1 # These variables are specifically meant to be overridable via the make
3 # ?= doesn't work for CC and AR because make has a default value for them.
4 ifeq ($(origin CC
), default
)
7 NM ?
= $(patsubst %clang
,%llvm-nm
,$(filter-out ccache sccache
,$(CC
)))
8 ifeq ($(origin AR
), default
)
9 AR
= $(patsubst %clang
,%llvm-ar
,$(filter-out ccache sccache
,$(CC
)))
11 EXTRA_CFLAGS ?
= -O2
-DNDEBUG
12 # The directory where we build the sysroot.
13 SYSROOT ?
= $(CURDIR
)/sysroot
14 # A directory to install to for "make install".
15 INSTALL_DIR ?
= /usr
/local
17 THREAD_MODEL ?
= single
19 MALLOC_IMPL ?
= dlmalloc
21 BUILD_LIBC_TOP_HALF ?
= yes
22 # The directory where we're store intermediate artifacts.
23 OBJDIR ?
= $(CURDIR
)/build
25 # When the length is no larger than this threshold, we consider the
26 # overhead of bulk memory opcodes to outweigh the performance benefit,
27 # and fall back to the original musl implementation. See
28 # https://github.com/WebAssembly/wasi-libc/pull/263 for relevant
30 BULK_MEMORY_THRESHOLD ?
= 32
32 # Variables from this point on are not meant to be overridable via the
35 # Set the target variables. Multiarch triples notably omit the vendor field,
36 # which happens to be what we do for the main target triple too.
37 TARGET_TRIPLE
= wasm32-wasi
38 MULTIARCH_TRIPLE
= wasm32-wasi
40 # These variables describe the locations of various files and directories in
42 DLMALLOC_DIR
= $(CURDIR
)/dlmalloc
43 DLMALLOC_SRC_DIR
= $(DLMALLOC_DIR
)/src
44 DLMALLOC_SOURCES
= $(DLMALLOC_SRC_DIR
)/dlmalloc.c
45 DLMALLOC_INC
= $(DLMALLOC_DIR
)/include
46 LIBC_BOTTOM_HALF_DIR
= $(CURDIR
)/libc-bottom-half
47 LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
= $(LIBC_BOTTOM_HALF_DIR
)/cloudlibc
/src
48 LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC
= $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)/include
49 LIBC_BOTTOM_HALF_HEADERS_PUBLIC
= $(LIBC_BOTTOM_HALF_DIR
)/headers
/public
50 LIBC_BOTTOM_HALF_HEADERS_PRIVATE
= $(LIBC_BOTTOM_HALF_DIR
)/headers
/private
51 LIBC_BOTTOM_HALF_SOURCES
= $(LIBC_BOTTOM_HALF_DIR
)/sources
52 LIBC_BOTTOM_HALF_ALL_SOURCES
= \
54 $(shell find
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
) -name \
*.c
) \
55 $(shell find
$(LIBC_BOTTOM_HALF_SOURCES
) -name \
*.c
))
57 # FIXME(https://reviews.llvm.org/D85567) - due to a bug in LLD the weak
58 # references to a function defined in `chdir.c` only work if `chdir.c` is at the
59 # end of the archive, but once that LLD review lands and propagates into LLVM
60 # then we don't have to do this.
