mirror of https://github.com/fltk/fltk
123 lines
4.3 KiB
Plaintext
123 lines
4.3 KiB
Plaintext
Configuration of the ABI version for the Fast Light Toolkit (FLTK)
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------------------------------------------------------------------
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FLTK preserves the application binary interface (ABI) throughout
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patch versions, for instance all 1.3.x versions (x = patch version).
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This basically means that a program compiled and linked with FLTK 1.3.0
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can run with a FLTK shared library (fltk.dll, fltk.so.1.3.x) of a later
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FLTK version 1.3.x, but not with a shared library of FLTK 1.4.0 or later.
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Since FLTK 1.3.1 the FLTK team began to introduce ABI-breaking features
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wrapped in so-called ABI guards in the library code, e.g.
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#if FL_ABI_VERSION >= 10401
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... new, ABI breaking code ...
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#else
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... old, ABI preserving code ...
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#endif
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Note: In FLTK 1.3.x this preprocessor macro was named FLTK_ABI_VERSION.
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In FLTK 1.4.0 FLTK_ABI_VERSION was renamed to FL_ABI_VERSION.
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This documentation is written for FLTK 1.4.x, but it applies to all later
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versions as well. Replace the version numbers given here with the version
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numbers of the version you are using. FLTK version 1.4.1 was chosen as an
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example only. As of this writing, FLTK 1.4.1 does not yet exist.
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How to define the FLTK ABI version
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----------------------------------
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To define the ABI version the preprocessor macro FL_ABI_VERSION must be
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defined as a number representing the ABI version in the form
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#define FL_ABI_VERSION 1xxyy
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where xx and yy are the minor and patch versions, resp. with leading zeroes,
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and '1' is the major version number.
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The default ABI version for all FLTK 1.4.x versions is 10400 (the binary
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version of FLTK 1.4.0), but you can configure another version, e.g.
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10401 for FLTK 1.4.1 to enable the ABI features of FLTK 1.4.1 and all
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previous versions. See CHANGES.txt file.
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Depending on how you build FLTK, there are two different ways to configure
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the ABI version. The default is always the lowest version (e.g. 10400). All
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following examples are written for FLTK 1.4.1, hence we use "10401" for
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the version number.
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(1) Traditional configure + make (Unix, Linux, MinGW etc.)
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----------------------------------------------------------
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Run
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make clean
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./configure --with-abiversion=10401
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make
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This will generate FL/fl_config.h and build FLTK as usual.
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Note: you should always make sure that you compile everything from
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scratch if you change the ABI version or any other configuration
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options, e.g. with `make clean'.
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(2) CMake + make
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----------------
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FLTK versions 1.4.0 and later contain full CMake support.
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Use CMake to build the Makefile's and run 'make'. To configure the
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ABI version, use ccmake, cmake-gui, or run cmake with the following
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command:
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cmake -D FLTK_ABI_VERSION:STRING=10401 /path/to/fltk
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Then execute
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make
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You can define FLTK_ABI_VERSION to the required version number using
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one of the graphical CMake tools.
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For more information on how to use CMake with FLTK see README.CMake.txt.
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(3) CMake + IDE Projects: Visual C++, Xcode, other IDE's
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--------------------------------------------------------
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FLTK versions 1.4.0 and later contain full CMake support.
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IDE project files are no longer included in the FLTK source distribution.
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You need to install CMake to generate the IDE files.
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Use CMake to generate the IDE project files of your choice. Currently
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the FLTK team uses some Visual C++ (Visual Studio) versions and Xcode.
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Other IDE's may work as well (not yet tested).
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For more informations on how to install and use CMake see ...
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... *FIXME* [Add documentation how to use CMake with FLTK].
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Use CMake option FLTK_ABI_VERSION:STRING=10401 with the command line
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or set FLTK_ABI_VERSION with one of the CMake GUI programs.
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Then start the build process in the IDE solution of your choice. This
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will run the build with the defined ABI version.
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General note on CMake:
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----------------------
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CMake generates FL/fl_config.h in the build tree. You may run
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'make install' to install the FLTK library including all headers in
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the chosen installation directory, although this is not necessary.
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The FLTK team recommends to use the FLTK library directly from the
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build folder. See README.CMake.txt for more information.
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Possible exception: Visual Studio IDE builds (Windows).
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... to be continued ...
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