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Posted to modperl@perl.apache.org by Marc Tardif <ma...@sitepak.com> on 2005/11/02 22:53:53 UTC

undefined symbol: perl_get_cv

I am trying to compile mod_perl-2.0.2 with httpd-2.0.55. These are the 
compilation options I used for mod_perl:

   # perl Makefile.PL MP_APXS=/path/to/bin/apxs

When finished compiling and installing, this is the error message I get 
when attempting to start httpd:

   Syntax error on line 235 of /path/to/etc/apache/httpd.conf:
   Cannot load /path/to/modules/mod_perl.so into server:
     /path/to/modules/mod_perl.so: undefined symbol: perl_get_cv

Of course, line 235 of httpd.conf loads the mod_perl module:

   LoadModule perl_module        modules/mod_perl.so

When I run ldd on mod_perl.so, I get the following dynamic libraries:

   # ldd /path/to/modules/mod_perl.so
         libperl.so => 
/path/to/lib/perl5/5.6.1/i686-linux/CORE/libperl.so (0x002e8000)
         libnsl.so.1 => /lib/libnsl.so.1 (0x00e89000)
         libdl.so.2 => /lib/libdl.so.2 (0x00413000)
         libm.so.6 => /lib/i686/libm.so.6 (0x00888000)
         libc.so.6 => /lib/i686/libc.so.6 (0x00654000)
         libcrypt.so.1 => /lib/libcrypt.so.1 (0x00f68000)
         libutil.so.1 => /lib/libutil.so.1 (0x00111000)
         /lib/ld-linux.so.2 (0x00a1e000)

And then, when I run nm on libperl.so, I get the following symbol:

   # nm /path/to/lib/perl5/5.6.1/i686-linux/CORE/libperl.so \
     | grep -i perl_get_cv
   0001cbe4 T Perl_get_cv

So, there seems to be a discrepancy between the expected case in the 
perl library. I noticed other people have encountered the same problem 
on this mailing list and the proposed solution was to add the 
EVERYTHING=1 argument when configuring mod_perl. I have tried adding 
this argument but to no avail. Can anyone propose another solution?

-- 
Marc Tardif
Sitepak

Re: undefined symbol: perl_get_cv

Posted by "Philip M. Gollucci" <pg...@p6m7g8.com>.
Marc Tardif wrote:
> I am trying to compile mod_perl-2.0.2 with httpd-2.0.55. These are the 
> compilation options I used for mod_perl:
What OS and perl -V ?

> 
>   # perl Makefile.PL MP_APXS=/path/to/bin/apxs
Good

>   Syntax error on line 235 of /path/to/etc/apache/httpd.conf:
>   Cannot load /path/to/modules/mod_perl.so into server:
>     /path/to/modules/mod_perl.so: undefined symbol: perl_get_cv
EWWW

> 
> Of course, line 235 of httpd.conf loads the mod_perl module:
> 
>   LoadModule perl_module        modules/mod_perl.so
Good

>   # ldd /path/to/modules/mod_perl.so
>         libperl.so => 
> /path/to/lib/perl5/5.6.1/i686-linux/CORE/libperl.so (0x002e8000)
>         libnsl.so.1 => /lib/libnsl.so.1 (0x00e89000)
>         libdl.so.2 => /lib/libdl.so.2 (0x00413000)
>         libm.so.6 => /lib/i686/libm.so.6 (0x00888000)
>         libc.so.6 => /lib/i686/libc.so.6 (0x00654000)
>         libcrypt.so.1 => /lib/libcrypt.so.1 (0x00f68000)
>         libutil.so.1 => /lib/libutil.so.1 (0x00111000)
>         /lib/ld-linux.so.2 (0x00a1e000)
Oooh 5.6.1....
http://perl.apache.org/docs/2.0/user/install/install.html#Prerequisites

Make sure your mpm, perl threads, and apr threads are correct in a useable 
combination.

> 
> And then, when I run nm on libperl.so, I get the following symbol:
> 
>   # nm /path/to/lib/perl5/5.6.1/i686-linux/CORE/libperl.so \
>     | grep -i perl_get_cv
>   0001cbe4 T Perl_get_cv
In perl 5.6.2 source:
gerp -i perl_get_cv *
embed.pl:#  define  Perl_get_cv                 perl_get_cv

in mp2, this function is never called regardless of case.

> EVERYTHING=1 argument when configuring mod_perl. I have tried adding 
> this argument but to no avail. Can anyone propose another solution?
This is an mp1 Makefile.PL argument and will do nothing in mod_perl 2.


-- 
END
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Philip M. Gollucci (pgollucci@p6m7g8.com) 301.254.5198
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