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AC_DEFUN(AM_WITH_MODULES,
[AC_MSG_CHECKING(if support for dynamic modules is wanted)
AC_ARG_WITH(modules,
[ --with-modules add support for dynamic modules],
[use_modules=$withval], [use_modules=no])
AC_MSG_RESULT($use_modules)
if test "$use_modules" = yes; then
LIBS="$LIBS -ldl"
AC_CHECK_HEADER([dlfcn.h],
[AC_CACHE_CHECK([for dlopen in libdl], ac_cv_func_dlopen_libdl,
[AC_TRY_LINK([#include <dlfcn.h>],
[(void)dlopen(0, RTLD_NOW)],
ac_cv_func_dlopen_libdl=yes,
ac_cv_func_dlopen_libdl=no)])],
ac_cv_func_dlopen_libdl=no)
if test "$ac_cv_func_dlopen_libdl$ac_cv_header_dlfcn_h" = yesyes; then
AC_DEFINE(WITH_MODULES)
LDFLAGS="$LDFLAGS -rdynamic"
else
LIBS=`echo $LIBS | sed -e 's/-ldl//'`
AC_MSG_WARN([-ldl library not found or does not appear to work])
use_modules=no
fi
fi
])
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