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1 | # These variables are specifically meant to be overridable via the make | |
2 | # command-line. | |
3 | # ?= doesn't work for CC and AR because make has a default value for them. | |
4 | ifeq ($(origin CC), default) | |
5 | CC := clang | |
6 | endif | |
7 | NM ?= $(patsubst %clang,%llvm-nm,$(filter-out ccache sccache,$(CC))) | |
8 | ifeq ($(origin AR), default) | |
9 | AR = $(patsubst %clang,%llvm-ar,$(filter-out ccache sccache,$(CC))) | |
10 | endif | |
11 | EXTRA_CFLAGS ?= -O2 -DNDEBUG | |
12 | # The directory where we build the sysroot. | |
13 | SYSROOT ?= $(CURDIR)/sysroot | |
14 | # A directory to install to for "make install". | |
15 | INSTALL_DIR ?= /usr/local | |
16 | # single or posix; note that pthread support is still a work-in-progress. | |
17 | THREAD_MODEL ?= single | |
18 | # dlmalloc or none | |
19 | MALLOC_IMPL ?= dlmalloc | |
20 | # yes or no | |
21 | BUILD_LIBC_TOP_HALF ?= yes | |
22 | # The directory where we will store intermediate artifacts. | |
23 | OBJDIR ?= $(CURDIR)/build | |
24 | ||
25 | # When the length is no larger than this threshold, we consider the | |
26 | # overhead of bulk memory opcodes to outweigh the performance benefit, | |
27 | # and fall back to the original musl implementation. See | |
28 | # https://github.com/WebAssembly/wasi-libc/pull/263 for relevant | |
29 | # discussion | |
30 | BULK_MEMORY_THRESHOLD ?= 32 | |
31 | ||
32 | # Variables from this point on are not meant to be overridable via the | |
33 | # make command-line. | |
34 | ||
35 | # Set the target variables. Multiarch triples notably omit the vendor field, | |
36 | # which happens to be what we do for the main target triple too. | |
37 | TARGET_TRIPLE = wasm32-wasi | |
38 | MULTIARCH_TRIPLE = wasm32-wasi | |
39 | ||
40 | # These variables describe the locations of various files and directories in | |
41 | # the source tree. | |
42 | DLMALLOC_DIR = $(CURDIR)/dlmalloc | |
43 | DLMALLOC_SRC_DIR = $(DLMALLOC_DIR)/src | |
44 | DLMALLOC_SOURCES = $(DLMALLOC_SRC_DIR)/dlmalloc.c | |
45 | DLMALLOC_INC = $(DLMALLOC_DIR)/include | |
46 | EMMALLOC_DIR = $(CURDIR)/emmalloc | |
47 | EMMALLOC_SOURCES = $(EMMALLOC_DIR)/emmalloc.c | |
48 | LIBC_BOTTOM_HALF_DIR = $(CURDIR)/libc-bottom-half | |
49 | LIBC_BOTTOM_HALF_CLOUDLIBC_SRC = $(LIBC_BOTTOM_HALF_DIR)/cloudlibc/src | |
50 | LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC = $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC)/include | |
51 | LIBC_BOTTOM_HALF_HEADERS_PUBLIC = $(LIBC_BOTTOM_HALF_DIR)/headers/public | |
52 | LIBC_BOTTOM_HALF_HEADERS_PRIVATE = $(LIBC_BOTTOM_HALF_DIR)/headers/private | |
53 | LIBC_BOTTOM_HALF_SOURCES = $(LIBC_BOTTOM_HALF_DIR)/sources | |
54 | LIBC_BOTTOM_HALF_ALL_SOURCES = \ | |
55 | $(sort \ | |
56 | $(shell find $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) -name \*.c) \ | |
57 | $(shell find $(LIBC_BOTTOM_HALF_SOURCES) -name \*.c)) | |
58 | ||
59 | # FIXME(https://reviews.llvm.org/D85567) - due to a bug in LLD the weak | |
60 | # references to a function defined in `chdir.c` only work if `chdir.c` is at the | |
61 | # end of the archive, but once that LLD review lands and propagates into LLVM | |
62 | # then we don't have to do this. | |
63 | LIBC_BOTTOM_HALF_ALL_SOURCES := $(filter-out $(LIBC_BOTTOM_HALF_SOURCES)/chdir.c,$(LIBC_BOTTOM_HALF_ALL_SOURCES)) | |
64 | LIBC_BOTTOM_HALF_ALL_SOURCES := $(LIBC_BOTTOM_HALF_ALL_SOURCES) $(LIBC_BOTTOM_HALF_SOURCES)/chdir.c | |
65 | ||
66 | LIBWASI_EMULATED_MMAN_SOURCES = \ | |
67 | $(sort $(shell find $(LIBC_BOTTOM_HALF_DIR)/mman -name \*.c)) | |
68 | LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES = \ | |
69 | $(sort $(shell find $(LIBC_BOTTOM_HALF_DIR)/clocks -name \*.c)) | |
70 | LIBWASI_EMULATED_GETPID_SOURCES = \ | |
