403d93560b
This commit adds support for musl-libc and uses it by default on Linux.
The main benefit of it is that binaries are always statically linked
instead of depending on the host libc, even when using CGo.
Advantages:
- The resulting binaries are always statically linked.
- No need for any tools on the host OS, like a compiler, linker, or
libc in a release build of TinyGo.
- This also simplifies cross compilation as no cross compiler is
needed (it's all built into the TinyGo release build).
Disadvantages:
- Binary size increases by 5-6 kilobytes if -no-debug is used. Binary
size increases by a much larger margin when debugging symbols are
included (the default behavior) because musl is built with debugging
symbols enabled.
- Musl does things a bit differently than glibc, and some CGo code
might rely on the glibc behavior.
- The first build takes a bit longer because musl needs to be built.
As an additional bonus, time is now obtained from the system in a way
that fixes the Y2038 problem because musl has been a bit more agressive
in switching to 64-bit time_t.
245 строки
5,7 КиБ
Go
245 строки
5,7 КиБ
Go
package builder
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import (
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"os"
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"path/filepath"
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"github.com/tinygo-org/tinygo/goenv"
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)
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// Picolibc is a C library for bare metal embedded devices. It was originally
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// based on newlib.
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var Picolibc = Library{
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name: "picolibc",
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makeHeaders: func(target, includeDir string) error {
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f, err := os.Create(filepath.Join(includeDir, "picolibc.h"))
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if err != nil {
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return err
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}
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return f.Close()
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},
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cflags: func(target, headerPath string) []string {
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picolibcDir := filepath.Join(goenv.Get("TINYGOROOT"), "lib/picolibc/newlib/libc")
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return []string{
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"-Werror",
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"-Wall",
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"-std=gnu11",
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"-D_COMPILING_NEWLIB",
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"-DHAVE_ALIAS_ATTRIBUTE",
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"-DTINY_STDIO",
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"-nostdlibinc",
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"-Xclang", "-internal-isystem", "-Xclang", picolibcDir + "/include",
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"-I" + picolibcDir + "/tinystdio",
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"-I" + headerPath,
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}
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},
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sourceDir: "lib/picolibc/newlib/libc",
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librarySources: func(target string) []string {
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return picolibcSources
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},
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}
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var picolibcSources = []string{
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"../../../picolibc-stdio.c",
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"tinystdio/asprintf.c",
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"tinystdio/atod_engine.c",
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"tinystdio/atod_ryu.c",
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"tinystdio/atof_engine.c",
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"tinystdio/atof_ryu.c",
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//"tinystdio/atold_engine.c", // have_long_double and not long_double_equals_double
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"tinystdio/clearerr.c",
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"tinystdio/compare_exchange.c",
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"tinystdio/dtoa_data.c",
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"tinystdio/dtoa_engine.c",
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"tinystdio/dtoa_ryu.c",
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"tinystdio/ecvtbuf.c",
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"tinystdio/ecvt.c",
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"tinystdio/ecvt_data.c",
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"tinystdio/ecvtfbuf.c",
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"tinystdio/ecvtf.c",
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"tinystdio/ecvtf_data.c",
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"tinystdio/exchange.c",
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//"tinystdio/fclose.c", // posix-io
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"tinystdio/fcvtbuf.c",
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"tinystdio/fcvt.c",
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"tinystdio/fcvtfbuf.c",
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"tinystdio/fcvtf.c",
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"tinystdio/fdevopen.c",
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//"tinystdio/fdopen.c", // posix-io
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"tinystdio/feof.c",
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"tinystdio/ferror.c",
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"tinystdio/fflush.c",
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"tinystdio/fgetc.c",
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"tinystdio/fgets.c",
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"tinystdio/fileno.c",
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"tinystdio/filestrget.c",
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"tinystdio/filestrputalloc.c",
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"tinystdio/filestrput.c",
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//"tinystdio/fopen.c", // posix-io
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"tinystdio/fprintf.c",
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"tinystdio/fputc.c",
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"tinystdio/fputs.c",
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"tinystdio/fread.c",
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"tinystdio/fscanf.c",
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"tinystdio/fseek.c",
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"tinystdio/ftell.c",
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"tinystdio/ftoa_data.c",
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"tinystdio/ftoa_engine.c",
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"tinystdio/ftoa_ryu.c",
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"tinystdio/fwrite.c",
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"tinystdio/gcvtbuf.c",
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"tinystdio/gcvt.c",
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"tinystdio/gcvtfbuf.c",
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"tinystdio/gcvtf.c",
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"tinystdio/getchar.c",
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"tinystdio/gets.c",
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"tinystdio/matchcaseprefix.c",
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"tinystdio/perror.c",
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//"tinystdio/posixiob.c", // posix-io
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//"tinystdio/posixio.c", // posix-io
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"tinystdio/printf.c",
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"tinystdio/putchar.c",
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"tinystdio/puts.c",
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"tinystdio/ryu_divpow2.c",
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"tinystdio/ryu_log10.c",
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"tinystdio/ryu_log2pow5.c",
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"tinystdio/ryu_pow5bits.c",
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"tinystdio/ryu_table.c",
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"tinystdio/ryu_umul128.c",
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"tinystdio/scanf.c",
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"tinystdio/setbuf.c",
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"tinystdio/setvbuf.c",
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//"tinystdio/sflags.c", // posix-io
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"tinystdio/snprintf.c",
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"tinystdio/snprintfd.c",
