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| 1 Due to our use of `libtool' to generate and install the FreeType 2 | |
| 2 libraries on Unix systems, as well as other historical events, it is | |
| 3 generally very difficult to know precisely which release of the font | |
| 4 engine is installed on a given system. | |
| 5 | |
| 6 This file tries to explain why and to document ways to properly detect | |
| 7 FreeType on Unix. | |
| 8 | |
| 9 | |
| 10 1. Version and Release numbers | |
| 11 ------------------------------ | |
| 12 | |
| 13 For each new public release of FreeType 2, there are generally *three* | |
| 14 distinct `version' numbers to consider: | |
| 15 | |
| 16 * The official FreeType 2 release number, like 2.3.1 or 2.4.10. | |
| 17 | |
| 18 * The libtool (and Unix) specific version number, like 13.0.7. This | |
| 19 is what `freetype-config --version' returns. | |
| 20 | |
| 21 * The platform-specific shared object number, used for example when | |
| 22 the library is installed as `/usr/lib/libfreetype.so.6.7.1'. | |
| 23 | |
| 24 The platform-specific number is, unsurprisingly, platform-specific and | |
| 25 varies with the operating system you are using (several variants of | |
| 26 Linux, FreeBSD, Solaris, etc.). You should thus _never_ use it, even | |
| 27 for simple tests. | |
| 28 | |
| 29 The libtool-specific number does not equal the release number but is | |
| 30 tied to it. | |
| 31 | |
| 32 The release number is available at *compile* time through the following | |
| 33 macros defined in FT_FREETYPE_H: | |
| 34 | |
| 35 - FREETYPE_MAJOR: major release number | |
| 36 - FREETYPE_MINOR: minor release number | |
| 37 - FREETYPE_PATCH: patch release number | |
| 38 | |
| 39 See below for a small autoconf fragment. | |
| 40 | |
| 41 The release number is also available at *runtime* through the | |
| 42 `FT_Library_Version' API. | |
| 43 | |
| 44 | |
| 45 2. History | |
| 46 ---------- | |
| 47 | |
| 48 The following table gives, for all releases since 2.3.0, the | |
| 49 corresponding libtool number, as well as the shared object number found | |
| 50 on _most_ systems, but not all of them: | |
| 51 | |
| 52 | |
| 53 release libtool so | |
| 54 ------------------------------- | |
| 55 2.5.3 17.2.11 6.11.2 | |
| 56 2.5.2 17.1.11 6.11.1 | |
| 57 2.5.1 17.0.11 6.11.0 | |
| 58 2.5.0 16.2.10 6.10.2 | |
| 59 2.4.12 16.1.10 6.10.1 | |
| 60 2.4.11 16.0.10 6.10.0 | |
| 61 2.4.10 15.0.9 6.9.0 | |
| 62 2.4.9 14.1.8 6.8.1 | |
| 63 2.4.8 14.0.8 6.8.0 | |
| 64 2.4.7 13.2.7 6.7.2 | |
| 65 2.4.6 13.1.7 6.7.1 | |
| 66 2.4.5 13.0.7 6.7.0 | |
| 67 2.4.4 12.2.6 6.6.2 | |
| 68 2.4.3 12.1.6 6.6.1 | |
| 69 2.4.2 12.0.6 6.6.0 | |
| 70 2.4.1 11.1.5 6.5.1 | |
| 71 2.4.0 11.0.5 6.5.0 | |
| 72 2.3.12 10.0.4 6.4.0 | |
| 73 2.3.11 9.22.3 6.3.22 | |
| 74 2.3.10 9.21.3 6.3.21 | |
| 75 2.3.9 9.20.3 6.3.20 | |
| 76 2.3.8 9.19.3 6.3.19 | |
| 77 2.3.7 9.18.3 6.3.18 | |
| 78 2.3.6 9.17.3 6.3.17 | |
| 79 2.3.5 9.16.3 6.3.16 | |
| 80 2.3.4 9.15.3 6.3.15 | |
| 81 2.3.3 9.14.3 6.3.14 | |
| 82 2.3.2 9.13.3 6.3.13 | |
| 83 2.3.1 9.12.3 6.3.12 | |
| 84 2.3.0 9.11.3 6.3.11 | |
| 85 | |
| 86 | |
| 87 3. Autoconf Code Fragment | |
| 88 ------------------------- | |
| 89 | |
| 90 Lars Clausen contributed the following autoconf fragment to detect which | |
| 91 version of FreeType is installed on a system. This one tests for a | |
| 92 version that is at least 2.0.9; you should change it to check against | |
| 93 other release numbers. | |
| 94 | |
| 95 | |
| 96 AC_MSG_CHECKING([whether FreeType version is 2.0.9 or higher]) | |
| 97 old_CPPFLAGS="$CPPFLAGS" | |
| 98 CPPFLAGS=`freetype-config --cflags` | |
| 99 AC_TRY_CPP([ | |
| 100 | |
| 101 #include <ft2build.h> | |
| 102 #include FT_FREETYPE_H | |
| 103 #if (FREETYPE_MAJOR*1000 + FREETYPE_MINOR)*1000 + FREETYPE_PATCH < 2000009 | |
| 104 #error Freetype version too low. | |
| 105 #endif | |
| 106 ], | |
| 107 [AC_MSG_RESULT(yes) | |
| 108 FREETYPE_LIBS=`freetype-config --libs` | |
| 109 AC_SUBST(FREETYPE_LIBS) | |
| 110 AC_DEFINE(HAVE_FREETYPE,1,[Define if you have the FreeType2 library]) | |
| 111 CPPFLAGS="$old_CPPFLAGS"], | |
| 112 [AC_MSG_ERROR([Need FreeType library version 2.0.9 or higher])]) | |
| 113 | |
| 114 ------------------------------------------------------------------------ | |
| 115 | |
| 116 Copyright 2002-2014 by | |
| 117 David Turner, Robert Wilhelm, and Werner Lemberg. | |
| 118 | |
| 119 This file is part of the FreeType project, and may only be used, | |
| 120 modified, and distributed under the terms of the FreeType project | |
| 121 license, LICENSE.TXT. By continuing to use, modify, or distribute this | |
| 122 file you indicate that you have read the license and understand and | |
| 123 accept it fully. | |
| 124 | |
| 125 | |
| 126 --- end of VERSION.DLL --- |
