Textual headers and builtins that are #import'd from different
modules should get re-entered when these modules are independent
from each other.
Differential Revision: https://reviews.llvm.org/D26267
rdar://problem/25881934
llvm-svn: 291644
This used to work before r284797 + r285152, which exposed something
interesting; some users include builtins from umbrella headers.
Clang should emit a warning to warn users this is not a good practice
and umbrella headers shouldn't get the
implicitly-add-the-builtin-version behavior for builtin header names.
While we're not there, add the testcase to represent the way it
currently works.
llvm-svn: 285377
headers. We previously got this check backwards and treated the wrapper header
as being textual.
This is important because our wrapper headers sometimes inject macros into the
system headers that they #include_next, and sometimes replace them entirely.
llvm-svn: 285152
The 'no_undeclared_includes' attribute should be used in a module to
tell that only non-modular headers and headers from used modules are
accepted.
The main motivation behind this is to prevent dep cycles between system
libraries (such as darwin) and libc++.
Patch by Richard Smith!
llvm-svn: 284797
Bruno Cardoso Lopes