Enabling dtrace on Apache on FreeBSD

HI i am using freeBSD as my operating system.I have apache version 2.2.16 installed on it.I want to make this dtrace enabled.How can i do this.Thanks in a开发者_JAVA技巧dvance

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For enabling dtrace on Freebsd one can follow this link. Ive tried it its working.

http://prefetch.net/projects/apache_modtrace/index.html

One things just in build instruction dont use the mapfile.Just skip it.By doing this the build will be successful