STR #3514

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STR #3514

Application:FLTK Library
Status:5 - New
Priority:4 - High, e.g. key functionality not working
Scope:2 - Specific to an operating system
Subsystem:Build Files
Summary:Bundled image libs on Linux are incompatible with Xft
Version:1.4-current
Created By:AlbrechtS
Assigned To:AlbrechtS
Fix Version:Unassigned
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Name/Time/Date Text top right image
 
#1 AlbrechtS
03:00 Feb 28, 2019
Under Linux it is not possible to build any application with the bundled image libs with Xft because libXft.so is linked to a shared version of libpng and indirectly to libz.

From my Ubuntu 18.04 system (edited to remove unnecessary details):

$ ldd /usr/lib/x86_64-linux-gnu/libXft.so.2 | egrep 'jpeg|png|libz'
    libpng16.so.16 => /usr/lib/x86_64-linux-gnu/libpng16.so.16 (0x00..)
    libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00..)

One possible solution would be to disable --enable-localpng and --enable-localzlib configure switches and corresponding CMake options if FLTK is configured to use Xft (which is the default).
 
 
#2 AlbrechtS
03:04 Feb 28, 2019
For further information see the thread "Fl_Native_File_Chooser() crash with FLTK 1.4" in fltk.general:
https://groups.google.com/d/msg/fltkgeneral/zYbxVV7IOY0/v1A0dVJABQAJ

and particularly Manolo's reply:
"OK. I can replicate what you report under Ubuntu with test/native-filechooser."
https://groups.google.com/d/msg/fltkgeneral/zYbxVV7IOY0/WiOJ-pYoBgAJ

and follow-up's.
 
 
#3 djcj
12:00 Feb 28, 2019
Giving at least a warning in such a case would be nice.  
 
#4 AlbrechtS
02:25 Mar 03, 2019
Sure, that's the intention.  
bottom left image   bottom right image

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