cmake standalone build

Makefile

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+############################################################################
+#
+# Copyright (c) 2018 ECL Development Team. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name PX4 nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+# Parsing
+# --------------------------------------------------------------------
+# assume 1st argument passed is the main target, the
+# rest are arguments to pass to the makefile generated
+# by cmake in the subdirectory
+FIRST_ARG := $(firstword $(MAKECMDGOALS))
+ARGS := $(wordlist 2,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS))
+j ?= 4
+
+NINJA_BIN := ninja
+ifndef NO_NINJA_BUILD
+	NINJA_BUILD := $(shell $(NINJA_BIN) --version 2>/dev/null)
+
+	ifndef NINJA_BUILD
+		NINJA_BIN := ninja-build
+		NINJA_BUILD := $(shell $(NINJA_BIN) --version 2>/dev/null)
+	endif
+endif
+
+ifdef NINJA_BUILD
+	PX4_CMAKE_GENERATOR := Ninja
+	PX4_MAKE := $(NINJA_BIN)
+
+	ifdef VERBOSE
+		PX4_MAKE_ARGS := -v
+	else
+		PX4_MAKE_ARGS :=
+	endif
+else
+	ifdef SYSTEMROOT
+		# Windows
+		PX4_CMAKE_GENERATOR := "MSYS\ Makefiles"
+	else
+		PX4_CMAKE_GENERATOR := "Unix\ Makefiles"
+	endif
+	PX4_MAKE = $(MAKE)
+	PX4_MAKE_ARGS = -j$(j) --no-print-directory
+endif
+
+SRC_DIR := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
+
+# Functions
+# --------------------------------------------------------------------
+# describe how to build a cmake config
+define cmake-build
++@$(eval BUILD_DIR = $(SRC_DIR)/build/$@$(BUILD_DIR_SUFFIX))
++@if [ $(PX4_CMAKE_GENERATOR) = "Ninja" ] && [ -e $(BUILD_DIR)/Makefile ]; then rm -rf $(BUILD_DIR); fi
++@if [ ! -e $(BUILD_DIR)/CMakeCache.txt ]; then mkdir -p $(BUILD_DIR) && cd $(BUILD_DIR) && cmake $(2) -G"$(PX4_CMAKE_GENERATOR)" $(CMAKE_ARGS) || (rm -rf $(BUILD_DIR)); fi
++@(cd $(BUILD_DIR) && $(PX4_MAKE) $(PX4_MAKE_ARGS) $(ARGS))
+endef
+
+
+all:
+	$(call cmake-build,$@,$(SRC_DIR))
+
+
+# Cleanup
+# --------------------------------------------------------------------
+.PHONY: clean distclean
+
+clean:
+	@rm -rf $(SRC_DIR)/build
+	
+distclean:
+	@git clean -ff -x -d .
+	
+	
+