[wasi-libc.git] / Makefile

# These variables are specifically meant to be overridable via
# the make command-line.
WASM_CC = clang
WASM_NM = $(patsubst %clang,%llvm-nm,$(WASM_CC))
WASM_AR = $(patsubst %clang,%llvm-ar,$(WASM_CC))
WASM_CFLAGS = -O2
# The directory where we build the sysroot.
SYSROOT = $(CURDIR)/sysroot
# A directory to install to for "make install".
INSTALL_DIR = /usr/local
# single or posix
THREAD_MODEL = single
# yes or no
BUILD_DLMALLOC = yes
BUILD_LIBC_BOTTOM_HALF = yes
BUILD_LIBC_TOP_HALF = yes
# The directory where we're store intermediate artifacts.
OBJDIR = $(CURDIR)/build

# Check dependencies.
ifeq ($(BUILD_LIBC_TOP_HALF),yes)
ifneq ($(BUILD_LIBC_BOTTOM_HALF),yes)
$(error BUILD_LIBC_TOP_HALF=yes depends on BUILD_LIBC_BOTTOM_HALF=yes)
endif
endif
ifeq ($(BUILD_LIBC_BOTTOM_HALF),yes)
ifneq ($(BUILD_DLMALLOC),yes)
$(error BUILD_LIBC_BOTTOM_HALF=yes depends on BUILD_DLMALLOC=yes)
endif
endif

# These variables describe the locations of various files and
# directories in the source tree.
BASICS_DIR = $(CURDIR)/basics
BASICS_INC = $(BASICS_DIR)/include
BASICS_CRT_SOURCES = $(wildcard $(BASICS_DIR)/crt/*.c)
BASICS_SOURCES = $(wildcard $(BASICS_DIR)/sources/*.c)
DLMALLOC_DIR = $(CURDIR)/dlmalloc
DLMALLOC_SRC_DIR = $(DLMALLOC_DIR)/src
DLMALLOC_SOURCES = $(DLMALLOC_SRC_DIR)/dlmalloc.c
DLMALLOC_INC = $(DLMALLOC_DIR)/include
LIBC_BOTTOM_HALF_DIR = $(CURDIR)/libc-bottom-half
LIBC_BOTTOM_HALF_CLOUDLIBC_SRC = $(LIBC_BOTTOM_HALF_DIR)/cloudlibc/src
LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC = $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC)/include
LIBC_BOTTOM_HALF_HEADERS_PUBLIC = $(LIBC_BOTTOM_HALF_DIR)/headers/public
LIBC_BOTTOM_HALF_HEADERS_PRIVATE = $(LIBC_BOTTOM_HALF_DIR)/headers/private
LIBC_BOTTOM_HALF_LIBPREOPEN_DIR = $(LIBC_BOTTOM_HALF_DIR)/libpreopen
LIBC_BOTTOM_HALF_LIBPREOPEN_LIB = $(LIBC_BOTTOM_HALF_LIBPREOPEN_DIR)/lib
LIBC_BOTTOM_HALF_LIBPREOPEN_INC = $(LIBC_BOTTOM_HALF_LIBPREOPEN_DIR)/include
LIBC_BOTTOM_HALF_SOURCES = $(LIBC_BOTTOM_HALF_DIR)/sources
LIBC_BOTTOM_HALF_ALL_SOURCES = \
    $(shell find $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) -name \*.c) \
    $(LIBC_BOTTOM_HALF_LIBPREOPEN_LIB)/po_libc_wrappers.c \
    $(shell find $(LIBC_BOTTOM_HALF_SOURCES) -name \*.c)
LIBWASI_EMULATED_MMAN_SOURCES = \
    $(shell find $(LIBC_BOTTOM_HALF_DIR)/mman -name \*.c)
LIBC_BOTTOM_HALF_CRT_SOURCES = $(wildcard $(LIBC_BOTTOM_HALF_DIR)/crt/*.c)
LIBC_TOP_HALF_DIR = $(CURDIR)/libc-top-half
LIBC_TOP_HALF_MUSL_DIR = $(LIBC_TOP_HALF_DIR)/musl
LIBC_TOP_HALF_MUSL_SRC_DIR = $(LIBC_TOP_HALF_MUSL_DIR)/src
LIBC_TOP_HALF_MUSL_INC = $(LIBC_TOP_HALF_MUSL_DIR)/include
LIBC_TOP_HALF_MUSL_SOURCES = \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/a64l.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/basename.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/dirname.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffs.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffsl.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/ffsll.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/fmtmsg.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getdomainname.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/gethostid.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getopt.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getopt_long.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/getsubopt.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/uname.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/misc/nftw.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/errno/strerror.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/htonl.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/htons.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/ntohl.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/ntohs.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fenv.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fesetround.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/exit.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/atexit.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/assert.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/quick_exit.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/at_quick_exit.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/strftime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/asctime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/asctime_r.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/ctime_r.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/wcsftime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/strptime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/difftime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/timegm.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/ftime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/gmtime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/gmtime_r.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/timespec_get.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/getdate.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/localtime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/localtime_r.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/mktime.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__tm_to_secs.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__month_to_secs.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__secs_to_tm.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__year_to_secs.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__tz.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fcntl/creat.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/dirent/alphasort.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/dirent/versionsort.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/__environ.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/clearenv.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/getenv.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/putenv.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/setenv.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/unsetenv.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/unistd/posix_close.c \
    $(filter-out %/procfdname.c %/syscall.c %/syscall_ret.c %/vdso.c %/version.c, \
                 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/*.c)) \
    $(filter-out %/flockfile.c %/funlockfile.c %/__lockfile.c %/ftrylockfile.c \
                 %/rename.c \
                 %/tmpnam.c %/tmpfile.c %/tempnam.c \
                 %/popen.c %/pclose.c \
                 %/remove.c \
                 %/gets.c, \
                 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/*.c)) \
    $(filter-out %/strsignal.c, \
                 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/*.c)) \
    $(filter-out %/dcngettext.c %/textdomain.c, \
                 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/locale/*.c)) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/search/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/multibyte/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/regex/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/prng/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/conf/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/ctype/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/math/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/complex/*.c) \
    $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/crypt/*.c)
MUSL_PRINTSCAN_SOURCES = \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/floatscan.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfprintf.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfwprintf.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfscanf.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/strtod.c \
    $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/wcstod.c
LIBC_TOP_HALF_HEADERS_PRIVATE = $(LIBC_TOP_HALF_DIR)/headers/private
LIBC_TOP_HALF_SOURCES = $(LIBC_TOP_HALF_DIR)/sources
LIBC_TOP_HALF_ALL_SOURCES = \
    $(LIBC_TOP_HALF_MUSL_SOURCES) \
    $(shell find $(LIBC_TOP_HALF_SOURCES) -name \*.c)

