package/pkg-cmake.mk - buildroot - Git at Google

 ################################################################################
 # CMake package infrastructure
 #
 # This file implements an infrastructure that eases development of
 # package .mk files for CMake packages. It should be used for all
 # packages that use CMake as their build system.
 #
 # See the Buildroot documentation for details on the usage of this
 # infrastructure
 #
 # In terms of implementation, this CMake infrastructure requires
 # the .mk file to only specify metadata informations about the
 # package: name, version, download URL, etc.
 #
 # We still allow the package .mk file to override what the different
 # steps are doing, if needed. For example, if <PKG>_BUILD_CMDS is
 # already defined, it is used as the list of commands to perform to
 # build the package, instead of the default CMake behaviour. The
 # package can also define some post operation hooks.
 #
 ################################################################################

 ################################################################################
 # inner-cmake-package -- defines how the configuration, compilation and
 # installation of a CMake package should be done, implements a few hooks to
 # tune the build process and calls the generic package infrastructure to
 # generate the necessary make targets
 #
 #  argument 1 is the lowercase package name
 #  argument 2 is the uppercase package name, including an HOST_ prefix
 #             for host packages
 #  argument 3 is the uppercase package name, without the HOST_ prefix
 #             for host packages
 #  argument 4 is the package directory prefix
 #  argument 5 is the type (target or host)
 ################################################################################

 define inner-cmake-package

 $(2)_CONF_ENV			?=
 $(2)_CONF_OPT			?=
 $(2)_MAKE			?= $(MAKE)
 $(2)_MAKE_ENV			?=
 $(2)_MAKE_OPT			?=
 $(2)_INSTALL_HOST_OPT		?= install
 $(2)_INSTALL_STAGING_OPT	?= DESTDIR=$$(STAGING_DIR) install
 $(2)_INSTALL_TARGET_OPT		?= DESTDIR=$$(TARGET_DIR) install
 $(2)_CLEAN_OPT			?= clean

 $(2)_SRCDIR			= $$($(2)_DIR)/$($(2)_SUBDIR)
 $(2)_BUILDDIR			= $$($(2)_SRCDIR)

 #
 # Configure step. Only define it if not already defined by the package
 # .mk file. And take care of the differences between host and target
 # packages.
 #
 ifndef $(2)_CONFIGURE_CMDS
 ifeq ($(5),target)

 # Configure package for target
 define $(2)_CONFIGURE_CMDS
 	(cd $$($$(PKG)_BUILDDIR) && \
 	rm -f CMakeCache.txt && \
 	$$($$(PKG)_CONF_ENV) $(HOST_DIR)/usr/bin/cmake $$($$(PKG)_SRCDIR) \
 		-DCMAKE_TOOLCHAIN_FILE="$$(HOST_DIR)/usr/share/buildroot/toolchainfile.cmake" \
 		-DCMAKE_INSTALL_PREFIX="/usr" \
 		$$($$(PKG)_CONF_OPT) \
 	)
 endef
 else

 # Configure package for host
 define $(2)_CONFIGURE_CMDS
 	(cd $$($$(PKG)_BUILDDIR) && \
 	rm -f CMakeCache.txt && \
 	$(HOST_DIR)/usr/bin/cmake $$($$(PKG)_SRCDIR) \
 		-DCMAKE_INSTALL_SO_NO_EXE=0 \
 		-DCMAKE_FIND_ROOT_PATH="$$(HOST_DIR)" \
 		-DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM="BOTH" \
 		-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY="BOTH" \
 		-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE="BOTH" \
 		-DCMAKE_INSTALL_PREFIX="$$(HOST_DIR)/usr" \
 		$$($$(PKG)_CONF_OPT) \
 	)
 endef
 endif
 endif

 # This must be repeated from inner-generic-package, otherwise we only get
 # host-cmake in _DEPENDENCIES because of the following line
 $(2)_DEPENDENCIES ?= $(filter-out $(1),$(patsubst host-host-%,host-%,$(addprefix host-,$($(3)_DEPENDENCIES))))

 $(2)_DEPENDENCIES += host-cmake

 #
 # Build step. Only define it if not already defined by the package .mk
 # file.
 #
 ifndef $(2)_BUILD_CMDS
 ifeq ($(5),target)
 define $(2)_BUILD_CMDS
 	$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 else
 define $(2)_BUILD_CMDS
 	$(HOST_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif
 endif

