Doh! I forgot the include. I get a linker error now:
...
package main
/*
#cgo pkg-config: python3
#cgo LDFLAGS: -lpython3.8
#include <Python.h>
*/
import "C"
import (
"fmt"
)
func main() {
C.Py_Initialize()
fmt.Println(C.GoString(C.Py_GetVersion()))
C.Py_Finalize()
}
...
$ go run .
# producer
/usr/local/go/pkg/tool/darwin_amd64/link: running clang failed: exit status
1
ld: library not found for -lpython3.8
clang: error: linker command failed with exit code 1 (use -v to see
invocation)
...
Clearly a library is missing but I'm not clear where to find it or how to
inform the linker. Thanks.
On Wednesday, November 23, 2022 at 6:48:25 PM UTC-8 Deiter wrote:
> macOS: 12.5.1
> go: go1.19.3 darwin/amd64
>
> I'm having trouble building a go module that uses Python as a shared
> library.
>
> This code works:
> ...
> package main
>
> // #include <float.h>
> import "C"
> import "fmt"
>
> func main() {
> fmt.Println("Max float value of float is", C.FLT_MAX)
> }
> ...
> $ go run .
> Max float value of float is 3.4028234663852886e+38
> ...
> I run into problems when I try to include Python:
> ...
> package main
>
> /*
> #cgo pkg-config: python3
> #cgo LDFLAGS: -lpython3.8
> */
> import "C"
>
> import (
> "fmt"
> )
>
> func main() {
> C.Py_Initialize()
> fmt.Println(C.GoString(C.Py_GetVersion()))
> C.Py_Finalize()
> }
> ...
> $ go run .
> # producer
> ./producer.go:16:2: could not determine kind of name for C.Py_Finalize
> ./producer.go:15:25: could not determine kind of name for C.Py_GetVersion
> ./producer.go:14:2: could not determine kind of name for C.Py_Initialize
> ...
>
> Any suggestions? I'm guessing it has something to do w/ setting
> PKG_CONFIG_PATH and/or CGO_CFLAGS but I'm not certain...
>
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