root@FriendlyARM:/opt/armapp# ./armapp

QML debugging is enabled. Only use this in a safe environment.

main()

app(argc, argv)

 QObject::connect()

./armapp: symbol lookup error: /opt/Qt5.12.4_ARM_Linux/lib/XXXXXXXXXXXXXXX.5: undefined symbol: FT_Get_Font_Format

root@FriendlyARM:/opt/armapp# XXXXXXXXXXXXXXX.5: undefined symbol: FT_Get_Font_Format

XXXXXXXXXXXXXXX.5:: command not found

root@FriendlyARM:/opt/armapp#

root@FriendlyARM:/opt/armapp# apt-cache search libfreetype

libfreetype6 - FreeType 2 font engine, shared library files

libfreetype6-dev - FreeType 2 font engine, development files

libgd-perl - Perl module wrapper for libgd

libcoin80v5 - high-level 3D graphics kit implementing the Open Inventor API

root@FriendlyARM:/opt/armapp# apt-get install libfreetype6

XXXXXXXXXXXXXXXXXXXXXXXXX/questions/56039011/how-to-solve-a-symbol-look-up-error-on-qt-installation-on-ubuntu