[rfc] autotools compatibility and Hurd as platform

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+From: Justus Winter <4winter@informatik.uni-hamburg.de>\r
+To: notmuch@notmuchmail.org\r
+Subject: [rfc] autotools compatibility and Hurd as platform\r
+Date: Sat,  3 Mar 2012 17:40:21 +0100\r
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+\r
+I made two tiny patches to enable notmuch to be built on the Hurd, the\r
+first one is straight forward, it just adds GNU as a platform and\r
+reuses the settings for Linux.\r
+\r
+The second one deals with the problem that the value passed as an\r
+argument to --build is not a triple but a tuple:\r
+\r
+% dpkg-architecture -qDEB_HOST_GNU_TYPE\r
+i486-gnu\r
+\r
+notmuchs configure script expects the arguments for --host and --build\r
+to be triple but autotools is much more forgiving here. It does so by\r
+canonicalizing the values using some serious voodoo in\r
+/usr/share/misc/config.sub.\r
+\r
+The patch reuses config.sub to canonicalize the arguments, but this\r
+introduces a build dependency on autotools and probably worse, it uses\r
+autotools internals and the path to config.sub has to be hardcoded.\r
+\r
+Since this might be not desirable we might also just drop the code\r
+that parses the --host and --build options since we're not using them\r
+anyway.\r
+\r
+With these two patches notmuch builds fine and works on the Hurd, the\r
+testsuite is running fine (modulo one test, but that might be broken,\r
+haven't checked on linux) and the python bindings are fine too (I've\r
+been successfully running afew to tag some mails).\r
+\r
+Cheers,\r
+Justus\r