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_LIBC_DIR = $(BASICS_DIR)/libc
  37 BASICS_CRT_SOURCES = $(wildcard $(BASICS_LIBC_DIR)/crt*.c)
  38 BASICS_LIBC_SOURCES = $(BASICS_LIBC_DIR)/string.c
  39 DLMALLOC_DIR = $(CURDIR)/dlmalloc
  40 DLMALLOC_SRC_DIR = $(DLMALLOC_DIR)/src
  41 DLMALLOC_SOURCES = $(DLMALLOC_SRC_DIR)/dlmalloc.c
  42 DLMALLOC_INC = $(DLMALLOC_DIR)/include
  43 LIBC_BOTTOM_HALF_DIR = $(CURDIR)/libc-bottom-half
  44 LIBC_BOTTOM_HALF_CLOUDLIBC_SRC = $(LIBC_BOTTOM_HALF_DIR)/cloudlibc/src
  45 LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC = $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC)/include
  46 LIBC_BOTTOM_HALF_HEADERS_PUBLIC = $(LIBC_BOTTOM_HALF_DIR)/headers/public
  47 LIBC_BOTTOM_HALF_HEADERS_PRIVATE = $(LIBC_BOTTOM_HALF_DIR)/headers/private
  48 LIBC_BOTTOM_HALF_LIBPREOPEN_DIR = $(LIBC_BOTTOM_HALF_DIR)/libpreopen
  49 LIBC_BOTTOM_HALF_LIBPREOPEN_LIB = $(LIBC_BOTTOM_HALF_LIBPREOPEN_DIR)/lib
  50 LIBC_BOTTOM_HALF_LIBPREOPEN_INC = $(LIBC_BOTTOM_HALF_LIBPREOPEN_DIR)/include
  51 LIBC_BOTTOM_HALF_SOURCES = $(LIBC_BOTTOM_HALF_DIR)/sources
  52 LIBC_BOTTOM_HALF_ALL_SOURCES = \
  53     $(shell find $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) -name \*.c) \
  54     $(LIBC_BOTTOM_HALF_LIBPREOPEN_LIB)/po_libc_wrappers.c \
  55     $(shell find $(LIBC_BOTTOM_HALF_SOURCES) -name \*.c)
  56 LIBWASI_EMULATED_MMAN_SOURCES = \
  57     $(shell find $(LIBC_BOTTOM_HALF_DIR)/mman -name \*.c)
  58 LIBC_BOTTOM_HALF_CRT_SOURCES = $(wildcard $(LIBC_BOTTOM_HALF_DIR)/crt/*.c)
  59 LIBC_TOP_HALF_DIR = $(CURDIR)/libc-top-half
  60 LIBC_TOP_HALF_MUSL_DIR = $(LIBC_TOP_HALF_DIR)/musl
  61 LIBC_TOP_HALF_MUSL_SRC_DIR = $(LIBC_TOP_HALF_MUSL_DIR)/src
  62 LIBC_TOP_HALF_MUSL_INC = $(LIBC_TOP_HALF_MUSL_DIR)/include
  63 LIBC_TOP_HALF_MUSL_SOURCES = \
  64     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/a64l.c \
  65     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/basename.c \
  66     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/dirname.c \
  67     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffs.c \
  68     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffsl.c \
  69     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffsll.c \
  70     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/fmtmsg.c \
  71     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getdomainname.c \
  72     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/gethostid.c \
  73     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getopt.c \
  74     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getopt_long.c \
  75     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getsubopt.c \
  76     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/uname.c \
  77     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/nftw.c \
  78     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/errno/strerror.c \
  79     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/htonl.c \
  80     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/htons.c \
  81     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/ntohl.c \
  82     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/ntohs.c \
  83     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fenv.c \
  84     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fesetround.c \
  85     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/exit.c \
  86     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/atexit.c \
  87     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/assert.c \
  88     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/quick_exit.c \
  89     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/at_quick_exit.c \
  90     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/strftime.c \
  91     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/asctime_r.c \
  92     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/ctime_r.c \
  93     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/wcsftime.c \
  94     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/strptime.c \
  95     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/difftime.c \
  96     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/timegm.c \
  97     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/ftime.c \
  98     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/gmtime.c \
  99     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/gmtime_r.c \
 100     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/timespec_get.c \
 101     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/getdate.c \
 102     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/localtime_r.c \
