Substitute LDSCRIPT with real value

platformio/builder/tools/platformio.py

@@ -129,14 +129,7 @@ def BuildProgram(env):
 
     # append into the beginning a main LD script
     if env.get("LDSCRIPT_PATH") and not any("-Wl,-T" in f for f in env["LINKFLAGS"]):
-        env.Prepend(
-            LINKFLAGS=[
-                "-T",
-                env["LDSCRIPT_PATH"]
-                if os.path.isfile(env["LDSCRIPT_PATH"])
-                else "$LDSCRIPT_PATH",
-            ]
-        )
+        env.Prepend(LINKFLAGS=["-T", env.subst("$LDSCRIPT_PATH")])
 
     # enable "cyclic reference" for linker
     if env.get("LIBS") and env.GetCompilerType() == "gcc":