The OpenGL Extension Wrangler Library (GLEW) is a cross-platform C/C++ extension loading library. GLEW provides efficient run-time mechanisms for determining which OpenGL extensions are supported on the target platform. OpenGL core and extension functionality is exposed in a single header file. GLEW is available for a variety of operating systems, including AIX, Windows, Linux, Mac OS X, FreeBSD, Irix, and Solaris.
The library is available as 32-bit and 64-bit:
Even older version