Re: [libvirt] [PATCHv2 1/2] build: avoid journald on rhel 5

Commit f6430390 broke builds on RHEL 5, where glibc (2.5) is too old to support mkostemp (2.7) or htole64 (2.9). While gnulib has mkostemp, it still lacks htole64; and it's not worth dragging in replacements on systems where journald is unlikely to exist in the first place, so we just use an extra configure-time check as our witness of whether to attempt compiling the code. * src/util/logging.c (virLogParseOutputs): Don't attempt to compile journald on older glibc. * configure.ac (AC_CHECK_DECLS): Check for htole64. --- v2: use correct configure probe. Now tested on both F17 and RHEL 5, so finally pushing under the build-breaker rule.