 #
 # Host installation step. Only define it if not already defined by the
 # package .mk file.
 #
 ifndef $(2)_INSTALL_CMDS
 define $(2)_INSTALL_CMDS
 	$(HOST_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) $$($$(PKG)_INSTALL_HOST_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif

 #
 # Staging installation step. Only define it if not already defined by
 # the package .mk file.
 #
 ifndef $(2)_INSTALL_STAGING_CMDS
 define $(2)_INSTALL_STAGING_CMDS
 	$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) $$($$(PKG)_INSTALL_STAGING_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif

 #
 # Target installation step. Only define it if not already defined by
 # the package .mk file.
 #
 ifndef $(2)_INSTALL_TARGET_CMDS
 define $(2)_INSTALL_TARGET_CMDS
 	$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) $$($$(PKG)_INSTALL_TARGET_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif

 #
 # Clean step. Only define it if not already defined by
 # the package .mk file.
 #
 ifndef $(2)_CLEAN_CMDS
 define $(2)_CLEAN_CMDS
 	-$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) $$($$(PKG)_CLEAN_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif

 #
 # Uninstall from staging step. Only define it if not already defined by
 # the package .mk file.
 #
 ifndef $(2)_UNINSTALL_STAGING_CMDS
 define $(2)_UNINSTALL_STAGING_CMDS
 	(cd $$($$(PKG)_BUILDDIR) && sed "s:\(.*\):$$(STAGING_DIR)\1:" install_manifest.txt | xargs rm -f)
 endef
 endif

 #
 # Uninstall from target step. Only define it if not already defined
 # by the package .mk file.
 #
 ifndef $(2)_UNINSTALL_TARGET_CMDS
 define $(2)_UNINSTALL_TARGET_CMDS
 	(cd $$($$(PKG)_BUILDDIR) && sed "s:\(.*\):$$(TARGET_DIR)\1:" install_manifest.txt | xargs rm -f)
 endef
 endif

 # Call the generic package infrastructure to generate the necessary
 # make targets
 $(call inner-generic-package,$(1),$(2),$(3),$(4),$(5))

 endef

 ################################################################################
 # cmake-package -- the target generator macro for CMake packages
 ################################################################################

 cmake-package = $(call inner-cmake-package,$(call pkgname),$(call UPPERCASE,$(call pkgname)),$(call UPPERCASE,$(call pkgname)),$(call pkgparentdir),target)
 host-cmake-package = $(call inner-cmake-package,host-$(call pkgname),$(call UPPERCASE,host-$(call pkgname)),$(call UPPERCASE,$(call pkgname)),$(call pkgparentdir),host)

 ################################################################################
 # Generation of the CMake toolchain file
 ################################################################################

 $(HOST_DIR)/usr/share/buildroot/toolchainfile.cmake:
 	@mkdir -p $(@D)
 	@echo -en "\
 	set(CMAKE_SYSTEM_NAME Linux)\n\
 	set(CMAKE_C_COMPILER $(TARGET_CC_NOCCACHE))\n\
 	set(CMAKE_CXX_COMPILER $(TARGET_CXX_NOCCACHE))\n\
 	set(CMAKE_C_FLAGS \"\$${CMAKE_C_FLAGS} $(TARGET_CFLAGS)\" CACHE STRING \"Buildroot CFLAGS\" FORCE)\n\
 	set(CMAKE_CXX_FLAGS \"\$${CMAKE_CXX_FLAGS} $(TARGET_CXXFLAGS)\" CACHE STRING \"Buildroot CXXFLAGS\" FORCE)\n\
 	set(CMAKE_INSTALL_SO_NO_EXE 0)\n\
 	set(CMAKE_PROGRAM_PATH \"$(HOST_DIR)/usr/bin\")\n\
 	set(CMAKE_FIND_ROOT_PATH \"$(STAGING_DIR)\")\n\
 	set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)\n\
 	set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)\n\
 	set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)\n\
 	set(ENV{PKG_CONFIG_SYSROOT_DIR} \"$(STAGING_DIR)\")\n\
 	" > $@
	################################################################################
	# CMake package infrastructure
	#
	# This file implements an infrastructure that eases development of
	# package .mk files for CMake packages. It should be used for all
	# packages that use CMake as their build system.
	#
	# See the Buildroot documentation for details on the usage of this
	# infrastructure
	#
	# In terms of implementation, this CMake infrastructure requires
	# the .mk file to only specify metadata informations about the
	# package: name, version, download URL, etc.
	#
	# We still allow the package .mk file to override what the different
	# steps are doing, if needed. For example, if <PKG>_BUILD_CMDS is
	# already defined, it is used as the list of commands to perform to
	# build the package, instead of the default CMake behaviour. The
	# package can also define some post operation hooks.
	#
	################################################################################

