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-rw-r--r--config/makefiles/nonrecursive.mk68
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diff --git a/config/makefiles/nonrecursive.mk b/config/makefiles/nonrecursive.mk
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+# -*- makefile -*-
+# vim:set ts=8 sw=8 sts=8 noet:
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# The purpose of this file is to pull in non-recursive targets when performing
+# a partial tree (not top-level) build. This will allow people to continue to
+# build individual directories while some of the targets may not be normally
+# defined in that make file.
+#
+# Non-recursive targets are attached to existing make targets. The
+# NONRECURSIVE_TARGETS variable lists the make targets that modified. For
+# each target in this list, the NONRECURSIVE_TARGET_<target> variable will
+# contain a list of partial variable names. We will then look in variables
+# named NONRECURSIVE_TARGETS_<target>_<fragment>_* for information describing
+# how to evaluate non-recursive make targets.
+#
+# Targets are defined by the following variables:
+#
+# FILE - The make file to evaluate. This is equivalent to
+# |make -f <FILE>|
+# DIRECTORY - The directory whose Makefile to evaluate. This is
+# equivalent to |make -C <DIRECTORY>|.
+# TARGETS - Targets to evaluate in that make file.
+#
+# Only 1 of FILE or DIRECTORY may be defined.
+#
+# For example:
+#
+# NONRECURSIVE_TARGETS = export libs
+# NONRECURSIVE_TARGETS_export = headers
+# NONRECURSIVE_TARGETS_export_headers_FILE = /path/to/exports.mk
+# NONRECURSIVE_TARGETS_export_headers_TARGETS = $(DIST)/include/foo.h $(DIST)/include/bar.h
+# NONRECURSIVE_TARGETS_libs = cppsrcs
+# NONRECURSIVE_TARGETS_libs_cppsrcs_DIRECTORY = $(DEPTH)/foo
+# NONRECURSIVE_TARGETS_libs_cppsrcs_TARGETS = /path/to/foo.o /path/to/bar.o
+#
+# Will get turned into the following:
+#
+# exports::
+# $(MAKE) -C $(DEPTH) -f /path/to/exports.mk $(DIST)/include/foo.h $(DIST)/include/bar.h
+#
+# libs::
+# $(MAKE) -C $(DEPTH)/foo /path/to/foo.o /path/to/bar.o
+
+ifndef INCLUDED_NONRECURSIVE_MK
+
+define define_nonrecursive_target
+$(1)::
+ $$(MAKE) -C $(or $(4),$$(DEPTH)) $(addprefix -f ,$(3)) $(2)
+endef
+
+$(foreach target,$(NONRECURSIVE_TARGETS), \
+ $(foreach entry,$(NONRECURSIVE_TARGETS_$(target)), \
+ $(eval $(call define_nonrecursive_target, \
+ $(target), \
+ $(NONRECURSIVE_TARGETS_$(target)_$(entry)_TARGETS), \
+ $(NONRECURSIVE_TARGETS_$(target)_$(entry)_FILE), \
+ $(NONRECURSIVE_TARGETS_$(target)_$(entry)_DIRECTORY), \
+ )) \
+ ) \
+)
+
+INCLUDED_NONRECURSIVE_MK := 1
+endif
+