On Tue, Aug 29, 2017 at 2:24 PM, Adrian Sampaleanu <nman...@gmail.com> wrote:
>
> I'm on Windows 10, 64 bit, with MinGW's gcc 7.2.0. The code I pasted isn't
> relevant - I just pasted the first example from the Go blog, on cgo, as a
> sanity check. I've now checked the "stdio" cgo sample that ships with the Go
> distribution and that works fine.
Is it possible that on the version of GCC you are using with MinGW
that <stdlib.h> does not declare random and srandom?
Ian
> On Tuesday, August 29, 2017 at 5:09:50 PM UTC-4, Ian Lance Taylor wrote:
>>
>> On Tue, Aug 29, 2017 at 1:24 PM, Adrian Sampaleanu <nma...@gmail.com>
>> wrote:
>> >
>> > When running "go build" on the following code:
>> >
>> > package main
>> >
>> > // #include <stdlib.h>
>> > import "C"
>> >
>> > func Random() int {
>> > return int(C.random())
>> > }
>> >
>> > func Seed(i int) {
>> > C.srandom(C.uint(i))
>> > }
>> >
>> > func main() {
>> > }
>> >
>> >
>> > I get this output:
>> > .\main.go:7:13: could not determine kind of name for C.random
>> > .\main.go:11:2: could not determine kind of name for C.srandom
>> >
>> > Having never used cgo before, I'm not sure if I'm doing something wrong,
>> > but
>> > I don't see the problem. Am I hitting this
>> > (https://github.com/golang/go/issues/21668) ?
>>
>> I doubt this is issue 21668, which is specific to certain names. I'm
>> not sure what the problem is. Your test case works for me. What
>> system are you running on? What is your C compiler?
>>
>> (Note that you can use the math/rand package to get pseudo-random
>> numbers, no need to use cgo for that.)
>>
>> Ian
>
>
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