61 LIBC_BOTTOM_HALF_ALL_SOURCES
:= $(filter-out $(LIBC_BOTTOM_HALF_SOURCES
)/chdir.c
,$(LIBC_BOTTOM_HALF_ALL_SOURCES
))
62 LIBC_BOTTOM_HALF_ALL_SOURCES
:= $(LIBC_BOTTOM_HALF_ALL_SOURCES
) $(LIBC_BOTTOM_HALF_SOURCES
)/chdir.c
64 LIBWASI_EMULATED_MMAN_SOURCES
= \
65 $(sort $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/mman
-name \
*.c
))
66 LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES
= \
67 $(sort $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/clocks
-name \
*.c
))
68 LIBWASI_EMULATED_GETPID_SOURCES
= \
69 $(sort $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/getpid
-name \
*.c
))
70 LIBWASI_EMULATED_SIGNAL_SOURCES
= \
71 $(sort $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/signal
-name \
*.c
))
72 LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES
= \
73 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/signal
/psignal.c \
74 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/strsignal.c
75 LIBC_BOTTOM_HALF_CRT_SOURCES
= $(wildcard $(LIBC_BOTTOM_HALF_DIR
)/crt
/*.c
)
76 LIBC_TOP_HALF_DIR
= $(CURDIR
)/libc-top-half
77 LIBC_TOP_HALF_MUSL_DIR
= $(LIBC_TOP_HALF_DIR
)/musl
78 LIBC_TOP_HALF_MUSL_SRC_DIR
= $(LIBC_TOP_HALF_MUSL_DIR
)/src
79 LIBC_TOP_HALF_MUSL_INC
= $(LIBC_TOP_HALF_MUSL_DIR
)/include
80 LIBC_TOP_HALF_MUSL_SOURCES
= \
81 $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/, \
89 misc
/getdomainname.c \
101 network
/inet_ntop.c \
102 network
/inet_pton.c \
103 network
/inet_aton.c \
104 network
/in6addr_any.c \
105 network
/in6addr_loopback.c \
109 fenv
/fesetexceptflag.c \
110 fenv
/fegetexceptflag.c \
111 fenv
/feholdexcept.c \
116 exit
/at_quick_exit.c \
129 time
/timespec_get.c \
134 time
/__tm_to_secs.c \
135 time
/__month_to_secs.c \
136 time
/__secs_to_tm.c \
137 time
/__year_to_secs.c \
141 dirent
/versionsort.c \
147 unistd
/posix_close.c \
149 legacy
/getpagesize.c \
151 $(filter-out %/procfdname.c
%/syscall.c
%/syscall_ret.c
%/vdso.c
%/version.c
, \
152 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal
/*.c
)) \
153 $(filter-out %/flockfile.c
%/funlockfile.c
%/__lockfile.c
%/ftrylockfile.c \
155 %/tmpnam.c
%/tmpfile.c
%/tempnam.c \
156 %/popen.c
%/pclose.c \
159 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/*.c
)) \
160 $(filter-out %/strsignal.c
, \
161 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/*.c
)) \
162 $(filter-out %/dcngettext.c
%/textdomain.c
%/bind_textdomain_codeset.c
, \
163 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/locale
/*.c
)) \
164 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/*.c
) \
165 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/search
/*.c
) \
166 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/multibyte
/*.c
) \
167 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/regex
/*.c
) \
168 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/prng
/*.c
) \
169 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/conf
/*.c
) \
170 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/ctype
/*.c
) \
171 $(filter-out %/__signbit.c
%/__signbitf.c
%/__signbitl.c \
172 %/__fpclassify.c
%/__fpclassifyf.c
%/__fpclassifyl.c \
174 %/floorf.c
%/floor.c \
175 %/truncf.c
%/trunc.c \
177 %/nearbyintf.c
%/nearbyint.c \
180 %/copysignf.c
%/copysign.c \
181 %/fminf.c
%/fmaxf.c \
183 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/math
/*.c
)) \
184 $(filter-out %/crealf.c
%/creal.c
%creall.c \
185 %/cimagf.c
%/cimag.c
%cimagl.c
, \
186 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/complex
/*.c
)) \
187 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/crypt
/*.c
)
188 MUSL_PRINTSCAN_SOURCES
= \
189 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal
/floatscan.c \
190 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfprintf.c \
191 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfwprintf.c \
192 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfscanf.c \
193 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/strtod.c \
194 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/wcstod.c
195 BULK_MEMORY_SOURCES
= \
196 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/memcpy.c \
197 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/memmove.c \
198 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/memset.c
199 LIBC_TOP_HALF_HEADERS_PRIVATE
= $(LIBC_TOP_HALF_DIR
)/headers
/private
200 LIBC_TOP_HALF_SOURCES
= $(LIBC_TOP_HALF_DIR
)/sources
201 LIBC_TOP_HALF_ALL_SOURCES
= \
202 $(LIBC_TOP_HALF_MUSL_SOURCES
) \
203 $(sort $(shell find
$(LIBC_TOP_HALF_SOURCES
) -name \
*.c
))
205 # Add any extra flags
206 CFLAGS
= $(EXTRA_CFLAGS
)
208 CFLAGS
+= --target
=$(TARGET_TRIPLE
)
209 # WebAssembly floating-point match doesn't trap.
210 # TODO: Add -fno-signaling-nans when the compiler supports it.
211 CFLAGS
+= -fno-trapping-math
212 # Add all warnings, but disable a few which occur in third-party code.
