found 158969 2.69-10 thanks Hi *, I have to reopen this because the documentation is plain wrong and misleading still: -- Macro: AC_SYS_LARGEFILE Arrange for 64-bit file offsets, known as large-file support (http://www.unix-systems.org/version2/whatsnew/lfs20mar.html). On some hosts, one must use special compiler options to build programs that can access large files. Append any such options to the output variable 'CC'. Define '_FILE_OFFSET_BITS' and '_LARGE_FILES' if necessary. ii autoconf 2.69-10 all automatic configure script builder ii autoconf-doc 2.69-10 all automatic configure script builder documentatio Looking at the source, AC_SYS_LARGEFILE calls AC_DEFINE_UNQUOTED, which appends to DEFS (which I agree with Tom Dickey is wrong) as Florian Weimer said, but — even more confusingly — only when AC_CONFIG_HEADERS is not used. If AC_CONFIG_HEADERS is used, the definition is only written to its output file (config.h by default). This is even more unfortunate, because now, if any program includes a glibc system header before "config.h", the definition will be ignored, because it comes too late. CPPFLAGS is r̲e̲a̲l̲l̲y̲ the correct place for this. Again. But that’s a different bug. This issue is about the documentation being wrong — please fix the documentation and raise this bug upstream (and this time, don’t let them tell you it’s not a bug because it most curtainly is). Thanks, //mirabilos (current hat: Debian Developer) -- tarent solutions GmbH Rochusstraße 2-4, D-53123 Bonn • http://www.tarent.de/ Tel: +49 228 54881-393 • Fax: +49 228 54881-235 HRB 5168 (AG Bonn) • USt-ID (VAT): DE122264941 Geschäftsführer: Dr. Stefan Barth, Kai Ebenrett, Boris Esser, Alexander Steeg _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf