Fedora-Red Hat ABI Compatibility

Work-In-Progress (WIP) Updated 2006Jul30

The application binary interface (ABI) of Fedora Core (FC) and prior Red Hat Linux (RHL), and their subsequent Red Hat Enterprise Linux (RHEL), releases are as follows ...

Service Level Agreement (SLA) Generations

		ABI			Dates / Support End
Release		GLibC	GCC	Kernel	Availability	Official	Legacy
RHEL5		2.5?	4.1	2.6	alpha
	FC6	2.4.9x			test
	FC5	2.4.0			06Mar	active
	FC4	2.3.5	4.0		05Jun	active
RHEL4		2.3	3.4	2.6	05Feb	active	n/a
	FC3				04Nov	06Jan	active
	FC2		3.3		04May	05Apr	active
RHEL3		2.3	3.2	2.4	03Oct	active	n/a
	FC1		3.3		03Nov	04Sep	active
	RHL9				03Mar	04Apr	active
	RHL8.0	2.2.93			02Sep	03Dec	04May
RHEL2		2.2	2.96/3.0	2.4	02Mar	active	n/a
	RHL7.3		2.96-only		02May	03Dec	active
	RHL7.2				01Oct	03Dec	04May
	RHL7.1				01Apr	03Dec	04May
	RHL7	2.1.92	2.96-only	2.2	00Sep	03Dec	none
RHL6.2E		2.1	egcs1.1.2	2.2	00Apr	03Mar	none
	RHL6.2				00Apr	03Mar	none
	RHL6.1				99Oct	02Jan	none
	RHL6.0				99Apr	02Jan	none

Pre-Service Level Agreement (SLA) Generations

		ABI			Date / Support End
Release		LibC	GCC	Kernel	Availability	Last Update
RHL5		GLibC2.0	2.7.2	2.0
	RHL5.2			+2.2	98Nov	99Jul
	RHL5.1				98May	99Apr
	RHL5.0				97Dec	99Apr
RHL4		LibC 5.3	2.7.2	2.0
	RHL4.2				97May	99Jul
	RHL4.1				97Feb	97Jul
	RHL4.0				96Oct	97Jul