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 ?
= $(CURDIR
)/build
/$(TARGET_TRIPLE
)
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 default WASI target triple.
36 TARGET_TRIPLE
= wasm32-wasi
38 # Threaded version necessitates a different traget, as objects from different
39 # targets can't be mixed together while linking.
40 ifeq ($(THREAD_MODEL
), posix
)
41 TARGET_TRIPLE
= wasm32-wasi-threads
44 # These variables describe the locations of various files and directories in
46 DLMALLOC_DIR
= $(CURDIR
)/dlmalloc
47 DLMALLOC_SRC_DIR
= $(DLMALLOC_DIR
)/src
48 DLMALLOC_SOURCES
= $(DLMALLOC_SRC_DIR
)/dlmalloc.c
49 DLMALLOC_INC
= $(DLMALLOC_DIR
)/include
50 EMMALLOC_DIR
= $(CURDIR
)/emmalloc
51 EMMALLOC_SOURCES
= $(EMMALLOC_DIR
)/emmalloc.c
52 LIBC_BOTTOM_HALF_DIR
= $(CURDIR
)/libc-bottom-half
53 LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
= $(LIBC_BOTTOM_HALF_DIR
)/cloudlibc
/src
54 LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC
= $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)/include
55 LIBC_BOTTOM_HALF_HEADERS_PUBLIC
= $(LIBC_BOTTOM_HALF_DIR
)/headers
/public
56 LIBC_BOTTOM_HALF_HEADERS_PRIVATE
= $(LIBC_BOTTOM_HALF_DIR
)/headers
/private
57 LIBC_BOTTOM_HALF_SOURCES
= $(LIBC_BOTTOM_HALF_DIR
)/sources
58 LIBC_BOTTOM_HALF_ALL_SOURCES
= \
60 $(shell find
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
) -name \
*.c
) \
61 $(shell find
$(LIBC_BOTTOM_HALF_SOURCES
) -name \
*.c
))
63 # FIXME(https://reviews.llvm.org/D85567) - due to a bug in LLD the weak
64 # references to a function defined in `chdir.c` only work if `chdir.c` is at the
65 # end of the archive, but once that LLD review lands and propagates into LLVM
66 # then we don't have to do this.
67 LIBC_BOTTOM_HALF_ALL_SOURCES
:= $(filter-out $(LIBC_BOTTOM_HALF_SOURCES
)/chdir.c
,$(LIBC_BOTTOM_HALF_ALL_SOURCES
))
68 LIBC_BOTTOM_HALF_ALL_SOURCES
:= $(LIBC_BOTTOM_HALF_ALL_SOURCES
) $(LIBC_BOTTOM_HALF_SOURCES
)/chdir.c
70 LIBWASI_EMULATED_MMAN_SOURCES
= \
71 $(sort $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/mman
-name \
*.c
))
72 LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES
= \
73 $(sort $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/clocks
-name \
*.c
))
74 LIBWASI_EMULATED_GETPID_SOURCES
= \
75 $(sort $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/getpid
-name \
*.c
))
76 LIBWASI_EMULATED_SIGNAL_SOURCES
= \
77 $(sort $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/signal
-name \
*.c
))
78 LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES
= \
79 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/signal
/psignal.c \
80 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/strsignal.c
81 LIBC_BOTTOM_HALF_CRT_SOURCES
= $(wildcard $(LIBC_BOTTOM_HALF_DIR
)/crt
/*.c
)
82 LIBC_TOP_HALF_DIR
= $(CURDIR
)/libc-top-half
83 LIBC_TOP_HALF_MUSL_DIR
= $(LIBC_TOP_HALF_DIR
)/musl
84 LIBC_TOP_HALF_MUSL_SRC_DIR
= $(LIBC_TOP_HALF_MUSL_DIR
)/src
85 LIBC_TOP_HALF_MUSL_INC
= $(LIBC_TOP_HALF_MUSL_DIR
)/include
86 LIBC_TOP_HALF_MUSL_SOURCES
= \
87 $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/, \
95 misc
/getdomainname.c \
107 network
/inet_ntop.c \
108 network
/inet_pton.c \
109 network
/inet_aton.c \
110 network
/in6addr_any.c \
111 network
/in6addr_loopback.c \
115 fenv
/fesetexceptflag.c \
116 fenv
/fegetexceptflag.c \
117 fenv
/feholdexcept.c \
122 exit
/at_quick_exit.c \
135 time
/timespec_get.c \
140 time
/__tm_to_secs.c \
141 time
/__month_to_secs.c \
142 time
/__secs_to_tm.c \
143 time
/__year_to_secs.c \
147 dirent
/versionsort.c \
148 env
/__stack_chk_fail.c \
