Fishy build system: make_exports.pl called on darwin?

[Marcin Dalecki]

On 2005-10-02, at 23:45, Paolo Bonzini wrote:

> 2) Why do you think that symbol versioning is exclusive to glibc?

I don't. I look at the the results of it.

> 3) You can of course think that glibc is evil, but how is it related?

Oh no... I got just immersed by the GLIBCXX prefixing over there and  
guessed that it's related to the glibc instead of the GNU-libstdc++  
name. Argh.

> 4) Who in their right minds would add glibc-specific code naming it  
> ENABLE_SYMVERS_DARWIN_EXPORT (*darwin*)?

Same answer as to 3).

>> I'm right now not in the mood to dive myself in to the non- 
>> formal,  fragile, how to waste time chasing broken by design  
>> system, world of  autoconf/automake.
>
> 5) Can you suggest any better alternative?  We are all ears.

FreeBSD at least manages much of an paralell build system. A  
declarative system, which doesn't rely that much on host system  
testing would be helpfull and much easier to handle. I'm quite  
convinced that it would require right now far less effort to maintain  
then what is spend overall on the autoxxxx stuff.

> 6) Is this whining reporting significant information, for the  
> person that wants to fix the bug?

Well on the system in question ppc-apple-darwin-7.8.0 the perl script  
in question simply doesn't work. Since there doesn't appear to be  
much in the way of it inside acinclude.m4 it appears that setting  
unconditionally enable_symvers inside the following:

# Turn a 'yes' into a suitable default.
if test x$enable_symvers = xyes ; then
   if test $enable_shared = no ||
      test "x$LD" = x ; then
     enable_symvers=no
   elif test $with_gnu_ld == yes ; then
     enable_symvers=gnu
   else
     case ${target_os} in
       darwin*)
     enable_symvers=darwin-export ;;
       *)
       AC_MSG_WARN([=== You have requested some kind of symbol  
versioning, but])
       AC_MSG_WARN([=== you are not using a supported linker.])
       AC_MSG_WARN([=== Symbol versioning will be disabled.])
     enable_symvers=no ;;
     esac
   fi
fi

seems to be not quite right.