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function(add_startup_object name)
cmake_parse_arguments(
"ADD_STARTUP_OBJECT"
"ALIAS" # Option argument
"SRC" # Single value arguments
"DEPENDS;COMPILE_OPTIONS" # Multi value arguments
${ARGN}
)
get_fq_target_name(${name} fq_target_name)
get_fq_deps_list(fq_deps_list ${ADD_STARTUP_OBJECT_DEPENDS})
if(ADD_STARTUP_OBJECT_ALIAS)
list(LENGTH ADD_STARTUP_OBJECT_DEPENDS deps_size)
if(NOT (${deps_size} EQUAL "1"))
message(FATAL_ERROR "A startup object alias should have exactly one dependency.")
endif()
list(GET ADD_STARTUP_OBJECT_DEPENDS 0 dep)
get_fq_dep_name(fq_dep_name ${dep})
add_custom_target(${fq_target_name})
add_dependencies(${fq_target_name} ${fq_dep_name})
get_target_property(startup_object ${fq_dep_name} STARTUP_OBJECT)
set_target_properties(
${fq_target_name}
PROPERTIES
"TARGET_TYPE" "${OBJECT_LIBRARY_TARGET_TYPE}"
"STARTUP_OBJECT" "${startup_object}"
"OBJECT_FILES" ""
"DEPS" "${fq_dep_name}"
)
return()
endif()
add_object_library(
${name}.__objects__
SRCS ${ADD_STARTUP_OBJECT_SRC}
DEPENDS ${ADD_STARTUP_OBJECT_DEPENDS}
COMPILE_OPTIONS ${ADD_STARTUP_OBJECT_COMPILE_OPTIONS}
)
set(objfile ${LIBC_BUILD_DIR}/lib/${name}.o)
add_custom_command(
OUTPUT ${objfile}
COMMAND cp $<TARGET_OBJECTS:${fq_target_name}.__objects__> ${objfile}
DEPENDS $<TARGET_OBJECTS:${fq_target_name}.__objects__>
)
add_custom_target(
${fq_target_name}
DEPENDS ${objfile}
)
set_target_properties(
${fq_target_name}
PROPERTIES
"TARGET_TYPE" "${OBJECT_LIBRARY_TARGET_TYPE}"
"STARTUP_OBJECT" "${objfile}"
"OBJECT_FILES" ""
"DEPS" "${fq_target_name}.__objects__"
)
endfunction()
if(NOT (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_ARCHITECTURE}))
message(STATUS "Skipping startup for target architecture ${LIBC_TARGET_ARCHITECTURE}")
return()
endif()
add_subdirectory(${LIBC_TARGET_ARCHITECTURE})
add_startup_object(
crt1
ALIAS
DEPENDS
.${LIBC_TARGET_ARCHITECTURE}.crt1
)
add_startup_object(
crti
SRC
crti.cpp
)
add_startup_object(
crtn
SRC
crtn.cpp
)
add_custom_target(libc-startup)
set(startup_components crt1 crti crtn)
foreach(target IN LISTS startup_components)
set(fq_target_name libc.startup.linux.${target})
add_dependencies(libc-startup ${fq_target_name})
get_target_property(startup_object ${fq_target_name} STARTUP_OBJECT)
install(FILES ${startup_object}
DESTINATION ${CMAKE_INSTALL_LIBDIR}
COMPONENT ${LIBC_COMPONENT})
endforeach()
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