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375
myapps/blinky-old-32mg/Makefile
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375
myapps/blinky-old-32mg/Makefile
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# boilermake: A reusable, but flexible, boilerplate Makefile.
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#
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# Copyright 2008, 2009, 2010 Dan Moulding, Alan T. DeKok
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Caution: Don't edit this Makefile! Create your own main.mk and other
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# submakefiles, which will be included by this Makefile.
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# Only edit this if you need to modify boilermake's behavior (fix
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# bugs, add features, etc).
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# Note: Parameterized "functions" in this makefile that are marked with
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# "USE WITH EVAL" are only useful in conjuction with eval. This is
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# because those functions result in a block of Makefile syntax that must
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# be evaluated after expansion. Since they must be used with eval, most
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# instances of "$" within them need to be escaped with a second "$" to
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# accomodate the double expansion that occurs when eval is invoked.
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# ADD_CLEAN_RULE - Parameterized "function" that adds a new rule and phony
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# target for cleaning the specified target (removing its build-generated
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# files).
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#
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# USE WITH EVAL
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#
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define ADD_CLEAN_RULE
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clean: clean_${1}
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.PHONY: clean_${1}
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clean_${1}:
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$$(strip rm -f ${TARGET_DIR}/${1} $${${1}_OBJS:%.o=%.[doP]})
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$${${1}_POSTCLEAN}
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endef
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# ADD_OBJECT_RULE - Parameterized "function" that adds a pattern rule for
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# building object files from source files with the filename extension
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# specified in the second argument. The first argument must be the name of the
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# base directory where the object files should reside (such that the portion
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# of the path after the base directory will match the path to corresponding
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# source files). The third argument must contain the rules used to compile the
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# source files into object code form.
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#
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# USE WITH EVAL
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#
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define ADD_OBJECT_RULE
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${1}/%.o: ${2}
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${3}
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endef
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# ADD_TARGET_RULE - Parameterized "function" that adds a new target to the
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# Makefile. The target may be an executable or a library. The two allowable
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# types of targets are distinguished based on the name: library targets must
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# end with the traditional ".a" extension.
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#
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# USE WITH EVAL
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#
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define ADD_TARGET_RULE
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ifeq "$$(suffix ${1})" ".a"
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# Add a target for creating a static library.
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$${TARGET_DIR}/${1}: $${${1}_OBJS}
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@mkdir -p $$(dir $$@)
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$$(strip $${AR} $${ARFLAGS} $$@ $${${1}_OBJS})
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$${${1}_POSTMAKE}
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else
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# Add a target for linking an executable. First, attempt to select the
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# appropriate front-end to use for linking. This might not choose the
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# right one (e.g. if linking with a C++ static library, but all other
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# sources are C sources), so the user makefile is allowed to specify a
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# linker to be used for each target.
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ifeq "$$(strip $${${1}_LINKER})" ""
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# No linker was explicitly specified to be used for this target. If
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# there are any C++ sources for this target, use the C++ compiler.
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# For all other targets, default to using the C compiler.
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ifneq "$$(strip $$(filter $${CXX_SRC_EXTS},$${${1}_SOURCES}))" ""
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${1}_LINKER = $${CXX}
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else
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${1}_LINKER = $${CC}
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endif
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endif
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$${TARGET_DIR}/${1}: $${${1}_OBJS} $${${1}_PREREQS}
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@mkdir -p $$(dir $$@)
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$$(strip $${${1}_LINKER} -o $$@ $${LDFLAGS} $${${1}_LDFLAGS} \
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$${${1}_OBJS} $${LDLIBS} $${${1}_LDLIBS})
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$${${1}_POSTMAKE}
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endif
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endef
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# CANONICAL_PATH - Given one or more paths, converts the paths to the canonical
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# form. The canonical form is the path, relative to the project's top-level
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# directory (the directory from which "make" is run), and without
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# any "./" or "../" sequences. For paths that are not located below the
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# top-level directory, the canonical form is the absolute path (i.e. from
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# the root of the filesystem) also without "./" or "../" sequences.
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define CANONICAL_PATH
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$(patsubst ${CURDIR}/%,%,$(abspath ${1}))
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endef
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# COMPILE_C_CMDS - Commands for compiling C source code.