 103     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/mktime.c \
 104     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__tm_to_secs.c \
 105     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__month_to_secs.c \
 106     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__secs_to_tm.c \
 107     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__year_to_secs.c \
 108     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__tz.c \
 109     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fcntl/creat.c \
 110     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/dirent/alphasort.c \
 111     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/dirent/versionsort.c \
 112     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/__environ.c \
 113     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/clearenv.c \
 114     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/getenv.c \
 115     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/putenv.c \
 116     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/setenv.c \
 117     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/unsetenv.c \
 118     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/unistd/posix_close.c \
 119     $(filter-out %/procfdname.c %/syscall.c %/syscall_ret.c %/vdso.c %/version.c, \
 120                  $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/*.c)) \
 121     $(filter-out %/flockfile.c %/funlockfile.c %/__lockfile.c %/ftrylockfile.c \
 122                  %/rename.c \
 123                  %/tmpnam.c %/tmpfile.c %/tempnam.c \
 124                  %/popen.c %/pclose.c \
 125                  %/remove.c \
 126                  %/gets.c, \
 127                  $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/*.c)) \
 128     $(filter-out %/strsignal.c, \
 129                  $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/*.c)) \
 130     $(filter-out %/dcngettext.c %/textdomain.c, \
 131                  $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/locale/*.c)) \
 132     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/*.c) \
 133     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/search/*.c) \
 134     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/multibyte/*.c) \
 135     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/regex/*.c) \
 136     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/temp/*.c) \
 137     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/prng/*.c) \
 138     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/conf/*.c) \
 139     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/ctype/*.c) \
 140     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/math/*.c) \
 141     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/complex/*.c) \
 142     $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/crypt/*.c)
 143 MUSL_PRINTSCAN_SOURCES = \
 144     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/floatscan.c \
 145     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfprintf.c \
 146     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfscanf.c \
 147     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/strtod.c \
 148     $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/wcstod.c
 149 LIBC_TOP_HALF_HEADERS_PRIVATE = $(LIBC_TOP_HALF_DIR)/headers/private
 150 LIBC_TOP_HALF_SOURCES = $(LIBC_TOP_HALF_DIR)/sources
 151 LIBC_TOP_HALF_ALL_SOURCES = \
 152     $(LIBC_TOP_HALF_MUSL_SOURCES) \
 153     $(shell find $(LIBC_TOP_HALF_SOURCES) -name \*.c)
 154
 155 # Set the target variables. The multiarch triple is the same as the
 156 # regular triple for wasm, except that it excludes the vendor field.
 157 TARGET_TRIPLE = wasm32-unknown-wasi
 158 MULTIARCH_TRIPLE = wasm32-wasi
 159
 160 # These variables describe the locations of various files and
 161 # directories in the generated sysroot tree.
 162 SYSROOT_LIB = $(SYSROOT)/lib/$(MULTIARCH_TRIPLE)
 163 SYSROOT_INC = $(SYSROOT)/include
 164 SYSROOT_SHARE = $(SYSROOT)/share/$(MULTIARCH_TRIPLE)
 165
 166 # Set the target.
 167 override WASM_CFLAGS += --target=$(TARGET_TRIPLE)
 168 # We're compiling libc.
 169 override WASM_CFLAGS += -fno-builtin
 170 # WebAssembly floating-point match doesn't trap.
 171 # TODO: Add -fno-signaling-nans when the compiler supports it.
 172 override WASM_CFLAGS += -fno-trapping-math
 173
 174 # Configure support for threads.
 175 ifeq ($(THREAD_MODEL), single)
 176 override WASM_CFLAGS += -mthread-model single
 177 endif
 178 ifeq ($(THREAD_MODEL), posix)
 179 override WASM_CFLAGS += -mthread-model posix -pthread
 180 endif
 181
 182 # Set the sysroot.
