X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=Makefile;h=98aa995bc124269057925838a534e14f8d2e33e5;hb=63e4489d01ad0262d995c6d9a5f1a1bab719c917;hp=d58eb9b2c1b71db9b69c81cb3c4ef3df8f77dcfd;hpb=16450763ebbc5b5c582d3c5bfefc1c377e2fb3ce;p=wasi-libc.git diff --git a/Makefile b/Makefile index d58eb9b..98aa995 100644 --- a/Makefile +++ b/Makefile @@ -1,40 +1,32 @@ -# 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 +# These variables are specifically meant to be overridable via the make +# command-line. +CC ?= clang +NM ?= $(patsubst %clang,%llvm-nm,$(filter-out ccache sccache,$(CC))) +AR ?= $(patsubst %clang,%llvm-ar,$(filter-out ccache sccache,$(CC))) +EXTRA_CFLAGS ?= -O2 -DNDEBUG # The directory where we build the sysroot. -SYSROOT = $(CURDIR)/sysroot +SYSROOT ?= $(CURDIR)/sysroot # A directory to install to for "make install". -INSTALL_DIR = /usr/local +INSTALL_DIR ?= /usr/local # single or posix -THREAD_MODEL = single +THREAD_MODEL ?= single +# dlmalloc or none +MALLOC_IMPL ?= dlmalloc # yes or no -BUILD_DLMALLOC = yes -BUILD_LIBC_BOTTOM_HALF = yes -BUILD_LIBC_TOP_HALF = yes +BUILD_LIBC_TOP_HALF ?= yes # The directory where we're store intermediate artifacts. -OBJDIR = $(CURDIR)/build +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 +# Variables from this point on are not meant to be overridable via the +# make command-line. -# 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) +# 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 @@ -44,89 +36,104 @@ 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) + +# 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 = \ $(shell find $(LIBC_BOTTOM_HALF_DIR)/mman -name \*.c) +LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES = \ + $(shell find $(LIBC_BOTTOM_HALF_DIR)/clocks -name \*.c) +LIBWASI_EMULATED_GETPID_SOURCES = \ + $(shell find $(LIBC_BOTTOM_HALF_DIR)/getpid -name \*.c) +LIBWASI_EMULATED_SIGNAL_SOURCES = \ + $(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 = \ - $(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)/network/inet_ntop.c \ - $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/inet_pton.c \ - $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/inet_aton.c \ - $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/in6addr_any.c \ - $(LIBC_TOP_HALF_MUSL_SRC_DIR)/network/in6addr_loopback.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)/fenv/feupdateenv.c \ - $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fesetexceptflag.c \ - $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/fegetexceptflag.c \ - $(LIBC_TOP_HALF_MUSL_SRC_DIR)/fenv/feholdexcept.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.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 \ + $(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/clearenv.c \ + env/getenv.c \ + env/putenv.c \ + env/setenv.c \ + env/unsetenv.c \ + unistd/posix_close.c \ + stat/futimesat.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 \ @@ -138,7 +145,7 @@ LIBC_TOP_HALF_MUSL_SOURCES = \ $(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, \ + $(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) \ @@ -156,9 +163,13 @@ LIBC_TOP_HALF_MUSL_SOURCES = \ %/nearbyintf.c %/nearbyint.c \ %/sqrtf.c %/sqrt.c \ %/fabsf.c %/fabs.c \ - %/copysignf.c %/copysign.c, \ + %/copysignf.c %/copysign.c \ + %/fminf.c %/fmaxf.c \ + %/fmin.c %/fmax.c, \ $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/math/*.c)) \ - $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/complex/*.