| // Test that a [no_undeclared_headers] module can include builtin headers, even |
| // if these have been "claimed" by a different module that wraps these builtin |
| // headers. libc++ does this, for example. |
| // |
| // The test inputs used here replicates the relationship between libc++ and |
| // glibc. When modularizing glibc, [no_undeclared_headers] must be used to |
| // prevent glibc from including the libc++ versions of the C standard library |
| // headers. |
| |
| // RUN: rm -rf %t |
| // RUN: %clang_cc1 -fmodules-cache-path=%t -fmodules -fbuiltin-headers-in-system-modules -fimplicit-module-maps -I %S/Inputs/no-undeclared-includes-builtins/libcxx -I %S/Inputs/no-undeclared-includes-builtins/glibc %s |
| // expected-no-diagnostics |
| |
| #include <stddef.h> |
