi3 \
126	ashrdi3 \
127	bswapdi2 \
128	bswapsi2 \
129	clzdi2 \
130	clzsi2 \
131	cmpdi2 \
132	ctzdi2 \
133	ctzsi2 \
134	divdc3 \
135	divdi3 \
136	divsc3 \
137	divmodsi4 \
138	udivmodsi4 \
139	do_global_dtors \
140	eprintf \
141	ffsdi2 \
142	fixdfdi \
143	fixsfdi \
144	fixunsdfdi \
145	fixunsdfsi \
146	fixunssfdi \
147	fixunssfsi \
148	floatdidf \
149	floatdisf \
150	floatundidf \
151	floatundisf \
152	gcc_bcmp \
153	lshrdi3 \
154	moddi3 \
155	muldc3 \
156	muldi3 \
157	mulsc3 \
158	mulvdi3 \
159	mulvsi3 \
160	negdi2 \
161	negvdi2 \
162	negvsi2 \
163	paritydi2 \
164	paritysi2 \
165	popcountdi2 \
166	popcountsi2 \
167	powidf2 \
168	powisf2 \
169	subvdi3 \
170	subvsi3 \
171	ucmpdi2 \
172	udiv_w_sdiv \
173	udivdi3 \
174	udivmoddi4 \
175	umoddi3
176
177CCKEXT_ARM_FUNCTIONS := $(CCKEXT_COMMON_FUNCTIONS) \
178	adddf3 \
179	addsf3 \
180	aeabi_cdcmpeq \
181	aeabi_cdrcmple \
182	aeabi_cfcmpeq \
183	aeabi_cfrcmple \
184	aeabi_dcmpeq \
185	aeabi_dcmpge \
186	aeabi_dcmpgt \
187	aeabi_dcmple \
188	aeabi_dcmplt \
189	aeabi_drsub \
190	aeabi_fcmpeq \
191	aeabi_fcmpge \
192	aeabi_fcmpgt \
193	aeabi_fcmple \
194	aeabi_fcmplt \
195	aeabi_frsub \
196	aeabi_idivmod \
197	aeabi_uidivmod \
198	cmpdf2 \
199	cmpsf2 \
200	div0 \
201	divdf3 \
202	divsf3 \
203	divsi3 \
204	extendsfdf2 \
205	ffssi2 \
206	fixdfsi \
207	fixsfsi \
208	floatsidf \
209	floatsisf \
210	floatunsidf \
211	floatunsisf \
212	comparedf2 \
213	comparesf2 \
214	modsi3 \
215	muldf3 \
216	mulsf3 \
217	negdf2 \
218	negsf2 \
219	subdf3 \
220	subsf3 \
221	switch16 \
222	switch32 \
223	switch8 \
224	switchu8 \
225	truncdfsf2 \
226	udivsi3 \
227	umodsi3 \
228	unorddf2 \
229	unordsf2
230
231CCKEXT_ARMVFP_FUNCTIONS := $(CCKEXT_ARM_FUNCTIONS) \
232	adddf3vfp \
233	addsf3vfp \
234	divdf3vfp \
235	divsf3vfp \
236	eqdf2vfp \
237	eqsf2vfp \
238	extendsfdf2vfp \
239	fixdfsivfp \
240	fixsfsivfp \
241	fixunsdfsivfp \
242	fixunssfsivfp \
243	floatsidfvfp \
244	floatsisfvfp \
245	floatunssidfvfp \
246	floatunssisfvfp \
247	gedf2vfp \
248	gesf2vfp \
249	gtdf2vfp \
250	gtsf2vfp \
251	ledf2vfp \
252	lesf2vfp \
253	ltdf2vfp \
254	ltsf2vfp \
255	muldf3vfp \
256	mulsf3vfp \
257	nedf2vfp \
258	nesf2vfp \
259	subdf3vfp \
260	subsf3vfp \
261	truncdfsf2vfp \
262	unorddf2vfp \
263	unordsf2vfp
264
265FUNCTIONS.cc_kext.armv6 := $(CCKEXT_ARMVFP_FUNCTIONS)
