The following table shows all Go standard library packages and whether they can be imported by TinyGo. If they can’t, you can click the ‘no’ link to jump to the explanation why the package cannot be compiled.
Note that the fact they can be imported, does not mean that all functions and types in the program can be used. For example, sometimes using some functions or types of the package will still trigger compiler errors.
| Package | Importable |
|---|---|
| archive/tar | ✗ no |
| archive/zip | ✗ no |
| bufio | ✔ yes |
| bytes | ✔ yes |
| compress/bzip2 | ✔ yes |
| compress/flate | ✔ yes |
| compress/gzip | ✔ yes |
| compress/lzw | ✔ yes |
| compress/zlib | ✔ yes |
| container/heap | ✔ yes |
| container/list | ✔ yes |
| container/ring | ✔ yes |
| context | ✔ yes |
| crypto | ✔ yes |
| crypto/aes | ✔ yes |
| crypto/cipher | ✔ yes |
| crypto/des | ✔ yes |
| crypto/dsa | ✔ yes |
| crypto/ecdsa | ✗ no |
| crypto/ed25519 | ✔ yes |
| crypto/elliptic | ✔ yes |
| crypto/hmac | ✔ yes |
| crypto/md5 | ✔ yes |
| crypto/rand | ✔ yes |
| crypto/rc4 | ✔ yes |
| crypto/rsa | ✗ no |
| crypto/sha1 | ✔ yes |
| crypto/sha256 | ✔ yes |
| crypto/sha512 | ✔ yes |
| crypto/subtle | ✔ yes |
| crypto/tls | ✗ no |
| crypto/x509 | ✗ no |
| crypto/x509/pkix | ✗ no |
| database/sql | ✔ yes |
| database/sql/driver | ✔ yes |
| debug/dwarf | ✔ yes |
| debug/elf | ✔ yes |
| debug/gosym | ✔ yes |
| debug/macho | ✔ yes |
| debug/pe | ✔ yes |
| debug/plan9obj | ✔ yes |
| encoding | ✔ yes |
| encoding/ascii85 | ✔ yes |
| encoding/asn1 | ✗ no |
| encoding/base32 | ✔ yes |
| encoding/base64 | ✔ yes |
| encoding/binary | ✔ yes |
| encoding/csv | ✔ yes |
| encoding/gob | ✗ no |
| encoding/hex | ✔ yes |
| encoding/json | ✗ no |
| encoding/pem | ✔ yes |
| encoding/xml | ✗ no |
| errors | ✔ yes |
| expvar | ✗ no |
| flag | ✔ yes |
| fmt | ✔ yes |
| go/ast | ✔ yes |
| go/build | ✗ no |
| go/constant | ✔ yes |
| go/doc | ✗ no |
| go/format | ✔ yes |
| go/importer | ✗ no |
| go/parser | ✔ yes |
| go/printer | ✔ yes |
| go/scanner | ✔ yes |
| go/token | ✔ yes |
| go/types | ✗ no |
| hash | ✔ yes |
| hash/adler32 | ✔ yes |
| hash/crc32 | ✔ yes |
| hash/crc64 | ✔ yes |
| hash/fnv | ✔ yes |
| hash/maphash | ✔ yes |
| html | ✔ yes |
| html/template | ✗ no |
| image | ✔ yes |
| image/color | ✔ yes |
| image/color/palette | ✔ yes |
| image/draw | ✔ yes |
| image/gif | ✔ yes |
| image/jpeg | ✔ yes |
| image/png | ✔ yes |
| index/suffixarray | ✔ yes |
| io | ✔ yes |
| io/ioutil | ✔ yes |
| log | ✔ yes |
| log/syslog | ✗ no |
| math | ✔ yes |
| math/big | ✔ yes |
| math/bits | ✔ yes |
| math/cmplx | ✔ yes |
| math/rand | ✔ yes |
| mime | ✔ yes |
| mime/multipart | ✗ no |
| mime/quotedprintable | ✔ yes |
| net | ✗ no |
| net/http | ✗ no |
| net/http/cgi | ✗ no |
| net/http/cookiejar | ✗ no |
| net/http/fcgi | ✗ no |
| net/http/httptest | ✗ no |
| net/http/httptrace | ✗ no |
| net/http/httputil | ✗ no |
| net/http/pprof | ✗ no |
| net/mail | ✗ no |
| net/rpc | ✗ no |
| net/rpc/jsonrpc | ✗ no |
| net/smtp | ✗ no |
| net/textproto | ✗ no |
| net/url | ✔ yes |
| os | ✔ yes |
| os/exec | ✗ no |
| os/signal | ✔ yes |
| os/user | ✗ no |
| path | ✔ yes |
| path/filepath | ✔ yes |
| plugin | ✔ yes |
| reflect | ✔ yes |
| regexp | ✔ yes |
| regexp/syntax | ✔ yes |
| sort | ✔ yes |
| strconv | ✔ yes |
| strings | ✔ yes |
| sync | ✔ yes |
| sync/atomic | ✔ yes |
| syscall | ✔ yes |
| syscall/js | ✔ yes |
| testing | ✔ yes |
| testing/iotest | ✗ no |
| testing/quick | ✗ no |
| text/scanner | ✔ yes |
| text/tabwriter | ✔ yes |
| text/template | ✗ no |
| text/template/parse | ✔ yes |
| time | ✔ yes |
| time/tzdata | ✔ yes |
| unicode | ✔ yes |
| unicode/utf16 | ✔ yes |
