Kefu Chai 80c4a1cd37 common: disable journald logging backend if struct msghdr is not found ... * cmake/modules/CephChecks.cmake: detect the existence of struct msghdr, define HAVE_MSGHDR if it is found * src/common/CMakeLists.txt: do not compile journald.cc if HAVE_MSGHDR is FALSE. as in that case, we cannot use sendmsg() to write to journald unix domain socket * src/test/CMakeLists.txt, src/test/common/CMakeLists.txt: disable test exercising journald logging backend if HAVE_MSGHDR is not defined * src/common/Journald.h: define a dummy JournaldLogger and a dummy JournaldClusterLogger when HAVE_MSGHDR is not defined, in order to minimize the change in Log.h and Log.cc, otherwise the source code of Log.h and Log.cc would be segmented into smaller chunks by `ifdef HAVE_MSGHDR` macros. * src/include/config-h.in.cmake: define a new macro named HAVE_MSGHDR. Signed-off-by: Kefu Chai <kchai@redhat.com>		2021-04-06 14:46:33 +08:00
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modules	common: disable journald logging backend if struct msghdr is not found	2021-04-06 14:46:33 +08:00