154 unistd
/posix_close.c \
156 legacy
/getpagesize.c \
157 thread
/thrd_sleep.c \
159 $(filter-out %/procfdname.c
%/syscall.c
%/syscall_ret.c
%/vdso.c
%/version.c
, \
160 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal
/*.c
)) \
161 $(filter-out %/flockfile.c
%/funlockfile.c
%/__lockfile.c
%/ftrylockfile.c \
163 %/tmpnam.c
%/tmpfile.c
%/tempnam.c \
164 %/popen.c
%/pclose.c \
167 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/*.c
)) \
168 $(filter-out %/strsignal.c
, \
169 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/*.c
)) \
170 $(filter-out %/dcngettext.c
%/textdomain.c
%/bind_textdomain_codeset.c
, \
171 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/locale
/*.c
)) \
172 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/*.c
) \
173 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/search
/*.c
) \
174 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/multibyte
/*.c
) \
175 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/regex
/*.c
) \
176 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/prng
/*.c
) \
177 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/conf
/*.c
) \
178 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/ctype
/*.c
) \
179 $(filter-out %/__signbit.c
%/__signbitf.c
%/__signbitl.c \
180 %/__fpclassify.c
%/__fpclassifyf.c
%/__fpclassifyl.c \
182 %/floorf.c
%/floor.c \
183 %/truncf.c
%/trunc.c \
185 %/nearbyintf.c
%/nearbyint.c \
188 %/copysignf.c
%/copysign.c \
189 %/fminf.c
%/fmaxf.c \
191 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/math
/*.c
)) \
192 $(filter-out %/crealf.c
%/creal.c
%creall.c \
193 %/cimagf.c
%/cimag.c
%cimagl.c
, \
194 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/complex
/*.c
)) \
195 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/crypt
/*.c
)
197 ifeq ($(THREAD_MODEL
), posix
)
198 LIBC_TOP_HALF_MUSL_SOURCES
+= \
199 $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/, \
203 stdio
/ftrylockfile.c \
204 stdio
/funlockfile.c \
207 thread
/__timedwait.c \
208 thread
/default_attr.c \
209 thread
/pthread_attr_destroy.c \
210 thread
/pthread_attr_get.c \
211 thread
/pthread_attr_init.c \
212 thread
/pthread_attr_setstack.c \
213 thread
/pthread_attr_setdetachstate.c \
214 thread
/pthread_attr_setstacksize.c \
215 thread
/pthread_barrier_destroy.c \
216 thread
/pthread_barrier_init.c \
217 thread
/pthread_barrier_wait.c \
218 thread
/pthread_cleanup_push.c \
219 thread
/pthread_cond_broadcast.c \
220 thread
/pthread_cond_destroy.c \
221 thread
/pthread_cond_init.c \
222 thread
/pthread_cond_signal.c \
223 thread
/pthread_cond_timedwait.c \
224 thread
/pthread_cond_wait.c \
225 thread
/pthread_condattr_destroy.c \
226 thread
/pthread_condattr_init.c \
227 thread
/pthread_condattr_setclock.c \
228 thread
/pthread_condattr_setpshared.c \
229 thread
/pthread_create.c \
230 thread
/pthread_detach.c \
231 thread
/pthread_equal.c \
232 thread
/pthread_getspecific.c \
233 thread
/pthread_join.c \
234 thread
/pthread_key_create.c \
235 thread
/pthread_mutex_consistent.c \
236 thread
/pthread_mutex_destroy.c \
237 thread
/pthread_mutex_init.c \
238 thread
/pthread_mutex_getprioceiling.c \
239 thread
/pthread_mutex_lock.c \
240 thread
/pthread_mutex_timedlock.c \
241 thread
/pthread_mutex_trylock.c \
242 thread
/pthread_mutex_unlock.c \
243 thread
/pthread_mutexattr_destroy.c \
244 thread
/pthread_mutexattr_init.c \
245 thread
/pthread_mutexattr_setprotocol.c \
246 thread
/pthread_mutexattr_setpshared.c \
247 thread
/pthread_mutexattr_setrobust.c \
248 thread
/pthread_mutexattr_settype.c \
