131 lines
4.0 KiB
Plaintext
131 lines
4.0 KiB
Plaintext
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 2.7.0 or 2.10.2.
|
|
|
|
* The libtool (and Unix) specific version number, like 23.2.17.
|
|
This is what
|
|
|
|
pkg-config freetype2 --modversion
|
|
|
|
or
|
|
|
|
freetype-config --version
|
|
|
|
returns.
|
|
|
|
* The platform-specific shared object number, used for example when
|
|
the library is installed as `/usr/lib/libfreetype.so.6.17.2'.
|
|
|
|
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 `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 2.5.0, the
|
|
corresponding libtool number, as well as the shared object number
|
|
found on _most_ systems, but not all of them:
|
|
|
|
|
|
release libtool so
|
|
-------------------------------
|
|
2.10.4 23.4.17 6.17.4
|
|
2.10.3 23.3.17 6.17.3
|
|
2.10.2 23.2.17 6.17.2
|
|
2.10.1 23.1.17 6.17.1
|
|
2.10.0 23.0.17 6.17.0
|
|
2.9.1 22.1.16 6.16.1
|
|
2.9.0 22.0.16 6.16.0
|
|
2.8.1 21.0.15 6.15.0
|
|
2.8.0 20.0.14 6.14.0
|
|
2.7.1 19.0.13 6.13.0
|
|
2.7.0 18.6.12 6.12.6
|
|
2.6.5 18.5.12 6.12.5
|
|
2.6.4 18.4.12 6.12.4
|
|
2.6.3 18.3.12 6.12.3
|
|
2.6.2 18.2.12 6.12.2
|
|
2.6.1 18.1.12 6.12.1
|
|
2.6.0 18.0.12 6.12.0
|
|
2.5.5 17.4.11 6.11.4
|
|
2.5.4 17.3.11 6.11.3
|
|
2.5.3 17.2.11 6.11.2
|
|
2.5.2 17.1.11 6.11.1
|
|
2.5.1 17.0.11 6.11.0
|
|
2.5.0 16.2.10 6.10.2
|
|
|
|
|
|
3. Autoconf Code Fragment
|
|
-------------------------
|
|
|
|
Lars Clausen contributed the following autoconf fragment to check
|
|
which version of FreeType is installed on a system (now updated to use
|
|
`pkg-config' instead of `freetype-config'). This one tests for a
|
|
version that is at least 2.10.2; you should change it to check against
|
|
other release numbers.
|
|
|
|
|
|
AC_MSG_CHECKING([whether FreeType version is 2.10.2 or higher])
|
|
old_CPPFLAGS="$CPPFLAGS"
|
|
CPPFLAGS=`pkg-config freetype2 --cflags`
|
|
AC_TRY_CPP([
|
|
|
|
#include <ft2build.h>
|
|
#include <freetype/freetype.h>
|
|
|
|
#if FREETYPE_MAJOR*10000 + FREETYPE_MINOR*100 + FREETYPE_PATCH < 21002
|
|
# error FreeType version too low.
|
|
#endif
|
|
|
|
],
|
|
[AC_MSG_RESULT(yes)
|
|
FREETYPE_LIBS=`pkg-config freetype2 --libs`
|
|
AC_SUBST(FREETYPE_LIBS)
|
|
AC_DEFINE(HAVE_FREETYPE,1,[Define if you have the FreeType2 library])
|
|
CPPFLAGS="$old_CPPFLAGS"],
|
|
[AC_MSG_ERROR([Need FreeType library version 2.10.2 or higher])])
|
|
|
|
----------------------------------------------------------------------
|
|
|
|
Copyright (C) 2002-2021 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 VERSIONS.TXT ---
|