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define COMPILE_C_CMDS
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@mkdir -p $(dir $@)
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$(strip ${CC} -o $@ -c -MD ${CFLAGS} ${SRC_CFLAGS} ${INCDIRS} \
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${SRC_INCDIRS} ${SRC_DEFS} ${DEFS} $<)
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@cp ${@:%$(suffix $@)=%.d} ${@:%$(suffix $@)=%.P}; \
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sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
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-e '/^$$/ d' -e 's/$$/ :/' < ${@:%$(suffix $@)=%.d} \
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>> ${@:%$(suffix $@)=%.P}; \
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rm -f ${@:%$(suffix $@)=%.d}
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endef
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# COMPILE_CXX_CMDS - Commands for compiling C++ source code.
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define COMPILE_CXX_CMDS
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@mkdir -p $(dir $@)
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$(strip ${CXX} -o $@ -c -MD ${CXXFLAGS} ${SRC_CXXFLAGS} ${INCDIRS} \
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${SRC_INCDIRS} ${SRC_DEFS} ${DEFS} $<)
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@cp ${@:%$(suffix $@)=%.d} ${@:%$(suffix $@)=%.P}; \
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sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
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-e '/^$$/ d' -e 's/$$/ :/' < ${@:%$(suffix $@)=%.d} \
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>> ${@:%$(suffix $@)=%.P}; \
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rm -f ${@:%$(suffix $@)=%.d}
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endef
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# INCLUDE_SUBMAKEFILE - Parameterized "function" that includes a new
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# "submakefile" fragment into the overall Makefile. It also recursively
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# includes all submakefiles of the specified submakefile fragment.
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#
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# USE WITH EVAL
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#
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define INCLUDE_SUBMAKEFILE
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# Initialize all variables that can be defined by a makefile fragment, then
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# include the specified makefile fragment.
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TARGET :=
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TGT_CFLAGS :=
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TGT_CXXFLAGS :=
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TGT_DEFS :=
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TGT_INCDIRS :=
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TGT_LDFLAGS :=
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TGT_LDLIBS :=
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TGT_LINKER :=
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TGT_POSTCLEAN :=
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TGT_POSTMAKE :=
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TGT_PREREQS :=
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SOURCES :=
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SRC_CFLAGS :=
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SRC_CXXFLAGS :=
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SRC_DEFS :=
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SRC_INCDIRS :=
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SUBMAKEFILES :=
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# A directory stack is maintained so that the correct paths are used as we
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# recursively include all submakefiles. Get the makefile's directory and
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# push it onto the stack.
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DIR := $(call CANONICAL_PATH,$(dir ${1}))
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DIR_STACK := $$(call PUSH,$${DIR_STACK},$${DIR})
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include ${1}
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# Initialize internal local variables.
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OBJS :=
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# Ensure that valid values are set for BUILD_DIR and TARGET_DIR.
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ifeq "$$(strip $${BUILD_DIR})" ""
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BUILD_DIR := build
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endif
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ifeq "$$(strip $${TARGET_DIR})" ""
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TARGET_DIR := .
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endif
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# Determine which target this makefile's variables apply to. A stack is
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# used to keep track of which target is the "current" target as we
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# recursively include other submakefiles.
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ifneq "$$(strip $${TARGET})" ""
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# This makefile defined a new target. Target variables defined by this
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# makefile apply to this new target. Initialize the target's variables.
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TGT := $$(strip $${TARGET})
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ALL_TGTS += $${TGT}
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$${TGT}_CFLAGS := $${TGT_CFLAGS}
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$${TGT}_CXXFLAGS := $${TGT_CXXFLAGS}
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$${TGT}_DEFS := $${TGT_DEFS}
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$${TGT}_DEPS :=
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TGT_INCDIRS := $$(call QUALIFY_PATH,$${DIR},$${TGT_INCDIRS})
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TGT_INCDIRS := $$(call CANONICAL_PATH,$${TGT_INCDIRS})
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$${TGT}_INCDIRS := $${TGT_INCDIRS}
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$${TGT}_LDFLAGS := $${TGT_LDFLAGS}
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$${TGT}_LDLIBS := $${TGT_LDLIBS}
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$${TGT}_LINKER := $${TGT_LINKER}
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$${TGT}_OBJS :=
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$${TGT}_POSTCLEAN := $${TGT_POSTCLEAN}
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$${TGT}_POSTMAKE := $${TGT_POSTMAKE}
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$${TGT}_PREREQS := $$(addprefix $${TARGET_DIR}/,$${TGT_PREREQS})
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$${TGT}_SOURCES :=
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else
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# The values defined by this makefile apply to the the "current" target
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# as determined by which target is at the top of the stack.