# Set the target variables. Multiarch triples notably omit the vendor
# field, which happens to be what we do for the main target triple too.
TARGET_TRIPLE = wasm32-wasi
MULTIARCH_TRIPLE = wasm32-wasi

# These variables describe the locations of various files and
# directories in the generated sysroot tree.
SYSROOT_LIB = $(SYSROOT)/lib/$(MULTIARCH_TRIPLE)
SYSROOT_INC = $(SYSROOT)/include
SYSROOT_SHARE = $(SYSROOT)/share/$(MULTIARCH_TRIPLE)

# Set the target.
override WASM_CFLAGS += --target=$(TARGET_TRIPLE)
# We're compiling libc.
override WASM_CFLAGS += -fno-builtin
# WebAssembly floating-point match doesn't trap.
# TODO: Add -fno-signaling-nans when the compiler supports it.
override WASM_CFLAGS += -fno-trapping-math

# Configure support for threads.
ifeq ($(THREAD_MODEL), single)
override WASM_CFLAGS += -mthread-model single
endif
ifeq ($(THREAD_MODEL), posix)
override WASM_CFLAGS += -mthread-model posix -pthread
endif

# Set the sysroot.
override WASM_CFLAGS += --sysroot="$(SYSROOT)"

objs = $(patsubst $(CURDIR)/%.c,$(OBJDIR)/%.o,$(1))
override BASICS_OBJS = $(call objs,$(BASICS_SOURCES))
override DLMALLOC_OBJS = $(call objs,$(DLMALLOC_SOURCES))
override LIBC_BOTTOM_HALF_ALL_OBJS = $(call objs,$(LIBC_BOTTOM_HALF_ALL_SOURCES))
override LIBC_TOP_HALF_ALL_OBJS = $(call objs,$(LIBC_TOP_HALF_ALL_SOURCES))
override LIBC_OBJS := $(BASICS_OBJS)
ifeq ($(BUILD_DLMALLOC),yes)
override LIBC_OBJS += $(DLMALLOC_OBJS)
endif
ifeq ($(BUILD_LIBC_BOTTOM_HALF),yes)
# Override basics' string.o with libc-bottom-half's.
override LIBC_OBJS := $(filter-out %/string.o,$(LIBC_OBJS))
# Add libc-bottom-half's objects.
override LIBC_OBJS += $(LIBC_BOTTOM_HALF_ALL_OBJS)
endif
ifeq ($(BUILD_LIBC_TOP_HALF),yes)
# Override libc-bottom-half's string.o with libc-top-half's.
override LIBC_OBJS := $(filter-out %/string.o,$(LIBC_OBJS))
# Override libc-bottom-half's qsort.o with libc-top-half's.
override LIBC_OBJS := $(filter-out %/qsort.o,$(LIBC_OBJS))
# libc-top-half is musl.
override LIBC_OBJS += $(LIBC_TOP_HALF_ALL_OBJS)
endif
override MUSL_PRINTSCAN_OBJS = $(call objs,$(MUSL_PRINTSCAN_SOURCES))
override MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS))
override MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS))
override LIBWASI_EMULATED_MMAN_OBJS = $(call objs,$(LIBWASI_EMULATED_MMAN_SOURCES))

default: check

$(SYSROOT_LIB)/libc.a: $(LIBC_OBJS)

$(SYSROOT_LIB)/libc-printscan-long-double.a: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS)

$(SYSROOT_LIB)/libc-printscan-no-floating-point.a: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS)

$(SYSROOT_LIB)/libwasi-emulated-mman.a: $(LIBWASI_EMULATED_MMAN_OBJS)

%.a:
	@mkdir -p "$(@D)"
	$(WASM_AR) crs $@ $^

$(MUSL_PRINTSCAN_OBJS): override WASM_CFLAGS += \
	    -D__wasilibc_printscan_no_long_double \
	    -D__wasilibc_printscan_full_support_option="\"add -lc-printscan-long-double to the link command\""

$(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \
	    -D__wasilibc_printscan_no_floating_point \
	    -D__wasilibc_printscan_floating_point_support_option="\"remove -lc-printscan-no-floating-point from the link command\""

$(OBJDIR)/%.long-double.o: $(CURDIR)/%.c $(SYSROOT_INC)
	@mkdir -p "$(@D)"
	"$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<

$(OBJDIR)/%.no-floating-point.o: $(CURDIR)/%.c $(SYSROOT_INC)
	@mkdir -p "$(@D)"
	"$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<

$(OBJDIR)/%.o: $(CURDIR)/%.c $(SYSROOT_INC)
	@mkdir -p "$(@D)"
	"$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<

include $(shell find $(OBJDIR) -name \*.d) /dev/null

$(DLMALLOC_OBJS): override WASM_CFLAGS += \
    -I$(DLMALLOC_INC)

