Frontend: Add basic -H support.

 - I didn't implement the GCC "multiple include guard" detection parts, because
   it doesn't seem useful or obvious.

llvm-svn: 111983

5 files changed, 12 insertions, 0 deletions

diff --git a/clang/test/Frontend/Inputs/lit.local.cfg b/clang/test/Frontend/Inputs/lit.local.cfg
new file mode 100644
index 00000000000..e6f55eef7af
--- /dev/null
+++ b/clang/test/Frontend/Inputs/lit.local.cfg
@@ -0,0 +1 @@
+config.suffixes = []
diff --git a/clang/test/Frontend/Inputs/test.h b/clang/test/Frontend/Inputs/test.h
new file mode 100644
index 00000000000..98cc459a242
--- /dev/null
+++ b/clang/test/Frontend/Inputs/test.h
@@ -0,0 +1 @@
+#include "test2.h"
diff --git a/clang/test/Frontend/Inputs/test2.h b/clang/test/Frontend/Inputs/test2.h
new file mode 100644
index 00000000000..6d1a0d47b7f
--- /dev/null
+++ b/clang/test/Frontend/Inputs/test2.h
@@ -0,0 +1 @@
+int x;
diff --git a/clang/test/Frontend/Inputs/test3.h b/clang/test/Frontend/Inputs/test3.h
new file mode 100644
index 00000000000..92ff4b8fac0
--- /dev/null
+++ b/clang/test/Frontend/Inputs/test3.h
@@ -0,0 +1 @@
+int y;
diff --git a/clang/test/Frontend/print-header-includes.c b/clang/test/Frontend/print-header-includes.c
new file mode 100644
index 00000000000..7773d2069d9
--- /dev/null
+++ b/clang/test/Frontend/print-header-includes.c
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -include Inputs/test3.h -E -H -o %t.out %s 2> %t.err
+// RUN: FileCheck < %t.err %s
+
+// CHECK-NOT: test3.h
+// CHECK: . {{.*test.h}}
+// CHECK: .. {{.*test2.h}}
+
+#include "Inputs/test.h"