glibc 2.9 "make check" fails on rt/tst-cputimer with "timer sig[12] invoked to soon"

["Jay F. Shachter" <jay at m5 dot chicago dot il dot us>]

I wish to install a new libc.so and have compiled the latest
glibc (2.9.90) with the latest gcc (4.3.3) and the latest
binutils (2.19, compiled with gcc 4.3.3).  Compilation
succeeded without errors, although not before I did some non-
obvious things (e.g., I had to put '-march=i686' into my
CFLAGS to avoid getting undefined symbol errors from the
linker).  'Make check' also produced errors, a number of which
I averted by doing non-obvious things (e.g., I had to copy
iconvdata/gconv-modules and libio/tst-*.input from the source
directory to the build directory, and I had to export into the
environment TIMEOUTFACTOR=2; the glibc documentation gave me
no clue that I had to do any of those things).  Now I am
running into an error with rt/tst-cputimer that I do not know
how to avert.  I have run 'make check' 3 times; here are the
3 results.  From rt/tst-cputimer1.out:

 clock_gettime returned timespec = { 0, 8000000 }
 clock_getres returned timespec = { 0, 1 }
 *** timer sig1 invoked too soon: 2.908000000 instead of expected
3.408000000
 *** timer sig2 invoked too soon: 2.908000000 instead of expected
3.908000000

And from rt/tst-cputimer2.out:

 clock_gettime returned timespec = { 0, 0 }
 clock_getres returned timespec = { 0, 1 }
 *** timer sig1 invoked too soon: 2.900000000 instead of expected
3.400000000
 *** timer sig2 invoked too soon: 2.900000000 instead of expected
3.900000000

Before running the 3rd 'make check', I increased TIMEOUTFACTOR
(to 3).  It made no difference.  From rt/tst-cputimer3.out:

 clock_gettime returned timespec = { 0, 0 }
 clock_getres returned timespec = { 0, 1 }
 *** timer sig1 invoked too soon: 2.900000000 instead of expected
3.400000000
 *** timer sig2 invoked too soon: 2.900000000 instead of expected
3.900000000


I don't want to install the new libc.so until I can get all the
tests to succeed, or, failing that, until I understand the
significance of the error, and can intelligently dismiss it.
What shall I do?  Thank you in advance for your replies.


                        Jay F. Shachter
                        6424 North Whipple Street
                        Chicago IL  60645-4111
                           (1-773) 7613784
                           jay@m5.chicago.il.us
                           http://m5.chicago.il.us

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