could it be a missing package or something ?
/usr/bin/ld: main.o: in function `main':
main.cpp:(.text.startup+0x1ce8): undefined reference to `HighResolution::init()'
/usr/bin/ld: main.cpp:(.text.startup+0x1d7d): undefined reference to `HighResolution::init(HighResolution::HiResolutionMode)'
/usr/bin/ld: main.cpp:(.text.startup+0x1d8e): undefined reference to `HighResolution::init(HighResolution::HiResolutionMode)'
/usr/bin/ld: main.cpp:(.text.startup+0x1d99): undefined reference to `HighResolution::isEnabled()'
/usr/bin/ld: main.cpp:(.text.startup+0x2259): undefined reference to `HighResolution::display(bool)'
/usr/bin/ld: mainwindow.o: in function `MainWindow::CloseProfile()':
mainwindow.cpp:(.text+0x109d): undefined reference to `CheckUpdates::showMessage()'
/usr/bin/ld: mainwindow.o: in function `MainWindow::CheckForUpdates(bool)':
mainwindow.cpp:(.text+0x14dd): undefined reference to `CheckUpdates::CheckUpdates(QWidget*)'
/usr/bin/ld: mainwindow.o: in function `MainWindow::OpenProfile(QString, bool)':
mainwindow.cpp:(.text+0xb16a): undefined reference to `CheckUpdates::showMessage()'
/usr/bin/ld: mainwindow.o: in function `MainWindow::CheckForUpdates(bool)':
mainwindow.cpp:(.text+0x14f7): undefined reference to `CheckUpdates::checkForUpdates(bool)'
/usr/bin/ld: preferencesdialog.o: in function `PreferencesDialog::Save()':
preferencesdialog.cpp:(.text+0x350e): undefined reference to `HighResolution::checkBox(bool, QCheckBox*)'
/usr/bin/ld: preferencesdialog.o: in function `PreferencesDialog::PreferencesDialog(QWidget*, Profile*)':
preferencesdialog.cpp:(.text+0xae66): undefined reference to `HighResolution::checkBox(bool, QCheckBox*)'
/usr/bin/ld: prs1_loader.o: in function `PRDS2File::initializeKey()':
prs1_loader.cpp:(.text+0xedf): undefined reference to `decrypt_aes256(QByteArray const&, QByteArray const&, QByteArray&)'
/usr/bin/ld: prs1_loader.cpp:(.text+0xf0f): undefined reference to `pbkdf2_sha256(QByteArray const&, QByteArray const&, int, QByteArray&)'
/usr/bin/ld: prs1_loader.cpp:(.text+0xf2f): undefined reference to `decrypt_aes256_gcm(QByteArray const&, QByteArray const&, QByteArray const&, QByteArray const&, QByteArray&)'
/usr/bin/ld: prs1_loader.o: in function `PRDS2File::decryptData()':
prs1_loader.cpp:(.text+0x11367): undefined reference to `decrypt_aes256_gcm(QByteArray const&, QByteArray const&, QByteArray const&, QByteArray const&, QByteArray&)'
/usr/bin/ld: prs1_loader.cpp:(.text+0x11542): undefined reference to `encrypt_aes256_gcm(QByteArray const&, QByteArray const&, QByteArray const&, QByteArray&, QByteArray&)'
/usr/bin/ld: moc_checkupdates.o: in function `CheckUpdates::qt_metacall(QMetaObject::Call, int, void**)':
moc_checkupdates.cpp:(.text+0xe7): undefined reference to `CheckUpdates::replyFinished(QNetworkReply*)'
/usr/bin/ld: moc_checkupdates.o: in function `CheckUpdates::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)':
moc_checkupdates.cpp:(.text+0x30): undefined reference to `CheckUpdates::replyFinished(QNetworkReply*)'
/usr/bin/ld: moc_checkupdates.o:(.data.rel.ro._ZTV12CheckUpdates[_ZTV12CheckUpdates]+0x28): undefined reference to `CheckUpdates::~CheckUpdates()'
/usr/bin/ld: moc_checkupdates.o:(.data.rel.ro._ZTV12CheckUpdates[_ZTV12CheckUpdates]+0x30): undefined reference to `CheckUpdates::~CheckUpdates()'
/usr/bin/ld: moc_checkupdates.o:(.data.rel.ro._ZTV12CheckUpdates[_ZTV12CheckUpdates]+0x1c8): undefined reference to `non-virtual thunk to CheckUpdates::~CheckUpdates()'
/usr/bin/ld: moc_checkupdates.o:(.data.rel.ro._ZTV12CheckUpdates[_ZTV12CheckUpdates]+0x1d0): undefined reference to `non-virtual thunk to CheckUpdates::~CheckUpdates()'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:586: OSCAR] Error 1
make[1]: Leaving directory '/home/user/OSCAR/build/oscar'
make: *** [Makefile:47: sub-oscar-make_first-ordered] Error 2