Report an error on the use of the line continuation character

src/compiler/preprocessor/cpp.c

@@ -188,12 +188,9 @@ static int CPPdefine(yystypepp * yylvalpp)
 	}
     mac.body = NewTokenStream(GetAtomString(atable, name), macros->pool);
     while (token != '\n') {
-        while (token == '\\') {
-            token = cpp->currentInput->scan(cpp->currentInput, yylvalpp);
-            if (token == '\n')
-                token = cpp->currentInput->scan(cpp->currentInput, yylvalpp);
-            else
-                RecordToken(mac.body, '\\', yylvalpp);
+        if (token == '\\') {
+            CPPErrorToInfoLog("The line continuation character (\\) is not part of the OpenGL ES Shading Language");
+            return token;
         }
         RecordToken(mac.body, token, yylvalpp);
         token = cpp->currentInput->scan(cpp->currentInput, yylvalpp);

src/compiler/preprocessor/scanner.c

@@ -664,10 +664,8 @@ static int byte_scan(InputSrc *in, yystypepp * yylvalpp)
             ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
             while (ch != '"' && ch != '\n' && ch != EOF) {
                 if (ch == '\\') {
-                    ch = cpp->currentInput->getch(cpp->currentInput, yylvalpp);
-                    if (ch == '\n' || ch == EOF) {
-                        break;
-                    }
+                    CPPErrorToInfoLog("The line continuation character (\\) is not part of the OpenGL ES Shading Language");
+                    return -1;
                 }
                 if (len < MAX_STRING_LEN) {
                     string_val[len] = ch;