# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# This file contains definitions that are specific to the invocation
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# and usage of Gnu Make.
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ifndef VERBOSE
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# Be silent unless 'VERBOSE' is set on the make command line.
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SILENT = --silent
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endif
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ifndef ADHD_BUILD_DIR
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export ADHD_BUILD_DIR = $(ADHD_DIR)/build/$(BOARD)
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endif
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GAVD_ARCHIVE = $(ADHD_BUILD_DIR)/lib/gavd.a
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LIBS = \
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-L$(ADHD_DIR)/cras/src/.libs \
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$(GAVD_ARCHIVE) \
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$(foreach lib,$(MY_LIBS),-l$(lib))
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# mkdir: Creates a directory, and all its parents, if it does not exist.
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#
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mkdir = [ ! -d $(1) ] && \
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$(MKDIR) --parents $(1) || true
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# remake: Gnu Make function which will create the build directory,
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# then build the first argument by recursively invoking make.
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# The recursive make is performed in the build directory.
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#
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# $(call remake,<label>,<subdirectory>,<makefile>,<target>)
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#
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# ex: @$(call remake,Building,gavd,Makefile,gavd)
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# $(1) $(2) $(3) $(4)
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#
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# REL_DIR:
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#
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# Directory relative from the root of the source tree. REL_DIR is
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# built up using the previous value plus the current target
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# directory.
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#
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# ADHD_SOURCE_DIR:
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#
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# The directory containing the sources for the target directory
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# being built. This is used by Makefiles to access files in the
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# source directory. It has the same value as VPATH.
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#
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# THIS_BUILD_DIR:
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#
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# The build directory which is currently being built. This is the
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# same 'pwd', and the directory in which Make is building.
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#
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# The build is performed in the build directory and VPATH is used to
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# allow Make to find the source files in the source directory.
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#
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remake = \
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+($(if $(REL_DIR), \
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export REL_DIR=$${REL_DIR}/$(2), \
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export REL_DIR=$(2)) && \
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$(call mkdir,$(ADHD_BUILD_DIR)/$${REL_DIR}) && \
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$(MESSAGE) "$(1) $${REL_DIR}"; \
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$(MAKE) $(SILENT) \
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-f $(ADHD_DIR)/$${REL_DIR}/$(3) \
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-C $(ADHD_BUILD_DIR)/$${REL_DIR} \
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VPATH=$(ADHD_DIR)/$${REL_DIR} \
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ADHD_SOURCE_DIR=$(ADHD_DIR)/$${REL_DIR} \
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THIS_BUILD_DIR=$(ADHD_BUILD_DIR)/$${REL_DIR} \
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$(4))
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