Error messages

[Gabriel de Perthuis]

When libtool encouters an error about a missing library (for example, if 
a .la refers to a file which is not found), it would be good to give 
more explicit errors.
In my case,  it was a problem of nested dependencies; the error was not 
due to $lib (the dependency of the dependency)  but too $name (the 
dependency) which had been compiled when $lib was in another directory; 
so the solution was to rebuild $name not $lib.
Here is a patch giving a message with $name and $laname:
--- /usr/bin/libtool    2004-02-11 10:35:02.000000000 +0100
+++ libtool     2004-07-14 17:18:53.992827152 +0200
@@ -1838,6 +1838,7 @@
       if test "$found" = yes || test -f "$lib"; then :
       else
         $echo "$modename: cannot find the library \`$lib'" 1>&2
+         $echo "It was referenced from library \`$name' 's libtool 
archive, \`$laname'" 1>&2
         exit 1
       fi