COMP: Set CMAKE VISIBILITY_PRESET to hidden #636
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Suggested by Bradley Lowekamp at "WIP: Support adding Elastix component by CMake SimpleITK_USE_ELASTIX=ON" comment SimpleITK/SimpleITK#1611 (comment) referring to https://github.com/SimpleITK/SimpleITK/blob/2681d0689a5922a7f2d1b56b1c7b62361eed9d8d/SuperBuild/External_ITK.cmake#L81-L83 Discussed with Marius Staring at superelastix.slack.com #elastix Aims to avoid link warnings in SimpleITK (+ Elastix component), like > ld: warning: direct access in function '...' from file '....cxx.o)' to global weak symbol 'typeinfo for ...' from file '....cxx.o' means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings. At at https://open.cdash.org/viewBuildError.php?type=1&buildid=7827932 ( Azure Pipelines 2-macOS)
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I would recommend the following logic elastix: I'm not sure how Elasix build ITK, but the following logic SimpleITK uses to build ITK: These cmake visibility options should be consistent when building ITK and libraries which use ITK. SimpleITK defaults to building static libraries in the super build where using the hidden options makes since. When building shared libraries it can be best to disable this hidden visibility. There are cases where both options makes sense, so it should be options available to the advance developer building the application. |
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Suggested by Bradley Lowekamp (@blowekamp) at "WIP: Support adding Elastix component by CMake SimpleITK_USE_ELASTIX=ON" comment SimpleITK/SimpleITK#1611 (comment) referring to https://github.com/SimpleITK/SimpleITK/blob/2681d0689a5922a7f2d1b56b1c7b62361eed9d8d/SuperBuild/External_ITK.cmake#L81-L83
Discussed with Marius Staring (@mstaring) at superelastix.slack.com #elastix
Aims to avoid link warnings in SimpleITK (+ Elastix component), like
At at https://open.cdash.org/viewBuildError.php?type=1&buildid=7827932 ( Azure Pipelines 2-macOS)