266FUNCTIONS.cc_kext.armv7 := $(CCKEXT_ARMVFP_FUNCTIONS)
267
268CCKEXT_X86_FUNCTIONS := $(CCKEXT_COMMON_FUNCTIONS) \
269	divxc3 \
270	fixunsxfdi \
271	fixunsxfsi \
272	fixxfdi \
273	floatdixf \
274	floatundixf \
275	mulxc3 \
276	powixf2
277
278FUNCTIONS.cc_kext.i386 := $(CCKEXT_X86_FUNCTIONS) \
279	ffssi2 \
280	i686.get_pc_thunk.eax \
281	i686.get_pc_thunk.ebp \
282	i686.get_pc_thunk.ebx \
283	i686.get_pc_thunk.ecx \
284	i686.get_pc_thunk.edi \
285	i686.get_pc_thunk.edx \
286	i686.get_pc_thunk.esi
287
288FUNCTIONS.cc_kext.x86_64 := $(CCKEXT_X86_FUNCTIONS) \
289	absvti2 \
290	addvti3 \
291	ashlti3 \
292	ashrti3 \
293	clzti2 \
294	cmpti2 \
295	ctzti2 \
296	divti3 \
297	ffsti2 \
298	fixdfti \
299	fixsfti \
300	fixunsdfti \
301	fixunssfti \
302	fixunsxfti \
303	fixxfti \
304	floattidf \
305	floattisf \
306	floattixf \
307	floatuntidf \
308	floatuntisf \
309	floatuntixf \
310	lshrti3 \
311	modti3 \
312	multi3 \
313	mulvti3 \
314	negti2 \
315	negvti2 \
316	parityti2 \
317	popcountti2 \
318	subvti3 \
319	ucmpti2 \
320	udivmodti4 \
321	udivti3 \
322	umodti3
323
324# FIXME: Currently, compiler-rt is missing implementations for a number of the
325# functions that need to go into libcc_kext.a. Filter them out for now.
326CCKEXT_MISSING_FUNCTIONS := \
327	cmpdf2 cmpsf2 div0 \
328	ffssi2 \
329	udiv_w_sdiv unorddf2 unordsf2 bswapdi2 \
330	bswapsi2 \
331	gcc_bcmp \
332	do_global_dtors \
333	i686.get_pc_thunk.eax i686.get_pc_thunk.ebp i686.get_pc_thunk.ebx \
334	i686.get_pc_thunk.ecx i686.get_pc_thunk.edi i686.get_pc_thunk.edx \
335	i686.get_pc_thunk.esi \
336	aeabi_cdcmpeq aeabi_cdrcmple aeabi_cfcmpeq aeabi_cfrcmple aeabi_dcmpeq \
337	aeabi_dcmpge aeabi_dcmpgt aeabi_dcmple aeabi_dcmplt aeabi_drsub aeabi_fcmpeq \
338	aeabi_fcmpge aeabi_fcmpgt aeabi_fcmple aeabi_fcmplt aeabi_frsub aeabi_idivmod \
339	aeabi_uidivmod
340
341FUNCTIONS.cc_kext.armv6 := \
342	$(filter-out $(CCKEXT_MISSING_FUNCTIONS),$(FUNCTIONS.cc_kext.armv6))
343FUNCTIONS.cc_kext.armv7 := \
344	$(filter-out $(CCKEXT_MISSING_FUNCTIONS),$(FUNCTIONS.cc_kext.armv7))
345FUNCTIONS.cc_kext.i386 := \
346	$(filter-out $(CCKEXT_MISSING_FUNCTIONS),$(FUNCTIONS.cc_kext.i386))
347FUNCTIONS.cc_kext.x86_64 := \
348	$(filter-out $(CCKEXT_MISSING_FUNCTIONS),$(FUNCTIONS.cc_kext.x86_64))
349
350KERNEL_USE.cc_kext := 1
351
352VISIBILITY_HIDDEN := 1
353