Add specific warning flags for GNU ext in lexer.

This patch adds the following flags covering existing warnings:

-Wgnu-zero-variadic-macro-arguments
-Wgnu-imaginary-constant
-Wgnu-binary-literal
-Wgnu-zero-line-directive

Patch by Peter Lewis.

llvm-svn: 190017

1 files changed, 56 insertions, 0 deletions

diff --git a/clang/test/Lexer/gnu-flags.c b/clang/test/Lexer/gnu-flags.c
new file mode 100644
index 00000000000..6e47547b009
--- /dev/null
+++ b/clang/test/Lexer/gnu-flags.c
@@ -0,0 +1,56 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s -DNONE
+// RUN: %clang_cc1 -fsyntax-only -verify %s -DALL -Wgnu 
+// RUN: %clang_cc1 -fsyntax-only -verify %s -DALL \
+// RUN:   -Wgnu-zero-variadic-macro-arguments \
+// RUN:   -Wgnu-imaginary-constant -Wgnu-binary-literal -Wgnu-zero-line-directive
+// RUN: %clang_cc1 -fsyntax-only -verify %s -DNONE -Wgnu \
+// RUN:   -Wno-gnu-zero-variadic-macro-arguments \
+// RUN:   -Wno-gnu-imaginary-constant -Wno-gnu-binary-literal -Wno-gnu-zero-line-directive
+// Additional disabled tests:
+// %clang_cc1 -fsyntax-only -verify %s -DZEROARGS -Wgnu-zero-variadic-macro-arguments
+// %clang_cc1 -fsyntax-only -verify %s -DIMAGINARYCONST -Wgnu-imaginary-constant
+// %clang_cc1 -fsyntax-only -verify %s -DBINARYLITERAL -Wgnu-binary-literal
+// %clang_cc1 -fsyntax-only -verify %s -DLINE0 -Wgnu-zero-line-directive
+
+#if NONE
+// expected-no-diagnostics
+#endif
+
+
+#if ALL || ZEROARGS
+// expected-warning@+9 {{must specify at least one argument for '...' parameter of variadic macro}}
+// expected-note@+4 {{macro 'efoo' defined here}}
+// expected-warning@+3 {{token pasting of ',' and __VA_ARGS__ is a GNU extension}}
+#endif
+
+#define efoo(format, args...) foo(format , ##args)
+
+void foo( const char* c )
+{
+  efoo("6");
+}
+
+
+#if ALL || IMAGINARYCONST
+// expected-warning@+3 {{imaginary constants are a GNU extension}}
+#endif
+
+float _Complex c = 1.if;
+
+
+#if ALL || BINARYLITERAL
+// expected-warning@+3 {{binary integer literals are a GNU extension}}
+#endif
+
+int b = 0b0101;
+
+
+// This case is handled differently because lit has a bug whereby #line 0 is reported to be on line 4294967295
+// http://llvm.org/bugs/show_bug.cgi?id=16952
+#if ALL || LINE0
+#line 0 // expected-warning {{#line directive with zero argument is a GNU extension}}
+#else
+#line 0
+#endif
+
+// WARNING: Do not add more tests after the #line 0 line!  Add them before the LINE0 test