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 # Variables from this point on are not meant to be overridable via the
28 # Set the target variables. Multiarch triples notably omit the vendor field,
29 # which happens to be what we do for the main target triple too.
30 TARGET_TRIPLE
= wasm32-wasi
31 MULTIARCH_TRIPLE
= wasm32-wasi
33 # These variables describe the locations of various files and directories in
35 DLMALLOC_DIR
= $(CURDIR
)/dlmalloc
36 DLMALLOC_SRC_DIR
= $(DLMALLOC_DIR
)/src
37 DLMALLOC_SOURCES
= $(DLMALLOC_SRC_DIR
)/dlmalloc.c
38 DLMALLOC_INC
= $(DLMALLOC_DIR
)/include
39 LIBC_BOTTOM_HALF_DIR
= $(CURDIR
)/libc-bottom-half
40 LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
= $(LIBC_BOTTOM_HALF_DIR
)/cloudlibc
/src
41 LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC
= $(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)/include
42 LIBC_BOTTOM_HALF_HEADERS_PUBLIC
= $(LIBC_BOTTOM_HALF_DIR
)/headers
/public
43 LIBC_BOTTOM_HALF_HEADERS_PRIVATE
= $(LIBC_BOTTOM_HALF_DIR
)/headers
/private
44 LIBC_BOTTOM_HALF_SOURCES
= $(LIBC_BOTTOM_HALF_DIR
)/sources
45 LIBC_BOTTOM_HALF_ALL_SOURCES
= \
46 $(shell find
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
) -name \
*.c
) \
47 $(shell find
$(LIBC_BOTTOM_HALF_SOURCES
) -name \
*.c
)
49 # FIXME(https://reviews.llvm.org/D85567) - due to a bug in LLD the weak
50 # references to a function defined in `chdir.c` only work if `chdir.c` is at the
51 # end of the archive, but once that LLD review lands and propagates into LLVM
52 # then we don't have to do this.
53 LIBC_BOTTOM_HALF_ALL_SOURCES
:= $(filter-out $(LIBC_BOTTOM_HALF_SOURCES
)/chdir.c
,$(LIBC_BOTTOM_HALF_ALL_SOURCES
))
54 LIBC_BOTTOM_HALF_ALL_SOURCES
:= $(LIBC_BOTTOM_HALF_ALL_SOURCES
) $(LIBC_BOTTOM_HALF_SOURCES
)/chdir.c
56 LIBWASI_EMULATED_MMAN_SOURCES
= \
57 $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/mman
-name \
*.c
)
58 LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES
= \
59 $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/clocks
-name \
*.c
)
60 LIBWASI_EMULATED_GETPID_SOURCES
= \
61 $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/getpid
-name \
*.c
)
62 LIBWASI_EMULATED_SIGNAL_SOURCES
= \
63 $(shell find
$(LIBC_BOTTOM_HALF_DIR
)/signal
-name \
*.c
)
64 LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES
= \
65 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/signal
/psignal.c \
66 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/strsignal.c
67 LIBC_BOTTOM_HALF_CRT_SOURCES
= $(wildcard $(LIBC_BOTTOM_HALF_DIR
)/crt
/*.c
)
68 LIBC_TOP_HALF_DIR
= $(CURDIR
)/libc-top-half
69 LIBC_TOP_HALF_MUSL_DIR
= $(LIBC_TOP_HALF_DIR
)/musl
70 LIBC_TOP_HALF_MUSL_SRC_DIR
= $(LIBC_TOP_HALF_MUSL_DIR
)/src
71 LIBC_TOP_HALF_MUSL_INC
= $(LIBC_TOP_HALF_MUSL_DIR
)/include
72 LIBC_TOP_HALF_MUSL_SOURCES
= \
73 $(addprefix $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/, \
81 misc
/getdomainname.c \
96 network
/in6addr_any.c \
97 network
/in6addr_loopback.c \
101 fenv
/fesetexceptflag.c \
102 fenv
/fegetexceptflag.c \
103 fenv
/feholdexcept.c \
108 exit
/at_quick_exit.c \
121 time
/timespec_get.c \
126 time
/__tm_to_secs.c \
127 time
/__month_to_secs.c \
128 time
/__secs_to_tm.c \
129 time
/__year_to_secs.c \
133 dirent
/versionsort.c \
139 unistd
/posix_close.c \
142 $(filter-out %/procfdname.c
%/syscall.c
%/syscall_ret.c
%/vdso.c
%/version.c
, \
143 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal
/*.c
)) \
144 $(filter-out %/flockfile.c
