go-nlopt / nlopt Goto Github PK

I'd like to perform nonlinear optimization (without a Jacobian) and with both equality and inequality constraints is this possible?

In order to make this library easier to use from most places, I'm wondering if statically linking nlopt is better. wasmer for go does this https://github.com/wasmerio/wasmer-go/blob/master/wasmer/cgo.go. It also allows doing this in a custom way https://github.com/wasmerio/wasmer-go/blob/master/wasmer/cgo_with_custom_wasmer_runtime.go. We could do something similar with the default being static and then dynamic being chosen.

I could put a PR for this but I wanted to get input first since it's a larger change with consequences.

After having go-nlopt/nlopt working for quite a while, it is now broken. Since the last commits a few days ago, after I
go get -u github.com/go-nlopt/nlopt

I get

# github.com/go-nlopt/nlopt
/usr/bin/ld: $WORK/b001/_x002.o: in function `_cgo_0ecb1bc70fc3_Cfunc_nlopt_get_param':
/tmp/go-build/cgo-gcc-prolog:404: undefined reference to `nlopt_get_param'
/usr/bin/ld: $WORK/b001/_x002.o: in function `_cgo_0ecb1bc70fc3_Cfunc_nlopt_has_param':
/tmp/go-build/cgo-gcc-prolog:538: undefined reference to `nlopt_has_param'
/usr/bin/ld: $WORK/b001/_x002.o: in function `_cgo_0ecb1bc70fc3_Cfunc_nlopt_nth_param':
/tmp/go-build/cgo-gcc-prolog:558: undefined reference to `nlopt_nth_param'
/usr/bin/ld: $WORK/b001/_x002.o: in function `_cgo_0ecb1bc70fc3_Cfunc_nlopt_num_params':
/tmp/go-build/cgo-gcc-prolog:577: undefined reference to `nlopt_num_params'
/usr/bin/ld: $WORK/b001/_x002.o: in function `_cgo_0ecb1bc70fc3_Cfunc_nlopt_set_param':
/tmp/go-build/cgo-gcc-prolog:921: undefined reference to `nlopt_set_param'
collect2: error: ld returned 1 exit status

Any ideas? It has happened to all the users of the package that I make that makes use of go-nlopt/nlopt (a variety of ubuntu, fedora, installations). So it seems to be something more broad than just my own machine.

Thanks!

HI:
I want to debug go-nlopt in the Windows environment, but I didn't run it. I don't know how to set up the running environment.

Gcc version 11.2.0

Mingw get version 0.6.2 beta 20131004-1

I downloaded NLopt. v2.6.1x86_ 64-w64-mingw32.tar.gz, but I don't know how to load it into go-nlopt. Can the author provide me with some help using it? Thank you very much!