gnu/114085: share/mk/sys.mk 1.89 breaks upgrade to current

[Kevin at es.net]

>Number:         114085
>Category:       gnu
>Synopsis:       share/mk/sys.mk 1.89 breaks upgrade to current
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jun 28 01:30:09 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Kevin Oberman
>Release:        FreeBSD 7.0-CURRENT i386
>Organization:
ESnet-The Energy Sciences Network
>Environment:
System: FreeBSD slan.es.net 7.0-CURRENT FreeBSD 7.0-CURRENT #2: Tue Jun 26 16:20:11 PDT 2007 root at slan.es.net:/usr/obj/usr/src/sys/IBM-T43 i386


	
>Description:
	
The addition of -fno-tree-vrp to CFLAGS in sys.mk breaks the build if the
system is being upgraded from a system running 3.x of the compiler. This
needs to be made conditional based on version so that upgrades work properly.
>How-To-Repeat:
	
>Fix:

Make the addition of this flag conditional on __FreeBSD_version >= 700042.
	


>Release-Note:
>Audit-Trail:
>Unformatted: