LOCALAPPDATA, APPDATA and USERPROFILE should only work on Windows.
diff --git a/MagickCore/opencl.c b/MagickCore/opencl.c
index 9e65361..dd1b29a 100644
--- a/MagickCore/opencl.c
+++ b/MagickCore/opencl.c
@@ -298,12 +298,14 @@
if (home == (char *) NULL)
{
home=GetEnvironmentValue("XDG_CACHE_HOME");
+#if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__MINGW32__)
if (home == (char *) NULL)
home=GetEnvironmentValue("LOCALAPPDATA");
if (home == (char *) NULL)
home=GetEnvironmentValue("APPDATA");
if (home == (char *) NULL)
home=GetEnvironmentValue("USERPROFILE");
+#endif
}
if (home != (char *) NULL)