Build Error on Ubuntu

[charles-d-burton]

Installed using the .deb package for ubuntu. I'm getting the following permissions error, it's easy enough to fix, just posting this here because I think the .deb needs the permissions updated

❯ tinygo build -target pico -o test.u2f
tinygo:ld.lld: error: cannot open /usr/local/lib/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/compiler-rt/lib.a: Permission denied
tinygo:ld.lld: error: cannot open /usr/local/lib/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/picolibc/lib.a: Permission denied
failed to run tool: ld.lld
error: failed to link /tmp/tinygo157798778/main: exit status 1
❯ tinygo version
tinygo version 0.22.0 linux/amd64 (using go version go1.17.7 and LLVM version 13.0.0)

The permissions on those files are set to read by root onlY

❯ ls -l /usr/local/lib/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/picolibc/lib.a
-rw------- 1 root root 705066 Jan 25 19:00 /usr/local/lib/tinygo/pkg/thumbv6m-unknown-unknown-eabi-cortex-m0plus/picolibc/lib.a

[charles-d-burton]

I fixed it locally with the following command

❯ sudo find /usr/local/lib/tinygo/pkg/ -type f | sudo xargs chmod 644
❯ tinygo build -target pico -o test.u2f

[dankegel]

Confirming present in 0.21 and 0.22 (but not in 0.20, which didn't contain those files):

$ wget https://github.com/tinygo-org/tinygo/releases/download/v0.22.0/tinygo_0.22.0_amd64.deb
$ ar x tinygo_0.22.0_amd64.deb 
$ tar tvf data.tar.gz | grep ".-----"
-rw------- 0/0          401872 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv6m-unknown-unknown-eabi/compiler-rt/lib.a
drwx------ 0/0               0 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv6m-unknown-unknown-eabi/picolibc/include/
-rw------- 0/0          764890 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv6m-unknown-unknown-eabi/picolibc/lib.a
-rw------- 0/0          387320 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv7em-unknown-unknown-eabi/compiler-rt/lib.a
drwx------ 0/0               0 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv7em-unknown-unknown-eabi/picolibc/include/
-rw------- 0/0          744574 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv7em-unknown-unknown-eabi/picolibc/lib.a
-rw------- 0/0          387376 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv7m-unknown-unknown-eabi/compiler-rt/lib.a
drwx------ 0/0               0 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv7m-unknown-unknown-eabi/picolibc/include/
-rw------- 0/0          744050 2021-11-18 05:31 ./usr/local/lib/tinygo/pkg/armv7m-unknown-unknown-eabi/picolibc/lib.a

[dankegel]

Fun fact: mac ar cannot deal with those debs because they mistakenly have a slash after the filenames. Might be an fpm issue...

[dankegel]

Looks like original sin is committed by tinygo itself?

$ umask
0002
$ strace -o slog -e trace=file -f ./build/tinygo build-library -target=cortex-m4     -o build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/picolibc    picolibc
...
88138 mkdirat(AT_FDCWD, "build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/picolibc", 0775) = 0
...
88138 mkdirat(AT_FDCWD, "build/release/tinygo/pkg/thumbv7em-unknown-unknown-eabi-cortex-m4/picolibc/include", 0700) = 0

Somehow "tinygo build-library" is using the wrong permissions when creating that include directory?

[aykevl]

So it appears that the underlying cause is that we use os.TempFile files which are created with very restricted permissions and we simply copy those files with the same permissions. I think we should loosen up those permissions a bit.