@itemize

@item
On AIX there are two different styles of shared linking, one in which symbols
are bound at link-time and one in which symbols are bound at runtime only,
similar to ELF@.  In case of doubt use @code{LDFLAGS=-Wl,-brtl} for the latter style.

@item
For C++ code with templates, it may be necessary to specify the way the compiler
will generate the instantiations.  For Portland pgCC version5, use
@code{CXX='pgCC --one_instantiation_per_object'} and avoid parallel @command{make}.

@item
FreeBSD @command{make} does not conform to @sc{posix} in its handling
of file modification times, which causes it to loop while building libtool.
Consider using a different @command{such} as GNU make instead.

@item
The default shell on UNICOS 9, a ksh 88e variant, is too buggy to
correctly execute the libtool script.  Users are advised to install a
modern shell such as GNU bash.

@item
Some HP-UX @command{sed} programs are horribly broken, and cannot handle
libtool's requirements, so users may report unusual problems.  There
is no workaround except to install a working @command{sed} (such as GNU sed)
on these systems.

@item
The vendor-distributed NCR MP-RAS @command{cc} programs emits copyright
on standard error that confuse tests on size of @file{conftest.err}.  The
workaround is to specify @env{CC} when run configure with
@code{CC='cc -Hnocopyr'}.

@item
Any earlier DG/UX system with ELF executables, such as R3.10 or
R4.10, is also likely to work, but hasn't been explicitly tested.

@item
On Reliant Unix libtool has only been tested with the Siemens C-compiler
and an old version of @command{gcc} provided by Marco Walther.

@item
@file{libtool.m4}, @file{ltdl.m4} and the @file{configure.ac} files are marked
to use autoconf-mode, which is distributed with GNU Emacs 21, Autoconf itself,
and all recent releases of XEmacs.

@end itemize