71 | $(sort $(shell find $(LIBC_BOTTOM_HALF_DIR)/getpid -name \*.c)) | |
72 | LIBWASI_EMULATED_SIGNAL_SOURCES = \ | |
73 | $(sort $(shell find $(LIBC_BOTTOM_HALF_DIR)/signal -name \*.c)) | |
74 | LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES = \ | |
75 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/signal/psignal.c \ | |
76 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/strsignal.c | |
77 | LIBC_BOTTOM_HALF_CRT_SOURCES = $(wildcard $(LIBC_BOTTOM_HALF_DIR)/crt/*.c) | |
78 | LIBC_TOP_HALF_DIR = $(CURDIR)/libc-top-half | |
79 | LIBC_TOP_HALF_MUSL_DIR = $(LIBC_TOP_HALF_DIR)/musl | |
80 | LIBC_TOP_HALF_MUSL_SRC_DIR = $(LIBC_TOP_HALF_MUSL_DIR)/src | |
81 | LIBC_TOP_HALF_MUSL_INC = $(LIBC_TOP_HALF_MUSL_DIR)/include | |
82 | LIBC_TOP_HALF_MUSL_SOURCES = \ | |
83 | $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR)/, \ | |
84 | misc/a64l.c \ | |
85 | misc/basename.c \ | |
86 | misc/dirname.c \ | |
87 | misc/ffs.c \ | |
88 | misc/ffsl.c \ | |
89 | misc/ffsll.c \ | |
90 | misc/fmtmsg.c \ | |
91 | misc/getdomainname.c \ | |
92 | misc/gethostid.c \ | |
93 | misc/getopt.c \ | |
94 | misc/getopt_long.c \ | |
95 | misc/getsubopt.c \ | |
96 | misc/uname.c \ | |
97 | misc/nftw.c \ | |
98 | errno/strerror.c \ | |
99 | network/htonl.c \ | |
100 | network/htons.c \ | |
101 | network/ntohl.c \ | |
102 | network/ntohs.c \ | |
103 | network/inet_ntop.c \ | |
104 | network/inet_pton.c \ | |
105 | network/inet_aton.c \ | |
106 | network/in6addr_any.c \ | |
107 | network/in6addr_loopback.c \ | |
108 | fenv/fenv.c \ | |
109 | fenv/fesetround.c \ | |
110 | fenv/feupdateenv.c \ | |
111 | fenv/fesetexceptflag.c \ | |
112 | fenv/fegetexceptflag.c \ | |
113 | fenv/feholdexcept.c \ | |
114 | exit/exit.c \ | |
115 | exit/atexit.c \ | |
116 | exit/assert.c \ | |
117 | exit/quick_exit.c \ | |
118 | exit/at_quick_exit.c \ | |
119 | time/strftime.c \ | |
120 | time/asctime.c \ | |
121 | time/asctime_r.c \ | |
122 | time/ctime.c \ | |
123 | time/ctime_r.c \ | |
124 | time/wcsftime.c \ | |
125 | time/strptime.c \ | |
126 | time/difftime.c \ | |
127 | time/timegm.c \ | |
128 | time/ftime.c \ | |
129 | time/gmtime.c \ | |
130 | time/gmtime_r.c \ | |
131 | time/timespec_get.c \ | |
132 | time/getdate.c \ | |
133 | time/localtime.c \ | |
134 | time/localtime_r.c \ | |
135 | time/mktime.c \ | |
136 | time/__tm_to_secs.c \ | |
137 | time/__month_to_secs.c \ | |
138 | time/__secs_to_tm.c \ | |
139 | time/__year_to_secs.c \ | |
140 | time/__tz.c \ | |
141 | fcntl/creat.c \ | |
142 | dirent/alphasort.c \ | |
143 | dirent/versionsort.c \ | |
144 | env/__stack_chk_fail.c \ | |
145 | env/clearenv.c \ | |
146 | env/getenv.c \ | |
147 | env/putenv.c \ | |
148 | env/setenv.c \ | |
149 | env/unsetenv.c \ | |
150 | unistd/posix_close.c \ | |
151 | stat/futimesat.c \ | |
152 | legacy/getpagesize.c \ | |
153 | thread/thrd_sleep.c \ | |
154 | ) \ | |
155 | $(filter-out %/procfdname.c %/syscall.c %/syscall_ret.c %/vdso.c %/version.c, \ | |
156 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/*.c)) \ | |
157 | $(filter-out %/flockfile.c %/funlockfile.c %/__lockfile.c %/ftrylockfile.c \ | |
158 | %/rename.c \ | |
159 | %/tmpnam.c %/tmpfile.c %/tempnam.c \ | |
160 | %/popen.c %/pclose.c \ | |
161 | %/remove.c \ | |
162 | %/gets.c, \ | |
163 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/*.c)) \ | |
164 | $(filter-out %/strsignal.c, \ | |
165 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/*.c)) \ | |
166 | $(filter-out %/dcngettext.c %/textdomain.c %/bind_textdomain_codeset.c, \ | |
167 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/locale/*.c)) \ | |
168 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/*.c) \ | |
169 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/search/*.c) \ | |
170 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/multibyte/*.c) \ | |