 183 override WASM_CFLAGS += --sysroot="$(SYSROOT)"
 184
 185 objs = $(patsubst $(CURDIR)/%.c,$(OBJDIR)/%.o,$(1))
 186 override BASICS_LIBC_OBJS = $(call objs,$(BASICS_LIBC_SOURCES))
 187 override DLMALLOC_OBJS = $(call objs,$(DLMALLOC_SOURCES))
 188 override LIBC_BOTTOM_HALF_ALL_OBJS = $(call objs,$(LIBC_BOTTOM_HALF_ALL_SOURCES))
 189 override LIBC_TOP_HALF_ALL_OBJS = $(call objs,$(LIBC_TOP_HALF_ALL_SOURCES))
 190 override LIBC_OBJS := $(BASICS_LIBC_OBJS)
 191 ifeq ($(BUILD_DLMALLOC),yes)
 192 override LIBC_OBJS += $(DLMALLOC_OBJS)
 193 endif
 194 ifeq ($(BUILD_LIBC_BOTTOM_HALF),yes)
 195 # Override basics' string.o with libc-bottom-half's.
 196 override LIBC_OBJS := $(filter-out %/string.o,$(LIBC_OBJS))
 197 # Add libc-bottom-half's objects.
 198 override LIBC_OBJS += $(LIBC_BOTTOM_HALF_ALL_OBJS)
 199 endif
 200 ifeq ($(BUILD_LIBC_TOP_HALF),yes)
 201 # Override libc-bottom-half's string.o with libc-top-half's.
 202 override LIBC_OBJS := $(filter-out %/string.o,$(LIBC_OBJS))
 203 # Override libc-bottom-half's qsort.o with libc-top-half's.
 204 override LIBC_OBJS := $(filter-out %/qsort.o,$(LIBC_OBJS))
 205 # libc-top-half is musl.
 206 override LIBC_OBJS += $(LIBC_TOP_HALF_ALL_OBJS)
 207 endif
 208 override MUSL_PRINTSCAN_OBJS = $(call objs,$(MUSL_PRINTSCAN_SOURCES))
 209 override MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS))
 210 override MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS))
 211 override LIBWASI_EMULATED_MMAN_OBJS = $(call objs,$(LIBWASI_EMULATED_MMAN_SOURCES))
 212
 213 default: check
 214
 215 $(SYSROOT_LIB)/libc.a: $(LIBC_OBJS)
 216
 217 $(SYSROOT_LIB)/libc-printscan-long-double.a: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS)
 218
 219 $(SYSROOT_LIB)/libc-printscan-no-floating-point.a: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS)
 220
 221 $(SYSROOT_LIB)/libwasi-emulated-mman.a: $(LIBWASI_EMULATED_MMAN_OBJS)
 222
 223 %.a:
 224         @mkdir -p "$(@D)"
 225         $(WASM_AR) crs $@ $^
 226
 227 $(MUSL_PRINTSCAN_OBJS): override WASM_CFLAGS += \
 228             -D__wasilibc_printscan_no_long_double \
 229             -D__wasilibc_printscan_full_support_option="\"add -lc-printscan-long-double to the link command\""
 230
 231 $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \
 232             -D__wasilibc_printscan_no_floating_point \
 233             -D__wasilibc_printscan_floating_point_support_option="\"remove -lc-printscan-no-floating-point from the link command\""
 234
 235 $(OBJDIR)/%.long-double.o: $(CURDIR)/%.c $(SYSROOT_INC)
 236         @mkdir -p "$(@D)"
 237         "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
 238
 239 $(OBJDIR)/%.no-floating-point.o: $(CURDIR)/%.c $(SYSROOT_INC)
 240         @mkdir -p "$(@D)"
 241         "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
 242
 243 $(OBJDIR)/%.o: $(CURDIR)/%.c $(SYSROOT_INC)
 244         @mkdir -p "$(@D)"
 245         "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
 246
 247 include $(shell find $(OBJDIR) -name \*.d) /dev/null
 248
 249 $(DLMALLOC_OBJS): override WASM_CFLAGS += \
 250     -I$(DLMALLOC_INC)
 251
 252 $(LIBC_BOTTOM_HALF_ALL_OBJS): override WASM_CFLAGS += \