213 CFLAGS
+= -Wall
-Wextra
-Werror \
214 -Wno-null-pointer-arithmetic \
215 -Wno-unused-parameter \
217 -Wno-unused-variable \
218 -Wno-unused-function \
219 -Wno-ignored-attributes \
220 -Wno-missing-braces \
221 -Wno-ignored-pragmas \
222 -Wno-unused-but-set-variable \
223 -Wno-unknown-warning-option
225 # Configure support for threads.
226 ifeq ($(THREAD_MODEL
), single
)
227 CFLAGS
+= -mthread-model single
229 ifeq ($(THREAD_MODEL
), posix
)
230 CFLAGS
+= -mthread-model posix
-pthread
233 # Expose the public headers to the implementation. We use `-isystem` for
234 # purpose for two reasons:
236 # 1. It only does `<...>` not `"...."` lookup. We are making a libc,
237 # which is a system library, so all public headers should be
238 # accessible via `<...>` and never also need `"..."`. `-isystem` main
239 # purpose is to only effect `<...>` lookup.
241 # 2. The `-I` for private headers added for specific C files below
242 # should come earlier in the search path, so they can "override"
243 # and/or `#include_next` the public headers. `-isystem` (like
244 # `-idirafter`) comes later in the search path than `-I`.
245 CFLAGS
+= -isystem
"$(SYSROOT_INC)"
247 # These variables describe the locations of various files and directories in
249 objs
= $(patsubst $(CURDIR
)/%.c
,$(OBJDIR
)/%.o
,$(1))
250 DLMALLOC_OBJS
= $(call objs
,$(DLMALLOC_SOURCES
))
251 LIBC_BOTTOM_HALF_ALL_OBJS
= $(call objs
,$(LIBC_BOTTOM_HALF_ALL_SOURCES
))
252 LIBC_TOP_HALF_ALL_OBJS
= $(call objs
,$(LIBC_TOP_HALF_ALL_SOURCES
))
253 ifeq ($(MALLOC_IMPL
),dlmalloc
)
254 LIBC_OBJS
+= $(DLMALLOC_OBJS
)
255 else ifeq ($(MALLOC_IMPL
),none
)
256 # No object files to add.
258 $(error unknown malloc implementation
$(MALLOC_IMPL
))
260 # Add libc-bottom-half's objects.
261 LIBC_OBJS
+= $(LIBC_BOTTOM_HALF_ALL_OBJS
)
262 ifeq ($(BUILD_LIBC_TOP_HALF
),yes
)
263 # libc-top-half is musl.
264 LIBC_OBJS
+= $(LIBC_TOP_HALF_ALL_OBJS
)
266 MUSL_PRINTSCAN_OBJS
= $(call objs
,$(MUSL_PRINTSCAN_SOURCES
))
267 MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
= $(patsubst %.o
,%.long-double.o
,$(MUSL_PRINTSCAN_OBJS
))
268 MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
= $(patsubst %.o
,%.no-floating-point.o
,$(MUSL_PRINTSCAN_OBJS
))
269 BULK_MEMORY_OBJS
= $(call objs
,$(BULK_MEMORY_SOURCES
))
270 LIBWASI_EMULATED_MMAN_OBJS
= $(call objs
,$(LIBWASI_EMULATED_MMAN_SOURCES
))
271 LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
= $(call objs
,$(LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES
))
272 LIBWASI_EMULATED_GETPID_OBJS
= $(call objs
,$(LIBWASI_EMULATED_GETPID_SOURCES
))
273 LIBWASI_EMULATED_SIGNAL_OBJS
= $(call objs
,$(LIBWASI_EMULATED_SIGNAL_SOURCES
))
274 LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
= $(call objs
,$(LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES
))
276 # These variables describe the locations of various files and
277 # directories in the generated sysroot tree.
278 SYSROOT_LIB
:= $(SYSROOT
)/lib
/$(MULTIARCH_TRIPLE
)
279 SYSROOT_INC
= $(SYSROOT
)/include
280 SYSROOT_SHARE
= $(SYSROOT
)/share
/$(MULTIARCH_TRIPLE
)
282 # Files from musl's include directory that we don't want to install in the
283 # sysroot's include directory.
286 # Remove files which aren't headers (we generate alltypes.h below).
287 MUSL_OMIT_HEADERS
+= \
288 "bits/syscall.h.in" \
289 "bits/alltypes.h.in" \
292 # Use the compiler's version of these headers.
