C:\perl561\bin>perl5.6.1 -V
Summary of my perl5 (revision 5 version 6 subversion 1) configuration:
  Platform:
    osname=MSWin32, osvers=4.0, archname=MSWin32-x86-multi-thread
    uname=''
    config_args='undef'
    hint=recommended, useposix=true, d_sigaction=undef
    usethreads=undef use5005threads=undef useithreads=define usemultiplicity=define
    useperlio=undef d_sfio=undef uselargefiles=undef usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
  Compiler:
    cc='cl', ccflags ='-nologo -O1 -MD -Zi -DNDEBUG -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT  -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DPERL_MSVCRT_READFIX',
    optimize='-O1 -MD -Zi -DNDEBUG',
    cppflags='-DWIN32'
    ccversion='', gccversion='', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=undef, longlongsize=8, d_longdbl=define, longdblsize=10
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=4
    alignbytes=8, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='link', ldflags ='-nologo -nodefaultlib -debug -opt:ref,icf  -libpath:"c:\perl561\lib\CORE"  -machine:x86'
    libpth="c:\cl\lib" "C:\HLA\hlalib" "" "c:\hla\hlalib" "c:\perl561\\lib\CORE"
    libs=  oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib  comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib  netapi32.lib uuid.lib wsock32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.lib msvcrt.lib
    perllibs=  oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib  comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib  netapi32.lib uuid.lib wsock32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.lib msvcrt.lib
    libc=msvcrt.lib, so=dll, useshrplib=yes, libperl=perl56.lib
  Dynamic Linking:
    dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags='-dll -nologo -nodefaultlib -debug -opt:ref,icf  -libpath:"c:\perl561\lib\CORE"  -machine:x86'


Characteristics of this binary (from libperl):
  Compile-time options: MULTIPLICITY USE_ITHREADS PERL_IMPLICIT_CONTEXT PERL_IMPLICIT_SYS
  Locally applied patches:
        ActivePerl Build 638
  Built under MSWin32
  Compiled at Apr 13 2004 19:24:21
  %ENV:
    PERLDB_OPTS=""Nonstop frame=2""
  @INC:
    C:/perl561/lib
    C:/perl561/site/lib
    .


C:\perl561\bin>type p:387607.pl
use strict;
use warnings;
use POSIX qw(:sys_wait_h);

my $segfault=257; # set this to 188 to make perl segfault under 5.6.1

print $$,$/;
$|++;
my @pid;
foreach my $i (0..3) {
    my $cmd='perl -le "print qq(hello world!); sleep '
           .(10+$i*2)
           .(';' x $segfault )
           .'; print qq(foo); " >NUL 2>&1';
    print length($cmd),$/;
    $pid[$i]=system(1,$cmd);
}
my @wait=(0) x 4;
my $c=0;
while (grep !$_,@wait) {
    print(qq(running... @{[$c++]} [@wait]\r));
    foreach my $i (0..3) {
        $wait[$i]||=waitpid($pid[$i], &WNOHANG);
    }
    sleep(1);
}
print(qq(Finished:  @{[$c++]} [@wait]\r));

C:\perl561\bin>perl5.6.1 p:387607.pl
1328
327
327
327
327
Finished:  18 [1364 928 1020 736]