171 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/regex/*.c) \ | |
172 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/prng/*.c) \ | |
173 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/conf/*.c) \ | |
174 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/ctype/*.c) \ | |
175 | $(filter-out %/__signbit.c %/__signbitf.c %/__signbitl.c \ | |
176 | %/__fpclassify.c %/__fpclassifyf.c %/__fpclassifyl.c \ | |
177 | %/ceilf.c %/ceil.c \ | |
178 | %/floorf.c %/floor.c \ | |
179 | %/truncf.c %/trunc.c \ | |
180 | %/rintf.c %/rint.c \ | |
181 | %/nearbyintf.c %/nearbyint.c \ | |
182 | %/sqrtf.c %/sqrt.c \ | |
183 | %/fabsf.c %/fabs.c \ | |
184 | %/copysignf.c %/copysign.c \ | |
185 | %/fminf.c %/fmaxf.c \ | |
186 | %/fmin.c %/fmax.c, \ | |
187 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/math/*.c)) \ | |
188 | $(filter-out %/crealf.c %/creal.c %creall.c \ | |
189 | %/cimagf.c %/cimag.c %cimagl.c, \ | |
190 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/complex/*.c)) \ | |
191 | $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/crypt/*.c) | |
192 | ||
193 | ifeq ($(THREAD_MODEL), posix) | |
194 | LIBC_TOP_HALF_MUSL_SOURCES += \ | |
195 | $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR)/, \ | |
196 | env/__init_tls.c \ | |
197 | stdio/__lockfile.c \ | |
198 | thread/__lock.c \ | |
199 | thread/__wait.c \ | |
200 | thread/__timedwait.c \ | |
201 | thread/default_attr.c \ | |
202 | thread/pthread_attr_destroy.c \ | |
203 | thread/pthread_attr_init.c \ | |
204 | thread/pthread_attr_setstack.c \ | |
205 | thread/pthread_attr_setstacksize.c \ | |
206 | thread/pthread_cleanup_push.c \ | |
207 | thread/pthread_cond_broadcast.c \ | |
208 | thread/pthread_cond_destroy.c \ | |
209 | thread/pthread_cond_init.c \ | |
210 | thread/pthread_cond_signal.c \ | |
211 | thread/pthread_cond_timedwait.c \ | |
212 | thread/pthread_cond_wait.c \ | |
213 | thread/pthread_condattr_destroy.c \ | |
214 | thread/pthread_condattr_init.c \ | |
215 | thread/pthread_condattr_setclock.c \ | |
216 | thread/pthread_condattr_setpshared.c \ | |
217 | thread/pthread_create.c \ | |
218 | thread/pthread_getspecific.c \ | |
219 | thread/pthread_join.c \ | |
220 | thread/pthread_key_create.c \ | |
221 | thread/pthread_mutex_consistent.c \ | |
222 | thread/pthread_mutex_destroy.c \ | |
223 | thread/pthread_mutex_init.c \ | |
224 | thread/pthread_mutex_getprioceiling.c \ | |
225 | thread/pthread_mutex_lock.c \ | |
226 | thread/pthread_mutex_timedlock.c \ | |
227 | thread/pthread_mutex_trylock.c \ | |
228 | thread/pthread_mutex_unlock.c \ | |
229 | thread/pthread_mutexattr_destroy.c \ | |
230 | thread/pthread_mutexattr_init.c \ | |
231 | thread/pthread_mutexattr_setprotocol.c \ | |
232 | thread/pthread_mutexattr_setpshared.c \ | |
233 | thread/pthread_mutexattr_setrobust.c \ | |
234 | thread/pthread_mutexattr_settype.c \ | |
235 | thread/pthread_once.c \ | |
236 | thread/pthread_rwlock_destroy.c \ | |
237 | thread/pthread_rwlock_init.c \ | |
238 | thread/pthread_rwlock_rdlock.c \ | |
239 | thread/pthread_rwlock_timedrdlock.c \ | |
240 | thread/pthread_rwlock_timedwrlock.c \ | |
241 | thread/pthread_rwlock_tryrdlock.c \ | |
242 | thread/pthread_rwlock_trywrlock.c \ | |
243 | thread/pthread_rwlock_unlock.c \ | |
244 | thread/pthread_rwlock_wrlock.c \ | |
245 | thread/pthread_rwlockattr_destroy.c \ | |
246 | thread/pthread_rwlockattr_init.c \ | |
247 | thread/pthread_rwlockattr_setpshared.c \ | |
248 | thread/pthread_setcancelstate.c \ | |
249 | thread/pthread_setspecific.c \ | |
250 | thread/pthread_self.c \ | |
251 | thread/pthread_testcancel.c \ | |
252 | thread/sem_destroy.c \ | |
253 | thread/sem_getvalue.c \ | |
254 | thread/sem_init.c \ | |
255 | thread/sem_post.c \ | |
256 | thread/sem_timedwait.c \ | |
257 | thread/sem_trywait.c \ | |
258 | thread/sem_wait.c \ | |