293 MUSL_OMIT_HEADERS
+= \
297 # Use the WASI errno definitions.
298 MUSL_OMIT_HEADERS
+= \
301 # Remove headers that aren't supported yet or that aren't relevant for WASI.
302 MUSL_OMIT_HEADERS
+= \
305 "sys/kd.h" "sys/vt.h" "sys/soundcard.h" "sys/sem.h" \
306 "sys/shm.h" "sys/msg.h" "sys/ipc.h" "sys/ptrace.h" \
308 "bits/kd.h" "bits/vt.h" "bits/soundcard.h" "bits/sem.h" \
309 "bits/shm.h" "bits/msg.h" "bits/ipc.h" "bits/ptrace.h" \
313 "syslog.h" "sys/syslog.h" \
314 "wait.h" "sys/wait.h" \
315 "ucontext.h" "sys/ucontext.h" \
321 "sys/epoll.h" "sys/reboot.h" "sys/swap.h" \
322 "sys/sendfile.h" "sys/inotify.h" \
331 "sys/personality.h" \
332 "elf.h" "link.h" "bits/link.h" \
333 "scsi/scsi.h" "scsi/scsi_ioctl.h" "scsi/sg.h" \
335 "pwd.h" "shadow.h" "grp.h" \
355 "netinet/if_ether.h" \
361 ifeq ($(THREAD_MODEL
), single
)
362 # Remove headers not supported in single-threaded mode.
363 MUSL_OMIT_HEADERS
+= "aio.h" "pthread.h"
368 $(SYSROOT_LIB
)/libc.a
: $(LIBC_OBJS
)
370 $(SYSROOT_LIB
)/libc-printscan-long-double.a
: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
)
372 $(SYSROOT_LIB
)/libc-printscan-no-floating-point.a
: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
)
374 $(SYSROOT_LIB
)/libwasi-emulated-mman.a
: $(LIBWASI_EMULATED_MMAN_OBJS
)
376 $(SYSROOT_LIB
)/libwasi-emulated-process-clocks.a
: $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
)
378 $(SYSROOT_LIB
)/libwasi-emulated-getpid.a
: $(LIBWASI_EMULATED_GETPID_OBJS
)
380 $(SYSROOT_LIB
)/libwasi-emulated-signal.a
: $(LIBWASI_EMULATED_SIGNAL_OBJS
) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
)
384 # On Windows, the commandline for the ar invocation got too long, so it needs to be split up.
385 $(AR
) crs
$@
$(wordlist
1, 199, $^
)
386 $(AR
) crs
$@
$(wordlist
200, 399, $^
)
387 $(AR
) crs
$@
$(wordlist
400, 599, $^
)
388 $(AR
) crs
$@
$(wordlist
600, 799, $^
)
389 # This might eventually overflow again, but at least it'll do so in a loud way instead of
390 # silently dropping the tail.
391 $(AR
) crs
$@
$(wordlist
800, 100000, $^
)
393 $(MUSL_PRINTSCAN_OBJS
): CFLAGS
+= \
394 -D__wasilibc_printscan_no_long_double \
395 -D__wasilibc_printscan_full_support_option
="\"add -lc-printscan-long-double to the link command\""
397 $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
): CFLAGS
+= \
398 -D__wasilibc_printscan_no_floating_point \
399 -D__wasilibc_printscan_floating_point_support_option
="\"remove -lc-printscan-no-floating-point from the link command\""
401 # TODO: apply -mbulk-memory globally, once
402 # https://github.com/llvm/llvm-project/issues/52618 is resolved
403 $(BULK_MEMORY_OBJS
): CFLAGS
+= \
406 $(BULK_MEMORY_OBJS
): CFLAGS
+= \
407 -DBULK_MEMORY_THRESHOLD
=$(BULK_MEMORY_THRESHOLD
)
409 $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
): CFLAGS
+= \
410 -D_WASI_EMULATED_SIGNAL
412 $(OBJDIR
)/%.long-double.o
: $(CURDIR
)/%.c include_dirs
414 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
416 $(OBJDIR
)/%.no-floating-point.o
: $(CURDIR
)/%.c include_dirs
418 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
420 $(OBJDIR
)/%.o
: $(CURDIR
)/%.c include_dirs
422 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
424 -include $(shell find
$(OBJDIR
) -name \
*.d
)
426 $(DLMALLOC_OBJS
): CFLAGS
+= \
429 startup_files
$(LIBC_BOTTOM_HALF_ALL_OBJS
): CFLAGS
+= \
430 -I
$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE
) \
431 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC
) \
432 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
) \
433 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/include \
434 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal
436 $(LIBC_TOP_HALF_ALL_OBJS
) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
): CFLAGS
+= \
437 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/include \
438 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal \
439 -I
$(LIBC_TOP_HALF_MUSL_DIR
)/arch
/wasm32 \
440 -I
$(LIBC_TOP_HALF_MUSL_DIR
)/arch
/generic \
441 -I
$(LIBC_TOP_HALF_HEADERS_PRIVATE
) \
443 -Wno-shift-op-parentheses \
444 -Wno-bitwise-op-parentheses \
445 -Wno-logical-op-parentheses \
446 -Wno-string-plus-int \
450 $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
): CFLAGS
+= \
451 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)
455 # Install the include files.
