Add a new warning -Wmissing-variable-declarations, to warn about variables
defined without a previous declaration. This is similar to
-Wmissing-prototypes, but for variables instead of functions.
Patch by Ed Schouten.
llvm-svn: 166498
diff --git a/clang/test/Sema/warn-missing-variable-declarations.c b/clang/test/Sema/warn-missing-variable-declarations.c
new file mode 100644
index 0000000..cf911c2
--- /dev/null
+++ b/clang/test/Sema/warn-missing-variable-declarations.c
@@ -0,0 +1,36 @@
+// RUN: %clang -Wmissing-variable-declarations -fsyntax-only -Xclang -verify %s
+
+int vbad1; // expected-warning{{no previous extern declaration for non-static variable 'vbad1'}}
+
+int vbad2;
+int vbad2 = 10; // expected-warning{{no previous extern declaration for non-static variable 'vbad2'}}
+
+struct {
+ int mgood1;
+} vbad3; // expected-warning{{no previous extern declaration for non-static variable 'vbad3'}}
+
+int vbad4;
+int vbad4 = 10; // expected-warning{{no previous extern declaration for non-static variable 'vbad4'}}
+extern int vbad4;
+
+extern int vgood1;
+int vgood1;
+int vgood1 = 10;
+// RUN: %clang -Wmissing-variable-declarations -fsyntax-only -Xclang -verify %s
+
+int vbad1; // expected-warning{{no previous extern declaration for non-static variable 'vbad1'}}
+
+int vbad2;
+int vbad2 = 10; // expected-warning{{no previous extern declaration for non-static variable 'vbad2'}}
+
+struct {
+ int mgood1;
+} vbad3; // expected-warning{{no previous extern declaration for non-static variable 'vbad3'}}
+
+int vbad4;
+int vbad4 = 10; // expected-warning{{no previous extern declaration for non-static variable 'vbad4'}}
+extern int vbad4;
+
+extern int vgood1;
+int vgood1;
+int vgood1 = 10;