Compiling lex.yy.c
lex.yy.c:4142:12: warning: redundant redeclaration of âisattyâ
[-Wredundant-decls]
extern int isatty (int );
^
In file included from cfg.lex:67:0:
/usr/include/unistd.h:779:12: note: previous declaration of âisattyâ was here
extern int isatty (int __fd) __THROW;
^