Summary of my perl5 (revision 5 version 10 subversion 1) configuration: Platform: osname=freebsd, osvers=freebsd, archname=amd64-freebsd-thread-multi uname='freebsd 8.0-release freebsd 8.0-release #0: sat nov 21 15:02:08 utc 2009 root@mason.cse.buffalo.edu:usrobjusrsrcsysgeneric amd64 ' config_args='-sde -Dprefix=/usr/local -Darchlib=/usr/local/lib/perl5/5.10.1/mach -Dprivlib=/usr/local/lib/perl5/5.10.1 -Dman3dir=/usr/local/lib/perl5/5.10.1/perl/man/man3 -Dman1dir=/usr/local/man/man1 -Dsitearch=/usr/local/lib/perl5/site_perl/5.10.1/mach -Dsitelib=/usr/local/lib/perl5/site_perl/5.10.1 -Dscriptdir=/usr/local/bin -Dsiteman3dir=/usr/local/lib/perl5/5.10.1/man/man3 -Dsiteman1dir=/usr/local/man/man1 -Ui_malloc -Ui_iconv -Uinstallusrbinperl -Dcc=cc -Duseshrplib -Dinc_version_list=none -Dccflags=-DAPPLLIB_EXP="/usr/local/lib/perl5/5.10.1/BSDPAN" -Doptimize=-O2 -pipe -fno-strict-aliasing -Ud_dosuid -Ui_gdbm -Dusethreads=y -Dusemymalloc=n -Duse64bitint' hint=recommended, useposix=true, d_sigaction=define useithreads=define, usemultiplicity=define useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef use64bitint=define, use64bitall=define, uselongdouble=undef usemymalloc=n, bincompat5005=undef Compiler: cc='cc', ccflags ='-DAPPLLIB_EXP="/usr/local/lib/perl5/5.10.1/BSDPAN" -DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include', optimize='-O2 -pipe -fno-strict-aliasing', cppflags='-DAPPLLIB_EXP="/usr/local/lib/perl5/5.10.1/BSDPAN" -DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include' ccversion='', gccversion='4.2.1 20070719 [FreeBSD]', gccosandvers='' intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678 d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16 ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8 alignbytes=8, prototype=define Linker and Libraries: ld='cc', ldflags ='-pthread -Wl,-E -fstack-protector -L/usr/local/lib' libpth=/usr/lib /usr/local/lib libs=-lm -lcrypt -lutil perllibs=-lm -lcrypt -lutil libc=, so=so, useshrplib=true, libperl=libperl.so gnulibc_version='' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' -Wl,-R/usr/local/lib/perl5/5.10.1/mach/CORE' cccdlflags='-DPIC -fPIC', lddlflags='-shared -L/usr/local/lib -fstack-protector' Characteristics of this binary (from libperl): Compile-time options: MULTIPLICITY PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP USE_64_BIT_ALL USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES USE_PERLIO USE_REENTRANT_API Built under freebsd Compiled at Apr 6 2010 15:24:19 @INC: /usr/local/lib/perl5/5.10.1/BSDPAN /usr/local/lib/perl5/site_perl/5.10.1/mach /usr/local/lib/perl5/site_perl/5.10.1 /usr/local/lib/perl5/5.10.1/mach /usr/local/lib/perl5/5.10.1 .