	################################################################################
	# inner-cmake-package -- defines how the configuration, compilation and
	# installation of a CMake package should be done, implements a few hooks to
	# tune the build process and calls the generic package infrastructure to
	# generate the necessary make targets
	#
	# argument 1 is the lowercase package name
	# argument 2 is the uppercase package name, including an HOST_ prefix
	# for host packages
	# argument 3 is the uppercase package name, without the HOST_ prefix
	# for host packages
	# argument 4 is the package directory prefix
	# argument 5 is the type (target or host)
	################################################################################

	define inner-cmake-package

	$(2)_CONF_ENV ?=
	$(2)_CONF_OPT ?=
	$(2)_MAKE ?= $(MAKE)
	$(2)_MAKE_ENV ?=
	$(2)_MAKE_OPT ?=
	$(2)_INSTALL_HOST_OPT ?= install
	$(2)_INSTALL_STAGING_OPT ?= DESTDIR=$$(STAGING_DIR) install
	$(2)_INSTALL_TARGET_OPT ?= DESTDIR=$$(TARGET_DIR) install
	$(2)_CLEAN_OPT ?= clean

	$(2)_SRCDIR = $$($(2)_DIR)/$($(2)_SUBDIR)
	$(2)_BUILDDIR = $$($(2)_SRCDIR)

	#
	# Configure step. Only define it if not already defined by the package
	# .mk file. And take care of the differences between host and target
	# packages.
	#
	ifndef $(2)_CONFIGURE_CMDS
	ifeq ($(5),target)

	# Configure package for target
	define $(2)_CONFIGURE_CMDS
	(cd $$($$(PKG)_BUILDDIR) && \
	rm -f CMakeCache.txt && \
	$$($$(PKG)_CONF_ENV) $(HOST_DIR)/usr/bin/cmake $$($$(PKG)_SRCDIR) \
	-DCMAKE_TOOLCHAIN_FILE="$$(HOST_DIR)/usr/share/buildroot/toolchainfile.cmake" \
	-DCMAKE_INSTALL_PREFIX="/usr" \
	$$($$(PKG)_CONF_OPT) \
	)
	endef
	else

	# Configure package for host
	define $(2)_CONFIGURE_CMDS
	(cd $$($$(PKG)_BUILDDIR) && \
	rm -f CMakeCache.txt && \
	$(HOST_DIR)/usr/bin/cmake $$($$(PKG)_SRCDIR) \
	-DCMAKE_INSTALL_SO_NO_EXE=0 \
	-DCMAKE_FIND_ROOT_PATH="$$(HOST_DIR)" \
	-DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM="BOTH" \
	-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY="BOTH" \
	-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE="BOTH" \
	-DCMAKE_INSTALL_PREFIX="$$(HOST_DIR)/usr" \
	$$($$(PKG)_CONF_OPT) \
	)
	endef
	endif
	endif

	# This must be repeated from inner-generic-package, otherwise we only get
	# host-cmake in _DEPENDENCIES because of the following line
	$(2)_DEPENDENCIES ?= $(filter-out $(1),$(patsubst host-host-%,host-%,$(addprefix host-,$($(3)_DEPENDENCIES))))

	$(2)_DEPENDENCIES += host-cmake

	#
	# Build step. Only define it if not already defined by the package .mk
	# file.
	#
	ifndef $(2)_BUILD_CMDS
	ifeq ($(5),target)
	define $(2)_BUILD_CMDS
	$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) -C $$($$(PKG)_BUILDDIR)
	endef
	else
	define $(2)_BUILD_CMDS
	$(HOST_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) -C $$($$(PKG)_BUILDDIR)
	endef
	endif
	endif

