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CMake uninstall target conflicts with other previously registered uninstall targets #128

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bear24rw opened this issue Jan 27, 2023 · 0 comments · May be fixed by #141
Open

CMake uninstall target conflicts with other previously registered uninstall targets #128

bear24rw opened this issue Jan 27, 2023 · 0 comments · May be fixed by #141

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@bear24rw
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I am trying to build netcdf-c & netcdf-cxx4 within a cmake project via FetchContent. Both netcdf-c and netcdf-cxx4 register an uninstall which violates CMP0002 and causes cmake to fail with this error:

CMake Error at build/_deps/netcdf-cxx4-src/CMakeInstallation.cmake:109 (ADD_CUSTOM_TARGET):
  ADD_CUSTOM_TARGET cannot create target "uninstall" because another target
  with the same name already exists.  The existing target is a custom target
  created in source directory
  "build/_deps/netcdf-c-src".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  build/_deps/netcdf-cxx4-src/CMakeLists.txt:688 (INCLUDE)

Other projects have solved this issue by wrapping the custom target in an option() so that users can disable the target.

This is the same issue as Unidata/netcdf-c#2597
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CMake: Don't add uninstall target and CPack config if not top-level ZedThree/netcdf-cxx4
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@bear24rw