0,0 → 1,123 |
Due to our use of `libtool' to generate and install the FreeType 2 |
libraries on Unix systems, as well as other historical events, it is |
generally very difficult to know precisely which release of the font |
engine is installed on a given system. |
|
This file tries to explain why and to document ways to properly detect |
FreeType 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 2.3.1 or 2.4.10. |
|
* The libtool (and Unix) specific version number, like 13.0.7. 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.6.7.1'. |
|
The platform-specific number is, unsurprisingly, platform-specific and |
varies with the operating system you are using (several variants of |
Linux, FreeBSD, Solaris, etc.). You should thus _never_ use it, even |
for simple tests. |
|
The libtool-specific number does not equal the release number but is |
tied to it. |
|
The release number is available at *compile* time through the following |
macros defined in FT_FREETYPE_H: |
|
- FREETYPE_MAJOR: major release number |
- FREETYPE_MINOR: minor release number |
- FREETYPE_PATCH: patch release number |
|
See below for a small autoconf fragment. |
|
The release number is also available at *runtime* through the |
`FT_Library_Version' API. |
|
|
2. History |
---------- |
|
The following table gives, for all releases since 2.3.0, the |
corresponding libtool number, as well as the shared object number found |
on _most_ systems, but not all of them: |
|
|
release libtool so |
------------------------------- |
2.5.0 16.2.10 6.10.2 |
2.4.12 16.1.10 6.10.1 |
2.4.11 16.0.10 6.10.0 |
2.4.10 15.0.9 6.9.0 |
2.4.9 14.1.8 6.8.1 |
2.4.8 14.0.8 6.8.0 |
2.4.7 13.2.7 6.7.2 |
2.4.6 13.1.7 6.7.1 |
2.4.5 13.0.7 6.7.0 |
2.4.4 12.2.6 6.6.2 |
2.4.3 12.1.6 6.6.1 |
2.4.2 12.0.6 6.6.0 |
2.4.1 11.1.5 6.5.1 |
2.4.0 11.0.5 6.5.0 |
2.3.12 10.0.4 6.4.0 |
2.3.11 9.22.3 6.3.22 |
2.3.10 9.21.3 6.3.21 |
2.3.9 9.20.3 6.3.20 |
2.3.8 9.19.3 6.3.19 |
2.3.7 9.18.3 6.3.18 |
2.3.6 9.17.3 6.3.17 |
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 |
|
|
3. Autoconf Code Fragment |
------------------------- |
|
Lars Clausen contributed the following autoconf fragment to detect which |
version of FreeType is installed on a system. This one tests for a |
version that is at least 2.0.9; you should change it to check against |
other 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 2002-2013 by |
David 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 project |
license, LICENSE.TXT. By continuing to use, modify, or distribute this |
file you indicate that you have read the license and understand and |
accept it fully. |
|
|
--- end of VERSION.DLL --- |