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Lazy-initialize the environment variables. (#184)
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1# These variables are specifically meant to be overridable via
2# the make command-line.
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3WASM_CC ?= clang
4WASM_NM ?= $(patsubst %clang,%llvm-nm,$(WASM_CC))
5WASM_AR ?= $(patsubst %clang,%llvm-ar,$(WASM_CC))
7fcc4f29 6WASM_CFLAGS ?= -O2 -DNDEBUG
320054e8 7# The directory where we build the sysroot.
255e6f7c 8SYSROOT ?= $(CURDIR)/sysroot
320054e8 9# A directory to install to for "make install".
255e6f7c 10INSTALL_DIR ?= /usr/local
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11# single or posix
12THREAD_MODEL = single
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13# yes or no
14BUILD_DLMALLOC = yes
15BUILD_LIBC_BOTTOM_HALF = yes
16BUILD_LIBC_TOP_HALF = yes
17# The directory where we're store intermediate artifacts.
18OBJDIR = $(CURDIR)/build
19
20# Check dependencies.
21ifeq ($(BUILD_LIBC_TOP_HALF),yes)
22ifneq ($(BUILD_LIBC_BOTTOM_HALF),yes)
23$(error BUILD_LIBC_TOP_HALF=yes depends on BUILD_LIBC_BOTTOM_HALF=yes)
24endif
25endif
26ifeq ($(BUILD_LIBC_BOTTOM_HALF),yes)
27ifneq ($(BUILD_DLMALLOC),yes)
28$(error BUILD_LIBC_BOTTOM_HALF=yes depends on BUILD_DLMALLOC=yes)
29endif
30endif
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31
32# These variables describe the locations of various files and
33# directories in the source tree.
320054e8 34BASICS_DIR = $(CURDIR)/basics
dbfccac2 35BASICS_INC = $(BASICS_DIR)/include
ad03c82d 36BASICS_CRT_SOURCES = $(wildcard $(BASICS_DIR)/crt/*.c)
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37BASICS_SOURCES = \
38 $(wildcard $(BASICS_DIR)/sources/*.c) \
39 $(wildcard $(BASICS_DIR)/sources/math/*.c)
320054e8 40DLMALLOC_DIR = $(CURDIR)/dlmalloc
dbfccac2 41DLMALLOC_SRC_DIR = $(DLMALLOC_DIR)/src
320054e8 42DLMALLOC_SOURCES = $(DLMALLOC_SRC_DIR)/dlmalloc.c
dbfccac2 43DLMALLOC_INC = $(DLMALLOC_DIR)/include
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44LIBC_BOTTOM_HALF_DIR = $(CURDIR)/libc-bottom-half
45LIBC_BOTTOM_HALF_CLOUDLIBC_SRC = $(LIBC_BOTTOM_HALF_DIR)/cloudlibc/src
46LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC = $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC)/include
47LIBC_BOTTOM_HALF_HEADERS_PUBLIC = $(LIBC_BOTTOM_HALF_DIR)/headers/public
48LIBC_BOTTOM_HALF_HEADERS_PRIVATE = $(LIBC_BOTTOM_HALF_DIR)/headers/private
49LIBC_BOTTOM_HALF_LIBPREOPEN_DIR = $(LIBC_BOTTOM_HALF_DIR)/libpreopen
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50LIBC_BOTTOM_HALF_SOURCES = $(LIBC_BOTTOM_HALF_DIR)/sources
51LIBC_BOTTOM_HALF_ALL_SOURCES = \
52 $(shell find $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) -name \*.c) \
7fcc4f29 53 $(LIBC_BOTTOM_HALF_LIBPREOPEN_DIR)/libpreopen.c \
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54 $(shell find $(LIBC_BOTTOM_HALF_SOURCES) -name \*.c)
55LIBWASI_EMULATED_MMAN_SOURCES = \
56 $(shell find $(LIBC_BOTTOM_HALF_DIR)/mman -name \*.c)
57LIBC_BOTTOM_HALF_CRT_SOURCES = $(wildcard $(LIBC_BOTTOM_HALF_DIR)/crt/*.c)
58LIBC_TOP_HALF_DIR = $(CURDIR)/libc-top-half
59LIBC_TOP_HALF_MUSL_DIR = $(LIBC_TOP_HALF_DIR)/musl
60LIBC_TOP_HALF_MUSL_SRC_DIR = $(LIBC_TOP_HALF_MUSL_DIR)/src
61LIBC_TOP_HALF_MUSL_INC = $(LIBC_TOP_HALF_MUSL_DIR)/include
62LIBC_TOP_HALF_MUSL_SOURCES = \
63 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/a64l.c \
64 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/basename.c \
65 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/dirname.c \
66 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffs.c \
67 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffsl.c \
68 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffsll.c \
69 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/fmtmsg.c \
70 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getdomainname.c \
71 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/gethostid.c \
72 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getopt.c \
73 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getopt_long.c \
74 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getsubopt.c \
75 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/uname.c \
76 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/nftw.c \
77 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/errno/strerror.c \
78 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/htonl.c \
79 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/htons.c \
80 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/ntohl.c \
81 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/ntohs.c \
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82 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/inet_ntop.c \
83 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/inet_pton.c \
84 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/inet_aton.c \
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85 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/in6addr_any.c \
86 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/in6addr_loopback.c \
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87 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fenv.c \
88 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fesetround.c \
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89 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/feupdateenv.c \
90 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fesetexceptflag.c \
91 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fegetexceptflag.c \
92 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/feholdexcept.c \
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93 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/exit.c \