| unicode/utf8 | ✔ yes |
| unsafe | ✔ yes |
The compiler gave the following error when this package was imported:
# archive/tar /home/ron/.gvm/gos/go1.15/src/archive/tar/common.go:554:32: os.FileMode(fi.h.Mode).Perm undefined (type os.FileMode has no field or method Perm) /home/ron/.gvm/gos/go1.15/src/archive/tar/common.go:636:15: fi.ModTime undefined (type os.FileInfo has no field or method ModTime) /home/ron/.gvm/gos/go1.15/src/archive/tar/common.go:637:21: fm.Perm undefined (type os.FileMode has no field or method Perm) /home/ron/.gvm/gos/go1.15/src/archive/tar/common.go:640:10: fm.IsRegular undefined (type os.FileMode has no field or method IsRegular)
The compiler gave the following error when this package was imported:
# archive/zip /home/ron/.gvm/gos/go1.15/src/archive/zip/struct.go:180:19: fi.ModTime undefined (type os.FileInfo has no field or method ModTime)
The compiler gave the following error when this package was imported:
# encoding/asn1 encoding/asn1/: interp: unknown GEP
The compiler gave the following error when this package was imported:
# crypto/rsa
/home/ron/.gvm/gos/go1.15/src/math/big/nat.go:74:11: interp: unknown GEP
traceback:
/home/ron/.gvm/gos/go1.15/src/math/big/nat.go:84:19:
%9 = call { i32*, i32, i32 } @"(math/big.nat).setWord"(i32* %6, i32 %7, i32 %8, i32 %3, i8* undef, i8* undef), !dbg !1749
/home/ron/.gvm/gos/go1.15/src/math/big/int.go:55:25:
%17 = call { i32*, i32, i32 } @"(math/big.nat).setUint64"(i32* %14, i32 %15, i32 %16, i64 %2, i8* undef, i8* undef), !dbg !1755
/home/ron/.gvm/gos/go1.15/src/math/big/int.go:69:26:
%2 = call %"math/big.Int"* @"(*math/big.Int).SetInt64"(%"math/big.Int"* %0, i64 %x, i8* undef, i8* undef), !dbg !1739
crypto/rsa/:38:25:
%288 = call %"math/big.Int"* @"math/big.NewInt"(i64 0, i8* undef, i8* undef), !dbg !1867
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
The compiler gave the following error when this package was imported:
# encoding/asn1 encoding/asn1/: interp: unknown GEP
The compiler gave the following error when this package was imported:
# encoding/gob /home/ron/.gvm/gos/go1.15/src/encoding/gob/decode.go:562:21: MakeMapWithSize not declared by package reflect /home/ron/.gvm/gos/go1.15/src/encoding/gob/decode.go:948:22: PtrTo not declared by package reflect /home/ron/.gvm/gos/go1.15/src/encoding/gob/decode.go:1118:30: srt.FieldByName undefined (type reflect.Type has no field or method FieldByName) /home/ron/.gvm/gos/go1.15/src/encoding/gob/encode.go:603:16: PtrTo not declared by package reflect /home/ron/.gvm/gos/go1.15/src/encoding/gob/encode.go:643:70: f.Index undefined (type reflect.StructField has no field or method Index) /home/ron/.gvm/gos/go1.15/src/encoding/gob/type.go:119:12: cannot convert nil (untyped nil value) to reflect.Type /home/ron/.gvm/gos/go1.15/src/encoding/gob/type.go:142:14: PtrTo not declared by package reflect /home/ron/.gvm/gos/go1.15/src/encoding/gob/type.go:867:9: rt.PkgPath undefined (type reflect.Type has no field or method PkgPath) /home/ron/.gvm/gos/go1.15/src/encoding/gob/type.go:870:21: rt.PkgPath undefined (type reflect.Type has no field or method PkgPath)
The compiler gave the following error when this package was imported:
