CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_LD_FLAGS
    ECM_MKSPECS_INSTALL_DIR


/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/externalextractor.cpp: In constructor ‘KFileMetaData::ExternalExtractor::ExternalExtractor(const QString&)’:
/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/externalextractor.cpp:57:18: warning: ignoring return value of ‘virtual bool QFile::open(QIODeviceBase::OpenMode)’, declared with attribute ‘nodiscard’ [-Wunused-result]
   57 |     manifest.open(QIODevice::ReadOnly);
      |     ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/qt6/QtCore/qdir.h:11,
                 from /usr/include/qt6/QtCore/QDir:1,
                 from /var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/externalextractor.cpp:15:
/usr/include/qt6/QtCore/qfile.h:291:32: note: declared here
  291 |     QFILE_MAYBE_NODISCARD bool open(OpenMode flags) override;
      |                                ^~~~
/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/externalwriter.cpp: In constructor ‘KFileMetaData::ExternalWriter::ExternalWriter(const QString&)’:
/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/externalwriter.cpp:54:18: warning: ignoring return value of ‘virtual bool QFile::open(QIODeviceBase::OpenMode)’, declared with attribute ‘nodiscard’ [-Wunused-result]
   54 |     manifest.open(QIODevice::ReadOnly);
      |     ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/qt6/QtCore/qdir.h:11,
                 from /usr/include/qt6/QtCore/QDir:1,
                 from /var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/externalwriter.cpp:13:
/usr/include/qt6/QtCore/qfile.h:291:32: note: declared here
  291 |     QFILE_MAYBE_NODISCARD bool open(OpenMode flags) override;
      |                                ^~~~
/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/extractors/exiv2extractor.cpp: In lambda function:
/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/extractors/exiv2extractor.cpp:121:13: warning: captured structured bindings are a C++20 extension [-Wc++20-extensions]
  121 |         if (offsetTime) {
      |             ^~~~~~~~~~
/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/extractors/exiv2extractor.cpp:104:27: note: declared here
  104 |     const auto [dateTime, offsetTime, subSecTime] = [&data, getStringValue]() {
      |                           ^~~~~~~~~~
/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/extractors/appimageextractor.cpp: In constructor ‘DesktopFileParser::DesktopFileParser(const char*, const QString&)’:
/var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/extractors/appimageextractor.cpp:204:24: warning: ignoring return value of ‘bool QTemporaryFile::open()’, declared with attribute ‘nodiscard’ [-Wunused-result]
  204 |     tmpDesktopFile.open();
      |     ~~~~~~~~~~~~~~~~~~~^~
In file included from /usr/include/qt6/QtCore/QTemporaryFile:1,
                 from /var/pisi/kfilemetadata-6.21.0-82/work/kfilemetadata-6.21.0/src/extractors/appimageextractor.cpp:14:
/usr/include/qt6/QtCore/qtemporaryfile.h:52:32: note: declared here
   52 |     QFILE_MAYBE_NODISCARD bool open() { return open(QIODevice::ReadWrite); }
      |                                ^~~~