How to verify whether gollvm is picked

[Kavindu Gimhan Zoysa]

Hi all,

I have ran the commands in https://go.googlesource.com/gollvm/#installing, (I did not run `ninja install-gollvm`). Then I set the path of bin folder to my $PATH using `export PATH=<PATH_TO_INSTALLATION>build-debug/bin:$PATH`.

Finally, I was able to run `go build/run test.go` successfully. 

But my problem is since I have already installed golang to my machine before install gollvm, how do I verify that go build command picked gollvm, instead of golang's compiler?

Thank you,

Kavindu

[Ian Lance Taylor]

Run "go version" and look for "gccgo" or "gollvm" in the output.

Or, run "go build -x" to see exactly what commands it is running.

Ian

[Kavindu Gimhan Zoysa]

Thank you. In `go version` command I cannot see `gccgo` or `gollvm`

But in `go build -x` command has mentioned that, `llvm-goc` is running located at `/usr/local/bin`.

[eric...@arm.com]

I don't know why you can't see 'gccgo' or 'gollvm', on my machine,

For main Go,

$ go version

go version go1.16.2 linux/arm64

For gccgo,

$ go version

go version go1.14.2 gccgo (GCC) 11.0.0 20200603 (experimental) linux/arm64

For gollvm,

$ go version

go version go1.16.5 gollvm LLVM 13.0.0git linux/amd64

[Than McIntosh]

If would help if you could share your exact cmake invocation I think. 

If your cmake invocation looks like

cmake \

   -DCMAKE_BUILD_TYPE=RelWithDebInfo \
   -DCMAKE_INSTALL_PREFIX=/tmp/myinstall \
   -DCMAKE_C_COMPILER=/usr/bin/clang-10 \
   -DCMAKE_ASM_COMPILER=/usr/bin/clang-10 \
   -DCMAKE_CXX_COMPILER=/usr/bin/clang++-10 \
   -G Ninja ../llvm-project/llvm

Then you should be prepending /tmp/myinstall/bin to your path.

Thanks, Than

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[Kavindu Gimhan Zoysa]

Is that okay if I change `/usr/bin/clang-10` to `/usr/bin/clang-11`? Because I have installed clang-11.

Thank you,

Kavindu

[Kavindu Gimhan Zoysa]

Now `go version` command shows the follwing output

go version

go: Symbol `syscall..types' has different size in shared object, consider re-linking

go: Symbol `runtime..types' has different size in shared object, consider re-linking

go version go1.15.3 gollvm LLVM 11.0.1 linux/amd64

It has picked gollvm properly.

Thank you all