internal/rosa/meson: support cross-compilation

Meson does not want to play nice and accept arguments or environment
variables for cross-compiling configuration, so a so-called mfile had
to be generated and placed here.

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

1 files changed, 14 insertions, 3 deletions

diff --git a/internal/rosa/rosa.go b/internal/rosa/rosa.go
index 27f31ecf..2448f203 100644
--- a/internal/rosa/rosa.go
+++ b/internal/rosa/rosa.go
@@ -214,6 +214,7 @@ var (
 	_toyboxEarly = H("toybox-early")
 	_llvm        = H("llvm")
 	_patch       = H("patch")
+	_qemu        = H("qemu")
 )
 
 // HasStageEarly returns whether a stage0 distribution is available.
@@ -281,7 +282,7 @@ const helperInPlace = "\x00"
 // Helper is a build system helper for [Toolchain.New].
 type Helper interface {
 	// tools returns helper-specific tool handles.
-	tools() P
+	tools(t Toolchain) P
 	// inputs returns helper-specific input handles.
 	inputs() P
 
@@ -301,6 +302,13 @@ type Helper interface {
 	script(t Toolchain, name string) string
 }
 
+// pathsHelper is a [Helper] with additional paths added to the container.
+type pathsHelper interface {
+	Helper
+
+	paths(t Toolchain) []pkg.ExecPath
+}
+
 // PackageAttr holds build-system-agnostic attributes.
 type PackageAttr struct {
 	// Measure output if populated. Required by HostNet.
@@ -515,7 +523,7 @@ func (t Toolchain) New(
 		if cross {
 			spv = paGet()
 		}
-		for _, p := range helper.tools() {
+		for _, p := range helper.tools(t) {
 			root = native.appendHandle(root, pv, p)
 		}
 
@@ -600,6 +608,9 @@ cd '/usr/src/` + name + `/'
 			)),
 		})
 	}
+	if ph, ok := helper.(pathsHelper); ok {
+		paths = append(paths, ph.paths(t)...)
+	}
 
 	bin := attr.Bin
 	if attr.PopulateUsrBin {
@@ -682,7 +693,7 @@ type GenericHelper struct {
 var _ Helper = new(GenericHelper)
 
 // tools is a noop.
-func (*GenericHelper) tools() P { return nil }
+func (*GenericHelper) tools(Toolchain) P { return nil }
 
 // inputs is a noop.
 func (*GenericHelper) inputs() P { return nil }