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TGT := $$(strip $$(call PEEK,$${TGT_STACK}))
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$${TGT}_CFLAGS += $${TGT_CFLAGS}
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$${TGT}_CXXFLAGS += $${TGT_CXXFLAGS}
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$${TGT}_DEFS += $${TGT_DEFS}
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TGT_INCDIRS := $$(call QUALIFY_PATH,$${DIR},$${TGT_INCDIRS})
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TGT_INCDIRS := $$(call CANONICAL_PATH,$${TGT_INCDIRS})
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$${TGT}_INCDIRS += $${TGT_INCDIRS}
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$${TGT}_LDFLAGS += $${TGT_LDFLAGS}
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$${TGT}_LDLIBS += $${TGT_LDLIBS}
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$${TGT}_POSTCLEAN += $${TGT_POSTCLEAN}
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$${TGT}_POSTMAKE += $${TGT_POSTMAKE}
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$${TGT}_PREREQS += $${TGT_PREREQS}
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endif
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# Push the current target onto the target stack.
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TGT_STACK := $$(call PUSH,$${TGT_STACK},$${TGT})
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ifneq "$$(strip $${SOURCES})" ""
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# This makefile builds one or more objects from source. Validate the
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# specified sources against the supported source file types.
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BAD_SRCS := $$(strip $$(filter-out $${ALL_SRC_EXTS},$${SOURCES}))
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ifneq "$${BAD_SRCS}" ""
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$$(error Unsupported source file(s) found in ${1} [$${BAD_SRCS}])
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endif
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# Qualify and canonicalize paths.
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SOURCES := $$(call QUALIFY_PATH,$${DIR},$${SOURCES})
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SOURCES := $$(call CANONICAL_PATH,$${SOURCES})
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SRC_INCDIRS := $$(call QUALIFY_PATH,$${DIR},$${SRC_INCDIRS})
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SRC_INCDIRS := $$(call CANONICAL_PATH,$${SRC_INCDIRS})
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||||
# Save the list of source files for this target.
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$${TGT}_SOURCES += $${SOURCES}
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# Convert the source file names to their corresponding object file
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# names.
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OBJS := $$(addprefix $${BUILD_DIR}/$$(call CANONICAL_PATH,$${TGT})/,\
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$$(addsuffix .o,$$(basename $${SOURCES})))
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# Add the objects to the current target's list of objects, and create
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# target-specific variables for the objects based on any source
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# variables that were defined.
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$${TGT}_OBJS += $${OBJS}
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$${TGT}_DEPS += $${OBJS:%.o=%.P}
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$${OBJS}: SRC_CFLAGS := $${$${TGT}_CFLAGS} $${SRC_CFLAGS}
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$${OBJS}: SRC_CXXFLAGS := $${$${TGT}_CXXFLAGS} $${SRC_CXXFLAGS}
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$${OBJS}: SRC_DEFS := $$(addprefix -D,$${$${TGT}_DEFS} $${SRC_DEFS})
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$${OBJS}: SRC_INCDIRS := $$(addprefix -I,\
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$${$${TGT}_INCDIRS} $${SRC_INCDIRS})
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endif
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ifneq "$$(strip $${SUBMAKEFILES})" ""
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# This makefile has submakefiles. Recursively include them.
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$$(foreach MK,$${SUBMAKEFILES},\
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$$(eval $$(call INCLUDE_SUBMAKEFILE,\
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$$(call CANONICAL_PATH,\
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$$(call QUALIFY_PATH,$${DIR},$${MK})))))
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endif
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# Reset the "current" target to it's previous value.
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TGT_STACK := $$(call POP,$${TGT_STACK})
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TGT := $$(call PEEK,$${TGT_STACK})
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# Reset the "current" directory to it's previous value.
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DIR_STACK := $$(call POP,$${DIR_STACK})
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DIR := $$(call PEEK,$${DIR_STACK})
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endef
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# MIN - Parameterized "function" that results in the minimum lexical value of
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# the two values given.
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define MIN
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$(firstword $(sort ${1} ${2}))
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endef
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# PEEK - Parameterized "function" that results in the value at the top of the
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# specified colon-delimited stack.
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define PEEK
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$(lastword $(subst :, ,${1}))
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endef
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# POP - Parameterized "function" that pops the top value off of the specified
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# colon-delimited stack, and results in the new value of the stack. Note that
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# the popped value cannot be obtained using this function; use peek for that.
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define POP
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${1:%:$(lastword $(subst :, ,${1}))=%}
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||||
endef
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||||
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||||
# PUSH - Parameterized "function" that pushes a value onto the specified colon-
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# delimited stack, and results in the new value of the stack.