94 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/atexit.c \
95 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/assert.c \
96 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/quick_exit.c \
97 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/at_quick_exit.c \
98 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/strftime.c \
5ce487a7 99 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/asctime.c \
320054e8 100 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/asctime_r.c \
5067fefb 101 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/ctime.c \
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102 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/ctime_r.c \
103 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/wcsftime.c \
104 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/strptime.c \
105 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/difftime.c \
106 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/timegm.c \
107 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/ftime.c \
108 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/gmtime.c \
109 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/gmtime_r.c \
110 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/timespec_get.c \
111 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/getdate.c \
03a1adbf 112 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/localtime.c \
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113 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/localtime_r.c \
114 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/mktime.c \
115 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__tm_to_secs.c \
116 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__month_to_secs.c \
117 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__secs_to_tm.c \
118 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__year_to_secs.c \
119 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__tz.c \
120 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fcntl/creat.c \
121 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/dirent/alphasort.c \
122 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/dirent/versionsort.c \
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123 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/clearenv.c \
124 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/getenv.c \
125 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/putenv.c \
126 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/setenv.c \
127 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/unsetenv.c \
128 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/unistd/posix_close.c \
129 $(filter-out %/procfdname.c %/syscall.c %/syscall_ret.c %/vdso.c %/version.c, \
130 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/*.c)) \
131 $(filter-out %/flockfile.c %/funlockfile.c %/__lockfile.c %/ftrylockfile.c \
132 %/rename.c \
133 %/tmpnam.c %/tmpfile.c %/tempnam.c \
134 %/popen.c %/pclose.c \
135 %/remove.c \
136 %/gets.c, \
137 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/*.c)) \
138 $(filter-out %/strsignal.c, \
139 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/*.c)) \
8048aeb5 140 $(filter-out %/dcngettext.c %/textdomain.c %/bind_textdomain_codeset.c, \
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141 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/locale/*.c)) \
142 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/*.c) \
143 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/search/*.c) \
144 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/multibyte/*.c) \
145 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/regex/*.c) \
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146 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/prng/*.c) \
147 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/conf/*.c) \
148 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/ctype/*.c) \
900b8032 149 $(filter-out %/__signbit.c %/__signbitf.c %/__signbitl.c \
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150 %/__fpclassify.c %/__fpclassifyf.c %/__fpclassifyl.c \
151 %/ceilf.c %/ceil.c \
152 %/floorf.c %/floor.c \
153 %/truncf.c %/trunc.c \
154 %/rintf.c %/rint.c \
155 %/nearbyintf.c %/nearbyint.c \
156 %/sqrtf.c %/sqrt.c \
157 %/fabsf.c %/fabs.c \
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158 %/copysignf.c %/copysign.c \
159 %/fminf.c %/fmaxf.c \
160 %/fmin.c %/fmax.c, \
900b8032 161 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/math/*.c)) \
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162 $(filter-out %/crealf.c %/creal.c \
163 %/cimagf.c %/cimag.c, \
164 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/complex/*.c)) \
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165 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/crypt/*.c)
166MUSL_PRINTSCAN_SOURCES = \
167 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/floatscan.c \
168 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfprintf.c \
2201343c 169 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfwprintf.c \
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170 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfscanf.c \
171 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/strtod.c \
172 $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/wcstod.c
173LIBC_TOP_HALF_HEADERS_PRIVATE = $(LIBC_TOP_HALF_DIR)/headers/private
174LIBC_TOP_HALF_SOURCES = $(LIBC_TOP_HALF_DIR)/sources
175LIBC_TOP_HALF_ALL_SOURCES = \
176 $(LIBC_TOP_HALF_MUSL_SOURCES) \
177 $(shell find $(LIBC_TOP_HALF_SOURCES) -name \*.c)
178
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179# Set the target variables. Multiarch triples notably omit the vendor
180# field, which happens to be what we do for the main target triple too.