259 | ) | |
260 | endif | |
261 | ||
262 | MUSL_PRINTSCAN_SOURCES = \ | |
263 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/floatscan.c \ | |
264 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfprintf.c \ | |
265 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfwprintf.c \ | |
266 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfscanf.c \ | |
267 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/strtod.c \ | |
268 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/wcstod.c | |
269 | BULK_MEMORY_SOURCES = \ | |
270 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memcpy.c \ | |
271 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memmove.c \ | |
272 | $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memset.c | |
273 | LIBC_TOP_HALF_HEADERS_PRIVATE = $(LIBC_TOP_HALF_DIR)/headers/private | |
274 | LIBC_TOP_HALF_SOURCES = $(LIBC_TOP_HALF_DIR)/sources | |
275 | LIBC_TOP_HALF_ALL_SOURCES = \ | |
276 | $(LIBC_TOP_HALF_MUSL_SOURCES) \ | |
277 | $(sort $(shell find $(LIBC_TOP_HALF_SOURCES) -name \*.c)) | |
278 | ||
279 | # Add any extra flags | |
280 | CFLAGS = $(EXTRA_CFLAGS) | |
281 | # Set the target. | |
282 | CFLAGS += --target=$(TARGET_TRIPLE) | |
283 | # WebAssembly floating-point match doesn't trap. | |
284 | # TODO: Add -fno-signaling-nans when the compiler supports it. | |
285 | CFLAGS += -fno-trapping-math | |
286 | # Add all warnings, but disable a few which occur in third-party code. | |
287 | CFLAGS += -Wall -Wextra -Werror \ | |
288 | -Wno-null-pointer-arithmetic \ | |
289 | -Wno-unused-parameter \ | |
290 | -Wno-sign-compare \ | |
291 | -Wno-unused-variable \ | |
292 | -Wno-unused-function \ | |
293 | -Wno-ignored-attributes \ | |
294 | -Wno-missing-braces \ | |
295 | -Wno-ignored-pragmas \ | |
296 | -Wno-unused-but-set-variable \ | |
297 | -Wno-unknown-warning-option | |
298 | ||
299 | # Configure support for threads. | |
300 | ifeq ($(THREAD_MODEL), single) | |
301 | CFLAGS += -mthread-model single | |
302 | endif | |
303 | ifeq ($(THREAD_MODEL), posix) | |
304 | # Specify the tls-model until LLVM 15 is released (which should contain | |
305 | # https://reviews.llvm.org/D130053). | |
306 | CFLAGS += -mthread-model posix -pthread -ftls-model=local-exec | |
307 | ||
308 | # Include cloudlib's directory to access the structure definition of clockid_t | |
309 | CFLAGS += -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) | |
310 | endif | |
311 | ||
312 | # Expose the public headers to the implementation. We use `-isystem` for | |
313 | # purpose for two reasons: | |
314 | # | |
315 | # 1. It only does `<...>` not `"...."` lookup. We are making a libc, | |
316 | # which is a system library, so all public headers should be | |
317 | # accessible via `<...>` and never also need `"..."`. `-isystem` main | |
318 | # purpose is to only effect `<...>` lookup. | |
319 | # | |
320 | # 2. The `-I` for private headers added for specific C files below | |
321 | # should come earlier in the search path, so they can "override" | |
322 | # and/or `#include_next` the public headers. `-isystem` (like | |
323 | # `-idirafter`) comes later in the search path than `-I`. | |
324 | CFLAGS += -isystem "$(SYSROOT_INC)" | |
325 | ||
326 | # These variables describe the locations of various files and directories in | |
327 | # the build tree. | |
328 | objs = $(patsubst $(CURDIR)/%.c,$(OBJDIR)/%.o,$(1)) | |
329 | DLMALLOC_OBJS = $(call objs,$(DLMALLOC_SOURCES)) | |
330 | EMMALLOC_OBJS = $(call objs,$(EMMALLOC_SOURCES)) | |
331 | LIBC_BOTTOM_HALF_ALL_OBJS = $(call objs,$(LIBC_BOTTOM_HALF_ALL_SOURCES)) | |
332 | LIBC_TOP_HALF_ALL_OBJS = $(call objs,$(LIBC_TOP_HALF_ALL_SOURCES)) | |
333 | ifeq ($(MALLOC_IMPL),dlmalloc) | |
334 | LIBC_OBJS += $(DLMALLOC_OBJS) | |
335 | else ifeq ($(MALLOC_IMPL),emmalloc) | |
336 | LIBC_OBJS += $(EMMALLOC_OBJS) | |
