[perl #79674] [PATCH] Add mro::get_linear_isa to mro.c to make overload.pm lighter

# New Ticket Created by  "Jerry D. Hedden" 
# Please include the string:  [perl #79674]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=79674 >


This is a bug report for perl from jdhedden@cpan.org,
generated with the help of perlbug 1.39 running under perl 5.13.7.

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

overload.pm does 'require mro' so that it can access the
mro::get_linear_isa() function.  This basically means that
anytime overload is used, the XS module for mro gets loaded
as well.

mro.c already has a version of get_linear_isa that can be used
by overload.pm without having to do a 'require mro'.  The attached
patch adds mro::get_linear_isa to the boot section of mro.c.

The patch also removes the 'require mro' from overload.pm, bumps
its version, and also removes a 'require mro' from t/op/universal.t


[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
    category=core
    severity=low
---
Site configuration information for perl 5.13.7:

Configured by Jerry at Mon Nov 22 12:37:38 EST 2010.

Summary of my perl5 (revision 5 version 13 subversion 7 patch 43865)
configuration:
  Snapshot of: 57fc91ac6f784443b7664e2bd192c2cc3813e50e
  Platform:
    osname=cygwin, osvers=1.5.25(0.15642), archname=cygwin-thread-multi-64int
    uname='cygwin_nt-5.1 pn100-02-2-364p 1.5.25(0.15642) 2008-06-12
19:34 i686 cygwin '
    config_args='-de -Duse64bitint -Dusethreads -Dusedevel
-Dversiononly=no -Dinstallusrbinperl -Uusemallocwrap
-Dinc_version_list=none -Dnoextensions=Devel/DProf Devel/Peek
Filter/Util/Call GDBM_File Hash/Util/FieldHash I18N/Langinfo IPC/SysV
Math/BigInt/FastCalc NDBM_File ODBM_File Sys/Syslog Text/Soundex
Time/Piece Unicode/Normalize attrs re Archive/Extract Archive/Tar
Attribute/Handlers B/Debug B/Lint Class/ISA CGI CPANPLUS
CPANPLUS/Dist/Build Devel/SelfStubber Digest File/Fetch FileCache
Filter/Simple I18N/LangTags IO/Zlib IPC/Cmd IPC/Open2 Locale/Codes
Locale/Maketext Locale/Maketext/Simple Log/Message Log/Message/Simple
Math/BigInt Math/BigRat Math/Complex Memoize Module/Build
Module/CoreList Module/Load Module/Load/Conditional Module/Loaded
Module/Pluggable NEXT Object/Accessor Package/Constants Params/Check
Parse/CPAN/Meta PerlIO/via/QuotedPrint Pod/Html Pod/LaTeX Pod/Plainer
SelfLoader Switch Term/UI Text/Balanced Tie/File Tie/Memoize
Unicode/Collate autodie autouse bignum encoding/warnings -A
append:ccflags= -DNO_MATHOMS -A define:optimize=-Os -pipe
-funit-at-a-time -march=pentium4 -mfpmath=sse -mieee-fp -mmmx -msse
-msse2'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=undef, uselongdouble=undef
    usemymalloc=y, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__
-DNO_MATHOMS -fno-strict-aliasing -pipe',
    optimize='-Os -pipe -funit-at-a-time -march=pentium4 -mfpmath=sse
-mieee-fp -mmmx -msse -msse2',
    cppflags='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -DNO_MATHOMS
-fno-strict-aliasing -pipe'
    ccversion='', gccversion='3.4.4 (cygming special, gdc 0.12, using
dmd 0.125)', 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=8, prototype=define
  Linker and Libraries:
    ld='g++', ldflags =' -Wl,--enable-auto-import
-Wl,--export-all-symbols -Wl,--stack,8388608
-Wl,--enable-auto-image-base -s -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib /lib
    libs=-lgdbm -ldl -lcrypt -lgdbm_compat
    perllibs=-ldl -lcrypt
    libc=/usr/lib/libc.a, so=dll, useshrplib=true, libperl=cygperl5_13_7.dll
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' -s'
    cccdlflags=' ', lddlflags=' --shared  -Wl,--enable-auto-import
-Wl,--export-all-symbols -Wl,--stack,8388608
-Wl,--enable-auto-image-base -s -L/usr/local/lib'

Locally applied patches:


---
@INC for perl 5.13.7:
    /usr/lib/perl5/site_perl/5.13.7/cygwin
    /usr/lib/perl5/site_perl/5.13.7
    /usr/lib/perl5/5.13.7/cygwin
    /usr/lib/perl5/5.13.7
    .

---
Environment for perl 5.13.7:
    CYGWIN=ntsec
    HOME=/home/jhedden
    LANG=C
    LANGUAGE=C
    LC_ALL=C
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/jhedden/bin:/usr/local/src/perl/bin:/link/work/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/c/Program
Files/WiX:/c/djgpp/bin:/c/bb/tools/apache-ant-1.6.5/bin:/c/Program
Files/nant-0.85/bin:/c/bb/tools/jse5/bin:/c/dev-cpp/bin:/c/WINDOWS/system32:/c/WINDOWS:/c/WINDOWS/system32/WBEM:/c/blp/API/dde:/c/blp/API:/c/oracle/ora92/bin:/c/Program
Files/Oracle/jre/1.3.1/bin:/c/Program
Files/Oracle/jre/1.1.8/bin:/c/Program
Files/Hummingbird/Connectivity/7.10/Accessories:/usr/bin:/c/Program
Files/Windows Imaging/:/c/Program Files/Citrix/ICAService/:/c/Program
Files/Citrix/System32/:.
    PERLIO=perlio
    PERL_BADLANG (unset)
    SHELL (unset)

• [perl #79674] [PATCH] Add mro::get_linear_isa to mro.c to make overload.pm lighter by Jerry D. Hedden
• Re: [perl #79674] [PATCH] Add mro::get_linear_isa to mro.c to makeoverload.pm lighter by Eric Brine
• Re: [perl #79674] [PATCH] Add mro::get_linear_isa to mro.c to make overload.pm lighter by Nicholas Clark
• Re: [perl #79674] [PATCH] Add mro::get_linear_isa to mro.c to makeoverload.pm lighter by Jerry D. Hedden
• Re: [perl #79674] [PATCH] Add mro::get_linear_isa to mro.c to make overload.pm lighter by Nicholas Clark
• Re: [perl #79674] [PATCH] Add mro::get_linear_isa to mro.c to makeoverload.pm lighter by Zefram