Integrating libtool head into GraphicsMagick

[Bob Friesenhahn]

Ralph provided me with some patches to get development libtool 
integrated into development GraphicsMagick using a non-recursive 
build, but I have run into a hang-up.  The problem is that libtool 
tests include code like:

AC_CHECK_FUNCS([closedir opendir readdir], [], [AC_LIBOBJ([lt__dirent])])
AC_CHECK_FUNCS([strlcat strlcpy], [], [AC_LIBOBJ([lt__strl])])
AC_CHECK_FUNCS([argz_append argz_create_sep argz_insert argz_next \
        argz_stringify], [], [ARGZ_H=argz.h; AC_LIBOBJ([argz])])

This definition is in configure.ac (but seems to be ignored):

# Directory where AC_LIBOBJ replacement files are to be found.
AC_CONFIG_LIBOBJ_DIR([ltdl])

and the files are indeed directly under 'ltdl', but automake (1.9.6) 
fails with:

% automake
configure.ac:2736: required file `./lt__dirent.c' not found
configure.ac:2736: required file `./argz.c' not found
configure.ac:2736: required file `./lt__strl.c' not found

as if it is assuming the current directory rather than looking in 
'ltdl'.

Looking at libltdl's Makefile.in I see that these files are normally 
listed in DIST_COMMON but are also in the current directory.  For the 
case of the non-recursive build, the files live in a subdirectory.

Does anyone have an idea as to how Automake can be encouraged to look 
in the right place?

Bob
======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/