Unable to compile Go package

[guneemwelloeux]

After retrieving the package with go get github.com/keysight/clipsgo, I tried to build the whole package, and got the following error:

go build -o clipsgo ./cmd/clipsgo
# github.com/keysight/clipsgo/pkg/clips
pkg/clips/callback.go:5:11: fatal error: clips/clips.h: No such file or directory
    5 | // #include <clips/clips.h>
      |           ^~~~~~~~~~~~~~~
compilation terminated.
make: *** [Makefile:38: clipsgo] Error 2

The compilation of clips itself went fine, and the sources are available in go/src/github.com/keysight/clipsgo/clips_source

I'm using go version go1.13.8 linux/amd64 on Ubuntu 20.04 LTS.

Thanks

[guneemwelloeux]

Taking callback.go as an example. The 3 cgo lines show:

// #cgo CFLAGS: -I ../../clips_source
// #cgo LDFLAGS: -L ../../clips_source -l clips -lm                                                                     
// #include "clips/clips.h"                                                                                             

It seems that it won't work, because ../../clips_source resolves to $GOPATH/src/github.com/keysight/clipsgo/clips_source, in that folder, there is no clips folder.

So either the -I flag is wrong, or the include is wrong.

However, no matter how I tried to modify these, to point to the actual clips.h file, I couldn't get it to compile with go tool cgo callback.go.

It looks like the -I flag is completely ignored.

I finally got the compilation to work properly by pointing the include directly to the actual file:

~ // #cgo LDFLAGS: -L ../../clips_source -l clips -lm                                                                     
~ // #include "../../clips_source/clips.h"                                                                                

Is cgo broken? or is the directive not the correct one?

[guneemwelloeux]

I was able to finally compile using go version go1.16.2 linux/amd64, and changing the CFLAGS in callback.go, as well as adding a clips symlink to clips_source in the clipsgo directory.

// #cgo CFLAGS: -I ../..

[kraney]

Unfortunately I have changed jobs and no longer have maintenance rights on this repo.

I was able to build without modifications, but I obtained the repo with git clone rather than go get. Not sure if that might be the difference.

[guneemwelloeux]

Hello @kraney

I'm still experiencing compilation issues, unfortunately.

Here is what I tried today (Note that I'm only assuming that this is the way to build, as the README does not explicitely tell how this step should be done)

~$ git clone ssh://git@github.com/keysight/clipsgo.git
~$ cd clipsgo
~/clipsgo$ make

Again, I'm still getting the same error:

...[successful compilation lines redacted]
gcc -o clips main.o -L. -lclips -lm -lrt
make[1]: Leaving directory '/home/pollux/clipsgo/clips_source'
ld -G clips_source/*.o -o clips_source/libclips.so
go build -o clipsgo ./cmd/clipsgo
# github.com/keysight/clipsgo/pkg/clips
pkg/clips/callback.go:5:11: fatal error: clips/clips.h: No such file or directory
    5 | // #include <clips/clips.h>
      |           ^~~~~~~~~~~~~~~
compilation terminated.
make: *** [Makefile:38: clipsgo] Error 2

The sources of clips are properly downloaded by the make process, and the clips shared lib libclips.so is built successfully.
The only step that seems to fail is the go compilation itself. And it all seems logical to me, given the CFLAGS specified in the go files.

Also note that I don't have clips installed on my system, so I'm solely relying on the make process to use whatever sources are being downloaded.

@Keysight: Is this project dead? If not, could you please let me know who the maintainer is?

[mattsmi]

I have forked the repository as it does not seem to be maintained by the original author.
Go here to find a working version, including instructions for building the executable or using clipsgo in your own Go code.