 253     -I$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE) \
 254     -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC) \
 255     -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) \
 256     -I$(LIBC_BOTTOM_HALF_LIBPREOPEN_LIB) \
 257     -I$(LIBC_BOTTOM_HALF_LIBPREOPEN_INC)
 258
 259 $(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \
 260     -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/include \
 261     -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal \
 262     -I$(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32 \
 263     -I$(LIBC_TOP_HALF_MUSL_DIR)/arch/generic \
 264     -I$(LIBC_TOP_HALF_HEADERS_PRIVATE) \
 265     -Wno-parentheses \
 266     -Wno-shift-op-parentheses \
 267     -Wno-bitwise-op-parentheses \
 268     -Wno-logical-op-parentheses \
 269     -Wno-string-plus-int \
 270     -Wno-dangling-else \
 271     -Wno-unknown-pragmas
 272
 273 $(SYSROOT): startup_files libc finish check
 274
 275 $(SYSROOT_INC):
 276         $(RM) -r "$(SYSROOT)"
 277
 278         #
 279         # Install the include files.
 280         #
 281         mkdir -p "$(SYSROOT_INC)"
 282         cp -r "$(BASICS_INC)" "$(SYSROOT)"
 283         cp -r "$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)"
 284
 285         # Generate musl's bits/alltypes.h header.
 286         mkdir -p "$(SYSROOT_INC)/bits"
 287         sed -f $(LIBC_TOP_HALF_MUSL_DIR)/tools/mkalltypes.sed \
 288             $(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32/bits/alltypes.h.in \
 289             $(LIBC_TOP_HALF_MUSL_DIR)/include/alltypes.h.in \
 290             > "$(SYSROOT_INC)/bits/alltypes.h"
 291
 292         # Copy in the bulk of musl's public header files.
 293         cp -r "$(LIBC_TOP_HALF_MUSL_INC)"/* "$(SYSROOT_INC)"
 294         # Copy in the musl's "bits" header files.
 295         cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/generic/bits/* "$(SYSROOT_INC)/bits"
 296         cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/wasm32/bits/* "$(SYSROOT_INC)/bits"
 297
 298         # Remove files that aren't headers or that aren't supported yet or that aren't relevant for wasm.
 299         $(RM) "$(SYSROOT_INC)/bits/syscall.h.in" \
 300               "$(SYSROOT_INC)/bits/alltypes.h.in" \
 301               "$(SYSROOT_INC)/alltypes.h.in" \
 302               "$(SYSROOT_INC)/sys/procfs.h" \
 303               "$(SYSROOT_INC)/sys/user.h" \
 304               "$(SYSROOT_INC)/sys/kd.h" \
 305               "$(SYSROOT_INC)/bits/kd.h" \
 306               "$(SYSROOT_INC)/sys/vt.h" \
 307               "$(SYSROOT_INC)/bits/vt.h" \
 308               "$(SYSROOT_INC)/sys/soundcard.h" \
 309               "$(SYSROOT_INC)/bits/soundcard.h" \
 310               "$(SYSROOT_INC)/sys/sem.h" \
 311               "$(SYSROOT_INC)/bits/sem.h" \
 312               "$(SYSROOT_INC)/sys/statfs.h" \
 313               "$(SYSROOT_INC)/sys/vfs.h" \
 314               "$(SYSROOT_INC)/bits/statfs.h" \
 315               "$(SYSROOT_INC)/sys/statvfs.h" \
 316               "$(SYSROOT_INC)/sys/shm.h" \
 317               "$(SYSROOT_INC)/bits/shm.h" \
 318               "$(SYSROOT_INC)/sys/msg.h" \
 319               "$(SYSROOT_INC)/bits/msg.h" \