$(LIBC_BOTTOM_HALF_ALL_OBJS): override WASM_CFLAGS += \
    -I$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE) \
    -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC) \
    -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) \
    -I$(LIBC_BOTTOM_HALF_LIBPREOPEN_LIB) \
    -I$(LIBC_BOTTOM_HALF_LIBPREOPEN_INC)

$(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \
    -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/include \
    -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal \
    -I$(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32 \
    -I$(LIBC_TOP_HALF_MUSL_DIR)/arch/generic \
    -I$(LIBC_TOP_HALF_HEADERS_PRIVATE) \
    -Wno-parentheses \
    -Wno-shift-op-parentheses \
    -Wno-bitwise-op-parentheses \
    -Wno-logical-op-parentheses \
    -Wno-string-plus-int \
    -Wno-dangling-else \
    -Wno-unknown-pragmas

$(SYSROOT): startup_files libc finish check

$(SYSROOT_INC):
	$(RM) -r "$(SYSROOT)"

	#
	# Install the include files.
	#
	mkdir -p "$(SYSROOT_INC)"
	cp -r "$(BASICS_INC)" "$(SYSROOT)"
	cp -r "$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)"

	# Generate musl's bits/alltypes.h header.
	mkdir -p "$(SYSROOT_INC)/bits"
	sed -f $(LIBC_TOP_HALF_MUSL_DIR)/tools/mkalltypes.sed \
	    $(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32/bits/alltypes.h.in \
	    $(LIBC_TOP_HALF_MUSL_DIR)/include/alltypes.h.in \
	    > "$(SYSROOT_INC)/bits/alltypes.h"

	# Copy in the bulk of musl's public header files.
	cp -r "$(LIBC_TOP_HALF_MUSL_INC)"/* "$(SYSROOT_INC)"
	# Copy in the musl's "bits" header files.
	cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/generic/bits/* "$(SYSROOT_INC)/bits"
	cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/wasm32/bits/* "$(SYSROOT_INC)/bits"

	# Remove files that aren't headers or that aren't supported yet or that aren't relevant for wasm.
	$(RM) "$(SYSROOT_INC)/bits/syscall.h.in" \
	      "$(SYSROOT_INC)/bits/alltypes.h.in" \
	      "$(SYSROOT_INC)/alltypes.h.in" \
	      "$(SYSROOT_INC)/sys/procfs.h" \
	      "$(SYSROOT_INC)/sys/user.h" \
	      "$(SYSROOT_INC)/sys/kd.h" \
	      "$(SYSROOT_INC)/bits/kd.h" \
	      "$(SYSROOT_INC)/sys/vt.h" \
	      "$(SYSROOT_INC)/bits/vt.h" \
	      "$(SYSROOT_INC)/sys/soundcard.h" \
	      "$(SYSROOT_INC)/bits/soundcard.h" \
	      "$(SYSROOT_INC)/sys/sem.h" \
	      "$(SYSROOT_INC)/bits/sem.h" \
	      "$(SYSROOT_INC)/sys/statfs.h" \
	      "$(SYSROOT_INC)/sys/vfs.h" \
	      "$(SYSROOT_INC)/bits/statfs.h" \
	      "$(SYSROOT_INC)/sys/statvfs.h" \
	      "$(SYSROOT_INC)/sys/shm.h" \
	      "$(SYSROOT_INC)/bits/shm.h" \
	      "$(SYSROOT_INC)/sys/msg.h" \
	      "$(SYSROOT_INC)/bits/msg.h" \
	      "$(SYSROOT_INC)/sys/ipc.h" \
	      "$(SYSROOT_INC)/bits/ipc.h" \
	      "$(SYSROOT_INC)/syslog.h" \
	      "$(SYSROOT_INC)/sys/syslog.h" \
	      "$(SYSROOT_INC)/paths.h" \
	      "$(SYSROOT_INC)/utmp.h" \
	      "$(SYSROOT_INC)/utmpx.h" \
	      "$(SYSROOT_INC)/lastlog.h" \
	      "$(SYSROOT_INC)/sys/acct.h" \
	      "$(SYSROOT_INC)/sys/cachectl.h" \
	      "$(SYSROOT_INC)/sys/epoll.h" \
	      "$(SYSROOT_INC)/sys/ptrace.h" \
	      "$(SYSROOT_INC)/bits/ptrace.h" \
	      "$(SYSROOT_INC)/sys/reboot.h" \
	      "$(SYSROOT_INC)/sys/swap.h" \
	      "$(SYSROOT_INC)/sys/sendfile.h" \
	      "$(SYSROOT_INC)/sys/quota.h" \
	      "$(SYSROOT_INC)/sys/inotify.h" \
	      "$(SYSROOT_INC)/sys/klog.h" \
	      "$(SYSROOT_INC)/sys/fsuid.h" \
	      "$(SYSROOT_INC)/sys/io.h" \
	      "$(SYSROOT_INC)/sys/prctl.h" \
	      "$(SYSROOT_INC)/sys/mtio.h" \
	      "$(SYSROOT_INC)/sys/mount.h" \
	      "$(SYSROOT_INC)/sys/fanotify.h" \
	      "$(SYSROOT_INC)/sys/personality.h" \
	      "$(SYSROOT_INC)/sys/wait.h" \
	      "$(SYSROOT_INC)/wait.h" \
	      "$(SYSROOT_INC)/bits/errno.h" \
	      "$(SYSROOT_INC)/bits/link.h" \
	      "$(SYSROOT_INC)/link.h" \
	      "$(SYSROOT_INC)/elf.h" \
	      "$(SYSROOT_INC)/scsi/scsi.h" \
	      "$(SYSROOT_INC)/scsi/scsi_ioctl.h" \
	      "$(SYSROOT_INC)/scsi/sg.h" \
	      "$(SYSROOT_INC)/sys/auxv.h" \
	      "$(SYSROOT_INC)/setjmp.h" \
	      "$(SYSROOT_INC)/pwd.h" \
	      "$(SYSROOT_INC)/shadow.h" \
	      "$(SYSROOT_INC)/grp.h" \
	      "$(SYSROOT_INC)/mntent.h" \
	      "$(SYSROOT_INC)/netdb.h" \
	      "$(SYSROOT_INC)/resolv.h" \
	      "$(SYSROOT_INC)/pty.h" \
	      "$(SYSROOT_INC)/dlfcn.h" \
	      "$(SYSROOT_INC)/ulimit.h" \
	      "$(SYSROOT_INC)/xattr.h" \
	      "$(SYSROOT_INC)/wordexp.h" \
	      "$(SYSROOT_INC)/spawn.h" \
	      "$(SYSROOT_INC)/ucontext.h" \
	      "$(SYSROOT_INC)/sys/ucontext.h" \
	      "$(SYSROOT_INC)/sys/membarrier.h" \
	      "$(SYSROOT_INC)/sys/signalfd.h"
ifeq ($(THREAD_MODEL), single)
	$(RM) "$(SYSROOT_INC)/aio.h" \
	      "$(SYSROOT_INC)/pthread.h"
endif

