internal/rosa/make: expose --host

This should be set alongside --build.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/make.go

@@ -57,6 +57,8 @@ type MakeAttr struct {
 	Configure [][2]string
 	// Extra make targets.
 	Make []string
+	// Host target triple, zero value is equivalent to the Rosa OS triple.
+	Host string
 	// Target triple, zero value is equivalent to the Rosa OS triple.
 	Build string
 	// Whether to skip the check target.
@@ -88,6 +90,11 @@ func (t Toolchain) NewViaMake(
 	if attr == nil {
 		attr = new(MakeAttr)
 	}
+
+	host := `"${ROSA_TRIPLE}"`
+	if attr.Host != "" {
+		host = attr.Host
+	}
 	build := `"${ROSA_TRIPLE}"`
 	if attr.Build != "" {
 		build = attr.Build
@@ -99,6 +106,10 @@ func (t Toolchain) NewViaMake(
 /usr/src/` + name + `/configure \
 	--prefix=/system`
 
+		if attr.Host != `""` {
+			configure += ` \
+	--host=` + host
+		}
 		if attr.Build != `""` {
 			configure += ` \
 	--build=` + build