d017a5ab57
This allows for inclusion of out-of-tree toolchain cmake files relating to compiler and linker for both target and generic toolchains. The base path used was ZEPHYR_BASE, instead of TOOLCHAIN_ROOT, thus making it impossible to load the out-of-tree toolchain specific cmake files. In addition, the generic toolchain may now specify a generic cmake file for the linker, similar to the target toolchain linker. The intent here is to abstract Zephyr's dependence on toolchains, thus allowing for easier porting to other, perhaps commercial, toolchains and/or usecases. No functional change expected. Signed-off-by: Danny Oerndrup <daor@demant.com>
70 lines
2.6 KiB
CMake
70 lines
2.6 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/${ZEPHYR_TOOLCHAIN_VARIANT}/generic.cmake)
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# Configure the toolchain based on what toolchain technology is used
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# (gcc, host-gcc etc.)
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include(${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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