Vlc-Qt Static Build

jidaprano

Hello,
I am trying to statically build a Qt program that uses Vlc-Qt. I statically compiled Vlc-Qt with the -DSTATIC=ON compiler flag, and it successfully builds with the following output:

-- Building VLC-Qt 1.2.0
-- Git revision: 9b2f561
-- The C compiler identification is GNU 11.4.0
-- The CXX compiler identification is GNU 11.4.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Build statically: ON
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Using Qt 5.15.14
-- Installing to system QML import path: OFF
-- Found LibVLC include-dir path: /usr/include
-- Found LibVLC library path:/usr/lib/x86_64-linux-gnu/libvlc.so
-- Found LibVLCcore library path:/usr/lib/x86_64-linux-gnu/libvlccore.so
-- Configuring done
-- Generating done
-- Build files have been written to: /home/exhibits/vlc-qt/build

Unfortunately, after I make and install Vlc-Qt, when I try to run the Qt project that uses it, I get the following errors:

Instance.cpp👎 error: undefined reference to libvlc_new' :-1: error: Instance.cpp:(.text+0x4e3): undefined reference to libvlc_log_set'

and a series of similar ones. Am I incorrectly linking libvlc to Vlc-qt?
I'm aware this is probably not the optimal place to ask Vlc-Qt questions but all original vlc-qt forums are pretty dead, so I'd appreciate any guidance.
Thanks

SGaist

Hi and welcome to devnet,

You forgot to link against VLC lib itself. The fact that VLC-Qt is static does not make its dependencies static as well.

jidaprano

@SGaist
Thanks for responding, your posts have helped me immensely over the past few months.
How would I go about statically linking with libvlc itself? Do I need to statically build vlc?

SGaist

Yes, if you want a library to be 100% static, then all its dependencies shall also be built statically.