1 # These variables are specifically meant to be overridable via the make
3 # ?= doesn't work for CC and AR because make has a default value for them.
4 ifeq ($(origin CC
), default
)
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
)))
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
19 MALLOC_IMPL ?
= dlmalloc
21 BUILD_LIBC_TOP_HALF ?
= yes
22 # The directory where we will store intermediate artifacts.
23 OBJDIR ?
= $(CURDIR
)/build
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
30 BULK_MEMORY_THRESHOLD ?
= 32
32 # Variables from this point on are not meant to be overridable via the
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
40 # These variables describe the locations of various files and directories in
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
= \
56 $(shell find
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
) -name \
*.c
) \
57 $(shell find
$(LIBC_BOTTOM_HALF_SOURCES
) -name \
*.c
))
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
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
)/, \
91 misc
/getdomainname.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 \
111 fenv
/fesetexceptflag.c \
112 fenv
/fegetexceptflag.c \
113 fenv
/feholdexcept.c \
118 exit
/at_quick_exit.c \
131 time
/timespec_get.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 \
143 dirent
/versionsort.c \
144 env
/__stack_chk_fail.c \
150 unistd
/posix_close.c \
152 legacy
/getpagesize.c \
153 thread
/thrd_sleep.c \
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 \
159 %/tmpnam.c
%/tmpfile.c
%/tempnam.c \
160 %/popen.c
%/pclose.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 \
178 %/floorf.c
%/floor.c \
179 %/truncf.c
%/trunc.c \
181 %/nearbyintf.c
%/nearbyint.c \
184 %/copysignf.c
%/copysign.c \
185 %/fminf.c
%/fmaxf.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 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/crypt
/*.c
)
193 ifeq ($(THREAD_MODEL
), posix
)
194 LIBC_TOP_HALF_MUSL_SOURCES
+= \
195 $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/, \
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 \
256 thread
/sem_timedwait.c \
257 thread
/sem_trywait.c \
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
))
279 # Add any extra flags
280 CFLAGS
= $(EXTRA_CFLAGS
)
282 CFLAGS
+= --target
=$(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 \
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
299 # Configure support for threads.
300 ifeq ($(THREAD_MODEL
), single
)
301 CFLAGS
+= -mthread-model single
303 ifeq ($(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
308 # Include cloudlib's directory to access the structure definition of clockid_t
309 CFLAGS
+= -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)
312 # Expose the public headers to the implementation. We use `-isystem` for
313 # purpose for two reasons:
315 # 1. It only does `<...>` not `"...."` lookup. We are making a libc,
316 # which is a system library, so all public headers should be
317 # accessible via `<...>` and never also need `"..."`. `-isystem` main
318 # purpose is to only effect `<...>` lookup.
320 # 2. The `-I` for private headers added for specific C files below
321 # should come earlier in the search path, so they can "override"
322 # and/or `#include_next` the public headers. `-isystem` (like
323 # `-idirafter`) comes later in the search path than `-I`.
324 CFLAGS
+= -isystem
"$(SYSROOT_INC)"
326 # These variables describe the locations of various files and directories in
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.
340 $(error unknown malloc implementation
$(MALLOC_IMPL
))
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
)
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
))
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
)
364 # Files from musl's include directory that we don't want to install in the
365 # sysroot's include directory.
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" \
374 # Use the compiler's version of these headers.
375 MUSL_OMIT_HEADERS
+= \
379 # Use the WASI errno definitions.
380 MUSL_OMIT_HEADERS
+= \
383 # Remove headers that aren't supported yet or that aren't relevant for WASI.
