8291d253b6
src/gzip/inftrees.c, src/gzip/zconf.h, src/gzip/zlib.h,
src/gzip/zutil.h: updates to allow compilation without compiler
warnings with LCC-Win32
* include/freetype/freetype.h, docs/VERSION.DLL,
builds/unix/configure.ac: updates for the upcoming 2.1.4 release
80 lines
2.9 KiB
Plaintext
80 lines
2.9 KiB
Plaintext
Due to our use of "libtool" to generate and install the FreeType 2 libraries
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on Unix systems, as well as other historical events, it is generally very
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difficult to know precisely which release of the font engine is installed
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on a given system.
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This file tries to explain why and to document ways to properly detect
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FreeType on Unix.
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I. Version & Release numbers:
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For each new public release of FreeType 2, there are generally *three*
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distinct "version" numbers to consider:
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* the official FT2 release number, like 2.0.9, or 2.1.3
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* the libtool (and Unix) specific version number, like "9.2.3". This
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is what "freetype-config --version" will return
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* the platform-specific shared object number, used for example when
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the library is installed as "/usr/lib/libfreetype.so.6.3.2"
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the platform-specific number is, unsurprisingly, platform-specific and varies
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with the operating system you're using (several variants of Linux, FreeBSD,
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Solaris, etc...). You should thus _never_ use it, even for simple tests.
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the libtool-specific number does not equal the release number but is tied
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to it.
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the release number is available at *compile* time through the following
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macros defined in FT_FREETYPE_H:
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- FREETYPE_MAJOR : major release number
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- FREETYPE_MINOR : minor release number
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- FREETYPE_PATCH : patch release number
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see below for some Autoconf fragment to
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the release number is also available at *runtime* through the
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"FT_Library_Version" API. Unfortunately, this one wasn't available or
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working correctly before the 2.1.3 official release !!
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II. Table:
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the following is a simple table that gives, for each official release,
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the corresponding libtool number, as well as the shared object number
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found on _most_ systems, but not all of them:
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release libtool so
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-------------------------------------
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2.1.4 9.3.3 6.3.3
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2.1.3 9.2.3 6.3.2
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2.1.2 9.1.3 6.3.1
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2.1.1 ? ?
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2.1.0 ? ?
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2.0.9 ? ?
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III. AutoConf Code Fragment:
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Lars Clausen contributed the following Autoconf fragment to detect at
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which version of FreeType is installed on your system. This one tests
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for a version that is at least 2.0.9, you should change the last line to
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check against other release numbers.
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AC_MSG_CHECKING([for version of FreeType])
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FREETYPE_INCLUDE=`freetype-config --cflags | cut -c3-`
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FREETYPE_MAJOR=`grep '^#define FREETYPE_MAJOR' $FREETYPE_INCLUDE/freetype/freetype.h | cut -d' ' -f3`
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FREETYPE_MINOR=`grep '^#define FREETYPE_MINOR' $FREETYPE_INCLUDE/freetype/freetype.h | cut -d' ' -f3`
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FREETYPE_PATCH=`grep '^#define FREETYPE_PATCH' $FREETYPE_INCLUDE/freetype/freetype.h | cut -d' ' -f3`
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FREETYPE_VERSION=`echo | awk "BEGIN { printf \"%d\", ($FREETYPE_MAJOR * 1000 + $FREETYPE_MINOR) * 1000 + $FREETYPE_PATCH;}"`
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AC_MSG_RESULT([$FREETYPE_MAJOR.$FREETYPE_MINOR.$FREETYPE_PATCH])
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if test "$FREETYPE_VERSION" -ge 2000009; then
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