Due  to our  use of  `libtool' to  generate and  install the  FreeType 2libraries on  Unix systems,  as well as  other historical events,  it isgenerally very  difficult to  know precisely which  release of  the fontengine is installed on a given system.This file tries  to explain why and to document  ways to properly detectFreeType on Unix.1. Version and Release numbers------------------------------For each new  public release of FreeType 2,  there are generally *three*distinct `version' numbers to consider:  * The official FreeType 2 release number, like 2.0.9 or 2.1.3.  * The libtool (and Unix) specific version number, like 9.2.3.  This is    what `freetype-config --version' returns.  * The platform-specific  shared object  number, used for  example when    the library is installed as `/usr/lib/libfreetype.so.6.3.2'.The platform-specific  number is, unsurprisingly,  platform-specific andvaries  with the  operating system  you are  using (several  variants ofLinux, FreeBSD,  Solaris, etc.).  You  should thus _never_ use  it, evenfor simple tests.The libtool-specific  number does  not equal the  release number  but istied to it.The release number is available  at *compile* time through the followingmacros defined in FT_FREETYPE_H:  - FREETYPE_MAJOR: major release number  - FREETYPE_MINOR: minor release number  - FREETYPE_PATCH: patch release numberSee below for a small autoconf fragment.The  release   number  is  also  available  at   *runtime*  through  the`FT_Library_Version' API.   Unfortunately, this one  wasn't available orworking correctly before the 2.1.3 official release.2. History----------The following table gives,  for each official release, the correspondinglibtool  number, as well  as the  shared object  number found  on _most_systems, but not all of them:    release    libtool      so  -------------------------------     2.3.5      9.16.3    6.3.16     2.3.4      9.15.3    6.3.15     2.3.3      9.14.3    6.3.14     2.3.2      9.13.3    6.3.13     2.3.1      9.12.3    6.3.12     2.3.0      9.11.3    6.3.11     2.2.1      9.10.3    6.3.10     2.2.0      9.9.3     6.3.9     2.1.10     9.8.3     6.3.8     2.1.9      9.7.3     6.3.7     2.1.8      9.6.3     6.3.6     2.1.7      9.5.3     6.3.5     2.1.6      9.5.3     6.3.5     2.1.5      9.4.3     6.3.4     2.1.4      9.3.3     6.3.3     2.1.3      9.2.3     6.3.2     2.1.2      9.1.3     6.3.1     2.1.1      9.0.3         ?     2.1.0      8.0.2         ?     2.0.9      9.0.3         ?     2.0.8      8.0.2         ?     2.0.4      7.0.1         ?     2.0.1      6.1.0         ?The libtool numbers are a bit inconsistent due to the library's history:  - 2.1.0 was created as a development branch from 2.0.8 (hence the same    libtool numbers).  - 2.0.9  was  a  bug-fix  release  of  the  `stable'  branch,  and  we    incorrectly increased its libtool number.  - 2.1.4 was a development version, however it was stable  enough to be    the basis of the 2.2.0 release.3. Autoconf Code Fragment-------------------------Lars Clausen contributed the following autoconf fragment to detect whichversion of  FreeType is  installed on  a system.  This  one tests  for aversion that  is at least 2.0.9;  you should change it  to check againstother release numbers.  AC_MSG_CHECKING([whether FreeType version is 2.0.9 or higher])  old_CPPFLAGS="$CPPFLAGS"  CPPFLAGS=`freetype-config --cflags`  AC_TRY_CPP([#include <ft2build.h>#include FT_FREETYPE_H#if (FREETYPE_MAJOR*1000 + FREETYPE_MINOR)*1000 + FREETYPE_PATCH < 2000009#error Freetype version too low.#endif  ],  [AC_MSG_RESULT(yes)   FREETYPE_LIBS=`freetype-config --libs`   AC_SUBST(FREETYPE_LIBS)   AC_DEFINE(HAVE_FREETYPE,1,[Define if you have the FreeType2 library])   CPPFLAGS="$old_CPPFLAGS"],  [AC_MSG_ERROR([Need FreeType library version 2.0.9 or higher])])------------------------------------------------------------------------Copyright 2002, 2003, 2004, 2005, 2006, 2007 byDavid Turner, Robert Wilhelm, and Werner Lemberg.This  file is  part  of the  FreeType  project, and  may  only be  used,modified,  and  distributed under  the  terms  of  the FreeType  projectlicense, LICENSE.TXT.  By continuing  to use, modify, or distribute thisfile  you indicate that  you have  read the  license and  understand andaccept it fully.--- end of VERSION.DLL ---