"The RT System itself via RT" <rt-comment@krbdev.mit.edu> writes:

> bash% tail -100 < ,make-check | head -22      
> making check in lib/krb5/ccache...
> cc   -I../../../include -I./../../../include -I./ccapi   -DKRB5_DEPRECATED=1 -DKRB5_PRIVATE=1   -xarch=v9 -D_REENTRANT -c t_cc.c
> "t_cc.c", line 140: warning: implicit function declaration: strdup
> "t_cc.c", line 140: warning: improper pointer/integer combination: op "="

Does adding an inclusion of <string.h> to the beginning of that file help?