diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 691 |
1 files changed, 691 insertions, 0 deletions
diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..37551cb --- /dev/null +++ b/Makefile @@ -0,0 +1,691 @@ +# These variables are specifically meant to be overridable via the make +# command-line. +# ?= doesn't work for CC and AR because make has a default value for them. +ifeq ($(origin CC), default) +CC := clang +endif +NM ?= $(patsubst %clang,%llvm-nm,$(filter-out ccache sccache,$(CC))) +ifeq ($(origin AR), default) +AR = $(patsubst %clang,%llvm-ar,$(filter-out ccache sccache,$(CC))) +endif +EXTRA_CFLAGS ?= -O2 -DNDEBUG +# 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; note that pthread support is still a work-in-progress. +THREAD_MODEL ?= single +# dlmalloc or none +MALLOC_IMPL ?= dlmalloc +# yes or no +BUILD_LIBC_TOP_HALF ?= yes +# The directory where we will store intermediate artifacts. +OBJDIR ?= $(CURDIR)/build + +# When the length is no larger than this threshold, we consider the +# overhead of bulk memory opcodes to outweigh the performance benefit, +# and fall back to the original musl implementation. See +# https://github.com/WebAssembly/wasi-libc/pull/263 for relevant +# discussion +BULK_MEMORY_THRESHOLD ?= 32 + +# Variables from this point on are not meant to be overridable via the +# make command-line. + +# 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 source tree. +DLMALLOC_DIR = $(CURDIR)/dlmalloc +DLMALLOC_SRC_DIR = $(DLMALLOC_DIR)/src +DLMALLOC_SOURCES = $(DLMALLOC_SRC_DIR)/dlmalloc.c +DLMALLOC_INC = $(DLMALLOC_DIR)/include +EMMALLOC_DIR = $(CURDIR)/emmalloc +EMMALLOC_SOURCES = $(EMMALLOC_DIR)/emmalloc.c +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_SOURCES = $(LIBC_BOTTOM_HALF_DIR)/sources +LIBC_BOTTOM_HALF_ALL_SOURCES = \ + $(sort \ + $(shell find $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) -name \*.c) \ + $(shell find $(LIBC_BOTTOM_HALF_SOURCES) -name \*.c)) + +# FIXME(https://reviews.llvm.org/D85567) - due to a bug in LLD the weak +# references to a function defined in `chdir.c` only work if `chdir.c` is at the +# end of the archive, but once that LLD review lands and propagates into LLVM +# then we don't have to do this. +LIBC_BOTTOM_HALF_ALL_SOURCES := $(filter-out $(LIBC_BOTTOM_HALF_SOURCES)/chdir.c,$(LIBC_BOTTOM_HALF_ALL_SOURCES)) +LIBC_BOTTOM_HALF_ALL_SOURCES := $(LIBC_BOTTOM_HALF_ALL_SOURCES) $(LIBC_BOTTOM_HALF_SOURCES)/chdir.c + +LIBWASI_EMULATED_MMAN_SOURCES = \ + $(sort $(shell find $(LIBC_BOTTOM_HALF_DIR)/mman -name \*.c)) +LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES = \ + $(sort $(shell find $(LIBC_BOTTOM_HALF_DIR)/clocks -name \*.c)) +LIBWASI_EMULATED_GETPID_SOURCES = \ + $(sort $(shell find $(LIBC_BOTTOM_HALF_DIR)/getpid -name \*.c)) +LIBWASI_EMULATED_SIGNAL_SOURCES = \ + $(sort $(shell find $(LIBC_BOTTOM_HALF_DIR)/signal -name \*.c)) +LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES = \ + $(LIBC_TOP_HALF_MUSL_SRC_DIR)/signal/psignal.c \ + $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/strsignal.