libstdc++ problem with ExtUtils::MakeMaker

sherlock@genome.stanford. · *nix forums beginner Joined: 20 Jul 2006 Posts: 3

Hi,

The GO::TermFinder modules
(http://search.cpan.org/dist/GO-TermFinder/), which I wrote, often seem
to have problems (platform dependent) when doing the make step,
specifically compiling the swig code in the 'native' directory. The
Makefile.PL in that directory has:

'LIBS' => ['-lm -lstdc++'],

but when the make is run, I see a complaint:

Note (probably harmless): No library found for -lstdc++

which later results in failures like:

# 'Can't load
'/Users/sherlock/dev/GO-TermFinder/blib/arch/auto/GO/TermFinder/Native/Native.bundle'
for module GO::TermFinder::Native:
dlopen(/Users/sherlock/dev/GO-TermFinder/blib/arch/auto/GO/TermFinder/Native/Native.bundle,
2): Symbol not found: __ZSt18_Rb_tree_decrementPSt18_Rb_tree_node_base

during the make test phase. If however, I look at the generated
Makefile in the native directory, I see:

LDLOADLIBS = -lm

if I change this to:

LDLOADLIBS = -lm -lstdc++

and redo the make, the problem is fixed. It is of course annoying to
tell people they may need to hand-edit make files during the
installation process. Does anyone know what I'm doing wrong in the
Makefile.PL file that might remedy the problem?

In this example, I was running Perl 5.8.8 on OSX 10.4.7, with
ExtUtils::MakeMaker 6.17 - I have seen this exact same problem on other
platforms though,

Many thanks in advance,
Gavin

Sisyphus · *nix forums Guru Joined: 04 Mar 2005 Posts: 503

<sherlock@genome.stanford.edu> wrote in message
news:1153358349.380043.115680@75g2000cwc.googlegroups.com...

sherlock@genome.stanford. · *nix forums beginner Joined: 20 Jul 2006 Posts: 3

Hi Rob,

Thanks for the reply. Using :

perl -e 'require ExtUtils::Liblist; ExtUtils::Liblist->ext("-lstdc++",
1, 1);'

I get:

Potential libraries are '-lstdc++':
stdc++ not found in /usr/local/lib
stdc++ not found in /usr/lib
Note (probably harmless): No library found for -lstdc++

poking around in /usr/lib, I see:

libstdc++-static.a
libstdc++.6.0.3.dylib*
libstdc++.6.0.4.dylib*
libstdc++.6.dylib@ -> libstdc++.6.0.4.dylib

but this is where my ignorance prevents me from knowing if this is what
I'm looking for. Poking around a little further, there is also:

/usr/lib/gcc/powerpc-apple-darwin8/4.0.1/libstdc++.dylib

which probably is what I want, and the compiler seems to know how to
find when given the -lstdc++ flag, but MakeMaker doesn't know how to
find, so won't provide the flag (in fact this is a link to
libstdc++.6.dylib back in the /usr/lib directory).

I'll also try asking the unix porting group over on the Apple pages,

Cheers,
Gavin

Sisyphus wrote:

sherlock@genome.stanford. · *nix forums beginner Joined: 20 Jul 2006 Posts: 3

The answer I got on the MacOSX porting list was:

Sisyphus · *nix forums Guru Joined: 04 Mar 2005 Posts: 503

<sherlock@genome.stanford.edu> wrote in message
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