%/funlockfile.c
%/__lockfile.c
%/ftrylockfile.c \
146 %/tmpnam.c
%/tmpfile.c
%/tempnam.c \
147 %/popen.c
%/pclose.c \
150 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/*.c
)) \
151 $(filter-out %/strsignal.c
, \
152 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/string
/*.c
)) \
153 $(filter-out %/dcngettext.c
%/textdomain.c
%/bind_textdomain_codeset.c
, \
154 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/locale
/*.c
)) \
155 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/*.c
) \
156 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/search
/*.c
) \
157 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/multibyte
/*.c
) \
158 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/regex
/*.c
) \
159 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/prng
/*.c
) \
160 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/conf
/*.c
) \
161 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/ctype
/*.c
) \
162 $(filter-out %/__signbit.c
%/__signbitf.c
%/__signbitl.c \
163 %/__fpclassify.c
%/__fpclassifyf.c
%/__fpclassifyl.c \
165 %/floorf.c
%/floor.c \
166 %/truncf.c
%/trunc.c \
168 %/nearbyintf.c
%/nearbyint.c \
171 %/copysignf.c
%/copysign.c \
172 %/fminf.c
%/fmaxf.c \
174 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/math
/*.c
)) \
175 $(filter-out %/crealf.c
%/creal.c
%creall.c \
176 %/cimagf.c
%/cimag.c
%cimagl.c
, \
177 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/complex
/*.c
)) \
178 $(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/crypt
/*.c
)
179 MUSL_PRINTSCAN_SOURCES
= \
180 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal
/floatscan.c \
181 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfprintf.c \
182 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfwprintf.c \
183 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdio
/vfscanf.c \
184 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/strtod.c \
185 $(LIBC_TOP_HALF_MUSL_SRC_DIR
)/stdlib
/wcstod.c
186 LIBC_TOP_HALF_HEADERS_PRIVATE
= $(LIBC_TOP_HALF_DIR
)/headers
/private
187 LIBC_TOP_HALF_SOURCES
= $(LIBC_TOP_HALF_DIR
)/sources
188 LIBC_TOP_HALF_ALL_SOURCES
= \
189 $(LIBC_TOP_HALF_MUSL_SOURCES
) \
190 $(shell find
$(LIBC_TOP_HALF_SOURCES
) -name \
*.c
)
192 # Add any extra flags
193 CFLAGS
= $(EXTRA_CFLAGS
)
195 CFLAGS
+= --target
=$(TARGET_TRIPLE
)
196 # WebAssembly floating-point match doesn't trap.
197 # TODO: Add -fno-signaling-nans when the compiler supports it.
198 CFLAGS
+= -fno-trapping-math
199 # Add all warnings, but disable a few which occur in third-party code.
200 CFLAGS
+= -Wall
-Wextra
-Werror \
201 -Wno-null-pointer-arithmetic \
202 -Wno-unused-parameter \
204 -Wno-unused-variable \
205 -Wno-unused-function \
206 -Wno-ignored-attributes \
207 -Wno-missing-braces \
208 -Wno-ignored-pragmas \
209 -Wno-unused-but-set-variable \
210 -Wno-unknown-warning-option
212 # Configure support for threads.
213 ifeq ($(THREAD_MODEL
), single
)
214 CFLAGS
+= -mthread-model single
-ftls-model
=local-exec
216 ifeq ($(THREAD_MODEL
), posix
)
217 CFLAGS
+= -mthread-model posix
-pthread
220 # Expose the public headers to the implementation. We use `-isystem` for
221 # purpose for two reasons:
223 # 1. It only does `<...>` not `"...."` lookup. We are making a libc,
224 # which is a system library, so all public headers should be
225 # accessible via `<...>` and never also need `"..."`. `-isystem` main
226 # purpose is to only effect `<...>` lookup.
