modernize-deprecated-headers¶
Some headers from C library were deprecated in C++ and are no longer welcome in C++ codebases. Some have no effect in C++. For more details refer to the C++ 14 Standard [depr.c.headers] section.
This check replaces C standard library headers with their C++ alternatives and removes redundant ones.
Improtant note: the Standard doesn’t guarantee that the C++ headers declare all the same functions in the global namespace. The check in its current form can break the code that uses library symbols from the global namespace.
- <assert.h> 
- <complex.h> 
- <ctype.h> 
- <errno.h> 
- <fenv.h> // deprecated since C++11 
- <float.h> 
- <inttypes.h> 
- <limits.h> 
- <locale.h> 
- <math.h> 
- <setjmp.h> 
- <signal.h> 
- <stdarg.h> 
- <stddef.h> 
- <stdint.h> 
- <stdio.h> 
- <stdlib.h> 
- <string.h> 
- <tgmath.h> // deprecated since C++11 
- <time.h> 
- <uchar.h> // deprecated since C++11 
- <wchar.h> 
- <wctype.h> 
If the specified standard is older than C++11 the check will only replace headers deprecated before C++11, otherwise – every header that appeared in the previous list.
These headers don’t have effect in C++:
- <iso646.h> 
- <stdalign.h> 
- <stdbool.h>