I was trying to build https://github.com/systemfreund/go-libshout which wraps the C libshout library with Go. On Linux this worked fine, but on OpenBSD this was a bit more of a challenge as cgo could not find libshout. (install libshout with pkg_add first)
Although -lshout is specified as an LDFLAG in the go source code, I needed to to specify the include path for libshout and also link to libspeex (-lsppex)
CFLAGS and LDFLAGS can be passed to go build as environmental variables so I set:
export CGO_CFLAGS='-I/usr/local/include' export CGO_LDFLAGS='-L/usr/local/lib -lshout -lspeex'
Then I is was able to do
go build -x github.com/systemfreund/go-libshout
(the -x is very useful for checking was gets passed to cgo)