[perl #52572] Unwanted warning from XS BOOT

# New Ticket Created by  "Sisyphus" 
# Please include the string:  [perl #52572]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=52572 >


This is a bug report for perl from sisyphus1@optusnet.com.au ,
generated with the help of perlbug 1.36 running under perl 5.10.0.


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[Please enter your report here]

With perl-5.10.0 (and later), the following demo script produces the 
warning:
Name "main::x" used only once: possible typo at C:/perl/lib/DynaLoader.pm 
line 224.

This happens only if global warnings ($^W) are turned on. Since the perl 
code in the demo script makes no mention of $x, I'm wondering whether this 
warning should be produced at all. (The fact that the warning specifies line 
224 of DynaLoader.pm is also a little misleading.)

Here's the demo:

use Inline C => Config =>
    BOOT => 'sv_setiv(get_sv("main::x", 1), 17);';

use Inline C=> <<'EOC';

void greet() {
    printf("Hello World\n");
}

EOC

greet();

This behaviour becomes annoying when, for example, one runs 'make test' for 
PDL (where $PDL::SHARE has been created as per the method demo'd above, in 
case it is ever needed) and sees the following warning issued for every test 
file that is run:

Name "PDL::SHARE" used only once: possible typo at C:/perl/lib/DynaLoader.pm 
line 226.

Is this something that should be addressed from within the perl source, or 
should we be looking at amending the PDL source ?

Cheers,
Rob

[Please do not change anything below this line]
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---
Flags:
    category=core
    severity=medium
---
Site configuration information for perl 5.10.0:

Configured by Rob at Sat Feb  9 11:01:04 2008.

Summary of my perl5 (revision 5 version 10 subversion 0) configuration:
  Platform:
    osname=MSWin32, osvers=6.0, archname=MSWin32-x64-multi-thread
    uname=''
    config_args='undef'
    hint=recommended, useposix=true, d_sigaction=undef
    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='gcc', ccflags 
' -s -O2 -DWIN32 -DHAVE_DES_FCRYPT -D__NO_ISOCEXT  -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS 
 -fno-strict-aliasing -DPERL_MSVCRT_READFIX',
    optimize='-s -O2',
    cppflags='-DWIN32'
    ccversion='', gccversion='3.4.5', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=undef, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='long long', 
lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='g++', ldflags 
='-s -L"c:\perl510_M\5.10.0\lib\CORE" -L"C:\home\rob\mingw_vista\i686-pc-mingw32\lib"'
    libpth=C:\home\rob\mingw_vista\i686-pc-mingw32\lib
    libs=-lmsvcrt -lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32 
 -ladvapi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr -lwinmm 
 -lversion -lodbc32 -lodbccp32
    perllibs=-lmsvcrt -lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32 
 -ladvapi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr -lwinmm 
 -lversion -lodbc32 -lodbccp32
    libc=-lmsvcrt, so=dll, useshrplib=true, libperl=libperl510.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', 
lddlflags='-mdll -s -L"c:\perl510_M\5.10.0\lib\CORE" -L"C:\home\rob\mingw_vista\i686-pc-mingw32\lib"'

Locally applied patches:


---
@INC for perl 5.10.0:
    C:/perl510_M/5.10.0/lib
    C:/perl510_M/site/5.10.0/lib
    .

---
Environment for perl 5.10.0:
    HOME (unset)
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=C:\Program Files\Windows 
NT\Accessories;C:\_32\third_party_app;C:\GNUWin32\bin;C:\perl510_M\5.10.0\bin;C:\_32\dmake;C:\home\rob\mingw_vista\i686-pc-mingw32\bin;c:\ruby\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\batch;C:\_32\msys\1.0\bin
    PERL_BADLANG (unset)
    SHELL (unset)

• [perl #52572] Unwanted warning from XS BOOT by Sisyphus
• Re: [perl #52572] Unwanted warning from XS BOOT by Robert May
• Re: [perl #52572] Unwanted warning from XS BOOT by Sisyphus