457 mkdir
-p
"$(SYSROOT_INC)"
458 cp
-r
"$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)"
460 # Generate musl's bits/alltypes.h header.
461 mkdir
-p
"$(SYSROOT_INC)/bits"
462 sed
-f
$(LIBC_TOP_HALF_MUSL_DIR
)/tools
/mkalltypes.sed \
463 $(LIBC_TOP_HALF_MUSL_DIR
)/arch
/wasm32
/bits
/alltypes.h.in \
464 $(LIBC_TOP_HALF_MUSL_DIR
)/include/alltypes.h.in \
465 > "$(SYSROOT_INC)/bits/alltypes.h"
467 # Copy in the bulk of musl's public header files.
468 cp
-r
"$(LIBC_TOP_HALF_MUSL_INC)"/* "$(SYSROOT_INC)"
469 # Copy in the musl's "bits" header files.
470 cp
-r
"$(LIBC_TOP_HALF_MUSL_DIR)"/arch
/generic
/bits
/* "$(SYSROOT_INC)/bits"
471 cp
-r
"$(LIBC_TOP_HALF_MUSL_DIR)"/arch
/wasm32
/bits
/* "$(SYSROOT_INC)/bits"
473 # Remove selected header files.
474 $(RM
) $(patsubst %,$(SYSROOT_INC
)/%,$(MUSL_OMIT_HEADERS
))
476 startup_files
: include_dirs
478 # Build the startup files.
480 @mkdir
-p
"$(OBJDIR)"
482 $(CC
) $(CFLAGS
) -c
$(LIBC_BOTTOM_HALF_CRT_SOURCES
) -MD
-MP
&& \
483 mkdir
-p
"$(SYSROOT_LIB)" && \
484 mv
*.o
"$(SYSROOT_LIB)"
487 $(SYSROOT_LIB
)/libc.a \
488 $(SYSROOT_LIB
)/libc-printscan-long-double.a \
489 $(SYSROOT_LIB
)/libc-printscan-no-floating-point.a \
490 $(SYSROOT_LIB
)/libwasi-emulated-mman.a \
491 $(SYSROOT_LIB
)/libwasi-emulated-process-clocks.a \
492 $(SYSROOT_LIB
)/libwasi-emulated-getpid.a \
493 $(SYSROOT_LIB
)/libwasi-emulated-signal.a
495 finish
: startup_files libc
497 # Create empty placeholder libraries.
499 for name in m rt pthread crypt util xnet resolv dl
; do \
500 $(AR
) crs
"$(SYSROOT_LIB)/lib$${name}.a"; \
504 # The build succeeded! The generated sysroot is in $(SYSROOT).
507 # The check for defined and undefined symbols expects there to be a heap
508 # alloctor (providing malloc, calloc, free, etc). Skip this step if the build
509 # is done without a malloc implementation.
510 ifneq ($(MALLOC_IMPL
),none
)
511 finish
: check-symbols
514 DEFINED_SYMBOLS
= $(SYSROOT_SHARE
)/defined-symbols.txt
515 UNDEFINED_SYMBOLS
= $(SYSROOT_SHARE
)/undefined-symbols.txt
517 check-symbols
: startup_files libc
519 # Collect metadata on the sysroot and perform sanity checks.
521 mkdir
-p
"$(SYSROOT_SHARE)"
524 # Collect symbol information.
