Rob,
I have 5.20.1 with COW turned off. When recompiled with COW turned
on, then it keeps the value, as you found. Below are the configure
arguments that creates the error. Agree its an error? I turn COW off to
avoid the problems discussed earlier, and will stay with the latest perl
that allows turning COW off.
I am not generally constrained by perl, the few annoyances being:
inability to reclaim memory, to uninstall a module and have warnings
for all unused variables. And then COW and now this.
Niels
------------------------------------------------
~/BION/Software/bin> ./perl -V
Summary of my perl5 (revision 5 version 20 subversion 1) configuration:
Platform:
osname=linux, osvers=3.13.0-24-generic, archname=i686-linux-64int
uname='linux think2 3.13.0-24-generic #47-ubuntu smp fri may 2
23:31:42 utc 2014 i686 gnulinux '
config_args='-de -Accflags=-fPIC -Accflags=-DPERL_NO_COW
-Dprefix=/home/niels/BION/Software/Package_installs/Perl -Duse64bitint'
hint=recommended, useposix=true, d_sigaction=define
useithreads=undef, usemultiplicity=undef
use64bitint=define, use64bitall=undef, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-fPIC -DPERL_NO_COW -fwrapv -fno-strict-aliasing
-pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-fPIC -DPERL_NO_COW -fwrapv -fno-strict-aliasing -pipe
-fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.8.2', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long long', ivsize=8, nvtype='double', nvsize=8,
Off_t='off_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
libpth=/home/niels/BION/Software/lib /usr/local/lib
/usr/lib/gcc/i686-linux-gnu/4.8/include-fixed /usr/include/i386-linux-gnu
/usr/lib /lib/i386-linux-gnu /lib/../lib /usr/lib/i386-linux-gnu
/usr/lib/../lib /lib
libs=-lnsl -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=libc-2.19.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.19'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib
-fstack-protector'
Characteristics of this binary (from libperl):
Compile-time options: HAS_TIMES PERLIO_LAYERS PERL_DONT_CREATE_GVSV
PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
PERL_MALLOC_WRAP
PERL_PRESERVE_IVUV PERL_SAWAMPERSAND
USE_64_BIT_INT
USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE
USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_PERLIO
USE_PERL_ATOF
Built under linux
Compiled at Sep 14 2014 20:40:59
@INC:
/home/niels/BION/Software/Package_installs/Perl/lib/perl5/site_perl/5.20.1/i686-linux-64int
/home/niels/BION/Software/Package_installs/Perl/lib/perl5/site_perl/5.20.1
/home/niels/BION/Software/Package_installs/Perl/lib/perl5/5.20.1/i686-linux-64int
/home/niels/BION/Software/Package_installs/Perl/lib/perl5/5.20.1
.
~/BION/Software/bin>
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