12. February 2018

Incompatible library version: requires version 19.0.0 or later, but .dylib provides version 18.0.0

I was trying to compile simple test application with FreeType2 on macOS just by a command line. Application compiled without problem.

The application was not able to start and displayed following error:

Compilation of FreeType
dyld: Library not loaded: /usr/local/lib/libfreetype.6.dylib
  Referenced from: /Users/georgik/projects/freetype-2.6.5/./fttest
  Reason: Incompatible library version: fttest requires version 19.0.0 or later, but libfreetype.6.dylib provides version 18.0.0

There is one handy tool on macOS which helps in cases like this one: otool.

otool -L ./ft-test
  /usr/local/lib/libfreetype.6.dylib (compatibility version 19.0.0, current version 19.5.0)
  /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1238.0.0)
  /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 495.0.0

The problem was caused by two versions of libfreetype on the macOS. One library was stored in /usr/local/lib and the other was stored in my project directory.

How to fix the issue? There are two options:

  • Remove unwanted library which is causing ambiguity
  • Set proper paths to DYLD_LIBRARY_PATH before starting the application

26. November 2012

There is more to C and C++. Slides from talk at FI MUNI 2012

This year I had opportunity to speak at two courses at FI MUNI. Check out slides 🙂

There is more to C (PDF)

Libraries ant tools for C++ (PDF)

Source code of examples is at GitHub: github.com/georgik/fimuni-c-cpp-examples

29. August 2011

Managing LDAP with Apache Directory Studio

One of key downsides of LDAP in past was lack of cross-platform tools for managing directory structure.

Recently I found very good implementation of LDAP management tool based on Eclipse. It is Apache Directory Studio.

It is possible to connect it also to Microsoft Active Directory. Good work!