Allow a new syntax in a module requires-declaration:

  requires ! feature

The purpose of this is to allow (for instance) the module map for /usr/include
to exclude <tgmath.h> and <complex.h> when building in C++ (these headers are
instead provided by the C++ standard library in this case, and the glibc C
<tgmath.h> header would otherwise try to include <complex.h>, resulting in a
module cycle).

llvm-svn: 193549

1 files changed, 1 insertions, 0 deletions

diff --git a/clang/test/Modules/Inputs/DependsOnModule.framework/Headers/not_cxx.h b/clang/test/Modules/Inputs/DependsOnModule.framework/Headers/not_cxx.h
new file mode 100644
index 00000000000..c29a9219c64
--- /dev/null
+++ b/clang/test/Modules/Inputs/DependsOnModule.framework/Headers/not_cxx.h
@@ -0,0 +1 @@
+extern int template;