update sources to v_C18, build config to v_C17 (no build containing C18 is available at this point)
diff --git a/org.eclipse.jdt.core/.settings/org.eclipse.core.runtime.prefs b/org.eclipse.jdt.core/.settings/org.eclipse.core.runtime.prefs
new file mode 100644
index 0000000..5a0ad22
--- /dev/null
+++ b/org.eclipse.jdt.core/.settings/org.eclipse.core.runtime.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+line.separator=\n