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Diffstat (limited to 'Build/source/libs/freetype2/freetype-2.6/docs/VERSION.DLL')
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1 files changed, 129 insertions, 0 deletions
diff --git a/Build/source/libs/freetype2/freetype-2.6/docs/VERSION.DLL b/Build/source/libs/freetype2/freetype-2.6/docs/VERSION.DLL new file mode 100644 index 00000000000..f219c9ac975 --- /dev/null +++ b/Build/source/libs/freetype2/freetype-2.6/docs/VERSION.DLL @@ -0,0 +1,129 @@ +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 + ------------------------------- + 2.6.0 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 + 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 2002-2015 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 --- |