384 MUSL_OMIT_HEADERS
+= \
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" \
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" \
395 "syslog.h" "sys/syslog.h" \
396 "wait.h" "sys/wait.h" \
397 "ucontext.h" "sys/ucontext.h" \
403 "sys/epoll.h" "sys/reboot.h" "sys/swap.h" \
404 "sys/sendfile.h" "sys/inotify.h" \
413 "sys/personality.h" \
414 "elf.h" "link.h" "bits/link.h" \
415 "scsi/scsi.h" "scsi/scsi_ioctl.h" "scsi/sg.h" \
417 "pwd.h" "shadow.h" "grp.h" \
437 "netinet/if_ether.h" \
444 ifeq ($(THREAD_MODEL
), single
)
445 # Remove headers not supported in single-threaded mode.
446 MUSL_OMIT_HEADERS
+= "pthread.h"
451 $(SYSROOT_LIB
)/libc.a
: $(LIBC_OBJS
)
453 $(SYSROOT_LIB
)/libc-printscan-long-double.a
: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
)
455 $(SYSROOT_LIB
)/libc-printscan-no-floating-point.a
: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
)
457 $(SYSROOT_LIB
)/libwasi-emulated-mman.a
: $(LIBWASI_EMULATED_MMAN_OBJS
)
459 $(SYSROOT_LIB
)/libwasi-emulated-process-clocks.a
: $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
)
461 $(SYSROOT_LIB
)/libwasi-emulated-getpid.a
: $(LIBWASI_EMULATED_GETPID_OBJS
)
463 $(SYSROOT_LIB
)/libwasi-emulated-signal.a
: $(LIBWASI_EMULATED_SIGNAL_OBJS
) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
)
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, $^
)
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\""
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\""
484 # TODO: apply -mbulk-memory globally, once
485 # https://github.com/llvm/llvm-project/issues/52618 is resolved
486 $(BULK_MEMORY_OBJS
): CFLAGS
+= \
489 $(BULK_MEMORY_OBJS
): CFLAGS
+= \
490 -DBULK_MEMORY_THRESHOLD
=$(BULK_MEMORY_THRESHOLD
)
492 $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
): CFLAGS
+= \
493 -D_WASI_EMULATED_SIGNAL
495 $(OBJDIR
)/%.long-double.o
: $(CURDIR
)/%.c include_dirs
497 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
499 $(OBJDIR
)/%.no-floating-point.o
: $(CURDIR
)/%.c include_dirs
501 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
503 $(OBJDIR
)/%.o
: $(CURDIR
)/%.c include_dirs
505 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
507 -include $(shell find
$(OBJDIR
) -name \
*.d
)
509 $(DLMALLOC_OBJS
): CFLAGS
+= \
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
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
) \
526 -Wno-shift-op-parentheses \
527 -Wno-bitwise-op-parentheses \
528 -Wno-logical-op-parentheses \
529 -Wno-string-plus-int \
533 $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
): CFLAGS
+= \
534 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)
538 # Install the include files.
540 mkdir
-p
"$(SYSROOT_INC)"
541 cp
-r
"$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)"
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"
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"
556 # Remove selected header files.
557 $(RM
) $(patsubst %,$(SYSROOT_INC
)/%,$(MUSL_OMIT_HEADERS
))
559 startup_files
: include_dirs
561 # Build the startup files.
563 @mkdir
-p
"$(OBJDIR)"
565 $(CC
) $(CFLAGS
) -c
$(LIBC_BOTTOM_HALF_CRT_SOURCES
) -MD
-MP
&& \
566 mkdir
-p
"$(SYSROOT_LIB)" && \
567 mv
*.o
"$(SYSROOT_LIB)"
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
578 finish
: startup_files libc
580 # Create empty placeholder libraries.
582 for name in m rt pthread crypt util xnet resolv dl
; do \
583 $(AR
) crs
"$(SYSROOT_LIB)/lib$${name}.a"; \
587 # The build succeeded! The generated sysroot is in $(SYSROOT).
590 # The check for defined and undefined symbols expects there to be a heap
591 # alloctor (providing malloc, calloc, free, etc). Skip this step if the build
592 # is done without a malloc implementation.