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define PUSH
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${2:%=${1}:%}
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endef
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||||
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||||
# QUALIFY_PATH - Given a "root" directory and one or more paths, qualifies the
|
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# paths using the "root" directory (i.e. appends the root directory name to
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# the paths) except for paths that are absolute.
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||||
define QUALIFY_PATH
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||||
$(addprefix ${1}/,$(filter-out /%,${2})) $(filter /%,${2})
|
||||
endef
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||||
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||||
###############################################################################
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||||
#
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||||
# Start of Makefile Evaluation
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||||
#
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||||
###############################################################################
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||||
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||||
# Older versions of GNU Make lack capabilities needed by boilermake.
|
||||
# With older versions, "make" may simply output "nothing to do", likely leading
|
||||
# to confusion. To avoid this, check the version of GNU make up-front and
|
||||
# inform the user if their version of make doesn't meet the minimum required.
|
||||
MIN_MAKE_VERSION := 3.81
|
||||
MIN_MAKE_VER_MSG := boilermake requires GNU Make ${MIN_MAKE_VERSION} or greater
|
||||
ifeq "${MAKE_VERSION}" ""
|
||||
$(info GNU Make not detected)
|
||||
$(error ${MIN_MAKE_VER_MSG})
|
||||
endif
|
||||
ifneq "${MIN_MAKE_VERSION}" "$(call MIN,${MIN_MAKE_VERSION},${MAKE_VERSION})"
|
||||
$(info This is GNU Make version ${MAKE_VERSION})
|
||||
$(error ${MIN_MAKE_VER_MSG})
|
||||
endif
|
||||
|
||||
# Define the source file extensions that we know how to handle.
|
||||
C_SRC_EXTS := %.c %.S
|
||||
CXX_SRC_EXTS := %.C %.cc %.cp %.cpp %.CPP %.cxx %.c++
|
||||
ALL_SRC_EXTS := ${C_SRC_EXTS} ${CXX_SRC_EXTS}
|
||||
|
||||
# Initialize global variables.
|
||||
ALL_TGTS :=
|
||||
DEFS :=
|
||||
DIR_STACK :=
|
||||
INCDIRS :=
|
||||
TGT_STACK :=
|
||||
|
||||
# Include the main user-supplied submakefile. This also recursively includes
|
||||
# all other user-supplied submakefiles.
|
||||
$(eval $(call INCLUDE_SUBMAKEFILE,main.mk))
|
||||
|
||||
# Perform post-processing on global variables as needed.
|
||||
DEFS := $(addprefix -D,${DEFS})
|
||||
INCDIRS := $(addprefix -I,$(call CANONICAL_PATH,${INCDIRS}))
|
||||
|
||||
# Define the "all" target (which simply builds all user-defined targets) as the
|
||||
# default goal.
|
||||
.PHONY: all
|
||||
all: $(addprefix ${TARGET_DIR}/,${ALL_TGTS})
|
||||
|
||||
# Add a new target rule for each user-defined target.
|
||||
$(foreach TGT,${ALL_TGTS},\
|
||||
$(eval $(call ADD_TARGET_RULE,${TGT})))
|
||||
|
||||
# Add pattern rule(s) for creating compiled object code from C source.
|
||||
$(foreach TGT,${ALL_TGTS},\
|
||||
$(foreach EXT,${C_SRC_EXTS},\
|
||||
$(eval $(call ADD_OBJECT_RULE,${BUILD_DIR}/$(call CANONICAL_PATH,${TGT}),\
|
||||
${EXT},$${COMPILE_C_CMDS}))))
|
||||
|
||||
# Add pattern rule(s) for creating compiled object code from C++ source.
|
||||
$(foreach TGT,${ALL_TGTS},\
|
||||
$(foreach EXT,${CXX_SRC_EXTS},\
|
||||
$(eval $(call ADD_OBJECT_RULE,${BUILD_DIR}/$(call CANONICAL_PATH,${TGT}),\
|
||||
${EXT},$${COMPILE_CXX_CMDS}))))
|
||||
|
||||
# Add "clean" rules to remove all build-generated files.
|
||||
.PHONY: clean
|
||||
$(foreach TGT,${ALL_TGTS},\
|
||||
$(eval $(call ADD_CLEAN_RULE,${TGT})))
|
||||
|
||||
# Include generated rules that define additional (header) dependencies.
|
||||
$(foreach TGT,${ALL_TGTS},\
|
||||
$(eval -include ${${TGT}_DEPS}))
|
||||
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