249 thread
/pthread_once.c \
250 thread
/pthread_rwlock_destroy.c \
251 thread
/pthread_rwlock_init.c \
252 thread
/pthread_rwlock_rdlock.c \
253 thread
/pthread_rwlock_timedrdlock.c \
254 thread
/pthread_rwlock_timedwrlock.c \
255 thread
/pthread_rwlock_tryrdlock.c \
256 thread
/pthread_rwlock_trywrlock.c \
257 thread
/pthread_rwlock_unlock.c \
258 thread
/pthread_rwlock_wrlock.c \
259 thread
/pthread_rwlockattr_destroy.c \
260 thread
/pthread_rwlockattr_init.c \
261 thread
/pthread_rwlockattr_setpshared.c \
262 thread
/pthread_setcancelstate.c \
263 thread
/pthread_setspecific.c \
264 thread
/pthread_self.c \
265 thread
/pthread_testcancel.c \
266 thread
/sem_destroy.c \
267 thread
/sem_getvalue.c \
270 thread
/sem_timedwait.c \
271 thread
/sem_trywait.c \
273 thread
/wasm32
/wasi_thread_start.s \
277 MUSL_PRINTSCAN_SOURCES
= \
278 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal
/floatscan.c \
279 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfprintf.c \
280 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfwprintf.c \
281 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfscanf.c \
282 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/strtod.c \
283 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/wcstod.c
284 BULK_MEMORY_SOURCES
= \
285 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/memcpy.c \
286 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/memmove.c \
287 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/memset.c
288 LIBC_TOP_HALF_HEADERS_PRIVATE
= $(LIBC_TOP_HALF_DIR
)/headers
/private
289 LIBC_TOP_HALF_SOURCES
= $(LIBC_TOP_HALF_DIR
)/sources
290 LIBC_TOP_HALF_ALL_SOURCES
= \
291 $(LIBC_TOP_HALF_MUSL_SOURCES
) \
292 $(sort $(shell find
$(LIBC_TOP_HALF_SOURCES
) -name \
*.
[cs
]))
294 # Add any extra flags
295 CFLAGS
= $(EXTRA_CFLAGS
)
297 CFLAGS
+= --target
=$(TARGET_TRIPLE
)
298 ASMFLAGS
+= --target
=$(TARGET_TRIPLE
)
299 # WebAssembly floating-point match doesn't trap.
300 # TODO: Add -fno-signaling-nans when the compiler supports it.
301 CFLAGS
+= -fno-trapping-math
302 # Add all warnings, but disable a few which occur in third-party code.
303 CFLAGS
+= -Wall
-Wextra
-Werror \
304 -Wno-null-pointer-arithmetic \
305 -Wno-unused-parameter \
307 -Wno-unused-variable \
308 -Wno-unused-function \
309 -Wno-ignored-attributes \
310 -Wno-missing-braces \
311 -Wno-ignored-pragmas \
312 -Wno-unused-but-set-variable \
313 -Wno-unknown-warning-option
315 # Configure support for threads.
316 ifeq ($(THREAD_MODEL
), single
)
317 CFLAGS
+= -mthread-model single
319 ifeq ($(THREAD_MODEL
), posix
)
320 # Specify the tls-model until LLVM 15 is released (which should contain
321 # https://reviews.llvm.org/D130053).
322 CFLAGS
+= -mthread-model posix
-pthread
-ftls-model
=local-exec
324 # Include cloudlib's directory to access the structure definition of clockid_t
325 CFLAGS
+= -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)
328 # Expose the public headers to the implementation. We use `-isystem` for
329 # purpose for two reasons:
331 # 1. It only does `<...>` not `"...."` lookup. We are making a libc,
332 # which is a system library, so all public headers should be
333 # accessible via `<...>` and never also need `"..."`. `-isystem` main
334 # purpose is to only effect `<...>` lookup.
336 # 2. The `-I` for private headers added for specific C files below
337 # should come earlier in the search path, so they can "override"
338 # and/or `#include_next` the public headers. `-isystem` (like
339 # `-idirafter`) comes later in the search path than `-I`.