593 ifneq ($(MALLOC_IMPL
),none
)
594 finish
: check-symbols
597 DEFINED_SYMBOLS
= $(SYSROOT_SHARE
)/defined-symbols.txt
598 UNDEFINED_SYMBOLS
= $(SYSROOT_SHARE
)/undefined-symbols.txt
600 check-symbols
: startup_files libc
602 # Collect metadata on the sysroot and perform sanity checks.
604 mkdir
-p
"$(SYSROOT_SHARE)"
607 # Collect symbol information.
609 @
# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on
610 @
# LLVM PR40497, which is fixed in 9.0, but not in 8.0.
611 @
# Ignore certain llvm builtin symbols such as those starting with __mul
612 @
# since these dependencies can vary between llvm versions.
613 "$(NM)" --defined-only
"$(SYSROOT_LIB)"/libc.a
"$(SYSROOT_LIB)"/libwasi-emulated-
*.a
"$(SYSROOT_LIB)"/*.o \
614 |grep
' [[:upper:]] ' |sed
's/.* [[:upper:]] //' |LC_ALL
=C
sort |uniq
> "$(DEFINED_SYMBOLS)"
615 for undef_sym in
$$("$(NM)" --undefined-only
"$(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 > "$(SYSROOT_LIB)/libc.imports"
623 # Generate a test file that includes all public C header files.
625 cd
"$(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
; \
632 # Test that it compiles.
634 $(CC
) $(CFLAGS
) -fsyntax-only
"$(SYSROOT_SHARE)/include-all.c" -Wno-\
#warnings
637 # Collect all the predefined macros, except for compiler version macros
638 # which we don't need to track here.
641 @
# For the __*_ATOMIC_*_LOCK_FREE macros, squash individual compiler names
642 @
# to attempt, toward keeping these files compiler-independent.
644 @
# We have to add `-isystem $(SYSROOT_INC)` because otherwise clang puts
645 @
# its builtin include path first, which produces compiler-specific
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 @
# TODO: Undefine __wasm_mutable_globals__ and __wasm_sign_ext__, that are new to
654 @
# clang 16 for -mcpu=generic.
655 @
# TODO: As of clang 16, __GNUC_VA_LIST is #defined without a value.
656 $(CC
) $(CFLAGS
) "$(SYSROOT_SHARE)/include-all.c" \
657 -isystem
$(SYSROOT_INC
) \
659 -E
-dM
-Wno-\
#warnings \
665 -U__clang_patchlevel__ \
666 -U__clang_version__ \
667 -U__clang_literal_encoding__ \
668 -U__clang_wide_literal_encoding__ \
669 -U__wasm_mutable_globals__ \
670 -U__wasm_sign_ext__ \
673 -U__GNUC_PATCHLEVEL__ \
676 -U__NO_MATH_ERRNO__ \
677 -U__BITINT_MAXWIDTH__ \
678 -U__FLT_EVAL_METHOD__
-Wno-builtin-macro-redefined \
679 | sed
-e
's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \
680 | sed
-e
's/__GNUC_VA_LIST $$/__GNUC_VA_LIST 1/' \
681 | grep
-v
'^#define __FLT16_' \
682 | grep
-v
'^#define __\(BOOL\|INT_\(LEAST\|FAST\)\(8\|16\|32\|64\)\|INT\|LONG\|LLONG\|SHRT\)_WIDTH__' \
683 > "$(SYSROOT_SHARE)/predefined-macros.txt"
685 # Check that the computed metadata matches the expected metadata.
686 # This ignores whitespace because on Windows the output has CRLF line endings.
687 diff
-wur
"$(CURDIR)/expected/$(MULTIARCH_TRIPLE)/$(THREAD_MODEL)" "$(SYSROOT_SHARE)"
690 mkdir
-p
"$(INSTALL_DIR)"
691 cp
-r
"$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)"
695 $(RM
) -r
"$(SYSROOT)"
697 .PHONY
: default startup_files libc finish
install include_dirs
clean