internal/rosa: diffutils artifact

LLVM tests are not happy with busybox diff.

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

internal/rosa/gnu.go

@@ -110,3 +110,32 @@ make DESTDIR=/work install
 		pkg.TarGzip,
 	)))
 }
+
+// NewDiffutils returns a [pkg.Artifact] containing an installation of GNU diffutils.
+func (t Toolchain) NewDiffutils() pkg.Artifact {
+	const (
+		version  = "3.12"
+		checksum = "9J5VAq5oA7eqwzS1Yvw-l3G5o-TccUrNQR3PvyB_lgdryOFAfxtvQfKfhdpquE44"
+	)
+	return t.New("diffutils-"+version, []pkg.Artifact{
+		t.NewMake(),
+	}, nil, nil, `
+cd /usr/src/diffutils
+test_disable() { chmod +w "$2" && echo "$1" > "$2"; }
+
+test_disable '#!/bin/sh' gnulib-tests/test-c32ispunct.sh
+test_disable 'int main(){return 0;}' gnulib-tests/test-c32ispunct.c
+
+cd "$(mktemp -d)"
+/usr/src/diffutils/configure \
+	--prefix=/system \
+	--build="${ROSA_TRIPLE}"
+make "-j$(nproc)" check
+make DESTDIR=/work install
+`, pkg.Path(AbsUsrSrc.Append("diffutils"), true, pkg.NewHTTPGetTar(
+		nil,
+		"https://ftp.gnu.org/gnu/diffutils/diffutils-"+version+".tar.gz",
+		mustDecode(checksum),
+		pkg.TarGzip,
+	)))
+}

internal/rosa/llvm.go

@@ -127,6 +127,8 @@ func (t Toolchain) newLLVM(variant string, attr *llvmAttr) pkg.Artifact {
 	extra := []pkg.Artifact{
 		t.NewLibffi(),
 		t.NewPython(),
+		t.NewPerl(),
+		t.NewDiffutils(),
 		t.NewKernelHeaders(),
 	}
 	if t == toolchainStage3 {