 320               "$(SYSROOT_INC)/sys/ipc.h" \
 321               "$(SYSROOT_INC)/bits/ipc.h" \
 322               "$(SYSROOT_INC)/syslog.h" \
 323               "$(SYSROOT_INC)/sys/syslog.h" \
 324               "$(SYSROOT_INC)/paths.h" \
 325               "$(SYSROOT_INC)/utmp.h" \
 326               "$(SYSROOT_INC)/utmpx.h" \
 327               "$(SYSROOT_INC)/lastlog.h" \
 328               "$(SYSROOT_INC)/sys/acct.h" \
 329               "$(SYSROOT_INC)/sys/cachectl.h" \
 330               "$(SYSROOT_INC)/sys/epoll.h" \
 331               "$(SYSROOT_INC)/sys/ptrace.h" \
 332               "$(SYSROOT_INC)/bits/ptrace.h" \
 333               "$(SYSROOT_INC)/sys/reboot.h" \
 334               "$(SYSROOT_INC)/sys/swap.h" \
 335               "$(SYSROOT_INC)/sys/sendfile.h" \
 336               "$(SYSROOT_INC)/sys/quota.h" \
 337               "$(SYSROOT_INC)/sys/inotify.h" \
 338               "$(SYSROOT_INC)/sys/klog.h" \
 339               "$(SYSROOT_INC)/sys/fsuid.h" \
 340               "$(SYSROOT_INC)/sys/io.h" \
 341               "$(SYSROOT_INC)/sys/prctl.h" \
 342               "$(SYSROOT_INC)/sys/mtio.h" \
 343               "$(SYSROOT_INC)/sys/mount.h" \
 344               "$(SYSROOT_INC)/sys/fanotify.h" \
 345               "$(SYSROOT_INC)/sys/personality.h" \
 346               "$(SYSROOT_INC)/sys/wait.h" \
 347               "$(SYSROOT_INC)/wait.h" \
 348               "$(SYSROOT_INC)/bits/errno.h" \
 349               "$(SYSROOT_INC)/bits/link.h" \
 350               "$(SYSROOT_INC)/link.h" \
 351               "$(SYSROOT_INC)/elf.h" \
 352               "$(SYSROOT_INC)/scsi/scsi.h" \
 353               "$(SYSROOT_INC)/scsi/scsi_ioctl.h" \
 354               "$(SYSROOT_INC)/scsi/sg.h" \
 355               "$(SYSROOT_INC)/sys/auxv.h" \
 356               "$(SYSROOT_INC)/setjmp.h" \
 357               "$(SYSROOT_INC)/pwd.h" \
 358               "$(SYSROOT_INC)/shadow.h" \
 359               "$(SYSROOT_INC)/grp.h" \
 360               "$(SYSROOT_INC)/mntent.h" \
 361               "$(SYSROOT_INC)/netdb.h" \
 362               "$(SYSROOT_INC)/resolv.h" \
 363               "$(SYSROOT_INC)/pty.h" \
 364               "$(SYSROOT_INC)/dlfcn.h" \
 365               "$(SYSROOT_INC)/ulimit.h" \
 366               "$(SYSROOT_INC)/xattr.h" \
 367               "$(SYSROOT_INC)/wordexp.h" \
 368               "$(SYSROOT_INC)/spawn.h"
 369
 370 ifeq ($(BUILD_LIBC_BOTTOM_HALF),no)
 371 override CRT_SOURCES = $(BASICS_CRT_SOURCES)
 372 else
 373 override CRT_SOURCES = $(LIBC_BOTTOM_HALF_CRT_SOURCES)
 374 endif
 375
 376 startup_files: $(SYSROOT_INC)
 377         #
 378         # Build the startup files.
 379         #
 380         @mkdir -p "$(OBJDIR)"
 381         cd "$(OBJDIR)" && \
 382         "$(WASM_CC)" $(WASM_CFLAGS) -c $(CRT_SOURCES) -MD -MP && \
 383         mkdir -p "$(SYSROOT_LIB)" && \
 384         mv *.o "$(SYSROOT_LIB)"
 385
 386 libc: $(SYSROOT_INC) \
 387     $(SYSROOT_LIB)/libc.a \
 388     $(SYSROOT_LIB)/libc-printscan-long-double.a \
 389     $(SYSROOT_LIB)/libc-printscan-no-floating-point.a \
 390     $(SYSROOT_LIB)/libwasi-emulated-mman.a
 391
 392 finish: $(SYSROOT_INC) libc
 393         #
 394         # Create empty placeholder libraries.