228 # 2. The `-I` for private headers added for specific C files below
229 # should come earlier in the search path, so they can "override"
230 # and/or `#include_next` the public headers. `-isystem` (like
231 # `-idirafter`) comes later in the search path than `-I`.
232 CFLAGS
+= -isystem
"$(SYSROOT_INC)"
234 # These variables describe the locations of various files and directories in
236 objs
= $(patsubst $(CURDIR
)/%.c
,$(OBJDIR
)/%.o
,$(1))
237 DLMALLOC_OBJS
= $(call objs
,$(DLMALLOC_SOURCES
))
238 LIBC_BOTTOM_HALF_ALL_OBJS
= $(call objs
,$(LIBC_BOTTOM_HALF_ALL_SOURCES
))
239 LIBC_TOP_HALF_ALL_OBJS
= $(call objs
,$(LIBC_TOP_HALF_ALL_SOURCES
))
240 ifeq ($(MALLOC_IMPL
),dlmalloc
)
241 LIBC_OBJS
+= $(DLMALLOC_OBJS
)
242 else ifeq ($(MALLOC_IMPL
),none
)
243 # No object files to add.
245 $(error unknown malloc implementation
$(MALLOC_IMPL
))
247 # Add libc-bottom-half's objects.
248 LIBC_OBJS
+= $(LIBC_BOTTOM_HALF_ALL_OBJS
)
249 ifeq ($(BUILD_LIBC_TOP_HALF
),yes
)
250 # libc-top-half is musl.
251 LIBC_OBJS
+= $(LIBC_TOP_HALF_ALL_OBJS
)
253 MUSL_PRINTSCAN_OBJS
= $(call objs
,$(MUSL_PRINTSCAN_SOURCES
))
254 MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
= $(patsubst %.o
,%.long-double.o
,$(MUSL_PRINTSCAN_OBJS
))
255 MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
= $(patsubst %.o
,%.no-floating-point.o
,$(MUSL_PRINTSCAN_OBJS
))
256 LIBWASI_EMULATED_MMAN_OBJS
= $(call objs
,$(LIBWASI_EMULATED_MMAN_SOURCES
))
257 LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
= $(call objs
,$(LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES
))
258 LIBWASI_EMULATED_GETPID_OBJS
= $(call objs
,$(LIBWASI_EMULATED_GETPID_SOURCES
))
259 LIBWASI_EMULATED_SIGNAL_OBJS
= $(call objs
,$(LIBWASI_EMULATED_SIGNAL_SOURCES
))
260 LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
= $(call objs
,$(LIBWASI_EMULATED_SIGNAL_MUSL_SOURCES
))
262 # These variables describe the locations of various files and
263 # directories in the generated sysroot tree.
264 SYSROOT_LIB
:= $(SYSROOT
)/lib
/$(MULTIARCH_TRIPLE
)
265 SYSROOT_INC
= $(SYSROOT
)/include
266 SYSROOT_SHARE
= $(SYSROOT
)/share
/$(MULTIARCH_TRIPLE
)
268 # Files from musl's include directory that we don't want to install in the
269 # sysroot's include directory.
272 # Remove files which aren't headers (we generate alltypes.h below).
273 MUSL_OMIT_HEADERS
+= \
274 "bits/syscall.h.in" \
275 "bits/alltypes.h.in" \
278 # Use the compiler's version of these headers.
279 MUSL_OMIT_HEADERS
+= \
283 # Use the WASI errno definitions.
284 MUSL_OMIT_HEADERS
+= \
287 # Remove headers that aren't supported yet or that aren't relevant for WASI.
288 MUSL_OMIT_HEADERS
+= \
291 "sys/kd.h" "sys/vt.h" "sys/soundcard.h" "sys/sem.h" \
292 "sys/shm.h" "sys/msg.h" "sys/ipc.h" "sys/ptrace.h" \
294 "bits/kd.h" "bits/vt.h" "bits/soundcard.h" "bits/sem.h" \
295 "bits/shm.h" "bits/msg.h" "bits/ipc.h" "bits/ptrace.h" \
299 "syslog.h" "sys/syslog.h" \
300 "wait.h" "sys/wait.h" \
301 "ucontext.h" "sys/ucontext.h" \
307 "sys/epoll.h" "sys/reboot.h" "sys/swap.h" \
308 "sys/sendfile.h" "sys/inotify.h" \
317 "sys/personality.h" \
318 "elf.h" "link.h" "bits/link.h" \
319 "scsi/scsi.h" "scsi/scsi_ioctl.h" "scsi/sg.h" \
321 "pwd.h" "shadow.h" "grp.h" \
341 "netinet/if_ether.h" \
347 ifeq ($(THREAD_MODEL
), single
)
348 # Remove headers not supported in single-threaded mode.