337 | else ifeq ($(MALLOC_IMPL),none) | |
338 | # No object files to add. | |
339 | else | |
340 | $(error unknown malloc implementation $(MALLOC_IMPL)) | |
341 | endif | |
342 | # Add libc-bottom-half's objects. | |
343 | LIBC_OBJS += $(LIBC_BOTTOM_HALF_ALL_OBJS) | |
344 | ifeq ($(BUILD_LIBC_TOP_HALF),yes) | |
345 | # libc-top-half is musl. | |
346 | LIBC_OBJS += $(LIBC_TOP_HALF_ALL_OBJS) | |
347 | endif | |
348 | MUSL_PRINTSCAN_OBJS = $(call objs,$(MUSL_PRINTSCAN_SOURCES)) | |
349 | MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS)) | |
350 | MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS)) | |
351 | BULK_MEMORY_OBJS = $(call objs,$(BULK_MEMORY_SOURCES)) | |
352 | LIBWASI_EMULATED_MMAN_OBJS = $(call objs,$(LIBWASI_EMULATED_MMAN_SOURCES)) | |
353 | LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS = $(call objs,$(LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES)) | |
354 | LIBWASI_EMULATED_GETPID_OBJS = $(call objs,$(LIBWASI_EMULATED_GETPID_SOURCES)) | |
355 | LIBWASI_EMULATED_SIGNAL_OBJS = $(call objs,$(LIBWASI_EMULATED_SIGNAL_SOURCES)) | |
356 | LIBWASI_EMULATED_SIGNAL_MUSL_OBJS = $(call objs,$(LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES)) | |
357 | ||
358 | # These variables describe the locations of various files and | |
359 | # directories in the generated sysroot tree. | |
360 | SYSROOT_LIB := $(SYSROOT)/lib/$(MULTIARCH_TRIPLE) | |
361 | SYSROOT_INC = $(SYSROOT)/include | |
362 | SYSROOT_SHARE = $(SYSROOT)/share/$(MULTIARCH_TRIPLE) | |
363 | ||
364 | # Files from musl's include directory that we don't want to install in the | |
365 | # sysroot's include directory. | |
366 | MUSL_OMIT_HEADERS := | |
367 | ||
368 | # Remove files which aren't headers (we generate alltypes.h below). | |
369 | MUSL_OMIT_HEADERS += \ | |
370 | "bits/syscall.h.in" \ | |
371 | "bits/alltypes.h.in" \ | |
372 | "alltypes.h.in" | |
373 | ||
374 | # Use the compiler's version of these headers. | |
375 | MUSL_OMIT_HEADERS += \ | |
376 | "stdarg.h" \ | |
377 | "stddef.h" | |
378 | ||
379 | # Use the WASI errno definitions. | |
380 | MUSL_OMIT_HEADERS += \ | |
381 | "bits/errno.h" | |
382 | ||
383 | # Remove headers that aren't supported yet or that aren't relevant for WASI. | |
384 | MUSL_OMIT_HEADERS += \ | |
385 | "sys/procfs.h" \ | |
386 | "sys/user.h" \ | |
387 | "sys/kd.h" "sys/vt.h" "sys/soundcard.h" "sys/sem.h" \ | |
388 | "sys/shm.h" "sys/msg.h" "sys/ipc.h" "sys/ptrace.h" \ | |
389 | "sys/statfs.h" \ | |
390 | "bits/kd.h" "bits/vt.h" "bits/soundcard.h" "bits/sem.h" \ | |
391 | "bits/shm.h" "bits/msg.h" "bits/ipc.h" "bits/ptrace.h" \ | |
392 | "bits/statfs.h" \ | |
393 | "sys/vfs.h" \ | |
394 | "sys/statvfs.h" \ | |
395 | "syslog.h" "sys/syslog.h" \ | |
396 | "wait.h" "sys/wait.h" \ | |
397 | "ucontext.h" "sys/ucontext.h" \ | |
398 | "paths.h" \ | |
399 | "utmp.h" "utmpx.h" \ | |
400 | "lastlog.h" \ | |
401 | "sys/acct.h" \ | |
402 | "sys/cachectl.h" \ | |
403 | "sys/epoll.h" "sys/reboot.h" "sys/swap.h" \ | |
404 | "sys/sendfile.h" "sys/inotify.h" \ | |
405 | "sys/quota.h" \ | |
406 | "sys/klog.h" \ | |
407 | "sys/fsuid.h" \ | |
408 | "sys/io.h" \ | |
409 | "sys/prctl.h" \ | |
410 | "sys/mtio.h" \ | |
411 | "sys/mount.h" \ | |
412 | "sys/fanotify.h" \ | |
413 | "sys/personality.h" \ | |
414 | "elf.h" "link.h" "bits/link.h" \ | |
415 | "scsi/scsi.h" "scsi/scsi_ioctl.h" "scsi/sg.h" \ | |
416 | "sys/auxv.h" \ | |
417 | "pwd.h" "shadow.h" "grp.h" \ | |
418 | "mntent.h" \ | |
419 | "netdb.h" \ | |
420 | "resolv.h" \ | |
421 | "pty.h" \ | |
422 | "dlfcn.h" \ | |
423 | "setjmp.h" \ | |
424 | "ulimit.h" \ | |
425 | "sys/xattr.h" \ | |
426 | "wordexp.h" \ | |
427 | "spawn.h" \ | |
428 | "sys/membarrier.h" \ | |
429 | "sys/signalfd.h" \ | |
430 | "termios.h" \ | |
431 | "sys/termios.h" \ | |
432 | "bits/termios.h" \ | |