181TARGET_TRIPLE = wasm32-wasi
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182MULTIARCH_TRIPLE = wasm32-wasi
183
184# These variables describe the locations of various files and
185# directories in the generated sysroot tree.
186SYSROOT_LIB = $(SYSROOT)/lib/$(MULTIARCH_TRIPLE)
187SYSROOT_INC = $(SYSROOT)/include
188SYSROOT_SHARE = $(SYSROOT)/share/$(MULTIARCH_TRIPLE)
189
190# Set the target.
191override WASM_CFLAGS += --target=$(TARGET_TRIPLE)
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192# WebAssembly floating-point match doesn't trap.
193# TODO: Add -fno-signaling-nans when the compiler supports it.
194override WASM_CFLAGS += -fno-trapping-math
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195
196# Configure support for threads.
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197ifeq ($(THREAD_MODEL), single)
198override WASM_CFLAGS += -mthread-model single
dbfccac2 199endif
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200ifeq ($(THREAD_MODEL), posix)
201override WASM_CFLAGS += -mthread-model posix -pthread
202endif
203
204# Set the sysroot.
205override WASM_CFLAGS += --sysroot="$(SYSROOT)"
206
207objs = $(patsubst $(CURDIR)/%.c,$(OBJDIR)/%.o,$(1))
ad03c82d 208override BASICS_OBJS = $(call objs,$(BASICS_SOURCES))
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209override DLMALLOC_OBJS = $(call objs,$(DLMALLOC_SOURCES))
210override LIBC_BOTTOM_HALF_ALL_OBJS = $(call objs,$(LIBC_BOTTOM_HALF_ALL_SOURCES))
211override LIBC_TOP_HALF_ALL_OBJS = $(call objs,$(LIBC_TOP_HALF_ALL_SOURCES))
ad03c82d 212override LIBC_OBJS := $(BASICS_OBJS)
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213ifeq ($(BUILD_DLMALLOC),yes)
214override LIBC_OBJS += $(DLMALLOC_OBJS)
dbfccac2 215endif
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216ifeq ($(BUILD_LIBC_BOTTOM_HALF),yes)
217# Override basics' string.o with libc-bottom-half's.
218override LIBC_OBJS := $(filter-out %/string.o,$(LIBC_OBJS))
219# Add libc-bottom-half's objects.
220override LIBC_OBJS += $(LIBC_BOTTOM_HALF_ALL_OBJS)
221endif
222ifeq ($(BUILD_LIBC_TOP_HALF),yes)
223# Override libc-bottom-half's string.o with libc-top-half's.
224override LIBC_OBJS := $(filter-out %/string.o,$(LIBC_OBJS))
225# Override libc-bottom-half's qsort.o with libc-top-half's.
226override LIBC_OBJS := $(filter-out %/qsort.o,$(LIBC_OBJS))
227# libc-top-half is musl.
228override LIBC_OBJS += $(LIBC_TOP_HALF_ALL_OBJS)
229endif
230override MUSL_PRINTSCAN_OBJS = $(call objs,$(MUSL_PRINTSCAN_SOURCES))
231override MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS))
232override MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS))
233override LIBWASI_EMULATED_MMAN_OBJS = $(call objs,$(LIBWASI_EMULATED_MMAN_SOURCES))
234
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235# Files from musl's include directory that we don't want to install in the
236# sysroot's include directory.
237override MUSL_OMIT_HEADERS :=
238
239# Remove files which aren't headers (we generate alltypes.h below).
240override MUSL_OMIT_HEADERS += \
241 "bits/syscall.h.in" \
242 "bits/alltypes.h.in" \
243 "alltypes.h.in"
244
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245# Use the compiler's version of these headers.
246override MUSL_OMIT_HEADERS += \
247 "stdarg.h" \
248 "stddef.h"
249
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250# Use the WASI errno definitions.
251override MUSL_OMIT_HEADERS += \
252 "bits/errno.h"
253
254# Remove headers that aren't supported yet or that aren't relevant for WASI.
255override MUSL_OMIT_HEADERS += \
256 "sys/procfs.h" \
257 "sys/user.h" \
258 "sys/kd.h" "sys/vt.h" "sys/soundcard.h" "sys/sem.h" \
259 "sys/shm.h" "sys/msg.h" "sys/ipc.h" "sys/ptrace.h" \
260 "sys/statfs.h" \
261 "bits/kd.h" "bits/vt.h" "bits/soundcard.h" "bits/sem.h" \
262 "bits/shm.h" "bits/msg.h" "bits/ipc.h" "bits/ptrace.h" \
263 "bits/statfs.h" \
264 "sys/vfs.h" \
265 "sys/statvfs.h" \
266 "syslog.h" "sys/syslog.h" \
267 "wait.h" "sys/wait.h" \
268 "ucontext.h" "sys/ucontext.h" \
269 "paths.h" \
270 "utmp.h" "utmpx.h" \
271 "lastlog.h" \
272 "sys/acct.h" \
273 "sys/cachectl.h" \
274 "sys/epoll.h" "sys/reboot.h" "sys/swap.h" \
275 "sys/sendfile.h" "sys/inotify.h" \
276 "sys/quota.h" \
277 "sys/klog.h" \
278 "sys/fsuid.h" \
279 "sys/io.h" \
280 "sys/prctl.h" \
281 "sys/mtio.h" \
282 "sys/mount.h" \
283 "sys/fanotify.h" \
284 "sys/personality.h" \
285 "elf.h" "link.h" "bits/link.h" \
286 "scsi/scsi.h" "scsi/scsi_ioctl.h" "scsi/sg.h" \
287 "sys/auxv.h" \
288 "pwd.h" "shadow.h" "grp.h" \
289 "mntent.h" \
290 "netdb.h" \
291 "resolv.h" \
292 "pty.h" \
293 "dlfcn.h" \
294 "setjmp.h" \
295 "ulimit.h" \
296 "sys/xattr.h" \
297 "wordexp.h" \
298 "spawn.h" \
299 "sys/membarrier.h" \
300 "sys/signalfd.h" \
301 "termios.h" \
302 "sys/termios.h" \
303 "bits/termios.h" \
304 "net/if.h" \
305 "net/if_arp.h" \
306 "net/ethernet.h" \
307 "net/route.h" \
308 "netinet/if_ether.h" \
309 "netinet/ether.h" \
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310 "sys/timerfd.h" \
311 "libintl.h" \
312 "sys/sysmacros.h" \
313 "utime.h"
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314
315ifeq ($(THREAD_MODEL), single)
316# Remove headers not supported in single-threaded mode.
317override MUSL_OMIT_HEADERS += "aio.h" "pthread.h"
318endif
319
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320default: check
321
322$(SYSROOT_LIB)/libc.a: $(LIBC_OBJS)
323
324$(SYSROOT_LIB)/libc-printscan-long-double.a: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS)
325
326$(SYSROOT_LIB)/libc-printscan-no-floating-point.a: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS)
327
328$(SYSROOT_LIB)/libwasi-emulated-mman.a: $(LIBWASI_EMULATED_MMAN_OBJS)
329
330%.a:
331 @mkdir -p "$(@D)"
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332 # On Windows, the commandline for the ar invocation got too long, so it needs to be split up.
333 $(WASM_AR) crs $@ $(wordlist 1, 199, $^)
334 $(WASM_AR) crs $@ $(wordlist 200, 399, $^)
335 $(WASM_AR) crs $@ $(wordlist 400, 599, $^)
336 $(WASM_AR) crs $@ $(wordlist 600, 799, $^)
337 # This might eventually overflow again, but at least it'll do so in a loud way instead of
338 # silently dropping the tail.
