On Thu, Nov 23, 2023 at 05:31:59PM +0800, WANG Xuerui wrote:
> This is necessary for the build artifact to conform to the configured
> ISA level and features on those arches. The logic is also taken from
> the dev-lang/go ebuild.
> 
> Signed-off-by: WANG Xuerui <xen0n@gentoo.org>
> ---
>  eclass/go-env.eclass | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/eclass/go-env.eclass b/eclass/go-env.eclass
> index 08e3cf498a70..4bc8c4b15c65 100644
> --- a/eclass/go-env.eclass
> +++ b/eclass/go-env.eclass
> @@ -19,6 +19,8 @@ inherit toolchain-funcs
>  # @FUNCTION: go-env_set_compile_environment
>  # @DESCRIPTION:
>  # Set up basic compile environment: CC, CXX, and GOARCH.
> +# Necessary platform-specific settings such as GOARM or GO386 are also set
> +# according to the Portage configuration when building for those architectures.
>  # Also carry over CFLAGS, LDFLAGS and friends.
>  # Required for cross-compiling with crossdev.
>  # If not set, host defaults will be used and the resulting binaries are host arch.
> @@ -28,6 +30,9 @@ go-env_set_compile_environment() {
>  	tc-export CC CXX
>  
>  	export GOARCH="$(go-env_goarch)"
> +	use arm && export GOARM=$(go-env_goarm)
> +	use x86 && export GO386=$(usex cpu_flags_x86_sse2 '' 'softfloat')

cpu_flags_x86_sse2 is not an IUSE_IMPLICIT, meaning that emerging a
package without it in IUSE for x86 will result in:

 * ERROR: x11-terms/kitty-0.31.0::gentoo failed (compile phase):
 *   USE Flag 'cpu_flags_x86_sse2' not in IUSE for x11-terms/kitty-0.31.0

> +
>  	export CGO_CFLAGS="${CGO_CFLAGS:-$CFLAGS}"
>  	export CGO_CPPFLAGS="${CGO_CPPFLAGS:-$CPPFLAGS}"
>  	export CGO_CXXFLAGS="${CGO_CXXFLAGS:-$CXXFLAGS}"
> @@ -57,4 +62,20 @@ go-env_goarch() {
>  	esac
>  }
>  
> +# @FUNCTION: go-env_goarm
> +# @USAGE: [CHOST-value]
> +# @DESCRIPTION:
> +# Returns the appropriate GOARM setting for the CHOST given, or the default
> +# CHOST.
> +go-env_goarm() {
> +	case "${1:-${CHOST}}" in
> +		armv5*)	echo 5;;
> +		armv6*)	echo 6;;
> +		armv7*)	echo 7;;
> +		*)
> +			die "unknown GOARM for ${1:-${CHOST}}"
> +			;;
> +	esac
> +}
> +
>  fi
> -- 
> 2.42.1
> 
> 

-- 
ionen