Linux dynamic library installation, ldconfig, .so file, application distribution

Problem

• Using ubuntu 19.04
• Local build cpp application
• Installed to /usr/local/yourLib
• Error message
• cannot open shared object file: No such file or directory

Structure

• /usr/local/yourLib/bin
• /usr/local/yourLib/lib
• /usr/local/yourLib/include

Solution

• Add path permanent

• sudo touch /etc/ld.so.conf.d/user.conf
  sudo echo "/usr/local/yourLib/lib" >> /etc/ld.so.conf.d/user.conf
  sudo ldconfig
  

• Add path temporary

• export LD_LIBRARY_PATH=/usr/local/yourLib/lib