* Makefile.in (LDFLAGS): Remove, duplicates config/pre.in.

* Makefile.in (LDFLAGS):  Remove, duplicates config/pre.in.
(CFLAGS):  Add -I options for file and stdio, to avoid paths in
#include statements.
(all-mac, clean-mac):  Add.
* ccdefops.c:  Avoid includes with pathnames, since they don't work
on the Mac.  Configure the default cache based on whether the
system has <sys/types.h> (which defines types for low-level file
operations, among other things).
* configure.in (CONFIG_DIRS):  Build stdio before file, for Mac
convenience (where file doesn't build).

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@5157 dc483132-0cff-0310-8789-dd5450dbe970