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This is a collection of autoconf macros which've been written by
various people at CMU. To use it, use "aclocal -I cmulocal" (after
the first time, automake should automatically use the -I cmulocal, if
you've called CMU_INIT_AUTOMAKE in configure.ac).
CMU_INIT_AUTOMAKE
If you use automake, you should call this after AM_INIT_AUTOMAKE.
It adds "-I cmulocal" to the aclocal command line, so that when
automake runs aclocal, aclocal'll continue to pick up these macros.
CMU_ADD_LIBPATH
Add -L(arg), and possibly -R(arg) (or whatever the runpath is) to
LDFLAGS.
CMU_ADD_LIBPATH_TO
Likewise to above, except adds it to the specified variable (arg 2).
CMU_GUESS_RUNPATH_SWITCH
Attempts to guess what the runpath switch is (-R or whatever).
CMU_COMERR
Requires that com_err exist in the collection (at CMU, do this by
running "cvs checkout com_err", and adding com_err to DIST_SUBDIRS
in your Makefile.am).
It sets the output variable COMPILE_ET to the compile_et program to
use, and adds the appropriate paths to LDFLAGS and CPPFLAGS.
It does *not* add -lcom_err to LIBS (this would cause later library
checks to fail if com_err needs to be built), so Makefiles need to
explicitly add -lcom_err (which, after all, should always exist as
long as the com_err compile doesn't blow up). Makefiles should do
this by using LIB_COMERR, which will substitute to the appropriate
magic to use to grab the library. (This may involve a libtool archive;
you should be using libtool to link your program if you distribute
libraries with it that the program may link against).
Note that com_err will only be compiled if the configure script
can't find compile_et or libcom_err; if the system already has them,
the configure script will use the system installation (although, due
to some autoconf wonkiness, com_err will still be configured; it just
won't show up in the @subdirs@ expansion).
CMU_NANA
Adds --with-nana, set by default; if set, attempts to link against
libnana. If not set, or if libnana is unavailable, or if we're not
using gcc, it defines WITHOUT_NANA.
CMU_PROG_LIBTOOL
Just like AM_PROG_LIBTOOL, except it performs a couple little hacks
to make sure that things don't break on picky vendor compilers
which whine about empty translation units. [DEPRECATED - DO NOT USE]
CMU_PTHREADS
This attempts to link against libpthread (failing if it can't be found),
and attempts to do any system-specific setup required for thread
support (for example, most things want _REENTRANT to be defined,
but Solaris wants _POSIX_PTHREAD_SEMANTICS and __EXTENSIONS__, IRIX
wants to see _SGI_REENTRANT_FUNCTIONS, etc).
CMU_SASL
This tries to find a SASL library, and calls AC_SUBST on LIB_SASL
if it finds one, or tells the user to go ftp it if it doesn't exist.
Provides --with-sasldir.
CMU_KRB4
This attempts to find Kerberos 4 libraries and set up CFLAGS and LIBS
appropriately. It also updates and substitutes RPATH for shared library
stuff.

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