On May 5, 2008, at 9:27 PM, Theo Schlossnagle wrote:
The patch has some nastiness to it that I'm sure people would want
to strategize on cleaning up. The main issue being that Apache is
constructed from a bunch of static apr/libtool built libraries.
DTrace doesn't work on archives. So, I've got some bloody knuckles
from bending the build system to keep things as normal ELF objects.
I had a first good step... and then a red herring issue that I
worked through with the DTrace team led me to a much less-elegant
way of building. I could revert to the original process (ld -r -o
the objects into library-esque packages) as DTrace can work on those.
The probes are neatly defined and placed, but the patches to the
build system are gruesome.
The apr-util patch to the apr_hooks.h is simple and affords some
nice probability for future probe uses.
Docs on these probes are available here:
https://labs.omniti.com/trac/project-dtrace/wiki/
Applications#Apache2.2.x
I'm not on this list -- Cc me on pertinent responses please.
Works lovely on Solaris with the normal/real libtool - but not with
Justin's. On MacOSX I think there is something wrong with the linker.
Either MacOS does not need the extra -G or -h is enough on all
platforms.
What is the downside/penalty for making this a default ? Or should
this always be an optional thing - set at ./configure time ?
Dw.
