On 01/20/2012 08:38 AM, Robert Schwebel wrote: > On Fri, Jan 20, 2012 at 08:31:44AM +0100, Michael Olbrich wrote: >> On Fri, Jan 20, 2012 at 06:30:49AM +0100, Robert Schwebel wrote: >>> On Thu, Jan 19, 2012 at 10:47:55PM +0100, Michael Olbrich wrote: >>>> we had some patches lately about configure scripts etc. using >>>> uname to detect stuff. Why don't we create a fake >>>> ../sysroot-cross/bin/uname that produces the output we would >>>> expect on the target? This way we don't have to fix all those >>>> packages and we have on less source of host system information >>>> leaking into the build. >>> >>> Are there any host tools which do also run uname? I'd prefer >>> overwriting cached variables or something like that. >> >> That's why I want to place it in sysroot-cross/bin. That's not in PATH >> for hosttools. > > Hmm, I'm still not sure if this was side-effect free. However, leaving > it as it is will result in at least the same ammount of failures :-) > > Marc, do you have an oppinion?
We cannot overwrite uname, because even configure with --host and
--build uses uname:
$ strace -o log -e execve -f ./configure --host=x86_64-unknown-linux-gnu
--build=x86_64-unknown-linux-gnu
$ grep uname log
1610 execve("/bin/uname", ["uname", "-m"], [/* 51 vars */]) = 0
1612 execve("/bin/uname", ["uname", "-r"], [/* 51 vars */]) = 0
1614 execve("/bin/uname", ["uname", "-s"], [/* 51 vars */]) = 0
1616 execve("/bin/uname", ["uname", "-v"], [/* 51 vars */]) = 0
1618 execve("/usr/bin/uname", ["/usr/bin/uname", "-p"], [/* 51 vars */]) = -1
ENOENT (No such file or directory)
1620 execve("/bin/uname", ["/bin/uname", "-X"], [/* 51 vars */]) = 0
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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