433 | "net/if.h" \ | |
434 | "net/if_arp.h" \ | |
435 | "net/ethernet.h" \ | |
436 | "net/route.h" \ | |
437 | "netinet/if_ether.h" \ | |
438 | "netinet/ether.h" \ | |
439 | "sys/timerfd.h" \ | |
440 | "libintl.h" \ | |
441 | "sys/sysmacros.h" \ | |
442 | "aio.h" | |
443 | ||
444 | ifeq ($(THREAD_MODEL), single) | |
445 | # Remove headers not supported in single-threaded mode. | |
446 | MUSL_OMIT_HEADERS += "pthread.h" | |
447 | endif | |
448 | ||
449 | default: finish | |
450 | ||
451 | $(SYSROOT_LIB)/libc.a: $(LIBC_OBJS) | |
452 | ||
453 | $(SYSROOT_LIB)/libc-printscan-long-double.a: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) | |
454 | ||
455 | $(SYSROOT_LIB)/libc-printscan-no-floating-point.a: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS) | |
456 | ||
457 | $(SYSROOT_LIB)/libwasi-emulated-mman.a: $(LIBWASI_EMULATED_MMAN_OBJS) | |
458 | ||
459 | $(SYSROOT_LIB)/libwasi-emulated-process-clocks.a: $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS) | |
460 | ||
461 | $(SYSROOT_LIB)/libwasi-emulated-getpid.a: $(LIBWASI_EMULATED_GETPID_OBJS) | |
462 | ||
463 | $(SYSROOT_LIB)/libwasi-emulated-signal.a: $(LIBWASI_EMULATED_SIGNAL_OBJS) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS) | |
464 | ||
465 | %.a: | |
466 | @mkdir -p "$(@D)" | |
467 | # On Windows, the commandline for the ar invocation got too long, so it needs to be split up. | |
468 | $(AR) crs $@ $(wordlist 1, 199, $^) | |
469 | $(AR) crs $@ $(wordlist 200, 399, $^) | |
470 | $(AR) crs $@ $(wordlist 400, 599, $^) | |
471 | $(AR) crs $@ $(wordlist 600, 799, $^) | |
472 | # This might eventually overflow again, but at least it'll do so in a loud way instead of | |
473 | # silently dropping the tail. | |
474 | $(AR) crs $@ $(wordlist 800, 100000, $^) | |
475 | ||
476 | $(MUSL_PRINTSCAN_OBJS): CFLAGS += \ | |
477 | -D__wasilibc_printscan_no_long_double \ | |
478 | -D__wasilibc_printscan_full_support_option="\"add -lc-printscan-long-double to the link command\"" | |
479 | ||
480 | $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): CFLAGS += \ | |
481 | -D__wasilibc_printscan_no_floating_point \ | |
482 | -D__wasilibc_printscan_floating_point_support_option="\"remove -lc-printscan-no-floating-point from the link command\"" | |
483 | ||
484 | # TODO: apply -mbulk-memory globally, once | |
485 | # https://github.com/llvm/llvm-project/issues/52618 is resolved | |
486 | $(BULK_MEMORY_OBJS): CFLAGS += \ | |
487 | -mbulk-memory | |
488 | ||
489 | $(BULK_MEMORY_OBJS): CFLAGS += \ | |
490 | -DBULK_MEMORY_THRESHOLD=$(BULK_MEMORY_THRESHOLD) | |
491 | ||
492 | $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS): CFLAGS += \ | |
493 | -D_WASI_EMULATED_SIGNAL | |
494 | ||
495 | $(OBJDIR)/%.long-double.o: $(CURDIR)/%.c include_dirs | |
496 | @mkdir -p "$(@D)" | |
497 | $(CC) $(CFLAGS) -MD -MP -o $@ -c $< | |
498 | ||
499 | $(OBJDIR)/%.no-floating-point.o: $(CURDIR)/%.c include_dirs | |
500 | @mkdir -p "$(@D)" | |
501 | $(CC) $(CFLAGS) -MD -MP -o $@ -c $< | |
502 | ||
503 | $(OBJDIR)/%.o: $(CURDIR)/%.c include_dirs | |
504 | @mkdir -p "$(@D)" | |
505 | $(CC) $(CFLAGS) -MD -MP -o $@ -c $< | |
506 | ||
507 | -include $(shell find $(OBJDIR) -name \*.d) | |
508 | ||
509 | $(DLMALLOC_OBJS): CFLAGS += \ | |
510 | -I$(DLMALLOC_INC) | |
511 | ||
512 | startup_files $(LIBC_BOTTOM_HALF_ALL_OBJS): CFLAGS += \ | |
513 | -I$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE) \ | |
514 | -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC) \ | |
515 | -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) \ | |
516 | -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/include \ | |
517 | -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal | |
518 | ||
519 | $(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS): CFLAGS += \ | |
