$(OS) is CYGWIN but the /target/ OS is HP NonStop.&nbsp; <br>  <br>  A .so library suffix is generated by my cross-toolset for shared  libs.&nbsp; FWIW it registers .so as its suffix for SHARED_LIB.&nbsp;  The original problem was provoked by a prebuilt shared library that had  no suffix at all. <br>  <br>  Am I stuck with using &lt;search&gt; instead of &lt;file&gt; ?&nbsp; <br>  <br>  If I were to constrain all my "imported" / prebuilt libraries to have  the .so suffix, would there be a way to trick bb2 into accepting such  &lt;file&gt;s in a cross-development scenario like this?<br>  <br>  I'm foggy on why bb2 doesn't just tag such library &lt;file&gt;s as &lt;prebuilt&gt; and be happy if the file exists.<br>  <br>  Thanks,<br>  Mark<br><br><b><i>Vladimir Prus &lt;ghost@cs.msu.su&gt;</i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><file><file><br> Can you check what's the output of:<br><br>   $ bjam
 -f-<br>   ECHO $(OS) ;<br><br>is?<br></file></file></blockquote><br>