[Bug other/42980] GCC parallel "make install" failures

["gary at intrepid dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from gary at intrepid dot com  2010-02-08 23:11 -------
Created an attachment (id=19827)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19827&action=view)
Log excerpts of parallel make install failures

Excerpts from parallel install (ie, "make -j6 install") failures.  Each file is
separated by "=== <file> ===" strings.  Search for the word "cannot" to find
the point of failure.  These are mainly libiberty failures, with a single
libssp failure.  We saw a similar libgomp failure to the libssp failure, but
apparently didn't save the log file.  The problem can be replicated by creating
a loop that repeatedly runs "make -j6 install", and that saves the log when a
failure is detected.  The -j6 is arbitrary - this turns out to be the "sweet
spot" for parallel makes on our 4 core system.

Something like this:

#!/bin/sh
dest=`pwd`/rls
for i in `seq 1 1000`; do
  for j in 6; do
    echo "$i: make -j$j install"
    rm -rf $dest
    logfile="install-${i}-${j}.log"
    make -j$j -C bld DESTDIR=$dest install >& $logfile
    if [ $? -ne 0 ]; then
      echo "$i: make -j$j install failed."
    else
      rm -f $logfile
    fi
  done
done


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42980