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 = \ + $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR)/, \ + misc/a64l.c \ + misc/basename.c \ + misc/dirname.c \ + misc/ffs.c \ + misc/ffsl.c \ + misc/ffsll.c \ + misc/fmtmsg.c \ + misc/getdomainname.c \ + misc/gethostid.c \ + misc/getopt.c \ + misc/getopt_long.c \ + misc/getsubopt.c \ + misc/uname.c \ + misc/nftw.c \ + errno/strerror.c \ + network/htonl.c \ + network/htons.c \ + network/ntohl.c \ + network/ntohs.c \ + network/inet_ntop.c \ + network/inet_pton.c \ + network/inet_aton.c \ + network/in6addr_any.c \ + network/in6addr_loopback.c \ + fenv/fenv.c \ + fenv/fesetround.c \ + fenv/feupdateenv.c \ + fenv/fesetexceptflag.c \ + fenv/fegetexceptflag.c \ + fenv/feholdexcept.c \ + exit/exit.c \ + exit/atexit.c \ + exit/assert.c \ + exit/quick_exit.c \ + exit/at_quick_exit.c \ + time/strftime.c \ + time/asctime.c \ + time/asctime_r.c \ + time/ctime.c \ + time/ctime_r.c \ + time/wcsftime.c \ + time/strptime.c \ + time/difftime.c \ + time/timegm.c \ + time/ftime.c \ + time/gmtime.c \ + time/gmtime_r.c \ + time/timespec_get.c \ + time/getdate.c \ + time/localtime.c \ + time/localtime_r.c \ + time/mktime.c \ + time/__tm_to_secs.c \ + time/__month_to_secs.c \ + time/__secs_to_tm.c \ + time/__year_to_secs.c \ + time/__tz.c \ + fcntl/creat.c \ + dirent/alphasort.c \ + dirent/versionsort.c \ + env/__stack_chk_fail.c \ + env/clearenv.c \ + env/getenv.c \ + env/putenv.c \ + env/setenv.c \ + env/unsetenv.c \ + unistd/posix_close.c \ + stat/futimesat.c \ + legacy/getpagesize.c \ + thread/thrd_sleep.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 %/bind_textdomain_codeset.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) \ + $(filter-out %/__signbit.c %/__signbitf.c %/__signbitl.c \ + %/__fpclassify.c %/__fpclassifyf.c %/__fpclassifyl.c \ + %/ceilf.c %/ceil.c \ + %/floorf.c %/floor.c \ + %/truncf.c %/trunc.c \ + %/rintf.c %/rint.c \ + %/nearbyintf.c %/nearbyint.c \ + %/sqrtf.c %/sqrt.c \ + %/fabsf.c %/fabs.c \ + %/copysignf.c %/copysign.c \ + %/fminf.c %/fmaxf.c \ + %/fmin.c %/fmax.c, \ + $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/math/*.c)) \ + $(filter-out %/crealf.c %/creal.c %creall.c \ + %/cimagf.c %/cimag.c %cimagl.c, \ + $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/complex/*.c)) \ + $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/crypt/*.c) + +ifeq ($(THREAD_MODEL), posix) +LIBC_TOP_HALF_MUSL_SOURCES += \ + $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR)/, \ + env/__init_tls.c \ + stdio/__lockfile.c \ + thread/__lock.c \ + thread/__wait.c \ + thread/__timedwait.c \ + thread/default_attr.c \ + thread/pthread_attr_destroy.c \ + thread/pthread_attr_init.c \ + thread/pthread_attr_setstack.c \ + thread/pthread_attr_setstacksize.c \ + thread/pthread_cleanup_push.c \ + thread/pthread_cond_broadcast.c \ + thread/pthread_cond_destroy.c \ + thread/pthread_cond_init.c \ + thread/pthread_cond_signal.c \ + thread/pthread_cond_timedwait.c \ + thread/pthread_cond_wait.c \ + thread/pthread_condattr_destroy.c \ + thread/pthread_condattr_init.c \ + thread/pthread_condattr_setclock.c \ + thread/pthread_condattr_setpshared.c \ + thread/pthread_create.c \ + thread/pthread_getspecific.c \ + thread/pthread_join.c \ + thread/pthread_key_create.c \ + thread/pthread_mutex_consistent.c \ + thread/pthread_mutex_destroy.c \ + thread/pthread_mutex_init.c \ + thread/pthread_mutex_getprioceiling.c \ + thread/pthread_mutex_lock.c \ + thread/pthread_mutex_timedlock.c \ + thread/pthread_mutex_trylock.c \ + thread/pthread_mutex_unlock.c \ + thread/pthread_mutexattr_destroy.c \ + thread/pthread_mutexattr_init.c \ + thread/pthread_mutexattr_setprotocol.c \ + thread/pthread_mutexattr_setpshared.c \ + thread/pthread_mutexattr_setrobust.c \ + thread/pthread_mutexattr_settype.c \ + thread/pthread_once.c \ + thread/pthread_rwlock_destroy.c \ + thread/pthread_rwlock_init.c \ + thread/pthread_rwlock_rdlock.c \ + thread/pthread_rwlock_timedrdlock.c \ + thread/pthread_rwlock_timedwrlock.c \ + thread/pthread_rwlock_tryrdlock.c \ + thread/pthread_rwlock_trywrlock.c \ + thread/pthread_rwlock_unlock.c \ + thread/pthread_rwlock_wrlock.c \ + thread/pthread_rwlockattr_destroy.c \ + thread/pthread_rwlockattr_init.c \ + thread/pthread_rwlockattr_setpshared.c \ + thread/pthread_setcancelstate.c \ + thread/pthread_setspecific.c \ + thread/pthread_self.c \ + thread/pthread_testcancel.c \ + thread/sem_destroy.c \ + thread/sem_getvalue.c \ + thread/sem_init.c \ + thread/sem_post.c \ + thread/sem_timedwait.c \ + thread/sem_trywait.c \ + thread/sem_wait.c \ + ) +endif + +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 +BULK_MEMORY_SOURCES = \ + $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memcpy.c \ + $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memmove.c \ + $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memset.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) \ + $(sort $(shell find $(LIBC_TOP_HALF_SOURCES) -name \*.c)) + +# Add any extra flags +CFLAGS = $(EXTRA_CFLAGS) +# Set the target. +CFLAGS += --target=$(TARGET_TRIPLE) +# WebAssembly floating-point match doesn't trap. +# TODO: Add -fno-signaling-nans when the compiler supports it. +CFLAGS += -fno-trapping-math +# Add all warnings, but disable a few which occur in third-party code. +CFLAGS += -Wall -Wextra -Werror \ + -Wno-null-pointer-arithmetic \ + -Wno-unused-parameter \ + -Wno-sign-compare \ + -Wno-unused-variable \ + -Wno-unused-function \ + -Wno-ignored-attributes \ + -Wno-missing-braces \ + -Wno-ignored-pragmas \ + -Wno-unused-but-set-variable \ + -Wno-unknown-warning-option + +# Configure support for threads. +ifeq ($(THREAD_MODEL), single) +CFLAGS += -mthread-model single +endif +ifeq ($(THREAD_MODEL), posix) +# Specify the tls-model until LLVM 15 is released (which should contain +# https://reviews.llvm.org/D130053). +CFLAGS += -mthread-model posix -pthread -ftls-model=local-exec + +# Include cloudlib's directory to access the structure definition of clockid_t +CFLAGS += -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) +endif + +# Expose the public headers to the implementation. We use `-isystem` for +# purpose for two reasons: +# +# 1. It only does `<...>` not `"...."` lookup. We are making a libc, +# which is a system library, so all public headers should be +# accessible via `<...>` and never also need `"..."`. `-isystem` main +# purpose is to only effect `<...>` lookup. +# +# 2. The `-I` for private headers added for specific C files below +# should come earlier in the search path, so they can "override" +# and/or `#include_next` the public headers. `-isystem` (like +# `-idirafter`) comes later in the search path than `-I`. +CFLAGS += -isystem "$(SYSROOT_INC)" + +# These variables describe the locations of various files and directories in +# the build tree. +objs = $(patsubst $(CURDIR)/%.c,$(OBJDIR)/%.o,$(1)) +DLMALLOC_OBJS = $(call objs,$(DLMALLOC_SOURCES)) +EMMALLOC_OBJS = $(call objs,$(EMMALLOC_SOURCES)) +LIBC_BOTTOM_HALF_ALL_OBJS = $(call objs,$(LIBC_BOTTOM_HALF_ALL_SOURCES)) +LIBC_TOP_HALF_ALL_OBJS = $(call objs,$(LIBC_TOP_HALF_ALL_SOURCES)) +ifeq ($(MALLOC_IMPL),dlmalloc) +LIBC_OBJS += $(DLMALLOC_OBJS) +else ifeq ($(MALLOC_IMPL),emmalloc) +LIBC_OBJS += $(EMMALLOC_OBJS) +else ifeq ($(MALLOC_IMPL),none) +# No object files to add. +else +$(error unknown malloc implementation $(MALLOC_IMPL)) +endif +# Add libc-bottom-half's objects. +LIBC_OBJS += $(LIBC_BOTTOM_HALF_ALL_OBJS) +ifeq ($(BUILD_LIBC_TOP_HALF),yes) +# libc-top-half is musl. +LIBC_OBJS += $(LIBC_TOP_HALF_ALL_OBJS) +endif +MUSL_PRINTSCAN_OBJS = $(call objs,$(MUSL_PRINTSCAN_SOURCES)) +MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS)) +MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS)) +BULK_MEMORY_OBJS = $(call objs,$(BULK_MEMORY_SOURCES)) +LIBWASI_EMULATED_MMAN_OBJS = $(call objs,$(LIBWASI_EMULATED_MMAN_SOURCES)) +LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS = $(call objs,$(LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES)) +LIBWASI_EMULATED_GETPID_OBJS = $(call objs,$(LIBWASI_EMULATED_GETPID_SOURCES)) +LIBWASI_EMULATED_SIGNAL_OBJS = $(call objs,$(LIBWASI_EMULATED_SIGNAL_SOURCES)) +LIBWASI_EMULATED_SIGNAL_MUSL_OBJS = $(call objs,$(LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES)) + +# 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) + +# Files from musl's include directory that we don't want to install in the +# sysroot's include directory. +MUSL_OMIT_HEADERS := + +# Remove files which aren't headers (we generate alltypes.h below). +MUSL_OMIT_HEADERS += \ + "bits/syscall.h.in" \ + "bits/alltypes.h.in" \ + "alltypes.h.in" + +# Use the compiler's version of these headers. +MUSL_OMIT_HEADERS += \ + "stdarg.h" \ + "stddef.h" + +# Use the WASI errno definitions. +MUSL_OMIT_HEADERS += \ + "bits/errno.h" + +# Remove headers that aren't supported yet or that aren't relevant for WASI. +MUSL_OMIT_HEADERS += \ + "sys/procfs.h" \ + "sys/user.h" \ + "sys/kd.h" "sys/vt.h" "sys/soundcard.h" "sys/sem.h" \ + "sys/shm.h" "sys/msg.h" "sys/ipc.h" "sys/ptrace.h" \ + "sys/statfs.h" \ + "bits/kd.h" "bits/vt.h" "bits/soundcard.h" "bits/sem.h" \ + "bits/shm.h" "bits/msg.h" "bits/ipc.h" "bits/ptrace.h" \ + "bits/statfs.h" \ + "sys/vfs.h" \ + "sys/statvfs.h" \ + "syslog.h" "sys/syslog.h" \ + "wait.h" "sys/wait.h" \ + "ucontext.h" "sys/ucontext.h" \ + "paths.h" \ + "utmp.h" "utmpx.h" \ + "lastlog.h" \ + "sys/acct.h" \ + "sys/cachectl.h" \ + "sys/epoll.h" "sys/reboot.h" "sys/swap.h" \ + "sys/sendfile.h" "sys/inotify.h" \ + "sys/quota.h" \ + "sys/klog.h" \ + "sys/fsuid.h" \ + "sys/io.h" \ + "sys/prctl.h" \ + "sys/mtio.h" \ + "sys/mount.h" \ + "sys/fanotify.h" \ + "sys/personality.h" \ + "elf.h" "link.h" "bits/link.h" \ + "scsi/scsi.h" "scsi/scsi_ioctl.h" "scsi/sg.h" \ + "sys/auxv.h" \ + "pwd.h" "shadow.h" "grp.h" \ + "mntent.h" \ + "netdb.h" \ + "resolv.h" \ + "pty.h" \ + "dlfcn.h" \ + "setjmp.h" \ + "ulimit.h" \ + "sys/xattr.h" \ + "wordexp.h" \ + "spawn.h" \ + "sys/membarrier.h" \ + "sys/signalfd.h" \ + "termios.h" \ + "sys/termios.h" \ + "bits/termios.h" \ + "net/if.h" \ + "net/if_arp.h" \ + "net/ethernet.h" \ + "net/route.h" \ + "netinet/if_ether.h" \ + "netinet/ether.h" \ + "sys/timerfd.h" \ + "libintl.h" \ + "sys/sysmacros.h" \ + "aio.h" + +ifeq ($(THREAD_MODEL), single) +# Remove headers not supported in single-threaded mode. +MUSL_OMIT_HEADERS += "pthread.h" +endif + +default: finish + +$(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: $(LIBWASI_EMULATED_MMAN_OBJS) + +$(SYSROOT_LIB)/libwasi-emulated-process-clocks.a: $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS) + +$(SYSROOT_LIB)/libwasi-emulated-getpid.a: $(LIBWASI_EMULATED_GETPID_OBJS) + +$(SYSROOT_LIB)/libwasi-emulated-signal.a: $(LIBWASI_EMULATED_SIGNAL_OBJS) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS) + +%.a: + @mkdir -p "$(@D)" + # On Windows, the commandline for the ar invocation got too long, so it needs to be split up. + $(AR) crs $@ $(wordlist 1, 199, $^) + $(AR) crs $@ $(wordlist 200, 399, $^) + $(AR) crs $@ $(wordlist 400, 599, $^) + $(AR) crs $@ $(wordlist 600, 799, $^) + # This might eventually overflow again, but at least it'll do so in a loud way instead of + # silently dropping the tail. + $(AR) crs $@ $(wordlist 800, 100000, $^) + +$(MUSL_PRINTSCAN_OBJS): CFLAGS += \ + -D__wasilibc_printscan_no_long_double \ + -D__wasilibc_printscan_full_support_option="\"add -lc-printscan-long-double to the link command\"" + +$(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): CFLAGS += \ + -D__wasilibc_printscan_no_floating_point \ + -D__wasilibc_printscan_floating_point_support_option="\"remove -lc-printscan-no-floating-point from the link command\"" + +# TODO: apply -mbulk-memory globally, once +# https://github.com/llvm/llvm-project/issues/52618 is resolved +$(BULK_MEMORY_OBJS): CFLAGS += \ + -mbulk-memory + +$(BULK_MEMORY_OBJS): CFLAGS += \ + -DBULK_MEMORY_THRESHOLD=$(BULK_MEMORY_THRESHOLD) + +$(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS): CFLAGS += \ + -D_WASI_EMULATED_SIGNAL + +$(OBJDIR)/%.long-double.o: $(CURDIR)/%.c include_dirs + @mkdir -p "$(@D)" + $(CC) $(CFLAGS) -MD -MP -o $@ -c $< + +$(OBJDIR)/%.no-floating-point.o: $(CURDIR)/%.c include_dirs + @mkdir -p "$(@D)" + $(CC) $(CFLAGS) -MD -MP -o $@ -c $< + +$(OBJDIR)/%.o: $(CURDIR)/%.c include_dirs + @mkdir -p "$(@D)" + $(CC) $(CFLAGS) -MD -MP -o $@ -c $< + +-include $(shell find $(OBJDIR) -name \*.d) + +$(DLMALLOC_OBJS): CFLAGS += \ + -I$(DLMALLOC_INC) + +startup_files $(LIBC_BOTTOM_HALF_ALL_OBJS): CFLAGS += \ + -I$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE) \ + -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC) \ + -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) \ + -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/include \ + -I$(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal + +$(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS): CFLAGS += \ + -I$(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 + +$(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS): CFLAGS += \ + -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) + +include_dirs: + # + # Install the include files. + # + mkdir -p "$(SYSROOT_INC)" + cp -r "$(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 selected header files. + $(RM) $(patsubst %,$(SYSROOT_INC)/%,$(MUSL_OMIT_HEADERS)) + +startup_files: include_dirs + # + # Build the startup files. + # + @mkdir -p "$(OBJDIR)" + cd "$(OBJDIR)" && \ + $(CC) $(CFLAGS) -c $(LIBC_BOTTOM_HALF_CRT_SOURCES) -MD -MP && \ + mkdir -p "$(SYSROOT_LIB)" && \ + mv *.o "$(SYSROOT_LIB)" + +libc: include_dirs \ + $(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 \ + $(SYSROOT_LIB)/libwasi-emulated-process-clocks.a \ + $(SYSROOT_LIB)/libwasi-emulated-getpid.a \ + $(SYSROOT_LIB)/libwasi-emulated-signal.a + +finish: startup_files libc + # + # Create empty placeholder libraries. + # + for name in m rt pthread crypt util xnet resolv dl; do \ + $(AR) crs "$(SYSROOT_LIB)/lib$${name}.a"; \ + done + + # + # The build succeeded! The generated sysroot is in $(SYSROOT). + # + +# The check for defined and undefined symbols expects there to be a heap +# alloctor (providing malloc, calloc, free, etc). Skip this step if the build +# is done