ifeq ($(BUILD_LIBC_BOTTOM_HALF),no)
override CRT_SOURCES = $(BASICS_CRT_SOURCES)
else
override CRT_SOURCES = $(LIBC_BOTTOM_HALF_CRT_SOURCES)
endif

startup_files: $(SYSROOT_INC)
	#
	# Build the startup files.
	#
	@mkdir -p "$(OBJDIR)"
	cd "$(OBJDIR)" && \
	"$(WASM_CC)" $(WASM_CFLAGS) -c $(CRT_SOURCES) -MD -MP && \
	mkdir -p "$(SYSROOT_LIB)" && \
	mv *.o "$(SYSROOT_LIB)"

libc: $(SYSROOT_INC) \
    $(SYSROOT_LIB)/libc.a \
    $(SYSROOT_LIB)/libc-printscan-long-double.a \
    $(SYSROOT_LIB)/libc-printscan-no-floating-point.a \
    $(SYSROOT_LIB)/libwasi-emulated-mman.a

finish: $(SYSROOT_INC) libc
	#
	# Create empty placeholder libraries.
	#
	for name in m rt pthread crypt util xnet resolv dl c++ c++abi; do \
	    $(WASM_AR) crs "$(SYSROOT_LIB)/lib$${name}.a"; \
	done

	#
	# Collect metadata on the sysroot and perform sanity checks.
	#
	mkdir -p "$(SYSROOT_SHARE)"

	# Collect symbol information.
	# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on
	# LLVM PR40497, which is fixed in 9.0, but not in 8.0.
	$(WASM_NM) --defined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/*.o \
	    |grep ' [[:upper:]] ' |sed 's/.* [[:upper:]] //' |LC_ALL=C sort > "$(SYSROOT_SHARE)/defined-symbols.txt"
	for undef_sym in $$($(WASM_NM) --undefined-only "$(SYSROOT_LIB)"/*.a "$(SYSROOT_LIB)"/*.o \
	    |grep ' U ' |sed 's/.* U //' |LC_ALL=C sort |uniq); do \
	    grep -q '\<'$$undef_sym'\>' "$(SYSROOT_SHARE)/defined-symbols.txt" || echo $$undef_sym; \
	done > "$(SYSROOT_SHARE)/undefined-symbols.txt"
	grep '^_*wasi_' "$(SYSROOT_SHARE)/undefined-symbols.txt" \
	    > "$(SYSROOT_LIB)/libc.imports"

	# Generate a test file that includes all public header files.
	cd "$(SYSROOT)" && \
	for header in $$(find include -type f -not -name mman.h |grep -v /bits/); do \
	    echo '#include <'$$header'>' | sed 's/include\///' ; \
	done |LC_ALL=C sort >share/$(MULTIARCH_TRIPLE)/include-all.c ; \
	cd - >/dev/null

	# Test that it compiles.
	"$(WASM_CC)" $(WASM_CFLAGS) -fsyntax-only "$(SYSROOT_SHARE)/include-all.c" -Wno-\#warnings

	# Collect all the predefined macros, except for compiler version macros
	# which we don't need to track here. For the __*_ATOMIC_*_LOCK_FREE
	# macros, squash individual compiler names to attempt, toward keeping
	# these files compiler-independent.
	# TODO: Undefine __FLOAT128__ for now since it's not in clang 8.0.
	# TODO: Filter out __FLT16_* for now, as not all versions of clang have these.
	"$(WASM_CC)" $(WASM_CFLAGS) "$(SYSROOT_SHARE)/include-all.c" \
	    -E -dM -Wno-\#warnings \
	    -D_ALL_SOURCE \
	    -U__llvm__ \
	    -U__clang__ \
	    -U__clang_major__ \
	    -U__clang_minor__ \
	    -U__clang_patchlevel__ \
	    -U__clang_version__ \
	    -U__GNUC__ \
	    -U__GNUC_MINOR__ \
	    -U__GNUC_PATCHLEVEL__ \
	    -U__VERSION__ \
	    -U__FLOAT128__ \
	    | sed -e 's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \
	    | grep -v '^#define __FLT16_' \
	    > "$(SYSROOT_SHARE)/predefined-macros.txt"

	#
	# The build succeeded! The generated sysroot is in $(SYSROOT).
	#

check: $(SYSROOT) finish
	# Check that the computed metadata matches the expected metadata.
	diff -ur "$(CURDIR)/expected/$(MULTIARCH_TRIPLE)" "$(SYSROOT_SHARE)"

install: $(SYSROOT)
	mkdir -p "$(INSTALL_DIR)"
	cp -r "$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)"

