cmake: Support passing syscall include directories through CMake
Introduce the CMake variable SYSCALL_INCLUDE_DIRS to support out-of-tree syscall declarations. Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
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2 changed files with 22 additions and 8 deletions
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@ -561,16 +561,21 @@ else()
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set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${syscalls_subdirs_txt})
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endif()
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# SYSCALL_INCLUDE_DIRECTORY will include the directories that needs to be
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# searched for syscall declarations if CONFIG_APPLICATION_DEFINED_SYSCALL is set
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# syscall declarations are searched for in the SYSCALL_INCLUDE_DIRS
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if(CONFIG_APPLICATION_DEFINED_SYSCALL)
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set(SYSCALL_INCLUDE_DIRECTORY --include ${APPLICATION_SOURCE_DIR})
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list(APPEND SYSCALL_INCLUDE_DIRS ${APPLICATION_SOURCE_DIR})
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endif()
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if(CONFIG_ZTEST)
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set(SYSCALL_ZTEST_DIRECTORY --include ${ZEPHYR_BASE}/subsys/testsuite/ztest/include)
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list(APPEND SYSCALL_INCLUDE_DIRS ${ZEPHYR_BASE}/subsys/testsuite/ztest/include)
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endif()
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foreach(d ${SYSCALL_INCLUDE_DIRS})
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list(APPEND parse_syscalls_include_args
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--include ${d}
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)
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endforeach()
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add_custom_command(
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OUTPUT
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${syscalls_json}
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@ -578,8 +583,7 @@ add_custom_command(
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${PYTHON_EXECUTABLE}
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${ZEPHYR_BASE}/scripts/parse_syscalls.py
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--include ${ZEPHYR_BASE}/include # Read files from this dir
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${SYSCALL_INCLUDE_DIRECTORY}
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${SYSCALL_ZTEST_DIRECTORY}
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${parse_syscalls_include_args} # Read files from these dirs also
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--json-file ${syscalls_json} # Write this file
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DEPENDS ${syscalls_subdirs_trigger} ${PARSE_SYSCALLS_HEADER_DEPENDS}
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)
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@ -26,8 +26,9 @@ Components
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All system calls have the following components:
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* A **C prototype** for the API, declared in some header under ``include/`` and
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prefixed with :c:macro:`__syscall`. This prototype is never implemented
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* A **C prototype** prefixed with :c:macro:`__syscall` for the API. It
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will be declared in some header under ``include/`` or in another
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``SYSCALL_INCLUDE_DIRS`` directory. This prototype is never implemented
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manually, instead it gets created by the :ref:`gen_syscalls.py` script.
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What gets generated is an inline function which either calls the
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implementation function directly (if called from supervisor mode) or goes
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@ -88,6 +89,15 @@ bottom of ``include/sensor.h``:
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#include <syscalls/sensor.h>
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C prototype functions must be declared in one of the directories
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listed in the CMake variable ``SYSCALL_INCLUDE_DIRS``. This list
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always contains ``${ZEPHYR_BASE}/include``, but will also contain
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``APPLICATION_SOURCE_DIR`` when ``CONFIG_APPLICATION_DEFINED_SYSCALL``
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is set, or ``${ZEPHYR_BASE}/subsys/testsuite/ztest/include`` when
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``CONFIG_ZTEST`` is set. Additional paths can be added to the list
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through the CMake command line or in CMake code that is run before
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``${ZEPHYR_BASE}/cmake/app/boilerplate.cmake`` is run.
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Invocation Context
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==================
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