clang_darwin.mk revision 55812b55319abed4fc77fdcb29310fe60b275717 
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 $$arch -c \
16	  $(ProjSrcRoot)/make/platform/clang_darwin_test_input.c \
17	  -o /dev/null > /dev/null 2> /dev/null; then \
18        result="$$result$$arch "; \
19      fi; \
20    done; \
21    echo $$result)
22
23###
24
25Configs :=
26UniversalArchs :=
27
28# Configuration solely for providing access to an eprintf symbol, which may
29# still be referenced from Darwin system headers. This symbol is only ever
30# needed on i386.
31Configs += eprintf
32UniversalArchs.eprintf := $(call CheckArches,i386)
33
34# Configuration for targetting 10.4. We need a few functions missing from
35# libgcc_s.10.4.dylib. We only build x86 slices since clang doesn't really
36# support targetting PowerPC.
37Configs += 10.4
38UniversalArchs.10.4 := $(call CheckArches,i386 x86_64)
39
40# Configuration for targetting iOS, for some ARMv6 functions, which must be
41# in the same linkage unit, and for a couple of other functions that didn't
42# make it into libSystem.
43Configs += ios
44UniversalArchs.ios := $(call CheckArches,i386 x86_64 armv6 armv7)
45
46# Configuration for targetting OSX. These functions may not be in libSystem
47# so we should provide our own.
48Configs += osx
49UniversalArchs.osx := $(call CheckArches,i386 x86_64)
50
51# Configuration for use with kernel/kexts.
52Configs += cc_kext
53UniversalArchs.cc_kext := $(call CheckArches,armv6 armv7 i386 x86_64)
54
55# If RC_SUPPORTED_ARCHS is defined, treat it as a list of the architectures we
56# are intended to support and limit what we try to build to that.
57#
58# We make sure to remove empty configs if we end up dropping all the requested
59# archs for a particular config.
60ifneq ($(RC_SUPPORTED_ARCHS),)
61$(foreach config,$(Configs),\
62  $(call Set,UniversalArchs.$(config),\
63	$(filter $(RC_SUPPORTED_ARCHS),$(UniversalArchs.$(config))))\
64  $(if $(UniversalArchs.$(config)),,\
65	$(call Set,Configs,$(filter-out $(config),$(Configs)))))
66endif
67
68###
69
70CC := clang
71
72# Forcibly strip off any -arch, as that totally breaks our universal support.
73override CC := $(subst -arch ,-arch_,$(CC))
74override CC := $(patsubst -arch_%,,$(CC))
75
76CFLAGS := -Wall -Werror -O3 -fomit-frame-pointer
77
78# Always set deployment target arguments for every build, these libraries should
79# never depend on the environmental overrides. We simply set them to minimum
80# supported deployment target -- nothing in the compiler-rt libraries should
81# actually depend on the deployment target.
82X86_DEPLOYMENT_ARGS := -mmacosx-version-min=10.4
83ARM_DEPLOYMENT_ARGS := -miphoneos-version-min=1.0
84
85# If an explicit ARM_SDK build variable is set, use that as the isysroot.
86ifneq ($(ARM_SDK),)
87ARM_DEPLOYMENT_ARGS += -isysroot $(ARM_SDK)
88endif
89
90CFLAGS.eprintf		:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
91CFLAGS.10.4		:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
92CFLAGS.ios.i386		:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
93CFLAGS.ios.x86_64	:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
94CFLAGS.ios.armv6	:= $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
95CFLAGS.ios.armv7	:= $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
96CFLAGS.osx.i386         := $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
97CFLAGS.osx.x86_64       := $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
98CFLAGS.osx.armv6        := $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
99CFLAGS.osx.armv7        := $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
100CFLAGS.cc_kext.i386	:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
101CFLAGS.cc_kext.x86_64	:= $(CFLAGS) $(X86_DEPLOYMENT_ARGS)
102CFLAGS.cc_kext.armv6	:= $(CFLAGS) $(ARM_DEPLOYMENT_ARGS) -mthumb
103CFLAGS.cc_kext.armv7	:= $(CFLAGS) $(ARM_DEPLOYMENT_ARGS)
104
105FUNCTIONS.eprintf := eprintf
106FUNCTIONS.10.4 := eprintf floatundidf floatundisf floatundixf
107
108FUNCTIONS.ios	    := divmodsi4 udivmodsi4 mulosi4 mulodi4 muloti4
109# On x86, the divmod functions reference divsi.
