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.
Important 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>