ports/129600: Add HAVE_DTRACE_KERN to bsd.port.mk

[Steven Kreuzer]

>Number:         129600
>Category:       ports
>Synopsis:       Add HAVE_DTRACE_KERN to bsd.port.mk
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 12 19:40:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Steven Kreuzer
>Release:        7.1-PRERELEASE
>Organization:
>Environment:
FreeBSD slurry.exit2shell.com 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #3: Mon Nov 24 14:01:09 EST 2008     root at simon.sddi.net:/usr/obj/usr/src/sys/KERNEL  amd64
>Description:
The attached patch will check for the existence of the debug.dtrace.providers sysctl and if found, set HAVE_DTRACE_KERN to YES.

This will allow you to check if a kernel has dtrace support compiled in and then build applications with dtrace probes if they are available
>How-To-Repeat:

>Fix:


Patch attached with submission follows:

Index: bsd.port.mk
===================================================================
RCS file: /usr/share/cvs/freebsd/ports/Mk/bsd.port.mk,v
retrieving revision 1.604
diff -u -r1.604 bsd.port.mk
--- bsd.port.mk	5 Sep 2008 19:41:43 -0000	1.604
+++ bsd.port.mk	12 Dec 2008 19:25:55 -0000
@@ -1657,6 +1657,14 @@
 .endif
 .endif
 
+# Check for DTrace support 
+
+.if ${OSVERSION} >= 701000
+.if !defined(HAVE_DTRACE_KERN)
+HAVE_DTRACE_KERN!= if ${SYSCTL} -a debug.dtrace.providers >/dev/null 2>&1; then echo YES; fi
+.endif
+.endif
+
 # Check the compatibility layer for amd64/ia64
 
 .if ${ARCH} == "amd64" || ${ARCH} =="ia64"


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