349 MUSL_OMIT_HEADERS
+= "aio.h" "pthread.h"
354 $(SYSROOT_LIB
)/libc.a
: $(LIBC_OBJS
)
356 $(SYSROOT_LIB
)/libc-printscan-long-double.a
: $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
)
358 $(SYSROOT_LIB
)/libc-printscan-no-floating-point.a
: $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
)
360 $(SYSROOT_LIB
)/libwasi-emulated-mman.a
: $(LIBWASI_EMULATED_MMAN_OBJS
)
362 $(SYSROOT_LIB
)/libwasi-emulated-process-clocks.a
: $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
)
364 $(SYSROOT_LIB
)/libwasi-emulated-getpid.a
: $(LIBWASI_EMULATED_GETPID_OBJS
)
366 $(SYSROOT_LIB
)/libwasi-emulated-signal.a
: $(LIBWASI_EMULATED_SIGNAL_OBJS
) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
)
370 # On Windows, the commandline for the ar invocation got too long, so it needs to be split up.
371 $(AR
) crs
$@
$(wordlist
1, 199, $^
)
372 $(AR
) crs
$@
$(wordlist
200, 399, $^
)
373 $(AR
) crs
$@
$(wordlist
400, 599, $^
)
374 $(AR
) crs
$@
$(wordlist
600, 799, $^
)
375 # This might eventually overflow again, but at least it'll do so in a loud way instead of
376 # silently dropping the tail.
377 $(AR
) crs
$@
$(wordlist
800, 100000, $^
)
379 $(MUSL_PRINTSCAN_OBJS
): CFLAGS
+= \
380 -D__wasilibc_printscan_no_long_double \
381 -D__wasilibc_printscan_full_support_option
="\"add -lc-printscan-long-double to the link command\""
383 $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
): CFLAGS
+= \
384 -D__wasilibc_printscan_no_floating_point \
385 -D__wasilibc_printscan_floating_point_support_option
="\"remove -lc-printscan-no-floating-point from the link command\""
387 $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
): CFLAGS
+= \
388 -D_WASI_EMULATED_SIGNAL
390 $(OBJDIR
)/%.long-double.o
: $(CURDIR
)/%.c include_dirs
392 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
394 $(OBJDIR
)/%.no-floating-point.o
: $(CURDIR
)/%.c include_dirs
396 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
398 $(OBJDIR
)/%.o
: $(CURDIR
)/%.c include_dirs
400 $(CC
) $(CFLAGS
) -MD
-MP
-o
$@
-c
$<
402 -include $(shell find
$(OBJDIR
) -name \
*.d
)
404 $(DLMALLOC_OBJS
): CFLAGS
+= \
407 startup_files
$(LIBC_BOTTOM_HALF_ALL_OBJS
): CFLAGS
+= \
408 -I
$(LIBC_BOTTOM_HALF_HEADERS_PRIVATE
) \
409 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC_INC
) \
410 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)
412 $(LIBC_TOP_HALF_ALL_OBJS
) $(MUSL_PRINTSCAN_LONG_DOUBLE_OBJS
) $(MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS
) $(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS
): CFLAGS
+= \
413 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/include \
414 -I
$(LIBC_TOP_HALF_MUSL_SRC_DIR
)/internal \
415 -I
$(LIBC_TOP_HALF_MUSL_DIR
)/arch
/wasm32 \
416 -I
$(LIBC_TOP_HALF_MUSL_DIR
)/arch
/generic \
417 -I
$(LIBC_TOP_HALF_HEADERS_PRIVATE
) \
419 -Wno-shift-op-parentheses \
420 -Wno-bitwise-op-parentheses \
421 -Wno-logical-op-parentheses \
422 -Wno-string-plus-int \
426 $(LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS
): CFLAGS
+= \
427 -I
$(LIBC_BOTTOM_HALF_CLOUDLIBC_SRC
)
431 # Install the include files.
