The .go file can just be a dummy file with no real purpose? On Wednesday, April 12, 2017 at 5:06:35 PM UTC-7, Ian Lance Taylor wrote: > > On Wed, Apr 12, 2017 at 4:42 PM, larry104 <larg.w...@gmail.com > <javascript:>> wrote: > > > > I seems I need to manually run swig (swig -go -cgo -c++ -intgosize 64 > > mylib.i) - it does not seem that 'go build' picks up the .i or .swig > file. > > Then I need to call 'go tool cgo mylib.go'. This creates an _obj > directory > > with a bunch of files. After that I tried calling 'go build'. This > errors > > out when my c++ code refers to some 3d party libs. How can I tell 'go > build' > > additional flags for compiling and linking like -I and -L flags? > > When the go tool sees a .swig (for C) or .swigcxx (for C++) file, it > will invoke SWIG itself. The file should be in the same directory as > the Go sources for the package. See > https://golang.org/cmd/go/#hdr-Calling_between_Go_and_C . Note that > there must be at least one .go files in the directory, and it needs to > be in a proper GOPATH directory. > > Nevertheless, it should work to run SWIG yourself. But running `go > tool cgo` yourself is just going to end in tears. You're going to > need to let the go tool run cgo on your behalf. > > To get -I and -L options, add a .go files that uses import "C" and > #cgo CFLAGS and #cgo LDFLAGS. See https://golang.org/cmd/cgo and > https://github.com/golang/go/issues/6696#issuecomment-89016670 . > > Ian >
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