340 CFLAGS
+= -isystem
"$(SYSROOT_INC)"
342 # These variables describe the locations of various files and directories in
344 objs
= $(patsubst $(CURDIR
)/%.c
,$(OBJDIR
)/%.o
,$(1))
345 asmobjs
= $(patsubst $(CURDIR
)/%.s
,$(OBJDIR
)/%.o
,$(1))
346 DLMALLOC_OBJS
= $(call objs
,$(DLMALLOC_SOURCES
))
347 EMMALLOC_OBJS
= $(call objs
,$(EMMALLOC_SOURCES
))
348 LIBC_BOTTOM_HALF_ALL_OBJS
= $(call objs
,$(LIBC_BOTTOM_HALF_ALL_SOURCES
))
349 LIBC_TOP_HALF_ALL_OBJS
= $(call asmobjs
,$(call objs
,$(LIBC_TOP_HALF_ALL_SOURCES
)))
350 ifeq ($(MALLOC_IMPL
),dlmalloc
)
351 LIBC_OBJS
+= $(DLMALLOC_OBJS
)
352 else ifeq ($(MALLOC_IMPL
),emmalloc
)
353 LIBC_OBJS
+= $(EMMALLOC_OBJS
)
354 else ifeq ($(MALLOC_IMPL
),none
)
355 # No object files to add.
357 $(error unknown malloc implementation
$(MALLOC_IMPL
))
359 # Add libc-bottom-half's objects.
360 LIBC_OBJS
+= $(LIBC_BOTTOM_HALF_ALL_OBJS
)
361 ifeq ($(BUILD_LIBC_TOP_HALF
),yes
)
362 # libc-top-half is musl.
363 LIBC_OBJS
+= $(LIBC_TOP_HALF_ALL_OBJS
)
365 MUSL_PRINTSCAN_OBJS
= $(call objs
,$(MUSL_PRINTSCAN_SOURCES
))
366 MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
= $(patsubst %.o
,%.long-double.o
,$(MUSL_PRINTSCAN_OBJS
))
367 MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
= $(patsubst %.o
,%.no-floating-point.o
,$(MUSL_PRINTSCAN_OBJS
))
368 BULK_MEMORY_OBJS
= $(call objs
,$(BULK_MEMORY_SOURCES
))
369 LIBWASI_EMULATED_MMAN_OBJS
= $(call objs
,$(LIBWASI_EMULATED_MMAN_SOURCES
))
370 LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
= $(call objs
,$(LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES
))
371 LIBWASI_EMULATED_GETPID_OBJS
= $(call objs
,$(LIBWASI_EMULATED_GETPID_SOURCES
))
372 LIBWASI_EMULATED_SIGNAL_OBJS
= $(call objs
,$(LIBWASI_EMULATED_SIGNAL_SOURCES
))
373 LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
= $(call objs
,$(LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES
))
375 # These variables describe the locations of various files and
376 # directories in the generated sysroot tree.
377 SYSROOT_LIB
:= $(SYSROOT
)/lib
/$(TARGET_TRIPLE
)
378 SYSROOT_INC
= $(SYSROOT
)/include
379 SYSROOT_SHARE
= $(SYSROOT
)/share
/$(TARGET_TRIPLE
)
381 # Files from musl's include directory that we don't want to install in the
382 # sysroot's include directory.
385 # Remove files which aren't headers (we generate alltypes.h below).
386 MUSL_OMIT_HEADERS
+= \
387 "bits/syscall.h.in" \
388 "bits/alltypes.h.in" \
391 # Use the compiler's version of these headers.
392 MUSL_OMIT_HEADERS
+= \
396 # Use the WASI errno definitions.
397 MUSL_OMIT_HEADERS
+= \
400 # Remove headers that aren't supported yet or that aren't relevant for WASI.
