| Subject: | cannot share a scalar |
Assigning a value to a scalar with the shared attribute causes the compiler to croak. It doesn't matter if you use the :shared attribute, or explicitly call share() on the variable.
[vk-dev]% cat shared-scalar
#!/usr/local/bin/perl
use forks;
my $flag : shared;
$flag = 0;
[vk-dev]% perl shared-scalar
Can't locate object method "FETCH" via package "threads::shared" at /usr/local/lib/perl5/site_perl/mach/5.20/forks.pm line 2267.
Compilation failed in require at shared-scalar line 2.
BEGIN failed--compilation aborted at shared-scalar line 2.
[vk-dev]% perl -V
Summary of my perl5 (revision 5 version 20 subversion 3) configuration:
Platform:
osname=freebsd, osvers=10.2-release-p7, archname=amd64-freebsd-thread-multi
uname='freebsd pkg.kcilink.com 10.2-release-p7 freebsd 10.2-release-p7 amd64 '
config_args='-sde -Dprefix=/usr/local -Dlibperl=libperl.so.5.20.3 -Darchlib=/usr/local/lib/perl5/5.20/mach -Dprivlib=/usr/local/lib/perl5/5.20 -Dman3dir=/usr/local/lib/perl5/5.20/perl/man/man3 -Dman1dir=/usr/local/lib/perl5/5.20/perl/man/man1 -Dsitearch=/usr/local/lib/perl5/site_perl/mach/5.20 -Dsitelib=/usr/local/lib/perl5/site_perl -Dscriptdir=/usr/local/bin -Dsiteman3dir=/usr/local/lib/perl5/site_perl/man/man3 -Dsiteman1dir=/usr/local/lib/perl5/site_perl/man/man1 -Ui_malloc -Ui_iconv -Uinstallusrbinperl -Dusenm=n -Dcc=cc -Duseshrplib -Dinc_version_list=none -Dcf_by=perl -Dcf_email=perl@FreeBSD.org -Dcf_time=Sat Sep 12 19:09:14 UTC 2015 -Alddlflags=-L/var/tmp/usr/ports/lang/perl5.20/work/perl-5.20.3 -L/usr/local/lib/perl5/5.20/mach/CORE -Wl,-rpath=/usr/local/lib/perl5/5.20/mach/CORE -lperl -Dshrpldflags=$(LDDLFLAGS:N-L/var/tmp/usr/ports/lang/perl5.20/work/perl-5.20.3:N-L/usr/local/lib/perl5/5.20/mach/CORE:N-Wl,-rpath=/usr/local/lib/perl5/5.20/mach/CORE:N-lperl) -Wl,-soname,$(LIBPERL:R) -Dotherlibdirs=/usr/local/lib/perl5/site_perl/5.20:/usr/local/lib/perl5/site_perl/5.20/mach -Doptimize=-O2 -pipe -fstack-protector -fno-strict-aliasing -Ui_gdbm -Dusemultiplicity=y -Duse64bitint -Dusethreads=y -Dusemymalloc=n'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include',
optimize='-O2 -pipe -fstack-protector -fno-strict-aliasing',
cppflags='-DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.2.1 Compatible FreeBSD Clang 3.4.1 (tags/RELEASE_34/dot1-final 208032)', 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 ='-lpthread -Wl,-E -fstack-protector -L/usr/local/lib'
libpth=/usr/lib /usr/local/lib /usr/include/clang/3.4.1 /usr/lib
libs=-lpthread -lm -lcrypt -lutil
perllibs=-lpthread -lm -lcrypt -lutil
libc=, so=so, useshrplib=true, libperl=libperl.so.5.20.3
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' -Wl,-R/usr/local/lib/perl5/5.20/mach/CORE'
cccdlflags='-DPIC -fPIC', lddlflags='-shared -L/var/tmp/usr/ports/lang/perl5.20/work/perl-5.20.3 -L/usr/local/lib/perl5/5.20/mach/CORE -Wl,-rpath=/usr/local/lib/perl5/5.20/mach/CORE -lperl -L/usr/local/lib -fstack-protector'
Characteristics of this binary (from libperl):
Compile-time options: HAS_TIMES MULTIPLICITY PERLIO_LAYERS
PERL_DONT_CREATE_GVSV
PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP
PERL_NEW_COPY_ON_WRITE PERL_PRESERVE_IVUV
USE_64_BIT_ALL USE_64_BIT_INT USE_ITHREADS
USE_LARGE_FILES USE_LOCALE USE_LOCALE_COLLATE
USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_PERLIO
USE_PERL_ATOF USE_REENTRANT_API
Built under freebsd
@INC:
/usr/local/lib/perl5/site_perl/mach/5.20
/usr/local/lib/perl5/site_perl
/usr/local/lib/perl5/5.20/mach
/usr/local/lib/perl5/5.20
/usr/local/lib/perl5/site_perl/5.20
/usr/local/lib/perl5/site_perl/5.20/mach
.