Michael Moss
904744bd72
This forces `CMAKE_REQUIRED_FLAGS` to be treated as a string instead of list, so none of the args get dropped when passed through `check_c_source_compiles`. PiperOrigin-RevId: 886717366 Change-Id: I6314f9bfabd9d62bdcad5070c8801c453c381b79
65 lines
2.3 KiB
CMake
65 lines
2.3 KiB
CMake
# Copyright 2021 DeepMind Technologies Limited
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#
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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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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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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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include(CheckCSourceCompiles)
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# Gets the appropriate linker options for building MuJoCo, based on features available on the
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# linker.
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function(get_mujoco_extra_link_options OUTPUT_VAR)
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if(MSVC)
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set(EXTRA_LINK_OPTIONS /OPT:REF /OPT:ICF=5 /STACK:16777216)
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else()
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set(EXTRA_LINK_OPTIONS)
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if(WIN32)
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set(CMAKE_REQUIRED_FLAGS "-fuse-ld=lld-link")
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check_c_source_compiles("int main() {}" SUPPORTS_LLD_LINK)
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if(SUPPORTS_LLD_LINK)
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set(EXTRA_LINK_OPTIONS ${EXTRA_LINK_OPTIONS} -fuse-ld=lld-link -Wl,/STACK:16777216 -Wl,/OPT:REF -Wl,/OPT:ICF)
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else()
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set(EXTRA_LINK_OPTIONS ${EXTRA_LINK_OPTIONS} -Wl,--stack,16777216)
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endif()
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else()
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set(CMAKE_REQUIRED_FLAGS "-fuse-ld=lld")
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check_c_source_compiles("int main() {}" SUPPORTS_LLD)
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if(SUPPORTS_LLD)
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set(EXTRA_LINK_OPTIONS ${EXTRA_LINK_OPTIONS} -fuse-ld=lld)
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else()
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set(CMAKE_REQUIRED_FLAGS "-fuse-ld=gold")
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check_c_source_compiles("int main() {}" SUPPORTS_GOLD)
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if(SUPPORTS_GOLD)
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set(EXTRA_LINK_OPTIONS ${EXTRA_LINK_OPTIONS} -fuse-ld=gold)
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endif()
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endif()
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set(CMAKE_REQUIRED_FLAGS "${EXTRA_LINK_OPTIONS} -Wl,--gc-sections")
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check_c_source_compiles("int main() {}" SUPPORTS_GC_SECTIONS)
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if(SUPPORTS_GC_SECTIONS)
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set(EXTRA_LINK_OPTIONS ${EXTRA_LINK_OPTIONS} -Wl,--gc-sections)
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else()
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set(CMAKE_REQUIRED_FLAGS "${EXTRA_LINK_OPTIONS} -Wl,-dead_strip")
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check_c_source_compiles("int main() {}" SUPPORTS_DEAD_STRIP)
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if(SUPPORTS_DEAD_STRIP)
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set(EXTRA_LINK_OPTIONS ${EXTRA_LINK_OPTIONS} -Wl,-dead_strip)
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endif()
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endif()
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endif()
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endif()
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set("${OUTPUT_VAR}"
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${EXTRA_LINK_OPTIONS}
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PARENT_SCOPE
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)
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endfunction()
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