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zephyr/cmake/modules/ccache.cmake

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license: cleanup: add SPDX Apache-2.0 license identifier Update the files which contain no license information with the 'Apache-2.0' SPDX license identifier. Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of Zephyr, which is Apache version 2. Signed-off-by: Anas Nashif <anas.nashif@intel.com>
2019-04-06 21:08:09 +08:00
# SPDX-License-Identifier: Apache-2.0
Introduce cmake-based rewrite of KBuild Introducing CMake is an important step in a larger effort to make Zephyr easy to use for application developers working on different platforms with different development environment needs. Simplified, this change retains Kconfig as-is, and replaces all Makefiles with CMakeLists.txt. The DSL-like Make language that KBuild offers is replaced by a set of CMake extentions. These extentions have either provided simple one-to-one translations of KBuild features or introduced new concepts that replace KBuild concepts. This is a breaking change for existing test infrastructure and build scripts that are maintained out-of-tree. But for FW itself, no porting should be necessary. For users that just want to continue their work with minimal disruption the following should suffice: Install CMake 3.8.2+ Port any out-of-tree Makefiles to CMake. Learn the absolute minimum about the new command line interface: $ cd samples/hello_world $ mkdir build && cd build $ cmake -DBOARD=nrf52_pca10040 .. $ cd build $ make PR: zephyrproject-rtos#4692 docs: http://docs.zephyrproject.org/getting_started/getting_started.html Signed-off-by: Sebastian Boe <sebastian.boe@nordicsemi.no>
2017-10-27 21:43:34 +08:00
# Use ccache if it is installed, unless the user explicitly disables
# it by setting USE_CCACHE=0.
cmake: Zephyr CMake package and CMake modules Create a cmake/modules folder containing all Zephyr CMake modules. All Zephyr cmake files that are included from boilerplate are now converted into CMake modules which can be individually loaded. The Zephyr CMake package is updated to support loading of individual CMake modules using the COMPONENTS argument to `find_package(Zephyr)`. If the COMPONENTS argument is not specified, the default Zephyr build system will load. If COMPONENTS is specified then, only those components and the dependencies will be loaded. If a Zephyr CMake module depends on another CMake module which has not been loaded, it will automatically be loaded. This allows us to modularize and reuse individual parts of the Zephyr CMake build system in a more flexible way in future. Such usage could be: - Higher livel multi image build system - Invocation of individual components, for example dts processing by twister without loading all build code - Doc build - Unittesting With this new CMake package and CMake module scheme then direct sourcing of boilerplate.cmake has been deprecated. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
2021-12-17 00:13:54 +08:00
include_guard(GLOBAL)
Introduce cmake-based rewrite of KBuild Introducing CMake is an important step in a larger effort to make Zephyr easy to use for application developers working on different platforms with different development environment needs. Simplified, this change retains Kconfig as-is, and replaces all Makefiles with CMakeLists.txt. The DSL-like Make language that KBuild offers is replaced by a set of CMake extentions. These extentions have either provided simple one-to-one translations of KBuild features or introduced new concepts that replace KBuild concepts. This is a breaking change for existing test infrastructure and build scripts that are maintained out-of-tree. But for FW itself, no porting should be necessary. For users that just want to continue their work with minimal disruption the following should suffice: Install CMake 3.8.2+ Port any out-of-tree Makefiles to CMake. Learn the absolute minimum about the new command line interface: $ cd samples/hello_world $ mkdir build && cd build $ cmake -DBOARD=nrf52_pca10040 .. $ cd build $ make PR: zephyrproject-rtos#4692 docs: http://docs.zephyrproject.org/getting_started/getting_started.html Signed-off-by: Sebastian Boe <sebastian.boe@nordicsemi.no>
2017-10-27 21:43:34 +08:00
if(USE_CCACHE STREQUAL "0")
else()
find_program(CCACHE_FOUND ccache)
if(CCACHE_FOUND)
set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
endif()
endif()