526 @
# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on
527 @
# LLVM PR40497, which is fixed in 9.0, but not in 8.0.
528 @
# Ignore certain llvm builtin symbols such as those starting with __mul
529 @
# since these dependencies can vary between llvm versions.
530 "$(NM)" --defined-only
"$(SYSROOT_LIB)"/libc.a
"$(SYSROOT_LIB)"/libwasi-emulated-
*.a
"$(SYSROOT_LIB)"/*.o \
531 |grep
' [[:upper:]] ' |sed
's/.* [[:upper:]] //' |LC_ALL
=C
sort |uniq
> "$(DEFINED_SYMBOLS)"
532 for undef_sym in
$$("$(NM)" --undefined-only
"$(SYSROOT_LIB)"/libc.a
"$(SYSROOT_LIB)"/libc-
*.a
"$(SYSROOT_LIB)"/*.o \
533 |grep
' U ' |sed
's/.* U //' |LC_ALL
=C
sort |uniq
); do \
534 grep
-q
'\<'$$undef_sym'\>' "$(DEFINED_SYMBOLS)" || echo
$$undef_sym; \
535 done | grep
-v
"^__mul" > "$(UNDEFINED_SYMBOLS)"
536 grep
'^_*imported_wasi_' "$(UNDEFINED_SYMBOLS)" \
537 > "$(SYSROOT_LIB)/libc.imports"
540 # Generate a test file that includes all public C header files.
542 cd
"$(SYSROOT_INC)" && \
543 for header in
$$(find .
-type f
-not
-name mman.h
-not
-name signal.h
-not
-name times.h
-not
-name resource.h |grep
-v
/bits
/ |grep
-v
/c
++/); do \
544 echo
'#include <'$$header'>' | sed
's/\.\///' ; \
545 done |LC_ALL
=C
sort >$(SYSROOT_SHARE
)/include-all.c
; \
549 # Test that it compiles.
551 $(CC
) $(CFLAGS
) -fsyntax-only
"$(SYSROOT_SHARE)/include-all.c" -Wno-\
#warnings
554 # Collect all the predefined macros, except for compiler version macros
555 # which we don't need to track here.
558 @
# For the __*_ATOMIC_*_LOCK_FREE macros, squash individual compiler names
559 @
# to attempt, toward keeping these files compiler-independent.
561 @
# We have to add `-isystem $(SYSROOT_INC)` because otherwise clang puts
562 @
# its builtin include path first, which produces compiler-specific
565 @
# TODO: Undefine __FLOAT128__ for now since it's not in clang 8.0.
566 @
# TODO: Filter out __FLT16_* for now, as not all versions of clang have these.
567 @
# TODO: Filter out __NO_MATH_ERRNO_ and a few __*WIDTH__ that are new to clang 14.
568 @
# TODO: clang defined __FLT_EVAL_METHOD__ until clang 15, so we force-undefine it
569 @
# for older versions.
570 $(CC
) $(CFLAGS
) "$(SYSROOT_SHARE)/include-all.c" \
571 -isystem
$(SYSROOT_INC
) \
573 -E
-dM
-Wno-\
#warnings \
579 -U__clang_patchlevel__ \
580 -U__clang_version__ \
581 -U__clang_literal_encoding__ \
582 -U__clang_wide_literal_encoding__ \
585 -U__GNUC_PATCHLEVEL__ \
588 -U__NO_MATH_ERRNO__ \
589 -U__BITINT_MAXWIDTH__ \
590 -U__FLT_EVAL_METHOD__
-Wno-builtin-macro-redefined \
591 | sed
-e
's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \
592 | grep
-v
'^#define __FLT16_' \
593 | grep
-v
'^#define __\(BOOL\|INT_\(LEAST\|FAST\)\(8\|16\|32\|64\)\|INT\|LONG\|LLONG\|SHRT\)_WIDTH__' \
594 > "$(SYSROOT_SHARE)/predefined-macros.txt"
596 # Check that the computed metadata matches the expected metadata.
597 # This ignores whitespace because on Windows the output has CRLF line endings.
598 diff
-wur
"$(CURDIR)/expected/$(MULTIARCH_TRIPLE)" "$(SYSROOT_SHARE)"
601 mkdir
-p
"$(INSTALL_DIR)"
602 cp
-r
"$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)"
606 $(RM
) -r
"$(SYSROOT)"
608 .PHONY
: default startup_files libc finish
install include_dirs
clean