eclass/go-env.eclass: add helper to set compile env

This change adds a helper function to explicitly set CC, CXX, and
GOARCH, and carrying over CFLAGS, LDFLAGS and friends to CGO
equivalents, to provide a minimal sane compile environment for Go.
It enables Go builds to play nice with crossdev's wrappers for
emerge/ebuild etc. Previously, Go ebuilds emitted binaries for the host
architecture.

For example, when running on an x86_64 host:
   emerge-aarch64-cross-linux-gnu foo
will now correctly emerge Go package "foo" for aarch64 instead of
x86_64.

The eclass provides a single helper function
    go-env_set_compile_environment()
intended to be called by other Go eclasses in an early build stage.
Ebuilds may also explicitly call this function.

Signed-off-by: Thilo Fromm <thilo.alexander@gmail.com>
Signed-off-by: James Le Cuirot <chewi@gentoo.org>

0 files changed, 0 insertions, 0 deletions