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    • Benjamin Morgan's avatar
      Always build AtlasGeant4 OBJECT libs with LTO enabled · 070ee2e5
      Benjamin Morgan authored and Duc Ta's avatar Duc Ta committed
      Add CMake option to enable LTO for AtlasGeant4
      
      Use of LTO in Athena builds is not currently possible if the GCC checker
      plugins are in use. These are not yet LTO-aware, leading to build
      errors. Disabling these globally or per-LTO-using-package is not
      feasible as it could lead to the introduction of bad code.
      
      Whilst the plugins are made LTO-aware, introduce CMake option in Athena
      and AthSimulation for enabling LTO builds of the AtlasGeant4 "big"
      library. Set to OFF by default so that "normal" builds are unaffected.
      Builds wanting LTO can set the option to ON, but must also set
      ATLAS_USE_GCC_CHECKERS to OFF in this case.
      070ee2e5
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