X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=Makefile;h=d2010fe48669e549cc4c0865362c3f5103a349ca;hp=4ca74a3ff25a223140d6022fa1d5769393f53bd0;hb=HEAD;hpb=3e4a9d60a9419621b08c647a306843d76c47c2cb

diff --git a/Makefile b/Makefile
index 4ca74a3f..d2010fe4 100644
--- a/Makefile
+++ b/Makefile
@@ -2,13 +2,6 @@
 # given explicitly on the command line) so mention it first.
 all:
 
-# List all subdirectories here. Each contains its own Makefile.local
-subdirs = compat completion emacs lib test
-
-# We make all targets depend on the Makefiles themselves.
-global_deps = Makefile Makefile.config Makefile.local \
-	$(subdirs:%=%/Makefile) $(subdirs:%=%/Makefile.local)
-
 # Sub-directory Makefile.local fragments can append to these variables
 # to have directory-specific cflags as necessary.
 
@@ -16,19 +9,63 @@ extra_cflags :=
 extra_cxxflags :=
 
 # Get settings from the output of configure by running it to generate
-# Makefile.config if it doesn't exist yet. And add Makefile.config to
-# our global dependency list.
+# Makefile.config if it doesn't exist yet.
+
+# If Makefile.config doesn't exist, then srcdir won't be
+# set. Conditionally set it (assuming a plain srcdir build) so that
+# the rule to generate Makefile.config can actually work.
+srcdir ?= .
+
 include Makefile.config
+
+# We make all targets depend on the Makefiles themselves.
+global_deps = Makefile Makefile.config Makefile.local \
+	$(subdirs:%=%/Makefile) $(subdirs:%=%/Makefile.local)
+
+INCLUDE_MORE := yes
+ifneq ($(filter clean distclean dataclean, $(word 1, $(MAKECMDGOALS))),)
+CLEAN_GOAL := $(word 1, $(MAKECMDGOALS))
+
+# If there are more goals following CLEAN_GOAL, run $(MAKE)s in parts.
+ifneq ($(word 2, $(MAKECMDGOALS)),)
+INCLUDE_MORE := no
+FOLLOWING_GOALS := $(wordlist 2, 99, $(MAKECMDGOALS))
+
+.PHONY: $(FOLLOWING_GOALS) make_in_parts
+$(FOLLOWING_GOALS):
+	@true
+$(CLEAN_GOAL): make_in_parts
+make_in_parts:
+	$(MAKE) $(CLEAN_GOAL)
+	$(MAKE) $(FOLLOWING_GOALS) configure_options="$(configure_options)"
+endif
+
+else
+CLEAN_GOAL :=
+endif
+
+# Potentially speedup make clean, distclean and dataclean ; avoid
+# re-creating Makefile.config if it exists but configure is newer.
+ifneq ($(CLEAN_GOAL),)
+Makefile.config: | $(srcdir)/configure
+else
 Makefile.config: $(srcdir)/configure
+endif
+ifeq ($(configure_options),)
 	@echo ""
 	@echo "Note: Calling ./configure with no command-line arguments. This is often fine,"
 	@echo "      but if you want to specify any arguments (such as an alternate prefix"
 	@echo "      into which to install), call ./configure explicitly and then make again."
 	@echo "      See \"./configure --help\" for more details."
 	@echo ""
-	./configure
+endif
+	$(srcdir)/configure $(configure_options)
 
+ifeq ($(INCLUDE_MORE),yes)
+# runtime variable definitions available in all subdirs
+include $(srcdir)/Makefile.global
 # Finally, include all of the Makefile.local fragments where all the
 # real work is done.
 
 include $(subdirs:%=%/Makefile.local) Makefile.local
+endif