339 $(WASM_AR) crs $@ $(wordlist 800, 100000, $^)
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340
341$(MUSL_PRINTSCAN_OBJS): override WASM_CFLAGS += \
342 -D__wasilibc_printscan_no_long_double \
343 -D__wasilibc_printscan_full_support_option="\"add -lc-printscan-long-double to the link command\""
344
345$(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \
346 -D__wasilibc_printscan_no_floating_point \
347 -D__wasilibc_printscan_floating_point_support_option="\"remove -lc-printscan-no-floating-point from the link command\""
348
8e8cc34a 349$(OBJDIR)/%.long-double.o: $(CURDIR)/%.c include_dirs
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350 @mkdir -p "$(@D)"
351 "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
dcf13b6f 352
8e8cc34a 353$(OBJDIR)/%.no-floating-point.o: $(CURDIR)/%.c include_dirs
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354 @mkdir -p "$(@D)"
355 "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
356
8e8cc34a 357$(OBJDIR)/%.o: $(CURDIR)/%.c include_dirs
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358 @mkdir -p "$(@D)"
359 "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
360
255e6f7c 361-include $(shell find $(OBJDIR) -name \*.d)
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362
363$(DLMALLOC_OBJS): override WASM_CFLAGS += \
364 -I$(DLMALLOC_INC)
365
bdfbb545 366startup_files $(LIBC_BOTTOM_HALF_ALL_OBJS): override WASM_CFLAGS += \
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367 -I$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE) \
368 -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC) \
7fcc4f29 369 -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC)
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370
371$(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \
372 -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/include \
373 -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal \
374 -I$(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32 \
375 -I$(LIBC_TOP_HALF_MUSL_DIR)/arch/generic \
376 -I$(LIBC_TOP_HALF_HEADERS_PRIVATE) \
377 -Wno-parentheses \
378 -Wno-shift-op-parentheses \
379 -Wno-bitwise-op-parentheses \
380 -Wno-logical-op-parentheses \
381 -Wno-string-plus-int \
382 -Wno-dangling-else \
383 -Wno-unknown-pragmas
384
8e8cc34a 385include_dirs:
dcf13b6f 386 $(RM) -r "$(SYSROOT)"
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387
388 #
389 # Install the include files.
390 #
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391 mkdir -p "$(SYSROOT_INC)"
392 cp -r "$(BASICS_INC)" "$(SYSROOT)"
393 cp -r "$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)"
394
395 # Generate musl's bits/alltypes.h header.
396 mkdir -p "$(SYSROOT_INC)/bits"
397 sed -f $(LIBC_TOP_HALF_MUSL_DIR)/tools/mkalltypes.sed \
398 $(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32/bits/alltypes.h.in \
399 $(LIBC_TOP_HALF_MUSL_DIR)/include/alltypes.h.in \
400 > "$(SYSROOT_INC)/bits/alltypes.h"
401
402 # Copy in the bulk of musl's public header files.
403 cp -r "$(LIBC_TOP_HALF_MUSL_INC)"/* "$(SYSROOT_INC)"
404 # Copy in the musl's "bits" header files.
405 cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/generic/bits/* "$(SYSROOT_INC)/bits"
406 cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/wasm32/bits/* "$(SYSROOT_INC)/bits"
407
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408 # Remove selected header files.
409 $(RM) $(patsubst %,$(SYSROOT_INC)/%,$(MUSL_OMIT_HEADERS))
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410
411ifeq ($(BUILD_LIBC_BOTTOM_HALF),no)
412override CRT_SOURCES = $(BASICS_CRT_SOURCES)
413else
414override CRT_SOURCES = $(LIBC_BOTTOM_HALF_CRT_SOURCES)
415endif
dcf13b6f 416
8e8cc34a 417startup_files: include_dirs
dcf13b6f 418 #
320054e8 419 # Build the startup files.
dcf13b6f 420 #
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421 @mkdir -p "$(OBJDIR)"
422 cd "$(OBJDIR)" && \
423 "$(WASM_CC)" $(WASM_CFLAGS) -c $(CRT_SOURCES) -MD -MP && \
424 mkdir -p "$(SYSROOT_LIB)" && \
425 mv *.o "$(SYSROOT_LIB)"
dcf13b6f 426
8e8cc34a 427libc: include_dirs \
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428 $(SYSROOT_LIB)/libc.a \
429 $(SYSROOT_LIB)/libc-printscan-long-double.a \
430 $(SYSROOT_LIB)/libc-printscan-no-floating-point.a \
431 $(SYSROOT_LIB)/libwasi-emulated-mman.a
432
8e8cc34a 433finish: startup_files libc
dcf13b6f 434 #
320054e8 435 # Create empty placeholder libraries.
dcf13b6f 436 #
1f7d798a 437 for name in m rt pthread crypt util xnet resolv dl; do \
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438 $(WASM_AR) crs "$(SYSROOT_LIB)/lib$${name}.a"; \
439 done
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440
441 #
320054e8 442 # Collect metadata on the sysroot and perform sanity checks.
dbfccac2 443 #
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444 mkdir -p "$(SYSROOT_SHARE)"
445
446 # Collect symbol information.