.PHONY: $(SYSROOT) default startup_files libc finish check install $(SYSROOT_INC)
Commit	Line	Data
dcf13b6f DG	1	# These variables are specifically meant to be overridable via
	2	# the make command-line.
	3	WASM_CC = clang
320054e8 DG	4	WASM_NM = $(patsubst %clang,%llvm-nm,$(WASM_CC))
320054e8 DG	5	WASM_AR = $(patsubst %clang,%llvm-ar,$(WASM_CC))
dcf13b6f	6	WASM_CFLAGS = -O2
320054e8 DG	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
dbfccac2 DG	11	# single or posix
dbfccac2 DG	12	THREAD_MODEL = single
320054e8 DG	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
dcf13b6f DG	31
	32	# These variables describe the locations of various files and
	33	# directories in the source tree.
320054e8	34	BASICS_DIR = $(CURDIR)/basics
dbfccac2	35	BASICS_INC = $(BASICS_DIR)/include
ad03c82d DG	36	BASICS_CRT_SOURCES = $(wildcard $(BASICS_DIR)/crt/*.c)
ad03c82d DG	37	BASICS_SOURCES = $(wildcard $(BASICS_DIR)/sources/*.c)
320054e8	38	DLMALLOC_DIR = $(CURDIR)/dlmalloc
dbfccac2	39	DLMALLOC_SRC_DIR = $(DLMALLOC_DIR)/src
320054e8	40	DLMALLOC_SOURCES = $(DLMALLOC_SRC_DIR)/dlmalloc.c
dbfccac2	41	DLMALLOC_INC = $(DLMALLOC_DIR)/include
320054e8 DG	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)/fenv/fenv.c \
	83	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fesetround.c \
	84	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/exit.c \
	85	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/atexit.c \
	86	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/assert.c \
	87	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/quick_exit.c \
	88	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/exit/at_quick_exit.c \
	89	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/strftime.c \
5ce487a7	90	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/asctime.c \
320054e8 DG	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 \
03a1adbf	102	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/localtime.c \
320054e8 DG	103	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/localtime_r.c \
	104	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/mktime.c \
	105	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__tm_to_secs.c \
	106	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__month_to_secs.c \
	107	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__secs_to_tm.c \
	108	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__year_to_secs.c \
	109	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/time/__tz.c \
	110	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/fcntl/creat.c \
	111	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/dirent/alphasort.c \
	112	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/dirent/versionsort.c \
	113	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/__environ.c \
	114	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/clearenv.c \
	115	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/getenv.c \
	116	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/putenv.c \
	117	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/setenv.c \
	118	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/env/unsetenv.c \
	119	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/unistd/posix_close.c \
	120	$(filter-out %/procfdname.c %/syscall.c %/syscall_ret.c %/vdso.c %/version.c, \
	121	$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/*.c)) \
	122	$(filter-out %/flockfile.c %/funlockfile.c %/__lockfile.c %/ftrylockfile.c \
	123	%/rename.c \
	124	%/tmpnam.c %/tmpfile.c %/tempnam.c \
	125	%/popen.c %/pclose.c \
	126	%/remove.c \
	127	%/gets.c, \
	128	$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/*.c)) \
	129	$(filter-out %/strsignal.c, \
	130	$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/*.c)) \
	131	$(filter-out %/dcngettext.c %/textdomain.c, \
	132	$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/locale/*.c)) \
	133	$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/*.c) \
	134	$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/search/*.c) \
	135	$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/multibyte/*.c) \
	136	$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/regex/*.c) \
320054e8 DG	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 \
2201343c	146	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfwprintf.c \
320054e8 DG	147	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfscanf.c \
	148	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/strtod.c \
