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073e157533
Trying to enable automake's subdir-objects option resulted in the creation of literal directories such as src/$(srcdir)/remote/. I traced this to the fact that we had used a literal $(srcdir) in a location that later fed an automake *_SOURCES variable. This has also been reported as an automake bug: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13928 but it's better to fix our code than to wait for an automake fix. Some things to remember that affect VPATH builds, and where an in-tree build is blissfully unaware of the issues: if a VPATH build fails to find a file that was used as a prereq of any other target, then the rule for that file will expand $@ to prefer the current build dir (bad because a VPATH build on a fresh checkout will then stick $@ in the current directory instead of the desired srcdir); conversely, if a VPATH build finds the file in srcdir but decides it needs to be rebuilt, then the rule for that file will expand $@ to include the directory where it was found out-of-date (bad for an explicit listing of $(srcdir)/$@ because an incremental VPATH build will then expand srcdir twice). As we want these files to go into srcdir unconditionally, we have to massage or avoid $@ for any recipe that involves one of these files. Therefore, this patch removes all uses of $(srcdir) from any generated file name that later feeds a *_SOURCES variable, and then rewrites all the recipes to generate those files to hard-code their creation into srcdir without the use of $@. * src/Makefile.am (REMOTE_DRIVER_GENERATED): Drop $(srcdir); VPATH builds know how to find the files, and automake subdir-objects fails with it in place. (LXC_MONITOR_PROTOCOL_GENERATED, (LXC_MONITOR_GENERATED) (ACCESS_DRIVER_GENERATED, LOCK_PROTOCOL_GENERATED): Likewise. (*_client_bodies.h): Hard-code rules to write into srcdir, as VPATH tries to build $@ locally if missing. (util/virkeymaps.h): Likewise. (lxc/lxc_monitor_dispatch.h): Likewise. (access/viraccessapi*): Likewise. (locking/lock_daemon_dispatch_stubs.h): Likewise. * daemon/Makeflie.am (DAEMON_GENERATED, remote_dispatch.h): Likewise. Signed-off-by: Eric Blake <eblake@redhat.com> fixup DAEMON_GENERATED