110FUNCTIONS.ios.i386   := $(FUNCTIONS.ios) \
111                        divsi3 udivsi3
112FUNCTIONS.ios.x86_64 := $(FUNCTIONS.ios) \
113                        divsi3 udivsi3
114FUNCTIONS.ios.armv6 := $(FUNCTIONS.ios) \
115                       sync_synchronize \
116                       switch16 switch32 switch8 switchu8 \
117                       save_vfp_d8_d15_regs restore_vfp_d8_d15_regs
118
119FUNCTIONS.osx	:= mulosi4 mulodi4 muloti4
120
121CCKEXT_COMMON_FUNCTIONS := \
122	absvdi2 \
123	absvsi2 \
124	addvdi3 \
125	addvsi3 \
126	ashldi3 \
127	ashrdi3 \
128	bswapdi2 \
129	bswapsi2 \
130	clzdi2 \
131	clzsi2 \
132	cmpdi2 \
133	ctzdi2 \
134	ctzsi2 \
135	divdc3 \
136	divdi3 \
137	divsc3 \
138	divmodsi4 \
139	udivmodsi4 \
140	do_global_dtors \
141	eprintf \
142	ffsdi2 \
143	fixdfdi \
144	fixsfdi \
145	fixunsdfdi \
146	fixunsdfsi \
147	fixunssfdi \
148	fixunssfsi \
149	floatdidf \
150	floatdisf \
151	floatundidf \
152	floatundisf \
153	gcc_bcmp \
154	lshrdi3 \
155	moddi3 \
156	muldc3 \
157	muldi3 \
158	mulsc3 \
159	mulvdi3 \
160	mulvsi3 \
161	negdi2 \
162	negvdi2 \
163	negvsi2 \
164	paritydi2 \
165	paritysi2 \
166	popcountdi2 \
167	popcountsi2 \
168	powidf2 \
169	powisf2 \
170	subvdi3 \
171	subvsi3 \
172	ucmpdi2 \
173	udiv_w_sdiv \
174	udivdi3 \
175	udivmoddi4 \
176	umoddi3
177
178CCKEXT_ARM_FUNCTIONS := $(CCKEXT_COMMON_FUNCTIONS) \
179	adddf3 \
180	addsf3 \
181	aeabi_cdcmpeq \
182	aeabi_cdrcmple \
183	aeabi_cfcmpeq \
184	aeabi_cfrcmple \
185	aeabi_dcmpeq \
186	aeabi_dcmpge \
187	aeabi_dcmpgt \
188	aeabi_dcmple \
189	aeabi_dcmplt \
190	aeabi_drsub \
191	aeabi_fcmpeq \
192	aeabi_fcmpge \
193	aeabi_fcmpgt \
194	aeabi_fcmple \
195	aeabi_fcmplt \
196	aeabi_frsub \
197	aeabi_idivmod \
198	aeabi_uidivmod \
199	cmpdf2 \
200	cmpsf2 \
201	div0 \
202	divdf3 \
203	divsf3 \
204	divsi3 \
205	extendsfdf2 \
206	ffssi2 \
207	fixdfsi \
208	fixsfsi \
209	floatsidf \
210	floatsisf \
211	floatunsidf \
212	floatunsisf \
213	comparedf2 \
214	comparesf2 \
215	modsi3 \
216	muldf3 \
217	mulsf3 \
218	negdf2 \
219	negsf2 \
220	subdf3 \
221	subsf3 \
222	switch16 \
223	switch32 \
224	switch8 \
225	switchu8 \
226	truncdfsf2 \
227	udivsi3 \
228	umodsi3 \
229	unorddf2 \
230	unordsf2
231
232CCKEXT_ARMVFP_FUNCTIONS := $(CCKEXT_ARM_FUNCTIONS) \
233	adddf3vfp \
234	addsf3vfp \
235	divdf3vfp \
236	divsf3vfp \
237	eqdf2vfp \
238	eqsf2vfp \
239	extendsfdf2vfp \
240	fixdfsivfp \
241	fixsfsivfp \
242	fixunsdfsivfp \
243	fixunssfsivfp \
244	floatsidfvfp \
245	floatsisfvfp \
246	floatunssidfvfp \
247	floatunssisfvfp \
248	gedf2vfp \
249	gesf2vfp \
250	gtdf2vfp \
251	gtsf2vfp \