	#
	# Host installation step. Only define it if not already defined by the
	# package .mk file.
	#
	ifndef $(2)_INSTALL_CMDS
	define $(2)_INSTALL_CMDS
	$(HOST_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) $$($$(PKG)_INSTALL_HOST_OPT) -C $$($$(PKG)_BUILDDIR)
	endef
	endif

	#
	# Staging installation step. Only define it if not already defined by
	# the package .mk file.
	#
	ifndef $(2)_INSTALL_STAGING_CMDS
	define $(2)_INSTALL_STAGING_CMDS
	$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) $$($$(PKG)_INSTALL_STAGING_OPT) -C $$($$(PKG)_BUILDDIR)
	endef
	endif

	#
	# Target installation step. Only define it if not already defined by
	# the package .mk file.
	#
	ifndef $(2)_INSTALL_TARGET_CMDS
	define $(2)_INSTALL_TARGET_CMDS
	$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) $$($$(PKG)_INSTALL_TARGET_OPT) -C $$($$(PKG)_BUILDDIR)
	endef
	endif

	#
	# Clean step. Only define it if not already defined by
	# the package .mk file.
	#
	ifndef $(2)_CLEAN_CMDS
	define $(2)_CLEAN_CMDS
	-$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) $$($$(PKG)_CLEAN_OPT) -C $$($$(PKG)_BUILDDIR)
	endef
	endif

	#
	# Uninstall from staging step. Only define it if not already defined by
	# the package .mk file.
	#
	ifndef $(2)_UNINSTALL_STAGING_CMDS
	define $(2)_UNINSTALL_STAGING_CMDS
	(cd $$($$(PKG)_BUILDDIR) && sed "s:\(.*\):$$(STAGING_DIR)\1:" install_manifest.txt \| xargs rm -f)
	endef
	endif

	#
	# Uninstall from target step. Only define it if not already defined
	# by the package .mk file.
	#
	ifndef $(2)_UNINSTALL_TARGET_CMDS
	define $(2)_UNINSTALL_TARGET_CMDS
	(cd $$($$(PKG)_BUILDDIR) && sed "s:\(.*\):$$(TARGET_DIR)\1:" install_manifest.txt \| xargs rm -f)
	endef
	endif

	# Call the generic package infrastructure to generate the necessary
	# make targets
	$(call inner-generic-package,$(1),$(2),$(3),$(4),$(5))

	endef

	################################################################################
	# cmake-package -- the target generator macro for CMake packages
	################################################################################

	cmake-package = $(call inner-cmake-package,$(call pkgname),$(call UPPERCASE,$(call pkgname)),$(call UPPERCASE,$(call pkgname)),$(call pkgparentdir),target)
	host-cmake-package = $(call inner-cmake-package,host-$(call pkgname),$(call UPPERCASE,host-$(call pkgname)),$(call UPPERCASE,$(call pkgname)),$(call pkgparentdir),host)

	################################################################################
	# Generation of the CMake toolchain file
	################################################################################

	$(HOST_DIR)/usr/share/buildroot/toolchainfile.cmake:
	@mkdir -p $(@D)
	@echo -en "\
	set(CMAKE_SYSTEM_NAME Linux)\n\
	set(CMAKE_C_COMPILER $(TARGET_CC_NOCCACHE))\n\
	set(CMAKE_CXX_COMPILER $(TARGET_CXX_NOCCACHE))\n\
	set(CMAKE_C_FLAGS \"\$${CMAKE_C_FLAGS} $(TARGET_CFLAGS)\" CACHE STRING \"Buildroot CFLAGS\" FORCE)\n\
	set(CMAKE_CXX_FLAGS \"\$${CMAKE_CXX_FLAGS} $(TARGET_CXXFLAGS)\" CACHE STRING \"Buildroot CXXFLAGS\" FORCE)\n\
	set(CMAKE_INSTALL_SO_NO_EXE 0)\n\
	set(CMAKE_PROGRAM_PATH \"$(HOST_DIR)/usr/bin\")\n\
	set(CMAKE_FIND_ROOT_PATH \"$(STAGING_DIR)\")\n\
	set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)\n\
	set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)\n\
	set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)\n\
	set(ENV{PKG_CONFIG_SYSROOT_DIR} \"$(STAGING_DIR)\")\n\
	" > $@