	149	$(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/wcstod.c
	150	LIBC_TOP_HALF_HEADERS_PRIVATE = $(LIBC_TOP_HALF_DIR)/headers/private
	151	LIBC_TOP_HALF_SOURCES = $(LIBC_TOP_HALF_DIR)/sources
	152	LIBC_TOP_HALF_ALL_SOURCES = \
	153	$(LIBC_TOP_HALF_MUSL_SOURCES) \
	154	$(shell find $(LIBC_TOP_HALF_SOURCES) -name \*.c)
	155
9f103c28 DG	156	# Set the target variables. Multiarch triples notably omit the vendor
	157	# field, which happens to be what we do for the main target triple too.
	158	TARGET_TRIPLE = wasm32-wasi
320054e8 DG	159	MULTIARCH_TRIPLE = wasm32-wasi
	160
	161	# These variables describe the locations of various files and
	162	# directories in the generated sysroot tree.
	163	SYSROOT_LIB = $(SYSROOT)/lib/$(MULTIARCH_TRIPLE)
	164	SYSROOT_INC = $(SYSROOT)/include
	165	SYSROOT_SHARE = $(SYSROOT)/share/$(MULTIARCH_TRIPLE)
	166
	167	# Set the target.
	168	override WASM_CFLAGS += --target=$(TARGET_TRIPLE)
	169	# We're compiling libc.
	170	override WASM_CFLAGS += -fno-builtin
	171	# WebAssembly floating-point match doesn't trap.
	172	# TODO: Add -fno-signaling-nans when the compiler supports it.
	173	override WASM_CFLAGS += -fno-trapping-math
dbfccac2 DG	174
dbfccac2 DG	175	# Configure support for threads.
320054e8 DG	176	ifeq ($(THREAD_MODEL), single)
320054e8 DG	177	override WASM_CFLAGS += -mthread-model single
dbfccac2	178	endif
320054e8 DG	179	ifeq ($(THREAD_MODEL), posix)
	180	override WASM_CFLAGS += -mthread-model posix -pthread
	181	endif
	182
	183	# Set the sysroot.
	184	override WASM_CFLAGS += --sysroot="$(SYSROOT)"
	185
	186	objs = $(patsubst $(CURDIR)/%.c,$(OBJDIR)/%.o,$(1))
ad03c82d	187	override BASICS_OBJS = $(call objs,$(BASICS_SOURCES))
320054e8 DG	188	override DLMALLOC_OBJS = $(call objs,$(DLMALLOC_SOURCES))
	189	override LIBC_BOTTOM_HALF_ALL_OBJS = $(call objs,$(LIBC_BOTTOM_HALF_ALL_SOURCES))
	190	override LIBC_TOP_HALF_ALL_OBJS = $(call objs,$(LIBC_TOP_HALF_ALL_SOURCES))
ad03c82d	191	override LIBC_OBJS := $(BASICS_OBJS)
320054e8 DG	192	ifeq ($(BUILD_DLMALLOC),yes)
320054e8 DG	193	override LIBC_OBJS += $(DLMALLOC_OBJS)
dbfccac2	194	endif
320054e8 DG	195	ifeq ($(BUILD_LIBC_BOTTOM_HALF),yes)
	196	# Override basics' string.o with libc-bottom-half's.
	197	override LIBC_OBJS := $(filter-out %/string.o,$(LIBC_OBJS))
	198	# Add libc-bottom-half's objects.
	199	override LIBC_OBJS += $(LIBC_BOTTOM_HALF_ALL_OBJS)
	200	endif
	201	ifeq ($(BUILD_LIBC_TOP_HALF),yes)
	202	# Override libc-bottom-half's string.o with libc-top-half's.
	203	override LIBC_OBJS := $(filter-out %/string.o,$(LIBC_OBJS))
	204	# Override libc-bottom-half's qsort.o with libc-top-half's.
	205	override LIBC_OBJS := $(filter-out %/qsort.o,$(LIBC_OBJS))
	206	# libc-top-half is musl.
	207	override LIBC_OBJS += $(LIBC_TOP_HALF_ALL_OBJS)
	208	endif
	209	override MUSL_PRINTSCAN_OBJS = $(call objs,$(MUSL_PRINTSCAN_SOURCES))
	210	override MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS))
	211	override MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS))
	212	override LIBWASI_EMULATED_MMAN_OBJS = $(call objs,$(LIBWASI_EMULATED_MMAN_SOURCES))
	213
	214	default: check
	215
	216	$(SYSROOT_LIB)/libc.a: $(LIBC_OBJS)
	217
	218	$(SYSROOT_LIB)/libc-printscan-long-double.a: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS)
	219
	220	$(SYSROOT_LIB)/libc-printscan-no-floating-point.a: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS)
	221
	222	$(SYSROOT_LIB)/libwasi-emulated-mman.a: $(LIBWASI_EMULATED_MMAN_OBJS)
	223
	224	%.a:
	225	@mkdir -p "$(@D)"
	226	$(WASM_AR) crs $@ $^
	227
	228	$(MUSL_PRINTSCAN_OBJS): override WASM_CFLAGS += \
	229	-D__wasilibc_printscan_no_long_double \
	230	-D__wasilibc_printscan_full_support_option="\"add -lc-printscan-long-double to the link command\""
	231
	232	$(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \
	233	-D__wasilibc_printscan_no_floating_point \
	234	-D__wasilibc_printscan_floating_point_support_option="\"remove -lc-printscan-no-floating-point from the link command\""
	235
	236	$(OBJDIR)/%.long-double.o: $(CURDIR)/%.c $(SYSROOT_INC)
	237	@mkdir -p "$(@D)"
	238	"$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
dcf13b6f	239
320054e8 DG	240	$(OBJDIR)/%.no-floating-point.o: $(CURDIR)/%.c $(SYSROOT_INC)
	241	@mkdir -p "$(@D)"
	242	"$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
	243
	244	$(OBJDIR)/%.o: $(CURDIR)/%.c $(SYSROOT_INC)
	245	@mkdir -p "$(@D)"
	246	"$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $<
	247
