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[perl #55550] 'once' warnings from xs modules in perl 5.10.0

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From:
Chia-liang Kao
Date:
June 9, 2008 23:19
Subject:
[perl #55550] 'once' warnings from xs modules in perl 5.10.0
Message ID:
rt-3.6.HEAD-18229-1213073483-329.55550-75-0@perl.org
# New Ticket Created by  Chia-liang Kao 
# Please include the string:  [perl #55550]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=55550 >


This is a bug report for perl from clkao@bestpractical.com,
generated with the help of perlbug 1.39 running under perl 5.10.0.


-----------------------------------------------------------------
[Please describe your issue here]

I noticed that in perl 5.10 i get an 'once' warning if i load an xs  
module who does a get_sv in boot.
Specifically this is the Subversion perl bindings generated by swig.

I wonder if it makes sense for that warning to come out from an xs  
module which supposedly knows what it is doing ?  in that case the  
following patch would silent the warnings from dynaloader. might need  
the similar fix to xsloader if this is the sane way to do it.


--- perl510.orig/ext/DynaLoader/DynaLoader.pm  2008-06-06  
20:11:29.000000000 +0800
+++ perl510/ext/DynaLoader/DynaLoader.pm       2008-06-06  
22:06:44.000000000 +0800
@@ -226,6 +226,7 @@
     # See comment block above

        push(@dl_shared_objects, $file); # record files loaded
+       no warnings 'once';

     &$xs(@args);
}

[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
     category=core
     severity=medium
---
This perlbug was built using Perl 5.10.0 - Sat May 31 12:52:22 EDT 2008
It is being executed now by  Perl 5.10.0 - Tue Jun  3 15:34:03 CST 2008.

Site configuration information for perl 5.10.0:

Configured by clkao at Tue Jun  3 15:34:03 CST 2008.

Summary of my perl5 (revision 5 version 10 subversion 0) configuration:
   Platform:
     osname=darwin, osvers=9.2.2, archname=darwin-thread-multi-2level
     uname='darwin mtl.local 9.2.2 darwin kernel version 9.2.2: tue  
mar 4 21:17:34 pst 2008; root:xnu-1228.4.31~1release_i386 i386 i386 '
     config_args='-Dprefix=/Users/clkao/perl5.10 -DDEBUGGING - 
Duseithreads -d'
     hint=recommended, useposix=true, d_sigaction=define
     useithreads=define, usemultiplicity=define
     useperlio=define, d_sfio=undef, uselargefiles=define,  
usesocks=undef
     use64bitint=undef, use64bitall=undef, uselongdouble=undef
     usemymalloc=n, bincompat5005=undef
   Compiler:
     cc='cc', ccflags ='-fno-common -DPERL_DARWIN -no-cpp-precomp - 
DDEBUGGING -fno-strict-aliasing -pipe -I/usr/local/include -I/opt/ 
local/include',
     optimize='-O3 -g',
     cppflags='-no-cpp-precomp -fno-common -DPERL_DARWIN -no-cpp- 
precomp -DDEBUGGING -fno-strict-aliasing -pipe -I/usr/local/include -I/ 
opt/local/include'
     ccversion='', gccversion='4.0.1 (Apple Inc. build 5465)',  
gccosandvers=''
     intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
     d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
     ivtype='long', ivsize=4, nvtype='double', nvsize=8,  
Off_t='off_t', lseeksize=8
     alignbytes=8, prototype=define
   Linker and Libraries:
     ld='env MACOSX_DEPLOYMENT_TARGET=10.3 cc', ldflags =' -L/usr/ 
local/lib -L/opt/local/lib'
     libpth=/usr/local/lib /opt/local/lib /usr/lib
     libs=-ldbm -ldl -lm -lutil -lc
     perllibs=-ldl -lm -lutil -lc
     libc=/usr/lib/libc.dylib, so=dylib, useshrplib=false,  
libperl=libperl.a
     gnulibc_version=''
   Dynamic Linking:
     dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
     cccdlflags=' ', lddlflags=' -bundle -undefined dynamic_lookup -L/ 
usr/local/lib -L/opt/local/lib'

Locally applied patches:
     DEVEL

---
@INC for perl 5.10.0:
     /Users/clkao/perl5.10/lib/5.10.0/darwin-thread-multi-2level
     /Users/clkao/perl5.10/lib/5.10.0
     /Users/clkao/perl5.10/lib/site_perl/5.10.0/darwin-thread- 
multi-2level
     /Users/clkao/perl5.10/lib/site_perl/5.10.0
     .

---
Environment for perl 5.10.0:
     DYLD_LIBRARY_PATH (unset)
     HOME=/Users/clkao
     LANG (unset)
     LANGUAGE (unset)
     LD_LIBRARY_PATH (unset)
     LOGDIR (unset)
     PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/ 
opt/local/bin:/opt/local/sbin
     PERL_BADLANG (unset)
     SHELL=/bin/bash



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