Support for the ARM 64 bit CPU architecture (aarch64) was introduced in autoconf 2.69. libxslt appears to use an earlier version of autoconf, preventing its being built. This can be fixed in of three ways (In order of preference): 1. Work with upstream to migrate the package to autoconf 2.69. 2. Rerun autoconf or autoreconf in %prep or %build prior to running configure. 3. Apply the patch at http://ausil.fedorapeople.org/aarch64/libxslt/libxslt-aarch64.patch which updates config.guess and config.sub to recognize aarch64.
I am upstream :-), and right now I am on autoconf-2.68-4.fc17 I am upgrading to autoconf-2.69-10 which should solve the problem on next releases. it is still inconvenient that autoreconf -if -Wall won't update automatically the config.sub and config.guess when one bumps the autoconf used. Once removed and rerun I get timestamp='2012-02-10' in config.sub and congig.guess thinkpad:~/XSLT -> grep aarch64 config.guess aarch64:Linux:*:*) aarch64_be:Linux:*:*) UNAME_MACHINE=aarch64_be thinkpad:~/XSLT -> the config files are not in git so there is no upstream commit to show, but that should be fixed in the next upstream release, thanks ! Daniel