fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged
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<skered>
How can I tell stap which compiler to use? I have a RHEL5 system with gcc (3.2) and gcc41 installed. stap is using gcc. It should be using gcc41
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<skered>
The reason why I believe it needs 4.1 is the ko file that's built won't load becaues of mismatch of the magic version string.
<skered>
the built ko is 3.2 where the system is expecting 4.1
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<jistone>
skered, did you build your own kernel with that gcc41? the kernel's gcc is what stap needs to match
<skered>
Ok the was someone mucked with /usr/bin/gcc
<skered>
So if I change it to gcc41's binary everything is fine. Someone thought it was a good idea to symlink /usr/bin/gcc to something that wasn't the system gcc.
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<skered>
jistone: But no *I* didn't build the kernel with 4.1 the kernel package kernel was built with 4.1 I'd assume
<skered>
I didn't check to see if the /usr/bin/gcc was from a package... it wasn't someone mucked with the system - I should have checked that first
<jistone>
ah, right, rhel5's native gcc is 4.1
<skered>
But if I can tell stap what compile to use that would be helpful
<jistone>
we actually have code to make sure gcc is not picked up from random user paths, to prefer the system compiler
<skered>
I haven't a clue why somoene would have changed that to gcc323. I think our devs can't handle things not being in the system set PATH so they expect everything (even on system stuff) be in /sbin:/bin:/usr/bin
<skered>
:(
<skered>
none*
<jistone>
I think you could override the kbuild flags, something like stap -BCC=/home/skered/bin/gcc
<jistone>
(where -B is stap's option, and the value that follows is added to the kbuild "make" command)
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<skered>
Yep, that did it.
<skered>
Thanks. I was focusing on -DCC=..
<jistone>
skered, sometimes we ship alternate gcc packages, like rhel5 has a gcc44.rpm
<jistone>
but that installs /usr/bin/gcc44, and leaves /usr/bin/gcc alone
<jistone>
skered, this would be a better model for your devs who insist on putting stuff in the system path
<skered>
I agree. And for any new systems they have /opt/ we've stopped letting them update any root level dirs.
<skered>
Sometimes I forget how they use to do things
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