# encoding/json /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:160:15: cannot convert nil (untyped nil value) to reflect.Type /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:232:26: cannot convert nil (untyped nil value) to reflect.Type /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:249:30: cannot convert nil (untyped nil value) to reflect.Type /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:515:8: v.NumMethod undefined (type reflect.Value has no field or method NumMethod) /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:552:7: v.SetLen undefined (type reflect.Value has no field or method SetLen) /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:589:6: v.SetLen undefined (type reflect.Value has no field or method SetLen) /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:620:40: v.NumMethod undefined (type reflect.Value has no field or method NumMethod) /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:641:16: PtrTo not declared by package reflect /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:776:17: PtrTo not declared by package reflect /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:921:9: v.NumMethod undefined (type reflect.Value has no field or method NumMethod) /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:950:6: v.SetBytes undefined (type reflect.Value has no field or method SetBytes) /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:957:9: v.NumMethod undefined (type reflect.Value has no field or method NumMethod) /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:990:9: v.NumMethod undefined (type reflect.Value has no field or method NumMethod) /home/ron/.gvm/gos/go1.15/src/encoding/json/decode.go:1014:23: v.OverflowFloat undefined (type reflect.Value has no field or method OverflowFloat) [...more lines following...]
The compiler gave the following error when this package was imported:
# encoding/xml /home/ron/.gvm/gos/go1.15/src/encoding/xml/read.go:286:8: val.SetLen undefined (type reflect.Value has no field or method SetLen) /home/ron/.gvm/gos/go1.15/src/encoding/xml/read.go:402:6: v.SetLen undefined (type reflect.Value has no field or method SetLen) /home/ron/.gvm/gos/go1.15/src/encoding/xml/read.go:665:7: dst.SetBytes undefined (type reflect.Value has no field or method SetBytes) /home/ron/.gvm/gos/go1.15/src/encoding/xml/typeinfo.go:114:29: f.Index undefined (type *reflect.StructField has no field or method Index) /home/ron/.gvm/gos/go1.15/src/encoding/xml/typeinfo.go:318:14: typ.FieldByIndex undefined (type reflect.Type has no field or method FieldByIndex) /home/ron/.gvm/gos/go1.15/src/encoding/xml/typeinfo.go:319:14: typ.FieldByIndex undefined (type reflect.Type has no field or method FieldByIndex)
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
The compiler gave the following error when this package was imported:
panic: interp: load from a bitcast
goroutine 1 [running]:
github.com/tinygo-org/tinygo/interp.(*LocalValue).Load(0xc00b2a3010, 0xc00b2a3010)
/home/ron/Development/tinygo/tinygo/interp/values.go:61 +0x226
github.com/tinygo-org/tinygo/interp.(*LocalValue).Load(0xc00b2a3000, 0x7f040000001d)
/home/ron/Development/tinygo/tinygo/interp/values.go:58 +0x135
github.com/tinygo-org/tinygo/interp.(*frame).evalBasicBlock(0xc0092349b0, 0x7f0434e8cd00, 0x7f0434e8c870, 0xc00b2a4970, 0xc, 0x0, 0x0, 0xc00b205600, 0x1, 0x1, ...)
/home/ron/Development/tinygo/tinygo/interp/frame.go:98 +0xd785
github.com/tinygo-org/tinygo/interp.(*evalPackage).function(0xc0092374e0, 0x7f0428022488, 0xc007db5800, 0x9, 0x10, 0xc00b2a4970, 0xc, 0x10, 0xc00b2a2560, 0x0)
/home/ron/Development/tinygo/tinygo/interp/interp.go:113 +0x249
github.com/tinygo-org/tinygo/interp.(*frame).evalBasicBlock(0xc009235768, 0x7f0434ef43d0, 0x7f0434ef4040, 0xc00b29b9b8, 0x8, 0x0, 0x0, 0xc00b205458, 0x1, 0x1, ...)
/home/ron/Development/tinygo/tinygo/interp/frame.go:570 +0x6c7e
github.com/tinygo-org/tinygo/interp.(*evalPackage).function(0xc0092374e0, 0x7f0428023338, 0xc007f17880, 0x7, 0x8, 0xc00b29b9b8, 0x8, 0x8, 0xc00b289c40, 0x0)
/home/ron/Development/tinygo/tinygo/interp/interp.go:113 +0x249
[...more lines following...]
