libQt5Core.so.5: cannot open shared object file

[RobertBaruch]

I've cloned and built nextpnr just now (cmake -DARCH=ice40 .) , and I'm running into the dreaded libQt5Core.so.5 not found. I have already installed qt-default:

lrwxrwxrwx 1 root root      20 Oct 30 04:47 /usr/lib/x86_64-linux-gnu/libQt5Core.so -> libQt5Core.so.5.11.3             
lrwxrwxrwx 1 root root      20 Oct 30 04:47 /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 -> libQt5Core.so.5.11.3           
lrwxrwxrwx 1 root root      20 Oct 30 04:47 /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.11 -> libQt5Core.so.5.11.3        
-rw-r--r-- 1 root root 5200168 Oct 30 04:47 /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.11.3

ldd on nextpnr-ice40 indeed shows things like:

libQt5Gui.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5 (0x00007ffbe7090000)
libicuuc.so.63 => /usr/lib/x86_64-linux-gnu/libicuuc.so.63 (0x00007f4bfa340000)
libQt5Core.so.5 => not found

And that's pretty weird, that it's found the other Qt libs, but not core.

I am not using Anaconda, so I'm pretty sure #292 is not applicable.

$ grep -i Qt CMakeCache.txt

//The directory containing a CMake configuration file for Qt5Core.
Qt5Core_DIR:PATH=/usr/lib/x86_64-linux-gnu/cmake/Qt5Core
//The directory containing a CMake configuration file for Qt5Gui.
Qt5Gui_DIR:PATH=/usr/lib/x86_64-linux-gnu/cmake/Qt5Gui
//The directory containing a CMake configuration file for Qt5OpenGL.
Qt5OpenGL_DIR:PATH=/usr/lib/x86_64-linux-gnu/cmake/Qt5OpenGL
//The directory containing a CMake configuration file for Qt5Widgets.
Qt5Widgets_DIR:PATH=/usr/lib/x86_64-linux-gnu/cmake/Qt5Widgets
//The directory containing a CMake configuration file for Qt5.
Qt5_DIR:PATH=/usr/lib/x86_64-linux-gnu/cmake/Qt5
QtPropertyBrowser_BINARY_DIR:STATIC=/home/robertbaruch/repos/nextpnr/generated/3rdparty/QtPropertyBrowser
QtPropertyBrowser_LIB_DEPENDS:STATIC=general;Qt5::Widgets;
QtPropertyBrowser_SOURCE_DIR:STATIC=/home/robertbaruch/repos/nextpnr/3rdparty/QtPropertyBrowser
gui_ice40_LIB_DEPENDS:STATIC=general;Qt5::Widgets;

Any ideas?

[daveshah1]

Just to check:

What is the full error when running nextpnr?
What is the full output of ldd -v nextpnr-ice40?
What distro is this?

[RobertBaruch]

It seems to have been a Windows Subsystem for Linux issue, when using Debian. Apparently this is a known issue.

Also see the bug in the WSL repo.

Long story short, you need to strip out the ELF section called .note.ABI-tag from libQt5Core.so.5:

sudo strip --remove-section=.note.ABI-tag /usr/lib/x86_64-linux-gnu/libQt5Core.so.5

[yousefcodes]

This saved me!

[DeflateAwning]

Note that the strip command can be installed on Ubuntu/Debian with sudo apt install binutils