401 MUSL_OMIT_HEADERS
+= \
404 "sys/kd.h" "sys/vt.h" "sys/soundcard.h" "sys/sem.h" \
405 "sys/shm.h" "sys/msg.h" "sys/ipc.h" "sys/ptrace.h" \
407 "bits/kd.h" "bits/vt.h" "bits/soundcard.h" "bits/sem.h" \
408 "bits/shm.h" "bits/msg.h" "bits/ipc.h" "bits/ptrace.h" \
412 "syslog.h" "sys/syslog.h" \
413 "wait.h" "sys/wait.h" \
414 "ucontext.h" "sys/ucontext.h" \
420 "sys/epoll.h" "sys/reboot.h" "sys/swap.h" \
421 "sys/sendfile.h" "sys/inotify.h" \
430 "sys/personality.h" \
431 "elf.h" "link.h" "bits/link.h" \
432 "scsi/scsi.h" "scsi/scsi_ioctl.h" "scsi/sg.h" \
434 "pwd.h" "shadow.h" "grp.h" \
454 "netinet/if_ether.h" \
461 ifeq ($(THREAD_MODEL
), single
)
462 # Remove headers not supported in single-threaded mode.
463 MUSL_OMIT_HEADERS
+= "pthread.h"
468 $(SYSROOT_LIB
)/libc.a
: $(LIBC_OBJS
)
470 $(SYSROOT_LIB
)/libc-printscan-long-double.a
: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
)
472 $(SYSROOT_LIB
)/libc-printscan-no-floating-point.a
: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
)
474 $(SYSROOT_LIB
)/libwasi-emulated-mman.a
: $(LIBWASI_EMULATED_MMAN_OBJS
)
476 $(SYSROOT_LIB
)/libwasi-emulated-process-clocks.a
: $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
)
478 $(SYSROOT_LIB
)/libwasi-emulated-getpid.a
: $(LIBWASI_EMULATED_GETPID_OBJS
)
480 $(SYSROOT_LIB
)/libwasi-emulated-signal.a
: $(LIBWASI_EMULATED_SIGNAL_OBJS
) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
)
484 # On Windows, the commandline for the ar invocation got too long, so it needs to be split up.
485 $(AR
) crs
$@
$(wordlist
1, 199, $^
)
486 $(AR
) crs
$@
$(wordlist
200, 399, $^
)
487 $(AR
) crs
$@
$(wordlist
400, 599, $^
)
488 $(AR
) crs
$@
$(wordlist
600, 799, $^
)
489 # This might eventually overflow again, but at least it'll do so in a loud way instead of
490 # silently dropping the tail.
491 $(AR
) crs
$@
$(wordlist
800, 100000, $^
)
493 $(MUSL_PRINTSCAN_OBJS
): CFLAGS
+= \
494 -D__wasilibc_printscan_no_long_double \
495 -D__wasilibc_printscan_full_support_option
="\"add -lc-printscan-long-double to the link command\""
497 $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
): CFLAGS
+= \
498 -D__wasilibc_printscan_no_floating_point \
499 -D__wasilibc_printscan_floating_point_support_option
="\"remove -lc-printscan-no-floating-point from the link command\""
501 # TODO: apply -mbulk-memory globally, once
502 # https://github.com/llvm/llvm-project/issues/52618 is resolved
503 $(BULK_MEMORY_OBJS
): CFLAGS
+= \
506 $(BULK_MEMORY_OBJS
): CFLAGS
+= \
507 -DBULK_MEMORY_THRESHOLD
=$(BULK_MEMORY_THRESHOLD
)
509 $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
): CFLAGS
+= \
510 -D_WASI_EMULATED_SIGNAL
512 $(OBJDIR
)/%.long-double.o
: $(CURDIR
)/%.c include_dirs
514 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
516 $(OBJDIR
)/%.no-floating-point.o
: $(CURDIR
)/%.c include_dirs
518 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
520 $(OBJDIR
)/%.o
: $(CURDIR
)/%.c include_dirs
522 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
524 $(OBJDIR
)/%.o
: $(CURDIR
)/%.s include_dirs
526 $(CC
) $(ASMFLAGS
) -o
$@
-c
$<
528 -include $(shell find
$(OBJDIR
) -name \
*.d
)
530 $(DLMALLOC_OBJS
): CFLAGS
+= \
533 startup_files
$(LIBC_BOTTOM_HALF_ALL_OBJS
): CFLAGS
+= \
534 -I
$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE
) \
535 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC
) \
536 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
) \
537 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/include \
538 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal
540 $(LIBC_TOP_HALF_ALL_OBJS
) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
): CFLAGS
+= \
541 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/include \
542 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal \
543 -I
$(LIBC_TOP_HALF_MUSL_DIR
)/arch
/wasm32 \
544 -I
$(LIBC_TOP_HALF_MUSL_DIR
)/arch
/generic \
545 -I
$(LIBC_TOP_HALF_HEADERS_PRIVATE
) \
547 -Wno-shift-op-parentheses \
548 -Wno-bitwise-op-parentheses \
549 -Wno-logical-op-parentheses \
550 -Wno-string-plus-int \
554 $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
): CFLAGS
+= \
555 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)
559 # Install the include files.
