Re: [libvirt] [PATCH] build: prohibit cross-inclusion

Make it easier to detect invalid cross-directory includes, by adding a syntax check. The check is designed to be extensible: the default case lists only the non-driver directories, and specific directories can list a different set (for example, util/ can only use itself, network/ can only use itself, util/, or conf/). * .gnulib: Update to latest, for syntax check improvment. * cfg.mk (sc_prohibit_cross_inclusion): New check. (sc_prohibit_strncmp, sc_libvirt_unmarked_diagnostics): Simplify. ---

+# Our code is divided into modular subdirectories for a reason, and +# lower-level code must not include higher-level headers. +cross_dirs=$(patsubst $(srcdir)/src/%.,%,$(wildcard $(srcdir)/src/*/.)) +cross_dirs_re=($(subst / ,/|,$(cross_dirs))) +sc_prohibit_cross_inclusion: + @for dir in $(cross_dirs); do \ + case $$dir in \ + util/) safe="util";; \ + cpu/ | locking/ | network/ | rpc/ | security/) \ + safe="($$dir|util|conf)";; \ + xenapi/ | xenxs/ ) safe="($$dir|util|conf|xen)";; \ + *) safe="($$dir|util|conf|cpu|network|locking|rpc|security)";; \ + esac; \ + in_vc_files="^src/$$dir" \ + prohibit='^# *include .$(cross_dirs_re)' \ + exclude="# *include .$$safe" \ + halt='unsafe cross-directory include' \