tested with version 1.2.2

trying to build a simple program with only the library header file or with the header file at the top fails with the following error message

[ink@mtz ~]$ gcc tt.c
In file included from tt.c:2:0:
/usr/include/pwquality.h:137:31: error: unknown type name ‘size_t’
[ink@mtz ~]$

possible solution is to include stddef header file[1]

[1] http://pubs.opengroup.org/onlinepubs/7908799/xsh/stddef.h.html