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) MUSL_PRINTSCAN_SOURCES = \ $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/floatscan.c \ @@ -173,65 +184,167 @@ 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) - +# Add any extra flags +CFLAGS = $(EXTRA_CFLAGS) # Set the target. -override WASM_CFLAGS += --target=$(TARGET_TRIPLE) -# We're compiling libc. -override WASM_CFLAGS += -fno-builtin +CFLAGS += --target=$(TARGET_TRIPLE) # WebAssembly floating-point match doesn't trap. # TODO: Add -fno-signaling-nans when the compiler supports it. -override WASM_CFLAGS += -fno-trapping-math +CFLAGS += -fno-trapping-math +# Add all warnings, but disable a few which occur in third-party code. +CFLAGS += -Wall -Wextra -Werror \ + -Wno-null-pointer-arithmetic \ + -Wno-unused-parameter \ + -Wno-sign-compare \ + -Wno-unused-variable \ + -Wno-unused-function \ + -Wno-ignored-attributes \ + -Wno-missing-braces \ + -Wno-ignored-pragmas \ + -Wno-unused-but-set-variable \ + -Wno-unknown-warning-option # Configure support for threads. ifeq ($(THREAD_MODEL), single) -override WASM_CFLAGS += -mthread-model single +CFLAGS += -mthread-model single endif ifeq ($(THREAD_MODEL), posix) -override WASM_CFLAGS += -mthread-model posix -pthread +CFLAGS += -mthread-model posix -pthread endif -# Set the sysroot. -override WASM_CFLAGS += --sysroot="$(SYSROOT)" - +# 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)) -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) +DLMALLOC_OBJS = $(call objs,$(DLMALLOC_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),none) +# No object files to add. +else +$(error unknown malloc implementation $(MALLOC_IMPL)) endif -ifeq ($(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 +LIBC_OBJS += $(LIBC_BOTTOM_HALF_ALL_OBJS) ifeq ($(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) +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)) +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" + +ifeq ($(THREAD_MODEL), single) +# Remove headers not supported in single-threaded mode. +MUSL_OMIT_HEADERS += "aio.h" "pthread.h" 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 +default: finish $(SYSROOT_LIB)/libc.a: $(LIBC_OBJS) @@ -241,43 +354,57 @@ $(SYSROOT_LIB)/libc-printscan-no-floating-point.a: $(MUSL_PRINTSCAN_NO_FLOATING_ $(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)" - $(WASM_AR) crs $@ $^ - -$(MUSL_PRINTSCAN_OBJS): override WASM_CFLAGS += \ + # 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\"" -$(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \ +$(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\"" +$(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS): CFLAGS += \ + -D_WASI_EMULATED_SIGNAL + $(OBJDIR)/%.long-double.o: $(CURDIR)/%.c include_dirs @mkdir -p "$(@D)" - "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $< + $(CC) $(CFLAGS) -MD -MP -o $@ -c $< $(OBJDIR)/%.no-floating-point.o: $(CURDIR)/%.c include_dirs @mkdir -p "$(@D)" - "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $< + $(CC) $(CFLAGS) -MD -MP -o $@ -c $< $(OBJDIR)/%.o: $(CURDIR)/%.c include_dirs @mkdir -p "$(@D)" - "$(WASM_CC)" $(WASM_CFLAGS) -MD -MP -o $@ -c $< + $(CC) $(CFLAGS) -MD -MP -o $@ -c $< -include $(shell find $(OBJDIR) -name \*.d) /dev/null +-include $(shell find $(OBJDIR) -name \*.d) -$(DLMALLOC_OBJS): override WASM_CFLAGS += \ +$(DLMALLOC_OBJS): CFLAGS += \ -I$(DLMALLOC_INC) -$(LIBC_BOTTOM_HALF_ALL_OBJS): override WASM_CFLAGS += \ +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$(LIBC_BOTTOM_HALF_LIBPREOPEN_LIB) \ - -I$(LIBC_BOTTOM_HALF_LIBPREOPEN_INC) + -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) -$(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS): override WASM_CFLAGS += \ +$(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 \ @@ -291,14 +418,14 @@ $(LIBC_TOP_HALF_ALL_OBJS) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS) $(MUSL_PRINTSCAN_NO -Wno-dangling-else \ -Wno-unknown-pragmas -include_dirs: - $(RM) -r "$(SYSROOT)" +$(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS): CFLAGS += \ + -I$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC) +include_dirs: # # Install the include files. # mkdir -p "$(SYSROOT_INC)" - cp -r "$(BASICS_INC)" "$(SYSROOT)" cp -r "$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)" # Generate musl's bits/alltypes.h header. @@ -314,101 +441,8 @@ include_dirs: cp -r "$(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" \ - "$(SYSROOT_INC)/sys/signalfd.h" \ - "$(SYSROOT_INC)/termios.h" \ - "$(SYSROOT_INC)/sys/termios.h" \ - "$(SYSROOT_INC)/bits/termios.h" \ - "$(SYSROOT_INC)/net/if.h" \ - "$(SYSROOT_INC)/net/if_arp.h" \ - "$(SYSROOT_INC)/net/ethernet.h" \ - "$(SYSROOT_INC)/net/route.h" \ - "$(SYSROOT_INC)/netinet/if_ether.h" \ - "$(SYSROOT_INC)/netinet/ether.h" \ - "$(SYSROOT_INC)/sys/timerfd.h" -ifeq ($(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 + # Remove selected header files. + $(RM) $(patsubst %,$(SYSROOT_INC)/%,$(MUSL_OMIT_HEADERS)) startup_files: include_dirs # @@ -416,7 +450,7 @@ startup_files: include_dirs # @mkdir -p "$(OBJDIR)" cd "$(OBJDIR)" && \ - "$(WASM_CC)" $(WASM_CFLAGS) -c $(CRT_SOURCES) -MD -MP && \ + $(CC) $(CFLAGS) -c $(LIBC_BOTTOM_HALF_CRT_SOURCES) -MD -MP && \ mkdir -p "$(SYSROOT_LIB)" && \ mv *.o "$(SYSROOT_LIB)" @@ -424,50 +458,89 @@ 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-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 \ - $(WASM_AR) crs "$(SYSROOT_LIB)/lib$${name}.a"; \ + $(AR) crs "$(SYSROOT_LIB)/lib$${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. - $(WASM_NM) --defined-only "$(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 $$($(WASM_NM) --undefined-only "$(SYSROOT_LIB)"/*.a "$(SYSROOT_LIB)"/*.o \ + # + @# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on + @# LLVM PR40497, which is fixed in 9.0, but not in 8.0. + @# Ignore certain llvm builtin symbols such as those starting with __mul + @# since these dependencies can vary between llvm versions. + "$(NM)" --defined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/libwasi-emulated-*.a "$(SYSROOT_LIB)"/*.o \ + |grep ' [[:upper:]] ' |sed 's/.* [[:upper:]] //' |LC_ALL=C sort > "$(DEFINED_SYMBOLS)" + for undef_sym in $$("$(NM)" --undefined-only "$(SYSROOT_LIB)"/libc.a "$(SYSROOT_LIB)"/libc-*.a "$(SYSROOT_LIB)"/*.o \ |grep ' U ' |sed 's/.* U //' |LC_ALL=C sort |uniq); do \ - grep -q '\<'$$undef_sym'\>' "$(SYSROOT_SHARE)/defined-symbols.txt" || echo $$undef_sym; \ - done > "$(SYSROOT_SHARE)/undefined-symbols.txt" - grep '^_*wasi_' "$(SYSROOT_SHARE)/undefined-symbols.txt" \ + grep -q '\<'$$undef_sym'\>' "$(DEFINED_SYMBOLS)" || echo $$undef_sym; \ + done | grep -v "^__mul" > "$(UNDEFINED_SYMBOLS)" + grep '^_*imported_wasi_' "$(UNDEFINED_SYMBOLS)" \ > "$(SYSROOT_LIB)/libc.imports" + # # Generate a test file that includes all public header files. - cd "$(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/$(MULTIARCH_TRIPLE)/include-all.c ; \ + # + cd "$(SYSROOT_INC)" && \ + for header in $$(find . -type f -not -name mman.h -not -name signal.h -not -name times.h -not -name resource.h |grep -v /bits/); do \ + echo '#include <'$$header'>' | sed 's/\.\///' ; \ + done |LC_ALL=C sort >$(SYSROOT_SHARE)/include-all.c ; \ cd - >/dev/null + # # Test that it compiles. - "$(WASM_CC)" $(WASM_CFLAGS) -fsyntax-only "$(SYSROOT_SHARE)/include-all.c" -Wno-\#warnings + # + $(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. - # 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" \ + # 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__ \ @@ -476,25 +549,31 @@ finish: startup_files libc -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" - # - # The build succeeded! The generated sysroot is in $(SYSROOT). - # - -check: finish # Check that the computed metadata matches the expected metadata. - diff -ur "$(CURDIR)/expected/$(MULTIARCH_TRIPLE)" "$(SYSROOT_SHARE)" + # This ignores whitespace because on Windows the output has CRLF line endings. + diff -wur "$(CURDIR)/expected/$(MULTIARCH_TRIPLE)" "$(SYSROOT_SHARE)" install: finish mkdir -p "$(INSTALL_DIR)" cp -r "$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)" -.PHONY: default startup_files libc finish check install include_dirs +clean: + $(RM) -r "$(OBJDIR)" + $(RM) -r "$(SYSROOT)" + +.PHONY: default startup_files libc finish install include_dirs clean