Error compliation on Ubuntu 20.10 x64

[osfrance]

Hi all,

For informations, I've tried to build Jamulus on Ubuntu 20.10 x64, but I'd a problem with libGL, I solved it with a symbolic link (see below)

When I try to build latest Jamulus on Ubuntu 20.10 x64, i've this error message : /usr/bin/ld: cannot find -lGL

Install Ubuntu 20.10 x64 and try to compile Jamulus

I've launched :
sudo apt-get install build-essential qt5-qmake qtdeclarative5-dev qt5-default qttools5-dev-tools libjack-jackd2-dev
qmake Jamulus.pro
make clean
make

Ubuntu 20.10 x64

Jamulus Release 3.8.0rc1

I've solved the problem with installing :
sudo apt-get install libgl1-mesa-dev
sudo ln -s /usr/lib/x86_64-linux-gnu/libGL.so.1 /usr/lib/x86_64-linux-gnu/libGL.so
sudo ldconfig

[hoffie]

Thanks for the report. I'm struggling to understand how this can happen.

• Did this occur with previous Jamulus releases as well?
• Could it be that you have an additional Qt installation on your machine which may behave differently than Ubunut's? (Not sure what to check exactly, but which qmake, a look at Makefile and env | grep -i qt may help)
• Can you share the exact compiler output (some lines before and after the error should be sufficient)?

I don't think we are linking against libGL explicitly, so this would rather be a default Qt thing. I don't have Ubuntu in this version around, but I might try in a chroot if time permits.

[hoffie]

Looks like it may be related to proprietary OpenGL drivers?
https://forum.qt.io/topic/100987/cannot-find-lgl-error/15 (although it is about earlier Ubuntu versions)

[osfrance]

Hi @hoffie, yes I use Nvidia proprietary drivers ...
It's the first time I used jamulus, I use QMake version 3.1, Using Qt version 5.14.2 in /usr/lib/x86_64-linux-gnu
I've just in my env : QT_ACCESSIBILITY=1 and QT_QPA_PLATFORMTHEME=gtk2

This is the output of the compilation error :
g++ -Wl,--as-needed -Wl,-O1 -o Jamulus x86cpu.o x86_celt_map.o pitch_sse.o pitch_sse2.o vq_sse2.o celt_lpc_sse4_1.o pitch_sse4_1.o NSQ_sse4_1.o NSQ_del_dec_sse4_1.o x86_silk_map.o VAD_sse4_1.o VQ_WMat_EC_sse4_1.o sound.o buffer.o channel.o client.o main.o protocol.o jamcontroller.o server.o serverlist.o serverlogging.o settings.o signalhandler.o socket.o soundbase.o util.o jamrecorder.o creaperproject.o cwavestream.o audiomixerboard.o chatdlg.o clientsettingsdlg.o connectdlg.o clientdlg.o serverdlg.o multicolorled.o levelmeter.o analyzerconsole.o bands.o celt.o celt_decoder.o celt_encoder.o celt_lpc.o cwrs.o entcode.o entdec.o entenc.o kiss_fft.o laplace.o mathops.o mdct.o modes.o pitch.o quant_bands.o rate.o vq.o A2NLSF.o ana_filt_bank_1.o biquad_alt.o bwexpander.o bwexpander_32.o check_control_input.o CNG.o code_signs.o control_audio_bandwidth.o control_codec.o control_SNR.o debug.o decoder_set_fs.o decode_core.o decode_frame.o decode_indices.o decode_parameters.o decode_pitch.o decode_pulses.o dec_API.o encode_indices.o encode_pulses.o enc_API.o apply_sine_window_FLP.o autocorrelation_FLP.o burg_modified_FLP.o bwexpander_FLP.o corrMatrix_FLP.o encode_frame_FLP.o energy_FLP.o find_LPC_FLP.o find_LTP_FLP.o find_pitch_lags_FLP.o find_pred_coefs_FLP.o inner_product_FLP.o k2a_FLP.o LPC_analysis_filter_FLP.o LTP_analysis_filter_FLP.o LTP_scale_ctrl_FLP.o noise_shape_analysis_FLP.o pitch_analysis_core_FLP.o process_gains_FLP.o residual_energy_FLP.o scale_copy_vector_FLP.o scale_vector_FLP.o schur_FLP.o sort_FLP.o warped_autocorrelation_FLP.o wrappers_FLP.o gain_quant.o HP_variable_cutoff.o init_decoder.o init_encoder.o inner_prod_aligned.o interpolate.o lin2log.o log2lin.o LPC_analysis_filter.o LPC_fit.o LPC_inv_pred_gain.o LP_variable_cutoff.o NLSF2A.o NLSF_decode.o NLSF_del_dec_quant.o NLSF_encode.o NLSF_stabilize.o NLSF_unpack.o NLSF_VQ.o NLSF_VQ_weights_laroia.o NSQ.o NSQ_del_dec.o pitch_est_tables.o PLC.o process_NLSFs.o quant_LTP_gains.o resampler.o resampler_down2.o resampler_down2_3.o resampler_private_AR2.o resampler_private_down_FIR.o resampler_private_IIR_FIR.o resampler_private_up2_HQ.o resampler_rom.o shell_coder.o sigm_Q15.o sort.o stereo_decode_pred.o stereo_encode_pred.o stereo_find_predictor.o stereo_LR_to_MS.o stereo_MS_to_LR.o stereo_quant_pred.o sum_sqr_shift.o tables_gain.o tables_LTP.o tables_NLSF_CB_NB_MB.o tables_NLSF_CB_WB.o tables_other.o tables_pitch_lag.o tables_pulses_per_block.o table_LSF_cos.o VAD.o VQ_WMat_EC.o analysis.o mlp.o mlp_data.o opus.o opus_decoder.o opus_encoder.o repacketizer.o qrc_resources.o moc_sound.o moc_channel.o moc_client.o moc_protocol.o moc_jamcontroller.o moc_server.o moc_serverlist.o moc_settings.o moc_socket.o moc_soundbase.o moc_testbench.o moc_util.o moc_jamrecorder.o moc_creaperproject.o moc_signalhandler.o moc_audiomixerboard.o moc_chatdlg.o moc_clientsettingsdlg.o moc_connectdlg.o moc_clientdlg.o moc_serverdlg.o moc_levelmeter.o moc_analyzerconsole.o moc_multicolorled.o -ljack -lpthread /usr/lib/x86_64-linux-gnu/libQt5Widgets.so /usr/lib/x86_64-linux-gnu/libQt5Gui.so /usr/lib/x86_64-linux-gnu/libQt5Network.so /usr/lib/x86_64-linux-gnu/libQt5Xml.so /usr/lib/x86_64-linux-gnu/libQt5Concurrent.so /usr/lib/x86_64-linux-gnu/libQt5Core.so -lGL
/usr/bin/ld : ne peut trouver -lGL
collect2: error: ld returned 1 exit status
make: *** [Makefile:1135 : Jamulus] Erreur 1

[ghost]

Have you installed the software development packages for these proprietary drivers, and read the documentation? (maybe Qt and more needs to be compiled with the proprietary drivers)
If all you have is the proprietary drivers (no header files and environment variables), then you can expect linking problems.
Put a note in your Linux notebook when you make a symlink because it may break something else later.

[gilgongo]

Please also note that as of the upcoming 3.8.0 release, we are saying that preferred method of supporting Ubuntu (and other platforms) is to use the binaries generated by the autobuild process in the Jamulus repository.

I'll move this to a discussion until/unless a reproducible bug is found.