internal/rosa: patch library paths

This removes the need for reference LDFLAGS in the standard toolchain.

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

internal/rosa/rosa.go

@@ -65,10 +65,9 @@ const (
 	EnvTriplet = "ROSA_TRIPLE"
 )
 
-// ldflags returns LDFLAGS corresponding to triplet.
-func ldflags(static bool) string {
-	s := "LDFLAGS=" +
-		"-fuse-ld=lld " +
+// earlyLDFLAGS returns LDFLAGS corresponding to triplet.
+func earlyLDFLAGS(static bool) string {
+	s := "-fuse-ld=lld " +
 		"-L/system/lib -Wl,-rpath=/system/lib " +
 		"-L/system/lib/" + triplet() + " " +
 		"-Wl,-rpath=/system/lib/" + triplet() + " " +
@@ -76,7 +75,7 @@ func ldflags(static bool) string {
 		"-unwindlib=libunwind " +
 		"-Wl,--as-needed"
 	if !static {
-		s += " -Wl,--dynamic-linker=/system/lib/ld-musl-x86_64.so.1"
+		s += " -Wl,--dynamic-linker=/system/bin/linker"
 	}
 	return s
 }
@@ -199,7 +198,7 @@ ln -vs ../usr/bin /work/bin
 		env = fixupEnviron(env, []string{
 			EnvTriplet + "=" + triplet(),
 			lcMessages,
-			ldflags(true),
+			"LDFLAGS=" + earlyLDFLAGS(true),
 		}, "/system/bin",
 			"/usr/bin",
 			"/usr/lib/llvm/21/bin",
@@ -220,8 +219,6 @@ ln -vs ../usr/bin /work/bin
 			EnvTriplet + "=" + triplet(),
 			lcMessages,
 
-			ldflags(false),
-
 			"AR=ar",
 			"RANLIB=ranlib",
 			"LIBCC=/system/lib/clang/21/lib/" + triplet() +