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Chapter 3.
21
Libraries and Runtime Support
Red Hat Enterprise Linux 6 supports the development of custom applications in a wide variety of
programming languages using proven, industrial-strength tools. This chapter describes the runtime
support libraries provided in Red Hat Enterprise Linux 6.
3.1. Version Information
The following table compares the version information for runtime support packages in supported
programming languages between Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 5.
This is not an exhaustive list. Instead, this is a survey of standard language runtimes, and key
dependencies for software developed on Red Hat Enterprise Linux 6.
Table 3.1. Language and Runtime Library Versions
Package Name 6 5 4
glibc 2.12 2.5 2.3
libstdc++ 4.4 4.1 3.4
boost 1.41 1.33 1.32
java 1.5 (IBM), 1.6 (IBM,
OpenJDK)
1.4, 1.5, and 1.6 1.4
python 2.6 2.4 2.3
php 5.3 5.1 4.3
ruby 1.8 1.8 1.8
httpd 2.2 2.2 2.0
postgresql 8.4 8.1 7.4
mysql 5.1 5.0 4.1
nss 3.12 3.12 3.12
openssl 1.0.0 0.9.8e 0.9.7a
libX11 1.3 1.0
firefox 3.6 3.6 3.6
kdebase 4.3 3.5 3.3
gtk2 2.18 2.10 2.04
3.2. Compatibility
Compatibility specifies the portability of binary objects and source code across different instances of a
computer operating environment. There are two types of compatibility:
Source Compatibility
Source compatibility specifies that code will compile and execute in a consistent and predictable
way across different instances of the operating environment. This type of compatibility is defined
by conformance with specified Application Programming Interfaces (APIs).
Binary Compatibility
Binary Compatibility specifies that compiled binaries in the form of executables and Dynamic
Shared Objects (DSOs) will run correctly across different instances of the operating environment.
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