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There are a bunch of macros (__need_size_t etc) that request just one piece of <stddef.h>; if any one of these is defined, we just directly include the underlying header. Note that <stddef.h> provides a ::nullptr_t. We don't want that available to includers of <cstddef>, so instead of following the usual pattern where <cfoo> includes <foo.h> then pulls things from :: into std:: with using-declarations, we implement <stddef.h> and <cstddef> separately; both include <__nullptr> for the definition of std::nullptr_t. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@249761 91177308-0d34-0410-b5e6-96231b3b80d8
libc++ Documentation ==================== The libc++ documentation is written using the Sphinx documentation generator. It is currently tested with Sphinx 1.1.3. To build the documents into html configure libc++ with the following cmake options: * -DLLVM_ENABLE_SPHINX=ON * -DLIBCXX_INCLUDE_DOCS=ON After configuring libc++ with these options the make rule `docs-libcxx-html` should be available.