Rebuild Lazarus IDE on Linux fails when installing package

[Coxy]

Clean install of Lazarus IDE 2.0.10 on Linux Mint 20.1, Tools/Build Lazarus with Profile Normal IDE works. However if I install "lazopenglcontext 0.01" and "Save and Rebuild IDE" I get "Error: Error while linking".

Remove package and IDE Rebuild works!

This also happens with "Online Package Manager" when adding BGRABitmap and BGRAControls.

[Coxy]

Bit more info.

Used option Configure "Build Lazarus" and with profile "Clean Up + Build all". Bottom of log is

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1. (9022) Compiling resource /home/simon/.lazarus/units/x86_64-linux/gtk2/lazarus.or
2. (9015) Linking /home/simon/.lazarus/bin/lazarus
3. /usr/bin/ld: cannot find -lGL
4. /usr/share/lazarus/2.0.10/ide/lazarus.pp(165,1) Error: (9013) Error while linking
5. /usr/share/lazarus/2.0.10/ide/lazarus.pp(165,1) Fatal: (10026) There were 1 errors compiling module, stopping
6. Fatal: (1018) Compilation aborted
7. make[2]: *** [Makefile:4144: lazarus] Error 1
8. make[1]: *** [Makefile:4574: idepkg] Error 2
9. make: *** [Makefile:3605: idepkg] Error 2
10. Error: /usr/bin/ppcx64 returned an error exitcode
11. make[2]: Leaving directory '/usr/share/lazarus/2.0.10/ide'
12. make[1]: Leaving directory '/usr/share/lazarus/2.0.10/ide'
13. make: Leaving directory '/usr/share/lazarus/2.0.10'
14.  

This is when installing package "lazopenglcontext 0.01"

[Zvoni]

I remember having issues with BGRA, too.
If memory serves, it was an incompatibilty with another, already installed, package.

I'd try in a VM (VirtualBox) a vanilla install of Linux, and a vanilla install of Lazarus.
And then try to install the package as the first one

[af0815]

/usr/bin/ld: cannot find -lGL

The ld say, you have a needed library not on your system. It is missing libGL(-dev)

This is not a issue from OPM or something similar. If a package need a library, YOU must fullfill the requirements on your system and other systems where the software should run.

[Coxy]

/usr/bin/ld: cannot find -lGL

The ld say, you have a needed library not on your system. It is missing libGL(-dev)

This is not a issue from OPM or something similar. If a package need a library, YOU must fullfill the requirements on your system and other systems where the software should run.

Installed libgl-dev (libGL-dev fails) using,

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1. sudo apt-get install libgl-dev

Package "lazopenglcontext 0.0.1" now installs correctly and so do the BGRA ones.

Many thanks

[wp]

I have a similar issue with LazOpenGL in Ubuntu 20.10, qt5: "undefined reference to `QLCLOpenGLWidget_override_paintGL'". gtk2 installs fine, libgl-dev is installed. Any idea?

[Coxy]

I have a similar issue with LazOpenGL in Ubuntu 20.10, qt5: "undefined reference to `QLCLOpenGLWidget_override_paintGL'". gtk2 installs fine, libgl-dev is installed. Any idea?

Although Linux Mint is based on Ubuntu I have not come across this problem and am unable to suggest anything. Hopefully someone else will have a solution.

[devEric69]

I have a similar issue with LazOpenGL in Ubuntu 20.10, qt5: "undefined reference to `QLCLOpenGLWidget_override_paintGL'". gtk2 installs fine, libgl-dev is installed. Any idea?

Maybe, check your fpc.cfg file. Try to add inside something like...:

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-Fl/usr/local/lib
...or another path pointing towards the {gtk2} *.so installed libraries \ symlinks.
But this is a trick: normally, you have to configure such paths in the Linux loader!
See loading libraries under Linux , in https://wiki.freepascal.org/Lazarus/FPC_Libraries.

[Zvoni]

I have a similar issue with LazOpenGL in Ubuntu 20.10, qt5: "undefined reference to `QLCLOpenGLWidget_override_paintGL'". gtk2 installs fine, libgl-dev is installed. Any idea?

Sounds similiar:
https://forum.lazarus.freepascal.org/index.php?topic=54010.0