	248	include $(shell find $(OBJDIR) -name \*.d) /dev/null
	249
	250	$(DLMALLOC_OBJS): override WASM_CFLAGS += \
	251	-I$(DLMALLOC_INC)
	252
	253	$(LIBC_BOTTOM_HALF_ALL_OBJS): override WASM_CFLAGS += \
	254	-I$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE) \
	255	-I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC) \
	256	-I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) \
	257	-I$(LIBC_BOTTOM_HALF_LIBPREOPEN_LIB) \
	258	-I$(LIBC_BOTTOM_HALF_LIBPREOPEN_INC)
	259
	260	$(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \
	261	-I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/include \
	262	-I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal \
	263	-I$(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32 \
	264	-I$(LIBC_TOP_HALF_MUSL_DIR)/arch/generic \
	265	-I$(LIBC_TOP_HALF_HEADERS_PRIVATE) \
	266	-Wno-parentheses \
	267	-Wno-shift-op-parentheses \
	268	-Wno-bitwise-op-parentheses \
	269	-Wno-logical-op-parentheses \
	270	-Wno-string-plus-int \
	271	-Wno-dangling-else \
	272	-Wno-unknown-pragmas
	273
	274	$(SYSROOT): startup_files libc finish check
	275
	276	$(SYSROOT_INC):
dcf13b6f	277	$(RM) -r "$(SYSROOT)"
dcf13b6f DG	278
	279	#
	280	# Install the include files.
	281	#
320054e8 DG	282	mkdir -p "$(SYSROOT_INC)"
	283	cp -r "$(BASICS_INC)" "$(SYSROOT)"
	284	cp -r "$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)"
	285
	286	# Generate musl's bits/alltypes.h header.
	287	mkdir -p "$(SYSROOT_INC)/bits"
	288	sed -f $(LIBC_TOP_HALF_MUSL_DIR)/tools/mkalltypes.sed \
	289	$(LIBC_TOP_HALF_MUSL_DIR)/arch/wasm32/bits/alltypes.h.in \
	290	$(LIBC_TOP_HALF_MUSL_DIR)/include/alltypes.h.in \
	291	> "$(SYSROOT_INC)/bits/alltypes.h"
	292
	293	# Copy in the bulk of musl's public header files.
	294	cp -r "$(LIBC_TOP_HALF_MUSL_INC)"/* "$(SYSROOT_INC)"
	295	# Copy in the musl's "bits" header files.
	296	cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/generic/bits/* "$(SYSROOT_INC)/bits"
	297	cp -r "$(LIBC_TOP_HALF_MUSL_DIR)"/arch/wasm32/bits/* "$(SYSROOT_INC)/bits"
	298
	299	# Remove files that aren't headers or that aren't supported yet or that aren't relevant for wasm.
	300	$(RM) "$(SYSROOT_INC)/bits/syscall.h.in" \
	301	"$(SYSROOT_INC)/bits/alltypes.h.in" \
	302	"$(SYSROOT_INC)/alltypes.h.in" \
	303	"$(SYSROOT_INC)/sys/procfs.h" \
	304	"$(SYSROOT_INC)/sys/user.h" \
	305	"$(SYSROOT_INC)/sys/kd.h" \
	306	"$(SYSROOT_INC)/bits/kd.h" \
	307	"$(SYSROOT_INC)/sys/vt.h" \
	308	"$(SYSROOT_INC)/bits/vt.h" \
	309	"$(SYSROOT_INC)/sys/soundcard.h" \
	310	"$(SYSROOT_INC)/bits/soundcard.h" \
	311	"$(SYSROOT_INC)/sys/sem.h" \
	312	"$(SYSROOT_INC)/bits/sem.h" \
	313	"$(SYSROOT_INC)/sys/statfs.h" \
	314	"$(SYSROOT_INC)/sys/vfs.h" \
	315	"$(SYSROOT_INC)/bits/statfs.h" \
	316	"$(SYSROOT_INC)/sys/statvfs.h" \
	317	"$(SYSROOT_INC)/sys/shm.h" \
	318	"$(SYSROOT_INC)/bits/shm.h" \
	319	"$(SYSROOT_INC)/sys/msg.h" \
	320	"$(SYSROOT_INC)/bits/msg.h" \
	321	"$(SYSROOT_INC)/sys/ipc.h" \
	322	"$(SYSROOT_INC)/bits/ipc.h" \
	323	"$(SYSROOT_INC)/syslog.h" \
	324	"$(SYSROOT_INC)/sys/syslog.h" \
	325	"$(SYSROOT_INC)/paths.h" \
	326	"$(SYSROOT_INC)/utmp.h" \
	327	"$(SYSROOT_INC)/utmpx.h" \
	328	"$(SYSROOT_INC)/lastlog.h" \
	329	"$(SYSROOT_INC)/sys/acct.h" \
	330	"$(SYSROOT_INC)/sys/cachectl.h" \
	331	"$(SYSROOT_INC)/sys/epoll.h" \
	332	"$(SYSROOT_INC)/sys/ptrace.h" \
	333	"$(SYSROOT_INC)/bits/ptrace.h" \
	334	"$(SYSROOT_INC)/sys/reboot.h" \
	335	"$(SYSROOT_INC)/sys/swap.h" \
	336	"$(SYSROOT_INC)/sys/sendfile.h" \
	337	"$(SYSROOT_INC)/sys/quota.h" \
	338	"$(SYSROOT_INC)/sys/inotify.h" \
	339	"$(SYSROOT_INC)/sys/klog.h" \
	340	"$(SYSROOT_INC)/sys/fsuid.h" \
	341	"$(SYSROOT_INC)/sys/io.h" \
	342	"$(SYSROOT_INC)/sys/prctl.h" \
	343	"$(SYSROOT_INC)/sys/mtio.h" \
	344	"$(SYSROOT_INC)/sys/mount.h" \
	345	"$(SYSROOT_INC)/sys/fanotify.h" \
346	"$(SYSROOT_INC)/sys/personality.h" \
347	"$(SYSROOT_INC)/sys/wait.h" \
348	"$(SYSROOT_INC)/wait.h" \
349	"$(SYSROOT_INC)/bits/errno.h" \
350	"$(SYSROOT_INC)/bits/link.h" \
351	"$(SYSROOT_INC)/link.h" \
352	"$(SYSROOT_INC)/elf.h" \
353	"$(SYSROOT_INC)/scsi/scsi.h" \
354	"$(SYSROOT_INC)/scsi/scsi_ioctl.h" \
355	"$(SYSROOT_INC)/scsi/sg.h" \
356	"$(SYSROOT_INC)/sys/auxv.h" \
357	"$(SYSROOT_INC)/setjmp.h" \
358	"$(SYSROOT_INC)/pwd.h" \
359	"$(SYSROOT_INC)/shadow.h" \
360	"$(SYSROOT_INC)/grp.h" \
361	"$(SYSROOT_INC)/mntent.h" \
362	"$(SYSROOT_INC)/netdb.h" \
363	"$(SYSROOT_INC)/resolv.h" \
364	"$(SYSROOT_INC)/pty.h" \
365	"$(SYSROOT_INC)/dlfcn.h" \
366	"$(SYSROOT_INC)/ulimit.h" \