561 mkdir
-p
"$(SYSROOT_INC)"
562 cp
-r
"$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)"
564 # Generate musl's bits/alltypes.h header.
565 mkdir
-p
"$(SYSROOT_INC)/bits"
566 sed
-f
$(LIBC_TOP_HALF_MUSL_DIR
)/tools
/mkalltypes.sed \
567 $(LIBC_TOP_HALF_MUSL_DIR
)/arch
/wasm32
/bits
/alltypes.h.in \
568 $(LIBC_TOP_HALF_MUSL_DIR
)/include/alltypes.h.in \
569 > "$(SYSROOT_INC)/bits/alltypes.h"
571 # Copy in the bulk of musl's public header files.
572 cp
-r
"$(LIBC_TOP_HALF_MUSL_INC)"/* "$(SYSROOT_INC)"
573 # Copy in the musl's "bits" header files.
574 cp
-r
"$(LIBC_TOP_HALF_MUSL_DIR)"/arch
/generic
/bits
/* "$(SYSROOT_INC)/bits"
575 cp
-r
"$(LIBC_TOP_HALF_MUSL_DIR)"/arch
/wasm32
/bits
/* "$(SYSROOT_INC)/bits"
577 # Remove selected header files.
578 $(RM
) $(patsubst %,$(SYSROOT_INC
)/%,$(MUSL_OMIT_HEADERS
))
580 startup_files
: include_dirs
582 # Build the startup files.
584 @mkdir
-p
"$(OBJDIR)"
586 $(CC
) $(CFLAGS
) -c
$(LIBC_BOTTOM_HALF_CRT_SOURCES
) -MD
-MP
&& \
587 mkdir
-p
"$(SYSROOT_LIB)" && \
588 mv
*.o
"$(SYSROOT_LIB)"
591 $(SYSROOT_LIB
)/libc.a \
592 $(SYSROOT_LIB
)/libc-printscan-long-double.a \
593 $(SYSROOT_LIB
)/libc-printscan-no-floating-point.a \
594 $(SYSROOT_LIB
)/libwasi-emulated-mman.a \
595 $(SYSROOT_LIB
)/libwasi-emulated-process-clocks.a \
596 $(SYSROOT_LIB
)/libwasi-emulated-getpid.a \
597 $(SYSROOT_LIB
)/libwasi-emulated-signal.a
599 finish
: startup_files libc
601 # Create empty placeholder libraries.
603 for name in m rt pthread crypt util xnet resolv dl
; do \
604 $(AR
) crs
"$(SYSROOT_LIB)/lib$${name}.a"; \
608 # The build succeeded! The generated sysroot is in $(SYSROOT).
611 # The check for defined and undefined symbols expects there to be a heap
612 # alloctor (providing malloc, calloc, free, etc). Skip this step if the build
613 # is done without a malloc implementation.
614 ifneq ($(MALLOC_IMPL
),none
)
615 finish
: check-symbols
618 DEFINED_SYMBOLS
= $(SYSROOT_SHARE
)/defined-symbols.txt
619 UNDEFINED_SYMBOLS
= $(SYSROOT_SHARE
)/undefined-symbols.txt
621 check-symbols
: startup_files libc
623 # Collect metadata on the sysroot and perform sanity checks.
625 mkdir
-p
"$(SYSROOT_SHARE)"
628 # Collect symbol information.
