1 files changed, 55 insertions, 9 deletions
diff --git a/internal/rosa/meson.go b/internal/rosa/meson.go
index 25291dd0..59029595 100644
--- a/internal/rosa/meson.go
+++ b/internal/rosa/meson.go
@@ -3,6 +3,8 @@ package rosa
 import (
 	"slices"
 	"strings"
+
+	"hakurei.app/pkg"
 )
 
 var (
@@ -35,11 +37,54 @@ type MesonHelper struct {
 var _ Helper = new(MesonHelper)
 
 // tools returns hardcoded meson runtime dependencies.
-func (attr *MesonHelper) tools() P {
-	if !attr.isPython() {
-		return P{_muon}
+func (attr *MesonHelper) tools(t Toolchain) P {
+	m := _muon
+	if attr.isPython() {
+		m = _meson
+	}
+	if t.cross() {
+		return P{m, _qemu}
 	}
-	return P{_meson}
+	return P{m}
+}
+
+// paths returns the cross-compiler mfile, or nil if not cross-compiling.
+func (*MesonHelper) paths(t Toolchain) []pkg.ExecPath {
+	if !t.cross() {
+		return nil
+	}
+
+	arch, mesonArch, target := t.Arch(), t.linuxArch(), t.triple()
+	return []pkg.ExecPath{pkg.Path(
+		AbsSystem.Append("mfile"),
+		false, pkg.NewFile("mfile-"+arch, []byte(`# meson env2mfile
+[binaries]
+# Compilers
+c = ['clang', '--target=`+target+`', '--sysroot=/system/`+arch+`']
+cpp = ['clang++', '--target=`+target+`', '--sysroot=/system/`+arch+`']
+pkg-config = ['pkg-config']
+exe_wrapper = ['qemu-`+mesonArch+`', '-L', '/system/`+arch+`']
+
+# Other binaries
+ar = ['llvm-ar']
+ranlib = ['llvm-ranlib']
+strip = ['llvm-strip']
+
+[built-in options]
+
+[properties]
+sys_root = '/system/`+arch+`'
+pkg_config_libdir = '/system/`+arch+`/system/lib/pkgconfig'
+
+[host_machine]
+cpu = '`+mesonArch+`'
+cpu_family = '`+mesonArch+`'
+endian = 'little'
+system = 'linux'
+subsystem = 'linux'
+kernel = 'linux'
+`)),
+	)}
 }
 
 // inputs is a noop.
@@ -65,10 +110,6 @@ func (attr *MesonHelper) isPython() bool {
 
 // script generates the cure script.
 func (attr *MesonHelper) script(t Toolchain, name string) string {
-	if t.cross() {
-		panic(CrossError(name))
-	}
-
 	if attr == nil {
 		attr = new(MesonHelper)
 	}
@@ -109,8 +150,13 @@ func (attr *MesonHelper) script(t Toolchain, name string) string {
 		}
 	}
 
+	var setupArgs string
+	if t.cross() {
+		setupArgs += " --cross-file=/system/mfile"
+	}
+
 	return `
-` + muon + ` setup \
+` + muon + ` setup` + setupArgs + ` \
 	` + strings.Join(slices.Collect(func(yield func(string) bool) {
 		for _, v := range append([]KV{
 			{"wrap_mode", "nofallback"},