433 mkdir
-p
"$(SYSROOT_INC)"
434 cp
-r
"$(LIBC_BOTTOM_HALF_HEADERS_PUBLIC)"/* "$(SYSROOT_INC)"
436 # Generate musl's bits/alltypes.h header.
437 mkdir
-p
"$(SYSROOT_INC)/bits"
438 sed
-f
$(LIBC_TOP_HALF_MUSL_DIR
)/tools
/mkalltypes.sed \
439 $(LIBC_TOP_HALF_MUSL_DIR
)/arch
/wasm32
/bits
/alltypes.h.in \
440 $(LIBC_TOP_HALF_MUSL_DIR
)/include/alltypes.h.in \
441 > "$(SYSROOT_INC)/bits/alltypes.h"
443 # Copy in the bulk of musl's public header files.
444 cp
-r
"$(LIBC_TOP_HALF_MUSL_INC)"/* "$(SYSROOT_INC)"
445 # Copy in the musl's "bits" header files.
446 cp
-r
"$(LIBC_TOP_HALF_MUSL_DIR)"/arch
/generic
/bits
/* "$(SYSROOT_INC)/bits"
447 cp
-r
"$(LIBC_TOP_HALF_MUSL_DIR)"/arch
/wasm32
/bits
/* "$(SYSROOT_INC)/bits"
449 # Remove selected header files.
450 $(RM
) $(patsubst %,$(SYSROOT_INC
)/%,$(MUSL_OMIT_HEADERS
))
452 startup_files
: include_dirs
454 # Build the startup files.
456 @mkdir
-p
"$(OBJDIR)"
458 $(CC
) $(CFLAGS
) -c
$(LIBC_BOTTOM_HALF_CRT_SOURCES
) -MD
-MP
&& \
459 mkdir
-p
"$(SYSROOT_LIB)" && \
460 mv
*.o
"$(SYSROOT_LIB)"
463 $(SYSROOT_LIB
)/libc.a \
464 $(SYSROOT_LIB
)/libc-printscan-long-double.a \
465 $(SYSROOT_LIB
)/libc-printscan-no-floating-point.a \
466 $(SYSROOT_LIB
)/libwasi-emulated-mman.a \
467 $(SYSROOT_LIB
)/libwasi-emulated-process-clocks.a \
468 $(SYSROOT_LIB
)/libwasi-emulated-getpid.a \
469 $(SYSROOT_LIB
)/libwasi-emulated-signal.a
471 finish
: startup_files libc
473 # Create empty placeholder libraries.
475 for name in m rt pthread crypt util xnet resolv dl
; do \
476 $(AR
) crs
"$(SYSROOT_LIB)/lib$${name}.a"; \
480 # The build succeeded! The generated sysroot is in $(SYSROOT).
483 # The check for defined and undefined symbols expects there to be a heap
484 # alloctor (providing malloc, calloc, free, etc). Skip this step if the build
485 # is done without a malloc implementation.
486 ifneq ($(MALLOC_IMPL
),none
)
487 finish
: check-symbols
490 DEFINED_SYMBOLS
= $(SYSROOT_SHARE
)/defined-symbols.txt
491 UNDEFINED_SYMBOLS
= $(SYSROOT_SHARE
)/undefined-symbols.txt
493 check-symbols
: startup_files libc
495 # Collect metadata on the sysroot and perform sanity checks.
497 mkdir
-p
"$(SYSROOT_SHARE)"
500 # Collect symbol information.