520 | -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/include \ | |
521 | -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal \ | |
522 | -I$(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32 \ | |
523 | -I$(LIBC_TOP_HALF_MUSL_DIR)/arch/generic \ | |
524 | -I$(LIBC_TOP_HALF_HEADERS_PRIVATE) \ | |
525 | -Wno-parentheses \ | |
526 | -Wno-shift-op-parentheses \ | |
527 | -Wno-bitwise-op-parentheses \ | |
528 | -Wno-logical-op-parentheses \ | |
529 | -Wno-string-plus-int \ | |
530 | -Wno-dangling-else \ | |
531 | -Wno-unknown-pragmas | |
532 | ||
533 | $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS): CFLAGS += \ | |
534 | -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) | |
535 | ||
536 | include_dirs: | |
537 | # | |
538 | # Install the include files. | |
539 | # | |
540 | mkdir -p "$(SYSROOT_INC)" | |
541 | cp -r "$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)" | |
542 | ||
543 | # Generate musl's bits/alltypes.h header. | |
544 | mkdir -p "$(SYSROOT_INC)/bits" | |
545 | sed -f $(LIBC_TOP_HALF_MUSL_DIR)/tools/mkalltypes.sed \ | |
546 | $(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32/bits/alltypes.h.in \ | |
547 | $(LIBC_TOP_HALF_MUSL_DIR)/include/alltypes.h.in \ | |
548 | > "$(SYSROOT_INC)/bits/alltypes.h" | |
549 | ||
550 | # Copy in the bulk of musl's public header files. | |
551 | cp -r "$(LIBC_TOP_HALF_MUSL_INC)"/* "$(SYSROOT_INC)" | |
552 | # Copy in the musl's "bits" header files. | |
553 | cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/generic/bits/* "$(SYSROOT_INC)/bits" | |
554 | cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/wasm32/bits/* "$(SYSROOT_INC)/bits" | |
555 | ||
556 | # Remove selected header files. | |
557 | $(RM) $(patsubst %,$(SYSROOT_INC)/%,$(MUSL_OMIT_HEADERS)) | |
558 | ||
559 | startup_files: include_dirs | |
560 | # | |
561 | # Build the startup files. | |
562 | # | |
563 | @mkdir -p "$(OBJDIR)" | |
564 | cd "$(OBJDIR)" && \ | |
565 | $(CC) $(CFLAGS) -c $(LIBC_BOTTOM_HALF_CRT_SOURCES) -MD -MP && \ | |
566 | mkdir -p "$(SYSROOT_LIB)" && \ | |
567 | mv *.o "$(SYSROOT_LIB)" | |
568 | ||
569 | libc: include_dirs \ | |
570 | $(SYSROOT_LIB)/libc.a \ | |
571 | $(SYSROOT_LIB)/libc-printscan-long-double.a \ | |
572 | $(SYSROOT_LIB)/libc-printscan-no-floating-point.a \ | |
573 | $(SYSROOT_LIB)/libwasi-emulated-mman.a \ | |
574 | $(SYSROOT_LIB)/libwasi-emulated-process-clocks.a \ | |
575 | $(SYSROOT_LIB)/libwasi-emulated-getpid.a \ | |
576 | $(SYSROOT_LIB)/libwasi-emulated-signal.a | |
577 | ||
578 | finish: startup_files libc | |
579 | # | |
580 | # Create empty placeholder libraries. | |
581 | # | |
582 | for name in m rt pthread crypt util xnet resolv dl; do \ | |
583 | $(AR) crs "$(SYSROOT_LIB)/lib$${name}.a"; \ | |
584 | done | |
585 | ||
586 | # | |
587 | # The build succeeded! The generated sysroot is in $(SYSROOT). | |
588 | # | |
589 | ||
590 | # The check for defined and undefined symbols expects there to be a heap | |
591 | # alloctor (providing malloc, calloc, free, etc). Skip this step if the build | |
592 | # is done without a malloc implementation. | |
593 | ifneq ($(MALLOC_IMPL),none) | |
594 | finish: check-symbols | |
595 | endif | |
596 | ||
597 | DEFINED_SYMBOLS = $(SYSROOT_SHARE)/defined-symbols.txt | |
598 | UNDEFINED_SYMBOLS = $(SYSROOT_SHARE)/undefined-symbols.txt | |
599 | ||
600 | check-symbols: startup_files libc | |
601 | # | |
602 | # Collect metadata on the sysroot and perform sanity checks. | |
603 | # | |
604 | mkdir -p "$(SYSROOT_SHARE)" | |
605 | ||
606 | # | |
607 | # Collect symbol information. | |
608 | # | |
609 | @# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on | |
610 | @# LLVM PR40497, which is fixed in 9.0, but not in 8.0. | |
611 | @# Ignore certain llvm builtin symbols such as those starting with __mul | |
612 | @# since these dependencies can vary between llvm versions. | |
