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77 lines
3.3 KiB
CMake
77 lines
3.3 KiB
CMake
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# Copyright (C) 2015 RoboVM AB
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Merges the object files in a sttaic lib into a single object file and
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# overwrites the static lib with a new static lib only containing this single
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# object file. Will not do anything if CMAKE_BUILD_TYPE is 'debug' as it
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# destroys the debug info. Only the specified symbols will be externally
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# visible in the resulting static lib.
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# Usage: merge_static_lib_object_files(lib sym1 sym2 ... symn)
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function(merge_static_lib_object_files lib)
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if (NOT CMAKE_BUILD_TYPE STREQUAL "debug")
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set(exported_symbols ${ARGV})
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list(REMOVE_AT exported_symbols 0)
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if (APPLE)
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foreach(sym ${exported_symbols})
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list(APPEND exported_symbols_args "-exported_symbol")
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list(APPEND exported_symbols_args "_${sym}")
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endforeach()
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string(REPLACE ";" ", " exported_symbols_joined "${exported_symbols}")
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string(REPLACE ";" " " exported_symbols_args_joined "${exported_symbols_args}")
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add_custom_command(TARGET ${lib}
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COMMAND echo Merging object files in $<TARGET_FILE:${lib}> with exported symbols: ${exported_symbols_joined}
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COMMAND echo ld -arch ${CARCH} -r ${exported_symbols_args_joined} -all_load $<TARGET_FILE:${lib}> -o ${CMAKE_CURRENT_BINARY_DIR}/merged.o
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COMMAND ld -arch ${CARCH} -r ${exported_symbols_args} -all_load $<TARGET_FILE:${lib}> -o ${CMAKE_CURRENT_BINARY_DIR}/merged.o
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COMMAND rm -f $<TARGET_FILE:${lib}>
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COMMAND ar rcs $<TARGET_FILE:${lib}> ${CMAKE_CURRENT_BINARY_DIR}/merged.o
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)
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else()
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# Linux
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set(EMULATION_MODE elf_i386)
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if(64_BIT)
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set(EMULATION_MODE elf_x86_64)
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endif()
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message(STATUS "Format ${FORMAT}")
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foreach(sym ${exported_symbols})
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list(APPEND exported_symbols_args "-G")
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list(APPEND exported_symbols_args "${sym}")
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endforeach()
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string(REPLACE ";" ", " exported_symbols_joined "${exported_symbols}")
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string(REPLACE ";" " " exported_symbols_args_joined "${exported_symbols_args}")
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add_custom_command(TARGET ${lib}
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COMMAND echo Merging object files in $<TARGET_FILE:${lib}> with exported symbols: ${exported_symbols_joined}
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COMMAND echo ld -m ${EMULATION_MODE} -r --whole-archive $<TARGET_FILE:${lib}> -o ${CMAKE_CURRENT_BINARY_DIR}/tmp.o
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COMMAND ld -m ${EMULATION_MODE} -r --whole-archive $<TARGET_FILE:${lib}> -o ${CMAKE_CURRENT_BINARY_DIR}/tmp.o
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COMMAND echo objcopy -w ${exported_symbols_args} ${CMAKE_CURRENT_BINARY_DIR}/tmp.o ${CMAKE_CURRENT_BINARY_DIR}/merged.o
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COMMAND objcopy -w ${exported_symbols_args} ${CMAKE_CURRENT_BINARY_DIR}/tmp.o ${CMAKE_CURRENT_BINARY_DIR}/merged.o
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COMMAND rm -f $<TARGET_FILE:${lib}>
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COMMAND ar rcs $<TARGET_FILE:${lib}> ${CMAKE_CURRENT_BINARY_DIR}/merged.o
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)
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endif()
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endif()
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endfunction()
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