Go 32-bit compilation fails when grumpc run on a 64-bit system

[luca76]

See this error:

  [grumpy] $ make

build/src/grumpy/lib/time_test/module.go:59: constant 3000000000 overflows int
Makefile:212: recipe for target 'build/pkg/linux_386/grumpy/lib/time_test.a' failed
make: *** [build/pkg/linux_386/grumpy/lib/time_test.a] Error 1

How can I fix it?

[trotterdylan]

That's weird. The compiler is emitting NewInt(3000000000) because the ast module produced a Python int here. So 3000000000 fits in an int in Python which suggests the architecture is 64-bit. But when the Go code is compiled, it's saying the number overflows int, so Go seems to be compiling for 32-bit.

Is your environment set up for some cross compilation or something like that?

[luca76]

Yes, I have Go in 32 bit mode and the OS is in 64.

[trotterdylan]

I see. We don't support cross compilation of that kind currently. The basic technical problem is that the Python code generator assumes that a Python int on the host platform can be stored as a native int on the target platform. We would have to add some awareness to the grumpc compiler to support this use case.

[luca76]

Thank you in advance. Now I can close this bug report.

[trotterdylan]

I think it's okay to leave this open. I'm sure it will come up again and supporting cross compilation seamlessly would be nice.

[xyproto]

When building the latest master commit of Grumpy (2c8ff4b) for 32-bit Arch Linux (in a chroot, but on a 64-bit host system), I get the following error messages when running make:

 make: Entering directory '/build/grumpy/src/grumpy'
# __python__/__go__/syscall
build/src/__python__/__go__/syscall/module.go:943:54: constant 2147483648 overflows int
build/src/__python__/__go__/syscall/module.go:3215:54: constant 4278190080 overflows int
build/src/__python__/__go__/syscall/module.go:3235:54: constant 4294901760 overflows int
build/src/__python__/__go__/syscall/module.go:3250:54: constant 4294967040 overflows int
build/src/__python__/__go__/syscall/module.go:3355:54: constant 2147483648 overflows int
build/src/__python__/__go__/syscall/module.go:4170:54: constant 2309737967 overflows int
build/src/__python__/__go__/syscall/module.go:4175:54: constant 3454992675 overflows int
build/src/__python__/__go__/syscall/module.go:4195:54: constant 2712847316 overflows int
build/src/__python__/__go__/syscall/module.go:4200:54: constant 3489725666 overflows int
build/src/__python__/__go__/syscall/module.go:4205:54: constant 4276215469 overflows int
build/src/__python__/__go__/syscall/module.go:4205:54: too many errors
make: *** [Makefile:260: build/pkg/linux_386/__python__/__go__/syscall.a] Error 2
make: *** Waiting for unfinished jobs....
# __python__/__go__/math
build/src/__python__/__go__/math/module.go:263:54: constant 9223372036854775807 overflows int
build/src/__python__/__go__/math/module.go:278:54: constant 4294967295 overflows int
build/src/__python__/__go__/math/module.go:308:54: constant -9223372036854775808 overflows int
make: *** [Makefile:259: build/pkg/linux_386/__python__/__go__/math.a] Error 2
make: Leaving directory '/build/grumpy/src/grumpy'

This is with Python 2.7.13 and Go 1.9.