/usr/share/doc/libplplot11/examples/cmake/ is in libplplot-dev 5.9.9-2ubuntu2.
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/usr/share/doc/libplplot11/examples/cmake/modules/
/usr/share/doc/libplplot11/examples/cmake/modules/FindPkgConfig.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/export_plplot-noconfig.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/export_plplot.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/
/usr/share/doc/libplplot11/examples/cmake/modules/language_support.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeAdaCompiler.cmake.in
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeAdaInformation.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeDCompiler.cmake.in
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeDInformation.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeD_Copyright.txt
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeDetermineAdaCompiler.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeDetermineDCompiler.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeTestAdaCompiler.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/CMakeTestDCompiler.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/Platform/
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/Platform/Linux-dmd.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/Platform/Linux-gdc.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/Platform/Windows-dmd.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/language_support/cmake/Platform/Windows-gdc.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/pkg-config.cmake
/usr/share/doc/libplplot11/examples/cmake/modules/plplot_configure.cmake