 395         #
 396         for name in m rt pthread crypt util xnet resolv dl c++ c++abi; do \
 397             $(WASM_AR) crs "$(SYSROOT_LIB)/lib$${name}.a"; \
 398         done
 399
 400         #
 401         # Collect metadata on the sysroot and perform sanity checks.
 402         #
 403         mkdir -p "$(SYSROOT_SHARE)"
 404
 405         # Collect symbol information.
 406         # TODO: Use llvm-nm --extern-only instead of grep. This is blocked on
 407         # LLVM PR40497, which is fixed in 9.0, but not in 8.0.
 408         $(WASM_NM) --defined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/*.o \
 409             |grep ' [[:upper:]] ' |sed 's/.* [[:upper:]] //' |LC_COLLATE=C sort > "$(SYSROOT_SHARE)/defined-symbols.txt"
 410         for undef_sym in $$($(WASM_NM) --undefined-only "$(SYSROOT_LIB)"/*.a "$(SYSROOT_LIB)"/*.o \
 411             |grep ' U ' |sed 's/.* U //' |LC_COLLATE=C sort |uniq); do \
 412             grep -q '\<'$$undef_sym'\>' "$(SYSROOT_SHARE)/defined-symbols.txt" || echo $$undef_sym; \
 413         done > "$(SYSROOT_SHARE)/undefined-symbols.txt"
 414         grep '^_*wasi_' "$(SYSROOT_SHARE)/undefined-symbols.txt" \
 415             > "$(SYSROOT_LIB)/libc.imports"
 416
 417         # Generate a test file that includes all public header files.
 418         cd "$(SYSROOT)" && \
 419         for header in $$(find include -type f -not -name mman.h |grep -v /bits/); do \
 420             echo '#include <'$$header'>' | sed 's/include\///' ; \
 421         done |LC_COLLATE=C sort >share/$(MULTIARCH_TRIPLE)/include-all.c ; \
 422         cd - >/dev/null
 423
 424         # Test that it compiles.
 425         "$(WASM_CC)" $(WASM_CFLAGS) -fsyntax-only "$(SYSROOT_SHARE)/include-all.c" -Wno-\#warnings
 426
 427         # Collect all the predefined macros, except for compiler version macros
 428         # which we don't need to track here. For the __*_ATOMIC_*_LOCK_FREE
 429         # macros, squash individual compiler names to attempt, toward keeping
 430         # these files compiler-independent.
 431         # TODO: Undefine __FLOAT128__ for now since it's not in clang 8.0.
 432         "$(WASM_CC)" $(WASM_CFLAGS) "$(SYSROOT_SHARE)/include-all.c" \
 433             -E -dM -Wno-\#warnings \
 434             -U__llvm__ \
 435             -U__clang__ \
 436             -U__clang_major__ \
 437             -U__clang_minor__ \
 438             -U__clang_patchlevel__ \
 439             -U__clang_version__ \
 440             -U__GNUC__ \
 441             -U__GNUC_MINOR__ \
 442             -U__GNUC_PATCHLEVEL__ \
 443             -U__VERSION__ \
 444             -U__FLOAT128__ \
 445             | sed -e 's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \
 446             > "$(SYSROOT_SHARE)/predefined-macros.txt"
 447
 448         #
 449         # The build succeeded! The generated sysroot is in $(SYSROOT).
 450         #
 451
 452 check: $(SYSROOT) finish
 453         # Check that the computed metadata matches the expected metadata.
 454         diff -ur "$(CURDIR)/expected/$(MULTIARCH_TRIPLE)" "$(SYSROOT_SHARE)"
 455
 456 install: $(SYSROOT)
 457         mkdir -p "$(INSTALL_DIR)"
 458         cp -r "$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)"
 459
 460 .PHONY: $(SYSROOT) default startup_files libc finish check install $(SYSROOT_INC)