Makefile

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