LLVMC2: Teach llvm_gcc_c tool about -include and -fsyntax-only.

- Only focusing on llvm_gcc_c for now, eventually this needs to be
   refactored so it can be shared via all the gcc-like tools.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59582 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CompilerDriver/Tools.td

@@ -21,10 +21,16 @@ def llvm_gcc_c : Tool<
                     "llvm-gcc -E -x c++ $INFILE -o $OUTFILE",
                     (default),
                     "llvm-gcc -E -x c++ $INFILE"),
+            (switch_on "fsyntax-only"),
+              "llvm-gcc -c -x c $INFILE",
             (default),
               "llvm-gcc -c -x c $INFILE -o $OUTFILE -emit-llvm")),
  (switch_option "E", (stop_compilation),
    (help "Stop after the preprocessing stage, do not run the compiler")),
+ (switch_option "fsyntax-only", (stop_compilation),
+   (help "Stop after checking the input for syntax errors")),
+ (parameter_list_option "include", (forward),
+   (help "Include the named file prior to preprocessing")),
  (sink)
 ]>;
 

test/LLVMC/include.c

@@ -0,0 +1,9 @@
+/*
+ * Check that the 'include' options work.
+ * RUN: echo "int x;\n" > %t1.inc
+ * RUN: llvmc2 -include %t1.inc -fsyntax-only %s
+ */
+
+int f0(void) {
+  return x;
+}