502 @
# TODO: Use llvm-nm --extern-only instead of grep. This is blocked on
503 @
# LLVM PR40497, which is fixed in 9.0, but not in 8.0.
504 @
# Ignore certain llvm builtin symbols such as those starting with __mul
505 @
# since these dependencies can vary between llvm versions.
506 "$(NM)" --defined-only
"$(SYSROOT_LIB)"/libc.a
"$(SYSROOT_LIB)"/libwasi-emulated-
*.a
"$(SYSROOT_LIB)"/*.o \
507 |grep
' [[:upper:]] ' |sed
's/.* [[:upper:]] //' |LC_ALL
=C
sort > "$(DEFINED_SYMBOLS)"
508 for undef_sym in
$$("$(NM)" --undefined-only
"$(SYSROOT_LIB)"/libc.a
"$(SYSROOT_LIB)"/libc-
*.a
"$(SYSROOT_LIB)"/*.o \
509 |grep
' U ' |sed
's/.* U //' |LC_ALL
=C
sort |uniq
); do \
510 grep
-q
'\<'$$undef_sym'\>' "$(DEFINED_SYMBOLS)" || echo
$$undef_sym; \
511 done | grep
-v
"^__mul" > "$(UNDEFINED_SYMBOLS)"
512 grep
'^_*imported_wasi_' "$(UNDEFINED_SYMBOLS)" \
513 > "$(SYSROOT_LIB)/libc.imports"
516 # Generate a test file that includes all public C header files.
518 cd
"$(SYSROOT_INC)" && \
519 for header in
$$(find .
-type f
-not
-name mman.h
-not
-name signal.h
-not
-name times.h
-not
-name resource.h |grep
-v
/bits
/ |grep
-v
/c
++/); do \
520 echo
'#include <'$$header'>' | sed
's/\.\///' ; \
521 done |LC_ALL
=C
sort >$(SYSROOT_SHARE
)/include-all.c
; \
525 # Test that it compiles.
527 $(CC
) $(CFLAGS
) -fsyntax-only
"$(SYSROOT_SHARE)/include-all.c" -Wno-\
#warnings
530 # Collect all the predefined macros, except for compiler version macros
531 # which we don't need to track here.
534 @
# For the __*_ATOMIC_*_LOCK_FREE macros, squash individual compiler names
535 @
# to attempt, toward keeping these files compiler-independent.
537 @
# We have to add `-isystem $(SYSROOT_INC)` because otherwise clang puts
538 @
# its builtin include path first, which produces compiler-specific
541 @
# TODO: Undefine __FLOAT128__ for now since it's not in clang 8.0.
542 @
# TODO: Filter out __FLT16_* for now, as not all versions of clang have these.
543 @
# TODO: Filter out __NO_MATH_ERRNO_ and a few __*WIDTH__ that are new to clang 14.
544 @
# TODO: clang defined __FLT_EVAL_METHOD__ until clang 15, so we force-undefine it
545 @
# for older versions.
546 $(CC
) $(CFLAGS
) "$(SYSROOT_SHARE)/include-all.c" \
547 -isystem
$(SYSROOT_INC
) \
549 -E
-dM
-Wno-\
#warnings \
555 -U__clang_patchlevel__ \
556 -U__clang_version__ \
557 -U__clang_literal_encoding__ \
558 -U__clang_wide_literal_encoding__ \
561 -U__GNUC_PATCHLEVEL__ \
564 -U__NO_MATH_ERRNO__ \
565 -U__BITINT_MAXWIDTH__ \
566 -U__FLT_EVAL_METHOD__
-Wno-builtin-macro-redefined \
567 | sed
-e
's/__[[:upper:][:digit:]]*_ATOMIC_\([[:upper:][:digit:]_]*\)_LOCK_FREE/__compiler_ATOMIC_\1_LOCK_FREE/' \
568 | grep
-v
'^#define __FLT16_' \
569 | grep
-v
'^#define __\(BOOL\|INT_\(LEAST\|FAST\)\(8\|16\|32\|64\)\|INT\|LONG\|LLONG\|SHRT\)_WIDTH__' \
570 > "$(SYSROOT_SHARE)/predefined-macros.txt"
572 # Check that the computed metadata matches the expected metadata.
573 # This ignores whitespace because on Windows the output has CRLF line endings.
574 diff
-wur
"$(CURDIR)/expected/$(MULTIARCH_TRIPLE)" "$(SYSROOT_SHARE)"
577 mkdir
-p
"$(INSTALL_DIR)"
578 cp
-r
"$(SYSROOT)/lib" "$(SYSROOT)/share" "$(SYSROOT)/include" "$(INSTALL_DIR)"
582 $(RM
) -r
"$(SYSROOT)"
584 .PHONY
: default startup_files libc finish
install include_dirs
clean