Summary of my perl5 (revision 5.0 version 6 subversion 1) configuration:

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  Platform:
    osname=linux, osvers=2.4.18-3, archname=i386-linux
    uname='linux grcdg028 2.4.18-3 #1 thu apr 18 07:37:53 edt 2002 i686 unknown '
    config_args='-des -Doptimize=-O2 -march=i386 -mcpu=i686 -Dcc=gcc -Dcf_by=Red Hat, Inc. -Dcccdlflags=-fPIC -Dinstallprefix=
sr -Dprefix=/usr -Darchname=i386-linux -Dvendorprefix=/usr -Dsiteprefix=/usr -Uusethreads -Uuseithreads -Uuselargefiles -Dd_do
id -Dd_semctl_semun -Di_db -Di_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
    useperlio=undef d_sfio=undef uselargefiles=undef usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
  Compiler:
    cc='gcc', ccflags ='-fno-strict-aliasing -I/usr/local/include',
    optimize='-O2 -march=i386 -mcpu=i686',
    cppflags='-fno-strict-aliasing -I/usr/local/include'
    ccversion='', gccversion='2.96 20000731 (Red Hat Linux 7.3 2.96-110)', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=4
    alignbytes=4, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -ldl -lm -lc -lcrypt -lutil
    perllibs=-lnsl -ldl -lm -lc -lcrypt -lutil
    libc=/lib/libc-2.2.5.so, so=so, useshrplib=false, libperl=libperl.a
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl):
  Compile-time options:
  Built under linux
  Compiled at Sep  3 2003 17:48:23
  @INC:
    /usr/lib/perl5/5.6.1/i386-linux
    /usr/lib/perl5/5.6.1
    /usr/lib/perl5/site_perl/5.6.1/i386-linux
    /usr/lib/perl5/site_perl/5.6.1
    /usr/lib/perl5/site_perl
    /usr/lib/perl5/vendor_perl/5.6.1/i386-linux
    /usr/lib/perl5/vendor_perl/5.6.1
    /usr/lib/perl5/vendor_perl
    .

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Compiling REx `^((?x-ism: [^\?]*? ))/((?x-ism: [^/\?]*? ))$'

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size 21 first at 2
   1: BOL(2)
   2: OPEN1(4)
   4:   MINMOD(5)
   5:   STAR(8)
   6:     ANYOFUTF8[^?...003f   003f](0)
   8: CLOSE1(10)
  10: EXACT </>(12)
  12: OPEN2(14)
  14:   MINMOD(15)
  15:   STAR(18)
  16:     ANYOFUTF8[^/?...002f  002f 003f       003f](0)
  18: CLOSE2(20)
  20: EOL(21)
  21: END(0)
floating `/' at 0..2147483647 (checking floating) anchored(BOL) minlen 1
Guessing start of match, REx `^((?x-ism: [^\?]*? ))/((?x-ism: [^/\?]*? ))$' against `pf1ad1%/pf2%2Fad2/pdad3/pfad4/filename'..Found floating substr `/' at offset 7...
Guessed: match at offset 0
Matching REx `^((?x-ism: [^\?]*? ))/((?x-ism: [^/\?]*? ))$' against `pf1ad1%/pf2%2Fad2/pdad3/pfad4/filename'
  Setting an EVAL scope, savestack=9
   0 <> <pf1ad1%/pf2%>    |  1:  BOL
   0 <> <pf1ad1%/pf2%>    |  2:  OPEN1
   0 <> <pf1ad1%/pf2%>    |  4:  MINMOD
   0 <> <pf1ad1%/pf2%>    |  5:  STAR
  Setting an EVAL scope, savestack=9
   0 <> <pf1ad1%/pf2%>    |  8:    CLOSE1
   0 <> <pf1ad1%/pf2%>    | 10:    EXACT </>
                              failed...
                           ANYOFUTF8[^?...003f  003f] can match 38 times out of 1...
  38 <ad4/filename> <>    |  8:    CLOSE1
  38 <ad4/filename> <>    | 10:    EXACT </>
                              failed...
                           ANYOFUTF8[^?...003f  003f] can match 0 times out of 1...
                            failed...

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Match failed