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Details

Type: Bug
Resolution: Fixed
Priority: P2: Important
Fix Version/s: 6.5.6, 6.7.1, 6.8.0 FF
Affects Version/s: 6.5.0
Component/s: Build System: CMake, Image formats
Labels:
None

Commits:
34282d8ce (dev), 6a28e2066 (6.7), 8227b7a04 (tqtc/lts-6.5)

Description

i'm using statically linked qt and get the following duplicate symbol:

[2023-05-03T03:47:05.488Z] duplicate symbol 'NI_6_5_0::QIIOFHelper::initRead()' in:
[2023-05-03T03:47:05.488Z]     /Volumes/build/NIBuild/3rdparty/Qt/Qt-6.5.0-macx-clang-static/./plugins/imageformats/libqmacheif.a(qiiofhelpers.cpp.o)
[2023-05-03T03:47:05.488Z]     /Volumes/build/NIBuild/3rdparty/Qt/Qt-6.5.0-macx-clang-static/./plugins/imageformats/libqmacjp2.a(qiiofhelpers.cpp.o)

qiiofhelpers.cpp is directly compiled into both plugins, which works for dynamic linking, but is problematic when using static linking, as downstream code may use `-all_load` or the like to force all static library members to be loaded (unity builds may similar troubles)