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
The compiler gave the following error when this package was imported:
# net /home/ron/.gvm/gos/go1.15/src/net/parse.go:80:12: st.ModTime undefined (type os.FileInfo has no field or method ModTime) /home/ron/.gvm/gos/go1.15/src/net/pipe.go:156:16: ErrDeadlineExceeded not declared by package os /home/ron/.gvm/gos/go1.15/src/net/pipe.go:169:16: ErrDeadlineExceeded not declared by package os /home/ron/.gvm/gos/go1.15/src/net/pipe.go:188:16: ErrDeadlineExceeded not declared by package os /home/ron/.gvm/gos/go1.15/src/net/pipe.go:204:17: ErrDeadlineExceeded not declared by package os
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
This package cannot be imported because the following dependencies cannot be compiled:
The compiler gave the following error when this package was imported:
# os/exec /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:130:14: Process not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:134:19: ProcessState not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:462:6: ProcessState not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:246:23: DevNull not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:258:20: Pipe not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:291:27: DevNull not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:303:20: Pipe not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:422:22: StartProcess not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:422:57: ProcAttr not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:584:20: Pipe not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:626:20: Pipe not declared by package os /home/ron/.gvm/gos/go1.15/src/os/exec/exec.go:651:20: Pipe not declared by package os
The compiler gave the following error when this package was imported:
# os/user /home/ron/.gvm/gos/go1.15/src/os/user/lookup.go:15:41: undeclared name: current /home/ron/.gvm/gos/go1.15/src/os/user/lookup.go:36:9: undeclared name: lookupUser /home/ron/.gvm/gos/go1.15/src/os/user/lookup.go:45:9: undeclared name: lookupUserId /home/ron/.gvm/gos/go1.15/src/os/user/lookup.go:51:9: undeclared name: lookupGroup /home/ron/.gvm/gos/go1.15/src/os/user/lookup.go:57:9: undeclared name: lookupGroupId /home/ron/.gvm/gos/go1.15/src/os/user/lookup.go:62:9: undeclared name: listGroups
The compiler gave the following error when this package was imported:
# testing/iotest
../../../../../tmp/tinygo-test.go:2:8: cannot find package "testing/iotest" in any of:
/home/ron/.cache/tinygo/goroot-go1.15-7afa574ac889bbfe1ced1698a5a8cef44acba21596cd94a64313a8cd1019f95d/src/testing/iotest (from $GOROOT)
/home/ron/.gvm/pkgsets/go1.15/global/src/testing/iotest (from $GOPATH)
The compiler gave the following error when this package was imported:
# testing/quick
../../../../../tmp/tinygo-test.go:2:8: cannot find package "testing/quick" in any of:
/home/ron/.cache/tinygo/goroot-go1.15-7afa574ac889bbfe1ced1698a5a8cef44acba21596cd94a64313a8cd1019f95d/src/testing/quick (from $GOROOT)
/home/ron/.gvm/pkgsets/go1.15/global/src/testing/quick (from $GOPATH)
The compiler gave the following error when this package was imported:
# text/template /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:377:20: val.Recv undefined (type reflect.Value has no field or method Recv) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:541:25: cannot convert nil (untyped nil value) to reflect.Type /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:603:19: ptr.MethodByName undefined (type reflect.Value has no field or method MethodByName) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:610:33: receiver.Type().FieldByName undefined (type reflect.Type has no field or method FieldByName) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:645:21: etyp.FieldByName undefined (type reflect.Type has no field or method FieldByName) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:678:9: typ.IsVariadic undefined (type reflect.Type has no field or method IsVariadic) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:679:18: typ.NumIn undefined (type reflect.Type has no field or method NumIn) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:681:79: typ.NumIn undefined (type reflect.Type has no field or method NumIn) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:683:25: typ.NumIn undefined (type reflect.Type has no field or method NumIn) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:684:69: typ.NumIn undefined (type reflect.Type has no field or method NumIn) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:688:71: typ.NumOut undefined (type reflect.Type has no field or method NumOut) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:695:32: typ.In undefined (type reflect.Type has no field or method In) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:698:9: typ.IsVariadic undefined (type reflect.Type has no field or method IsVariadic) /home/ron/.gvm/gos/go1.15/src/text/template/exec.go:699:18: typ.In undefined (type reflect.Type has no field or method In) [...more lines following...]