Error libicuuc.so.70

on Fedora 43 KDE

Grakino said:

Fedora 43 KDE. I’ve go an error for 3DCoat 2026.01:

• error while loading shared libraries: libicuuc.so.70: cannot open shared object file: No such file or director

I managed to fix this problem. I downloaded the necessary library from pkgs.org and installed all the libraries in LinuxLibs. It worked, and the program is working now.

But there is one thing that bothers me.
According to pkgs.org, Libicu70 is only available for Ubuntu 22.04 LTS.
I am afraid that owners of the current 24.04.4 LTS may encounter this problem.

On Manjaro XFCE

Lazyghould said:

Same thing on Manjaro XFCE. Did the same, installed the libraries in Linuxlibs folder. Although my Linux knowledge is extremely limited, maybe someone will find something useful from the steps I took:
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1. Install basic build tools (one time). Run these commands in a terminal:
sudo pacman -S –needed base-devel gcc make pkgconf
2.Create a working directory and download the archive:
cd ~/Software
mkdir -p icu70-src
cd icu70-src
wget https://github.com/unicode-org/icu/releases/download/release-70-1/icu4c-70_1-src.tgz

3.Unpack it:
tar xf icu4c-70_1-src.tgz
cd icu/source

4.Configure ICU to install under your home. Install it under ~/Software/icu70-local so it doesn’t touch system /usr:
mkdir -p ~/Software/icu70-local
./configure –prefix=$HOME/Software/icu70-local

5.Build and install ICU 70 locally.This may take a few minutes:
make -j$(nproc)
make install

6. After this, the libraries will be under:
ls $HOME/Software/icu70-local/lib
You should see files like:
libicuuc.so.70
libicui18n.so.70
libicudata.so.70
    (and a few others)

7.Copy required ICU 70 libs into LinuxLibs:
cd ~/Software/3DCoat-2026.01

cp ~/Software/icu70-local/lib/libicuuc.so.70* LinuxLibs/
cp ~/Software/icu70-local/lib/libicui18n.so.70* LinuxLibs/
cp ~/Software/icu70-local/lib/libicudata.so.70* LinuxLibs/

Because LD_LIBRARY_PATH already points to LinuxLibs first, 3DCoat should now find libicuuc.so.70 and continue starting.

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