Missing textflag.h

[Jacob Prosser]

I'm trying to install de but get an error:

# golang.org/x/exp/shiny/driver/internal/swizzle
go/src/golang.org/x/exp/shiny/driver/internal/swizzle/swizzle_amd64.s:5:10: fatal error: textflag.h: No such file or directory
    5 | #include "textflag.h"
      |          ^~~~~~~~~~~~
compilation terminated.```

[Dave MacFarlane]

what version of Go are you using on what platform? As far as I know textflag.h should come with Go itself.

[Jacob Prosser]

go version go1.12.2 gccgo (GCC) 9.1.0 linux/amd64