From: Chad Rosier <mcrosier@apple.com>
Date: Sat, 7 Apr 2012 00:01:31 +0000 (+0000)
Subject: [driver] In general, the driver claims redundant args and uses the last arg.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a53ab5c569f494e44344ab950ccd6289dfa2d3ef;p=clang

[driver] In general, the driver claims redundant args and uses the last arg.
However, the '-x' option has special handling and wasn't following this
paradigm.  Fix it to do so by claiming the arg as we parse the '-x' option.
rdar://11203340


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154231 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 35e63989a3..7ab3278c7f 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -1003,6 +1003,7 @@ void Driver::BuildInputs(const ToolChain &TC, const DerivedArgList &Args,
     } else if (A->getOption().matches(options::OPT_x)) {
       InputTypeArg = A;
       InputType = types::lookupTypeForTypeSpecifier(A->getValue(Args));
+      A->claim();
 
       // Follow gcc behavior and treat as linker input for invalid -x
       // options. Its not clear why we shouldn't just revert to unknown; but
diff --git a/test/Driver/redundant-args.c b/test/Driver/redundant-args.c
new file mode 100644
index 0000000000..7bf98e1e73
--- /dev/null
+++ b/test/Driver/redundant-args.c
@@ -0,0 +1,2 @@
+// RUN: %clang -target x86_64-apple-darwin10 \
+// RUN:   -Werror -x c -x c -fsyntax-only %s