252	ledf2vfp \
253	lesf2vfp \
254	ltdf2vfp \
255	ltsf2vfp \
256	muldf3vfp \
257	mulsf3vfp \
258	nedf2vfp \
259	nesf2vfp \
260	subdf3vfp \
261	subsf3vfp \
262	truncdfsf2vfp \
263	unorddf2vfp \
264	unordsf2vfp
265
266FUNCTIONS.cc_kext.armv6 := $(CCKEXT_ARMVFP_FUNCTIONS)
267FUNCTIONS.cc_kext.armv7 := $(CCKEXT_ARMVFP_FUNCTIONS)
268
269CCKEXT_X86_FUNCTIONS := $(CCKEXT_COMMON_FUNCTIONS) \
270	divxc3 \
271	fixunsxfdi \
272	fixunsxfsi \
273	fixxfdi \
274	floatdixf \
275	floatundixf \
276	mulxc3 \
277	powixf2
278
279FUNCTIONS.cc_kext.i386 := $(CCKEXT_X86_FUNCTIONS) \
280	ffssi2 \
281	i686.get_pc_thunk.eax \
282	i686.get_pc_thunk.ebp \
283	i686.get_pc_thunk.ebx \
284	i686.get_pc_thunk.ecx \
285	i686.get_pc_thunk.edi \
286	i686.get_pc_thunk.edx \
287	i686.get_pc_thunk.esi
288
289FUNCTIONS.cc_kext.x86_64 := $(CCKEXT_X86_FUNCTIONS) \
290	absvti2 \
291	addvti3 \
292	ashlti3 \
293	ashrti3 \
294	clzti2 \
295	cmpti2 \
296	ctzti2 \
297	divti3 \
298	ffsti2 \
299	fixdfti \
300	fixsfti \
301	fixunsdfti \
302	fixunssfti \
303	fixunsxfti \
304	fixxfti \
305	floattidf \
306	floattisf \
307	floattixf \
308	floatuntidf \
309	floatuntisf \
310	floatuntixf \
311	lshrti3 \
312	modti3 \
313	multi3 \
314	mulvti3 \
315	negti2 \
316	negvti2 \
317	parityti2 \
318	popcountti2 \
319	subvti3 \
320	ucmpti2 \
321	udivmodti4 \
322	udivti3 \
323	umodti3
324
325# FIXME: Currently, compiler-rt is missing implementations for a number of the
326# functions that need to go into libcc_kext.a. Filter them out for now.
327CCKEXT_MISSING_FUNCTIONS := \
328	cmpdf2 cmpsf2 div0 \
329	ffssi2 \
330	udiv_w_sdiv unorddf2 unordsf2 bswapdi2 \
331	bswapsi2 \
332	gcc_bcmp \
333	do_global_dtors \
334	i686.get_pc_thunk.eax i686.get_pc_thunk.ebp i686.get_pc_thunk.ebx \
335	i686.get_pc_thunk.ecx i686.get_pc_thunk.edi i686.get_pc_thunk.edx \
336	i686.get_pc_thunk.esi \
337	aeabi_cdcmpeq aeabi_cdrcmple aeabi_cfcmpeq aeabi_cfrcmple aeabi_dcmpeq \
338	aeabi_dcmpge aeabi_dcmpgt aeabi_dcmple aeabi_dcmplt aeabi_drsub aeabi_fcmpeq \
339	aeabi_fcmpge aeabi_fcmpgt aeabi_fcmple aeabi_fcmplt aeabi_frsub aeabi_idivmod \
340	aeabi_uidivmod
341
342FUNCTIONS.cc_kext.armv6 := \
343	$(filter-out $(CCKEXT_MISSING_FUNCTIONS),$(FUNCTIONS.cc_kext.armv6))
344FUNCTIONS.cc_kext.armv7 := \
345	$(filter-out $(CCKEXT_MISSING_FUNCTIONS),$(FUNCTIONS.cc_kext.armv7))
346FUNCTIONS.cc_kext.i386 := \
347	$(filter-out $(CCKEXT_MISSING_FUNCTIONS),$(FUNCTIONS.cc_kext.i386))
348FUNCTIONS.cc_kext.x86_64 := \
349	$(filter-out $(CCKEXT_MISSING_FUNCTIONS),$(FUNCTIONS.cc_kext.x86_64))
350
351KERNEL_USE.cc_kext := 1
352
353VISIBILITY_HIDDEN := 1
354