630 @
# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on
631 @
# LLVM PR40497, which is fixed in 9.0, but not in 8.0.
632 @
# Ignore certain llvm builtin symbols such as those starting with __mul
633 @
# since these dependencies can vary between llvm versions.
634 "$(NM)" --defined-only
"$(SYSROOT_LIB)"/libc.a
"$(SYSROOT_LIB)"/libwasi-emulated-
*.a
"$(SYSROOT_LIB)"/*.o \
635 |grep
' [[:upper:]] ' |sed
's/.* [[:upper:]] //' |LC_ALL
=C
sort |uniq
> "$(DEFINED_SYMBOLS)"
636 for undef_sym in
$$("$(NM)" --undefined-only
"$(SYSROOT_LIB)"/libc.a
"$(SYSROOT_LIB)"/libc-
*.a
"$(SYSROOT_LIB)"/*.o \
637 |grep
' U ' |sed
's/.* U //' |LC_ALL
=C
sort |uniq
); do \
638 grep
-q
'\<'$$undef_sym'\>' "$(DEFINED_SYMBOLS)" || echo
$$undef_sym; \
639 done | grep
-v
"^__mul" > "$(UNDEFINED_SYMBOLS)"
640 grep
'^_*imported_wasi_' "$(UNDEFINED_SYMBOLS)" \
641 > "$(SYSROOT_LIB)/libc.imports"
644 # Generate a test file that includes all public C header files.
646 cd
"$(SYSROOT_INC)" && \
647 for header in
$$(find .
-type f
-not
-name mman.h
-not
-name signal.h
-not
-name times.h
-not
-name resource.h |grep
-v
/bits
/ |grep
-v
/c
++/); do \
648 echo
'#include <'$$header'>' | sed
's/\.\///' ; \
649 done |LC_ALL
=C
sort >$(SYSROOT_SHARE
)/include-all.c
; \
653 # Test that it compiles.
655 $(CC
) $(CFLAGS
) -fsyntax-only
"$(SYSROOT_SHARE)/include-all.c" -Wno-\
#warnings
658 # Collect all the predefined macros, except for compiler version macros
659 # which we don't need to track here.
662 @
# For the __*_ATOMIC_*_LOCK_FREE macros, squash individual compiler names
663 @
# to attempt, toward keeping these files compiler-independent.
665 @
# We have to add `-isystem $(SYSROOT_INC)` because otherwise clang puts
666 @
# its builtin include path first, which produces compiler-specific
669 @
# TODO: Filter out __NO_MATH_ERRNO_ and a few __*WIDTH__ that are new to clang 14.
670 @
# TODO: Filter out __GCC_HAVE_SYNC_COMPARE_AND_SWAP_* that are new to clang 16.
671 @
# TODO: clang defined __FLT_EVAL_METHOD__ until clang 15, so we force-undefine it
672 @
# for older versions.
673 @
# TODO: Undefine __wasm_mutable_globals__ and __wasm_sign_ext__, that are new to
674 @
# clang 16 for -mcpu=generic.
675 @
# TODO: As of clang 16, __GNUC_VA_LIST is #defined without a value.
676 $(CC
) $(CFLAGS
) "$(SYSROOT_SHARE)/include-all.c" \
677 -isystem
$(SYSROOT_INC
) \
679 -E
-dM
-Wno-\
#warnings \
685 -U__clang_patchlevel__ \
686 -U__clang_version__ \
687 -U__clang_literal_encoding__ \
688 -U__clang_wide_literal_encoding__ \
689 -U__wasm_mutable_globals__ \
690 -U__wasm_sign_ext__ \
693 -U__GNUC_PATCHLEVEL__ \
695 -U__NO_MATH_ERRNO__ \
696 -U__BITINT_MAXWIDTH__ \
697 -U__FLT_EVAL_METHOD__
-Wno-builtin-macro-redefined \
698 | sed
-e
's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \
699 | sed
-e
's/__GNUC_VA_LIST $$/__GNUC_VA_LIST 1/' \
700 | grep
-v
'^#define __\(BOOL\|INT_\(LEAST\|FAST\)\(8\|16\|32\|64\)\|INT\|LONG\|LLONG\|SHRT\)_WIDTH__' \
701 | grep
-v
'^#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_\(1\|2\|4\|8\)' \
702 > "$(SYSROOT_SHARE)/predefined-macros.txt"
704 # Check that the computed metadata matches the expected metadata.
705 # This ignores whitespace because on Windows the output has CRLF line endings.
706 diff
-wur
"$(CURDIR)/expected/$(TARGET_TRIPLE)" "$(SYSROOT_SHARE)"
709 mkdir
-p
"$(INSTALL_DIR)"
710 cp
-r
"$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)"
714 $(RM
) -r
"$(SYSROOT)"
716 .PHONY
: default startup_files libc finish
install include_dirs
clean