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"tinystdio/snprintff.c",
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"tinystdio/sprintf.c",
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"tinystdio/sprintfd.c",
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"tinystdio/sprintff.c",
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"tinystdio/sscanf.c",
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"tinystdio/strfromd.c",
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"tinystdio/strfromf.c",
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"tinystdio/strtod.c",
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"tinystdio/strtod_l.c",
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"tinystdio/strtof.c",
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//"tinystdio/strtold.c", // have_long_double and not long_double_equals_double
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//"tinystdio/strtold_l.c", // have_long_double and not long_double_equals_double
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"tinystdio/ungetc.c",
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"tinystdio/vasprintf.c",
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"tinystdio/vfiprintf.c",
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"tinystdio/vfiscanf.c",
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"tinystdio/vfprintf.c",
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"tinystdio/vfprintff.c",
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"tinystdio/vfscanf.c",
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"tinystdio/vfscanff.c",
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"tinystdio/vprintf.c",
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"tinystdio/vscanf.c",
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"tinystdio/vsnprintf.c",
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"tinystdio/vsprintf.c",
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"tinystdio/vsscanf.c",
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"string/bcmp.c",
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"string/bcopy.c",
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"string/bzero.c",
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"string/explicit_bzero.c",
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"string/ffsl.c",
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"string/ffsll.c",
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"string/fls.c",
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"string/flsl.c",
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"string/flsll.c",
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"string/gnu_basename.c",
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"string/index.c",
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"string/memccpy.c",
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"string/memchr.c",
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"string/memcmp.c",
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"string/memcpy.c",
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"string/memmem.c",
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"string/memmove.c",
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"string/mempcpy.c",
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"string/memrchr.c",
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"string/memset.c",
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"string/rawmemchr.c",
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"string/rindex.c",
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"string/stpcpy.c",
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"string/stpncpy.c",
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"string/strcasecmp.c",
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"string/strcasecmp_l.c",
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"string/strcasestr.c",
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"string/strcat.c",
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"string/strchr.c",
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"string/strchrnul.c",
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"string/strcmp.c",
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"string/strcoll.c",
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"string/strcoll_l.c",
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"string/strcpy.c",
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"string/strcspn.c",
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"string/strdup.c",
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"string/strerror.c",
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"string/strerror_r.c",
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"string/strlcat.c",
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"string/strlcpy.c",
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"string/strlen.c",
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"string/strlwr.c",
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"string/strncasecmp.c",
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"string/strncasecmp_l.c",
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"string/strncat.c",
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"string/strncmp.c",
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"string/strncpy.c",
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"string/strndup.c",
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"string/strnlen.c",
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"string/strnstr.c",
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"string/strpbrk.c",
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"string/strrchr.c",
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"string/strsep.c",
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"string/strsignal.c",
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"string/strspn.c",
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"string/strstr.c",
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"string/strtok.c",
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"string/strtok_r.c",
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"string/strupr.c",
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"string/strverscmp.c",
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"string/strxfrm.c",
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"string/strxfrm_l.c",
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"string/swab.c",
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"string/timingsafe_bcmp.c",
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"string/timingsafe_memcmp.c",
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"string/u_strerr.c",
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"string/wcpcpy.c",
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"string/wcpncpy.c",
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"string/wcscasecmp.c",
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"string/wcscasecmp_l.c",
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"string/wcscat.c",
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"string/wcschr.c",
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"string/wcscmp.c",
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"string/wcscoll.c",
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"string/wcscoll_l.c",
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"string/wcscpy.c",
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"string/wcscspn.c",
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"string/wcsdup.c",
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"string/wcslcat.c",
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"string/wcslcpy.c",
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"string/wcslen.c",
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"string/wcsncasecmp.c",
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"string/wcsncasecmp_l.c",
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"string/wcsncat.c",
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"string/wcsncmp.c",
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"string/wcsncpy.c",
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"string/wcsnlen.c",
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"string/wcspbrk.c",
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"string/wcsrchr.c",
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"string/wcsspn.c",
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"string/wcsstr.c",
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"string/wcstok.c",
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"string/wcswidth.c",
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"string/wcsxfrm.c",
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"string/wcsxfrm_l.c",
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"string/wcwidth.c",
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"string/wmemchr.c",
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"string/wmemcmp.c",
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"string/wmemcpy.c",
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"string/wmemmove.c",
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"string/wmempcpy.c",
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"string/wmemset.c",
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"string/xpg_strerror_r.c",
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}
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