Annex C (informative) Compatibility [diff]

C.7 C standard library [diff.library]

C.7.2 Modifications to headers [diff.mods.to.headers]

For compatibility with the C standard library, the C++ standard library provides the C headers enumerated in [depr.c.headers], but their use is deprecated in C++.
There are no C++ headers for the C standard library's headers <stdnoreturn.h> and <threads.h>, nor are these headers from the C standard library headers themselves part of C++.
The C headers <complex.h> and <tgmath.h> do not contain any of the content from the C standard library and instead merely include other headers from the C++ standard library.