24. Backwards Compatibility
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नई रूपरेखा वेब पर प्रकाशित |
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These release notes may be updated. To view the latest release notes for Fedora, visit: |
Fedora provides legacy system libraries for compatibility with older software. This software is part of the Legacy Software Development group, which is not installed by default. Users who require this functionality may select this group either during installation or after the installation process is complete. To install the package group on a Fedora system, use → or enter the following command in a terminal window:
su -c "yum groupinstall 'Legacy Software Development'"
Enter the password for the
root account when
prompted.
24.1. Compiler Compatibility
The compat-gcc-34 package has been included for compatibility reasons:
https://www.redhat.com/archives/fedora-devel-list/2006-August/msg00409.html
24.2. KDE 3 Development Platform / Libraries
Fedora now features KDE 4.0, and no longer offers KDE 3 as a full desktop environment. Fedora does provide the following KDE 3.5 library packages to run and build the many existing KDE 3 applications:
qt3 , qt3-devel (and other qt3-* packages): Qt 3.3.8b
kdelibs3 , kdelibs3-devel : KDE 3 libraries
kdebase3 , kdebase3-devel : KDE 3 core files required by some applications
In addition, Fedora offers a kdegames3 package that includes games not ported to KDE 4 yet, and a KDE 3 version of libkdegames required by some third-party KDE 3 games.
Moreover, the KDE 4 kdebase-runtime package, which provides khelpcenter , also sets up khelpcenter as a service for KDE 3 applications, so help in KDE 3 applications works. The KDE 3 version of khelpcenter is no longer provided, and the KDE 4 version is used instead.
These packages are designed to:
comply with the Filesystem Hierarchy Standard (FHS), and
be completely safe to install in parallel with KDE 4, including the -devel packages.
In order to achieve this goal, Fedora KDE SIG members have made two changes to the KDE 4 kdelibs-devel packages:
The library symlinks are installed to
/usr/lib/kde4/develor/usr/lib64/kde4/develdepending on system architecture.The
kconfig_compilerandmakekdewidgetstools have been renamedkconfig_compiler4andmakekdewidgets4, respectively.
These changes should be completely transparent to the vast
majority of KDE 4 applications that use cmake
to build, since FindKDE4Internal.cmake has
been patched to match these changes. The KDE SIG made these
changes to the KDE 4 kdelibs-devel rather than
to kdelibs3-devel because KDE 4 stores these
locations in a central place, whereas KDE 3 applications usually
contain hardcoded copies of the library search paths and
executable names.
Note that kdebase3 does not include the following:
A complete KDE 3 desktop (workspace) which could be used instead of KDE 4; in particular, KDE 3 versions of KWin, KDesktop, Kicker, KSplash and KControl are not included.
The KDE 3 versions of kdebase applications such as Konqueror and KWrite, which are redundant with the KDE 4 versions and would conflict with them.
The libkdecorations library required for KWin 3 window decorations, as those window decorations cannot be used in the KDE 4 version of KWin.
The libkickermain library required by some Kicker applets, as there is no Kicker in Fedora 9 and thus Kicker applets cannot be used.
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Developing against the legacy API is discouraged |
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As with any backwards-compatibility library, developing new software against the legacy API is discouraged. |