613 | "$(NM)" --defined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/libwasi-emulated-*.a "$(SYSROOT_LIB)"/*.o \ | |
614 | |grep ' [[:upper:]] ' |sed 's/.* [[:upper:]] //' |LC_ALL=C sort |uniq > "$(DEFINED_SYMBOLS)" | |
615 | for undef_sym in $$("$(NM)" --undefined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/libc-*.a "$(SYSROOT_LIB)"/*.o \ | |
616 | |grep ' U ' |sed 's/.* U //' |LC_ALL=C sort |uniq); do \ | |
617 | grep -q '\<'$$undef_sym'\>' "$(DEFINED_SYMBOLS)" || echo $$undef_sym; \ | |
618 | done | grep -v "^__mul" > "$(UNDEFINED_SYMBOLS)" | |
619 | grep '^_*imported_wasi_' "$(UNDEFINED_SYMBOLS)" \ | |
620 | > "$(SYSROOT_LIB)/libc.imports" | |
621 | ||
622 | # | |
623 | # Generate a test file that includes all public C header files. | |
624 | # | |
625 | cd "$(SYSROOT_INC)" && \ | |
626 | for header in $$(find . -type f -not -name mman.h -not -name signal.h -not -name times.h -not -name resource.h |grep -v /bits/ |grep -v /c++/); do \ | |
627 | echo '#include <'$$header'>' | sed 's/\.\///' ; \ | |
628 | done |LC_ALL=C sort >$(SYSROOT_SHARE)/include-all.c ; \ | |
629 | cd - >/dev/null | |
630 | ||
631 | # | |
632 | # Test that it compiles. | |
633 | # | |
634 | $(CC) $(CFLAGS) -fsyntax-only "$(SYSROOT_SHARE)/include-all.c" -Wno-\#warnings | |
635 | ||
636 | # | |
637 | # Collect all the predefined macros, except for compiler version macros | |
638 | # which we don't need to track here. | |
639 | # | |
640 | @# | |
641 | @# For the __*_ATOMIC_*_LOCK_FREE macros, squash individual compiler names | |
642 | @# to attempt, toward keeping these files compiler-independent. | |
643 | @# | |
644 | @# We have to add `-isystem $(SYSROOT_INC)` because otherwise clang puts | |
645 | @# its builtin include path first, which produces compiler-specific | |
646 | @# output. | |
647 | @# | |
648 | @# TODO: Undefine __FLOAT128__ for now since it's not in clang 8.0. | |
649 | @# TODO: Filter out __FLT16_* for now, as not all versions of clang have these. | |
650 | @# TODO: Filter out __NO_MATH_ERRNO_ and a few __*WIDTH__ that are new to clang 14. | |
651 | @# TODO: clang defined __FLT_EVAL_METHOD__ until clang 15, so we force-undefine it | |
652 | @# for older versions. | |
653 | $(CC) $(CFLAGS) "$(SYSROOT_SHARE)/include-all.c" \ | |
654 | -isystem $(SYSROOT_INC) \ | |
655 | -std=gnu17 \ | |
656 | -E -dM -Wno-\#warnings \ | |
657 | -D_ALL_SOURCE \ | |
658 | -U__llvm__ \ | |
659 | -U__clang__ \ | |
660 | -U__clang_major__ \ | |
661 | -U__clang_minor__ \ | |
662 | -U__clang_patchlevel__ \ | |
663 | -U__clang_version__ \ | |
664 | -U__clang_literal_encoding__ \ | |
665 | -U__clang_wide_literal_encoding__ \ | |
666 | -U__GNUC__ \ | |
667 | -U__GNUC_MINOR__ \ | |
668 | -U__GNUC_PATCHLEVEL__ \ | |
669 | -U__VERSION__ \ | |
670 | -U__FLOAT128__ \ | |
671 | -U__NO_MATH_ERRNO__ \ | |
672 | -U__BITINT_MAXWIDTH__ \ | |
673 | -U__FLT_EVAL_METHOD__ -Wno-builtin-macro-redefined \ | |
674 | | sed -e 's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \ | |
675 | | grep -v '^#define __FLT16_' \ | |
676 | | grep -v '^#define __\(BOOL\|INT_\(LEAST\|FAST\)\(8\|16\|32\|64\)\|INT\|LONG\|LLONG\|SHRT\)_WIDTH__' \ | |
677 | > "$(SYSROOT_SHARE)/predefined-macros.txt" | |
678 | ||
679 | # Check that the computed metadata matches the expected metadata. | |
680 | # This ignores whitespace because on Windows the output has CRLF line endings. | |
681 | diff -wur "$(CURDIR)/expected/$(MULTIARCH_TRIPLE)/$(THREAD_MODEL)" "$(SYSROOT_SHARE)" | |
682 | ||
683 | install: finish | |
684 | mkdir -p "$(INSTALL_DIR)" | |
685 | cp -r "$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)" | |
686 | ||
687 | clean: | |
688 | $(RM) -r "$(OBJDIR)" | |
689 | $(RM) -r "$(SYSROOT)" | |
690 | ||
691 | .PHONY: default startup_files libc finish install include_dirs clean |