zephyr/arch/arm/CMakeLists.txt
Sebastian Bøe 12f8f76165 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>
2017-11-08 20:00:22 -05:00

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CMake

zephyr_cc_option_ifdef(CONFIG_LTO -flto)
set(ARCH_FOR_cortex-m0 armv6-m )
set(ARCH_FOR_cortex-m0plus armv6-m )
set(ARCH_FOR_cortex-m3 armv7-m )
set(ARCH_FOR_cortex-m4 armv7e-m )
set(ARCH_FOR_cortex-m23 armv8-m.base)
set(ARCH_FOR_cortex-m33 armv8-m.main)
if(${ARCH_FOR_${GCC_M_CPU}})
set(ARCH_FLAG -march=${ARCH_FOR_${GCC_M_CPU}})
endif()
zephyr_compile_options(
-mabi=aapcs
${TOOLCHAIN_C_FLAGS}
${ARCH_FLAG}
)
add_subdirectory(soc)
add_subdirectory(core)