367	"$(SYSROOT_INC)/xattr.h" \
368	"$(SYSROOT_INC)/wordexp.h" \
079d7bda DG	369	"$(SYSROOT_INC)/spawn.h" \
079d7bda DG	370	"$(SYSROOT_INC)/ucontext.h" \
f41256b6	371	"$(SYSROOT_INC)/sys/ucontext.h" \
29d45024 DG	372	"$(SYSROOT_INC)/sys/membarrier.h" \
29d45024 DG	373	"$(SYSROOT_INC)/sys/signalfd.h"
9f0d8e85 DG	374	ifeq ($(THREAD_MODEL), single)
	375	$(RM) "$(SYSROOT_INC)/aio.h" \
	376	"$(SYSROOT_INC)/pthread.h"
	377	endif
320054e8 DG	378
	379	ifeq ($(BUILD_LIBC_BOTTOM_HALF),no)
	380	override CRT_SOURCES = $(BASICS_CRT_SOURCES)
	381	else
	382	override CRT_SOURCES = $(LIBC_BOTTOM_HALF_CRT_SOURCES)
	383	endif
dcf13b6f	384
320054e8	385	startup_files: $(SYSROOT_INC)
dcf13b6f	386	#
320054e8	387	# Build the startup files.
dcf13b6f	388	#
320054e8 DG	389	@mkdir -p "$(OBJDIR)"
	390	cd "$(OBJDIR)" && \
	391	"$(WASM_CC)" $(WASM_CFLAGS) -c $(CRT_SOURCES) -MD -MP && \
	392	mkdir -p "$(SYSROOT_LIB)" && \
	393	mv *.o "$(SYSROOT_LIB)"
dcf13b6f	394
320054e8 DG	395	libc: $(SYSROOT_INC) \
	396	$(SYSROOT_LIB)/libc.a \
	397	$(SYSROOT_LIB)/libc-printscan-long-double.a \
	398	$(SYSROOT_LIB)/libc-printscan-no-floating-point.a \
	399	$(SYSROOT_LIB)/libwasi-emulated-mman.a
	400
	401	finish: $(SYSROOT_INC) libc
dcf13b6f	402	#
320054e8	403	# Create empty placeholder libraries.
dcf13b6f	404	#
320054e8 DG	405	for name in m rt pthread crypt util xnet resolv dl c++ c++abi; do \
	406	$(WASM_AR) crs "$(SYSROOT_LIB)/lib$${name}.a"; \
	407	done
dbfccac2 DG	408
dbfccac2 DG	409	#
320054e8	410	# Collect metadata on the sysroot and perform sanity checks.
dbfccac2	411	#
320054e8 DG	412	mkdir -p "$(SYSROOT_SHARE)"
	413
	414	# Collect symbol information.
	415	# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on
	416	# LLVM PR40497, which is fixed in 9.0, but not in 8.0.
	417	$(WASM_NM) --defined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/*.o \
fad009dc	418	\|grep ' [[:upper:]] ' \|sed 's/.* [[:upper:]] //' \|LC_ALL=C sort > "$(SYSROOT_SHARE)/defined-symbols.txt"
320054e8	419	for undef_sym in $$($(WASM_NM) --undefined-only "$(SYSROOT_LIB)"/.a "$(SYSROOT_LIB)"/.o \
fad009dc	420	\|grep ' U ' \|sed 's/.* U //' \|LC_ALL=C sort \|uniq); do \
320054e8 DG	421	grep -q '\<'$$undef_sym'\>' "$(SYSROOT_SHARE)/defined-symbols.txt" \|\| echo $$undef_sym; \
	422	done > "$(SYSROOT_SHARE)/undefined-symbols.txt"
	423	grep '^_*wasi_' "$(SYSROOT_SHARE)/undefined-symbols.txt" \
	424	> "$(SYSROOT_LIB)/libc.imports"
	425
	426	# Generate a test file that includes all public header files.
	427	cd "$(SYSROOT)" && \
	428	for header in $$(find include -type f -not -name mman.h \|grep -v /bits/); do \
	429	echo '#include <'$$header'>' \| sed 's/include\///' ; \
fad009dc	430	done \|LC_ALL=C sort >share/$(MULTIARCH_TRIPLE)/include-all.c ; \
320054e8 DG	431	cd - >/dev/null
	432
	433	# Test that it compiles.
	434	"$(WASM_CC)" $(WASM_CFLAGS) -fsyntax-only "$(SYSROOT_SHARE)/include-all.c" -Wno-\#warnings
	435
	436	# Collect all the predefined macros, except for compiler version macros
	437	# which we don't need to track here. For the ___ATOMIC__LOCK_FREE
	438	# macros, squash individual compiler names to attempt, toward keeping
	439	# these files compiler-independent.
	440	# TODO: Undefine __FLOAT128__ for now since it's not in clang 8.0.
f74124a6	441	# TODO: Filter out __FLT16_* for now, as not all versions of clang have these.
320054e8 DG	442	"$(WASM_CC)" $(WASM_CFLAGS) "$(SYSROOT_SHARE)/include-all.c" \
320054e8 DG	443	-E -dM -Wno-\#warnings \
9f0d8e85	444	-D_ALL_SOURCE \
320054e8 DG	445	-U__llvm__ \
	446	-U__clang__ \
	447	-U__clang_major__ \
	448	-U__clang_minor__ \
	449	-U__clang_patchlevel__ \
	450	-U__clang_version__ \
	451	-U__GNUC__ \
	452	-U__GNUC_MINOR__ \
	453	-U__GNUC_PATCHLEVEL__ \
	454	-U__VERSION__ \
	455	-U__FLOAT128__ \
	456	\| sed -e 's/__[[:upper:][:digit:]]_ATOMIC_\([[:upper:][:digit:]_]\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \
f74124a6	457	\| grep -v '^#define __FLT16_' \
320054e8 DG	458	> "$(SYSROOT_SHARE)/predefined-macros.txt"
	459
	460	#
	461	# The build succeeded! The generated sysroot is in $(SYSROOT).
	462	#
	463
	464	check: $(SYSROOT) finish
	465	# Check that the computed metadata matches the expected metadata.
	466	diff -ur "$(CURDIR)/expected/$(MULTIARCH_TRIPLE)" "$(SYSROOT_SHARE)"
	467
	468	install: $(SYSROOT)
	469	mkdir -p "$(INSTALL_DIR)"
	470	cp -r "$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)"
	471
	472	.PHONY: $(SYSROOT) default startup_files libc finish check install $(SYSROOT_INC)