447 # TODO: Use llvm-nm --extern-only instead of grep. This is blocked on
448 # LLVM PR40497, which is fixed in 9.0, but not in 8.0.
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449 # Ignore certain llvm builtin symbols such as those starting with __mul
450 # since these dependencies can vary between llvm versions.
255e6f7c 451 "$(WASM_NM)" --defined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/*.o \
fad009dc 452 |grep ' [[:upper:]] ' |sed 's/.* [[:upper:]] //' |LC_ALL=C sort > "$(SYSROOT_SHARE)/defined-symbols.txt"
255e6f7c 453 for undef_sym in $$("$(WASM_NM)" --undefined-only "$(SYSROOT_LIB)"/*.a "$(SYSROOT_LIB)"/*.o \
fad009dc 454 |grep ' U ' |sed 's/.* U //' |LC_ALL=C sort |uniq); do \
320054e8 455 grep -q '\<'$$undef_sym'\>' "$(SYSROOT_SHARE)/defined-symbols.txt" || echo $$undef_sym; \
c35f0f5d 456 done | grep -v "^__mul" > "$(SYSROOT_SHARE)/undefined-symbols.txt"
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457 grep '^_*wasi_' "$(SYSROOT_SHARE)/undefined-symbols.txt" \
458 > "$(SYSROOT_LIB)/libc.imports"
459
460 # Generate a test file that includes all public header files.
461 cd "$(SYSROOT)" && \
462 for header in $$(find include -type f -not -name mman.h |grep -v /bits/); do \
463 echo '#include <'$$header'>' | sed 's/include\///' ; \
fad009dc 464 done |LC_ALL=C sort >share/$(MULTIARCH_TRIPLE)/include-all.c ; \
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465 cd - >/dev/null
466
467 # Test that it compiles.
468 "$(WASM_CC)" $(WASM_CFLAGS) -fsyntax-only "$(SYSROOT_SHARE)/include-all.c" -Wno-\#warnings
469
470 # Collect all the predefined macros, except for compiler version macros
471 # which we don't need to track here. For the __*_ATOMIC_*_LOCK_FREE
472 # macros, squash individual compiler names to attempt, toward keeping
473 # these files compiler-independent.
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474 #
475 # We have to add `-isystem $(SYSROOT_INC)` because otherwise clang puts
476 # its builtin include path first, which produces compiler-specific
477 # output.
478 #
320054e8 479 # TODO: Undefine __FLOAT128__ for now since it's not in clang 8.0.
f74124a6 480 # TODO: Filter out __FLT16_* for now, as not all versions of clang have these.
320054e8 481 "$(WASM_CC)" $(WASM_CFLAGS) "$(SYSROOT_SHARE)/include-all.c" \
8df0d4cd 482 -isystem $(SYSROOT_INC) \
38b930a2 483 -std=gnu17 \
320054e8 484 -E -dM -Wno-\#warnings \
9f0d8e85 485 -D_ALL_SOURCE \
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486 -U__llvm__ \
487 -U__clang__ \
488 -U__clang_major__ \
489 -U__clang_minor__ \
490 -U__clang_patchlevel__ \
491 -U__clang_version__ \
492 -U__GNUC__ \
493 -U__GNUC_MINOR__ \
494 -U__GNUC_PATCHLEVEL__ \
495 -U__VERSION__ \
496 -U__FLOAT128__ \
497 | sed -e 's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \
f74124a6 498 | grep -v '^#define __FLT16_' \
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499 > "$(SYSROOT_SHARE)/predefined-macros.txt"
500
501 #
502 # The build succeeded! The generated sysroot is in $(SYSROOT).
503 #
504
8e8cc34a 505check: finish
320054e8 506 # Check that the computed metadata matches the expected metadata.
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507 # This ignores whitespace because on Windows the output has CRLF line endings.
508 diff -wur "$(CURDIR)/expected/$(MULTIARCH_TRIPLE)" "$(SYSROOT_SHARE)"
320054e8 509
8e8cc34a 510install: finish
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511 mkdir -p "$(INSTALL_DIR)"
512 cp -r "$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)"
513
8e8cc34a 514.PHONY: default startup_files libc finish check install include_dirs