without a malloc implementation. +ifneq ($(MALLOC_IMPL),none) +finish: check-symbols +endif + +DEFINED_SYMBOLS = $(SYSROOT_SHARE)/defined-symbols.txt +UNDEFINED_SYMBOLS = $(SYSROOT_SHARE)/undefined-symbols.txt + +check-symbols: startup_files libc + # + # Collect metadata on the sysroot and perform sanity checks. + # + mkdir -p "$(SYSROOT_SHARE)" + + # + # Collect symbol information. + # + @# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on + @# LLVM PR40497, which is fixed in 9.0, but not in 8.0. + @# Ignore certain llvm builtin symbols such as those starting with __mul + @# since these dependencies can vary between llvm versions. + "$(NM)" --defined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/libwasi-emulated-*.a "$(SYSROOT_LIB)"/*.o \ + |grep ' [[:upper:]] ' |sed 's/.* [[:upper:]] //' |LC_ALL=C sort |uniq > "$(DEFINED_SYMBOLS)" + for undef_sym in $$("$(NM)" --undefined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/libc-*.a "$(SYSROOT_LIB)"/*.o \ + |grep ' U ' |sed 's/.* U //' |LC_ALL=C sort |uniq); do \ + grep -q '\<'$$undef_sym'\>' "$(DEFINED_SYMBOLS)" || echo $$undef_sym; \ + done | grep -v "^__mul" > "$(UNDEFINED_SYMBOLS)" + grep '^_*imported_wasi_' "$(UNDEFINED_SYMBOLS)" \ + > "$(SYSROOT_LIB)/libc.imports" + + # + # Generate a test file that includes all public C header files. + # + cd "$(SYSROOT_INC)" && \ + for header in $$(find . -type f -not -name mman.h -not -name signal.h -not -name times.h -not -name resource.h |grep -v /bits/ |grep -v /c++/); do \ + echo '#include <'$$header'>' | sed 's/\.\///' ; \ + done |LC_ALL=C sort >$(SYSROOT_SHARE)/include-all.c ; \ + cd - >/dev/null + + # + # Test that it compiles. + # + $(CC) $(CFLAGS) -fsyntax-only "$(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. + @# + @# We have to add `-isystem $(SYSROOT_INC)` because otherwise clang puts + @# its builtin include path first, which produces compiler-specific + @# output. + @# + @# 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. + @# TODO: Filter out __NO_MATH_ERRNO_ and a few __*WIDTH__ that are new to clang 14. + @# TODO: clang defined __FLT_EVAL_METHOD__ until clang 15, so we force-undefine it + @# for older versions. + $(CC) $(CFLAGS) "$(SYSROOT_SHARE)/include-all.c" \ + -isystem $(SYSROOT_INC) \ + -std=gnu17 \ + -E -dM -Wno-\#warnings \ + -D_ALL_SOURCE \ + -U__llvm__ \ + -U__clang__ \ + -U__clang_major__ \ + -U__clang_minor__ \ + -U__clang_patchlevel__ \ + -U__clang_version__ \ + -U__clang_literal_encoding__ \ + -U__clang_wide_literal_encoding__ \ + -U__GNUC__ \ + -U__GNUC_MINOR__ \ + -U__GNUC_PATCHLEVEL__ \ + -U__VERSION__ \ + -U__FLOAT128__ \ + -U__NO_MATH_ERRNO__ \ + -U__BITINT_MAXWIDTH__ \ + -U__FLT_EVAL_METHOD__ -Wno-builtin-macro-redefined \ + | sed -e 's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \ + | grep -v '^#define __FLT16_' \ + | grep -v '^#define __\(BOOL\|INT_\(LEAST\|FAST\)\(8\|16\|32\|64\)\|INT\|LONG\|LLONG\|SHRT\)_WIDTH__' \ + > "$(SYSROOT_SHARE)/predefined-macros.txt" + + # Check that the computed metadata matches the expected metadata. + # This ignores whitespace because on Windows the output has CRLF line endings. + diff -wur "$(CURDIR)/expected/$(MULTIARCH_TRIPLE)/$(THREAD_MODEL)" "$(SYSROOT_SHARE)" + +install: finish + mkdir -p "$(INSTALL_DIR)" + cp -r "$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)" + +clean: + $(RM) -r "$(OBJDIR)" + $(RM) -r "$(SYSROOT)" + +.PHONY: default startup_files libc finish install include_dirs clean |