Fix #2904: add MUJOCO_ENABLE_LTO option to make LTO configurable#3374
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Ashutosh0x wants to merge 1 commit into
Open
Fix #2904: add MUJOCO_ENABLE_LTO option to make LTO configurable#3374Ashutosh0x wants to merge 1 commit into
Ashutosh0x wants to merge 1 commit into
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Problem
CMAKE_INTERPROCEDURAL_OPTIMIZATIONwas set unconditionally for non-Debug builds wheneverDEFINEDwas not set. There was no user-facing CMake option to disable LTO without resorting to undocumented internal variable manipulation.An explicit
-DCMAKE_INTERPROCEDURAL_OPTIMIZATION=OFFcould also be silently overridden in certain CMake configurations, as discussed in the issue.Fixes #2904.
Changes
cmake/MujocoOptions.cmakeMUJOCO_ENABLE_LTOoption (defaultON) that gives users a clean, documented way to disable LTO:-DMUJOCO_ENABLE_LTO=OFF.CMAKE_INTERPROCEDURAL_OPTIMIZATIONlogic is preserved inside theif(MUJOCO_ENABLE_LTO)guard, so the default behaviour (LTO on for non-Debug, off for Debug) is unchanged.