<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/3.26.0"> </HEAD> <BODY> I have to make some assumptions here: - the xcb/util repository is moving into five new repositories - opportunities for reuse are being investigated <BLOCKQUOTE TYPE=CITE> <TT>> [0] <A HREF="http://cgit.freedesktop.org/~arnau/xorg-util-macros/commit/?id=28c561b3dd5729ffa511cfb3727dfff36477d80a">http://cgit.freedesktop.org/~arnau/xorg-util-macros/commit/?id=28c561b3dd5729ffa511cfb3727dfff36477d80a</A></TT> </BLOCKQUOTE> I see a couple of reusable chunks, mainly the version compare and setting related xcb path. The rest is miscellaneous and kills reusability. I would factor out these two chunks in separate macros. Just like C code, it's more reusable if it does only one thing and has no side-effects. It remains to be seen if either of those are reusable by non-xcb packages (libX11?). I cannot answer that. There is a dependency on AX_* macros. You cannot rely on this macro being present on all platforms, being at the correct version or not being hacked. Xorg is a similar position with respect to AX_* macros. The only safe way is for any package using it to have it's own copy. This means there cannot be a copy in util-macros, for example. If you decide to have one of the 5 new repo to contain common code (macros, C code or whatever), or a separate repo, keep in mind the backward compatibility challenge. There will be a mix bag of versions in the field. <BLOCKQUOTE TYPE=CITE> <TT>> [1] <A HREF="http://cgit.freedesktop.org/~arnau/xorg-util-macros/commit/?id=309b691da4d7a3c7e72f1b8a71c1fc18a7039cea">http://cgit.freedesktop.org/~arnau/xorg-util-macros/commit/?id=309b691da4d7a3c7e72f1b8a71c1fc18a7039cea</A></TT> </BLOCKQUOTE> This one is reusable. Xorg packages do not check for the presence of m4. This is the message I get if it missing: <BLOCKQUOTE> <PRE> autoreconf: running: aclocal -I /home/nadon/xorg/src/share/aclocal autom4te: need GNU m4 1.4 or later: /usr/bin/m4 </PRE> </BLOCKQUOTE> I am not sure autoconf will even get as far as to run your test. Perhaps it is not needed. That's all I can think of for now, not being familiar with xcb. </BODY> </HTML>