2630fbaa75
Allow a given toolchain to specify Kconfig options that might be
relevant to a feature available in that toolchain.
For example, the ARM embedded GNU toolchain supports two variants of
newlib and you select the smaller one via a spec file. We can use a
Kconfig option like HAS_NEWLIB_LIBC_NANO to convey that this feature is
supported by that toolchain.
We look for the toolchain Kconfig in ${TOOLCHAIN_KCONFIG_DIR}/Kconfig,
and default TOOLCHAIN_KCONFIG_DIR to:
${TOOLCHAIN_ROOT}/cmake/toolchain/${ZEPHYR_TOOLCHAIN_VARIANT})
toolchain specific cmake files can override the default if needed.
Additionally tweaked the zephyr/generic.cmake to use
${CMAKE_CURRENT_LIST_DIR} to reduce some duplication.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
73 lines
2.7 KiB
CMake
73 lines
2.7 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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if(NOT TOOLCHAIN_ROOT)
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if(DEFINED ENV{TOOLCHAIN_ROOT})
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# Support for out-of-tree toolchain
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set(TOOLCHAIN_ROOT $ENV{TOOLCHAIN_ROOT})
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else()
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# Default toolchain cmake file
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set(TOOLCHAIN_ROOT ${ZEPHYR_BASE})
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endif()
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endif()
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# Don't inherit compiler flags from the environment
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foreach(var CFLAGS CXXFLAGS)
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if(DEFINED ENV{${var}})
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message(WARNING "The environment variable '${var}' was set to $ENV{${var}},
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but Zephyr ignores flags from the environment. Use 'cmake -DEXTRA_${var}=$ENV{${var}}' instead.")
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unset(ENV{${var}})
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endif()
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endforeach()
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# Until we completely deprecate it
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if(NOT DEFINED ENV{ZEPHYR_TOOLCHAIN_VARIANT})
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if(DEFINED ENV{ZEPHYR_GCC_VARIANT})
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message(WARNING "ZEPHYR_GCC_VARIANT is deprecated, please use ZEPHYR_TOOLCHAIN_VARIANT instead")
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set(ZEPHYR_TOOLCHAIN_VARIANT $ENV{ZEPHYR_GCC_VARIANT})
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endif()
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endif()
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if(NOT ZEPHYR_TOOLCHAIN_VARIANT)
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if(DEFINED ENV{ZEPHYR_TOOLCHAIN_VARIANT})
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set(ZEPHYR_TOOLCHAIN_VARIANT $ENV{ZEPHYR_TOOLCHAIN_VARIANT})
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elseif(CROSS_COMPILE OR (DEFINED ENV{CROSS_COMPILE}))
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set(ZEPHYR_TOOLCHAIN_VARIANT cross-compile)
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endif()
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endif()
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# Until we completely deprecate it
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if("${ZEPHYR_TOOLCHAIN_VARIANT}" STREQUAL "gccarmemb")
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message(WARNING "gccarmemb is deprecated, please use gnuarmemb instead")
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set(ZEPHYR_TOOLCHAIN_VARIANT "gnuarmemb")
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endif()
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# Host-tools don't unconditionally set TOOLCHAIN_HOME anymore,
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# but in case Zephyr's SDK toolchain is used, set TOOLCHAIN_HOME
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if("${ZEPHYR_TOOLCHAIN_VARIANT}" STREQUAL "zephyr")
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set(TOOLCHAIN_HOME ${HOST_TOOLS_HOME})
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endif()
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set(TOOLCHAIN_ROOT ${TOOLCHAIN_ROOT} CACHE STRING "Zephyr toolchain root")
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assert(TOOLCHAIN_ROOT "Zephyr toolchain root path invalid: please set the TOOLCHAIN_ROOT-variable")
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set(ZEPHYR_TOOLCHAIN_VARIANT ${ZEPHYR_TOOLCHAIN_VARIANT} CACHE STRING "Zephyr toolchain variant")
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assert(ZEPHYR_TOOLCHAIN_VARIANT "Zephyr toolchain variant invalid: please set the ZEPHYR_TOOLCHAIN_VARIANT-variable")
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# Pick host system's toolchain if we are targeting posix
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if(${ARCH} STREQUAL "posix")
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if(NOT "${ZEPHYR_TOOLCHAIN_VARIANT}" STREQUAL "llvm")
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set(ZEPHYR_TOOLCHAIN_VARIANT "host")
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endif()
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endif()
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# Configure the toolchain based on what SDK/toolchain is in use.
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include(${TOOLCHAIN_ROOT}/cmake/toolchain/${ZEPHYR_TOOLCHAIN_VARIANT}/generic.cmake)
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set_ifndef(TOOLCHAIN_KCONFIG_DIR ${TOOLCHAIN_ROOT}/cmake/toolchain/${ZEPHYR_TOOLCHAIN_VARIANT})
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# Configure the toolchain based on what toolchain technology is used
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# (gcc, host-gcc etc.)
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include(${TOOLCHAIN_ROOT}/cmake/compiler/${COMPILER}/generic.cmake OPTIONAL)
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include(${TOOLCHAIN_ROOT}/cmake/linker/${LINKER}/generic.cmake OPTIONAL)
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include(${TOOLCHAIN_ROOT}/cmake/bintools/${BINTOOLS}/generic.cmake OPTIONAL)
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