'make check' from system() under Python

[Albert Chin]

'make check' works fine when run from a shell. It works fine when run
from system() under Perl. However, when run under Python (2.2.3,
2.3.4, 2.4.2), "os.system('make check')" fails with:
  Checking ./134.sysval
  @ ../doc/m4.texinfo:4812: Origin of test
  ./134.sysval: stdout mismatch
  2c2
  < 3328
  ---
  > 0
  ...
  Failed checks were:
    ./134.sysval:out

Any ideas as to why?

The latest Fedora m4.spec has:
  * Sun Nov 26 2006 Miloslav Trmac <address@hidden> - 1.4.8-1
  - Update to m4-1.4.8

  * Wed Oct 25 2006 Miloslav Trmac <address@hidden> - 1.4.7-2
  - Drop %%check again.  SIGPIPE is set to SIG_IGN in mock, which breaks the
    sysval test.

I tried removing SIGPIPE from lib/fatal-signal.c but that didn't help.

-- 
albert chin (address@hidden)