libtool for shared objects?

[Ralf Wildenhues]

* Basile STARYNKEVITCH wrote on Wed, Mar 12, 2008 at 07:57:33AM CET:
> So I tried to add to gcc/configure.ac the following lines (which exist  
> in libmudflap/configure.ac)
>
>   AC_LIBTOOL_DLOPEN
>   AM_PROG_LIBTOOL
>   AC_SUBST(enable_shared)
>   AC_SUBST(enable_static)
>
> and it does not work:
>
> (cd /usr/src/Lang/basile-melt-gcc/gcc && autoconf)
> configure.ac:434: error: possibly undefined macro: AC_LIBTOOL_DLOPEN
>       If this token and others are legitimate, please use m4_pattern_allow.
>       See the Autoconf documentation.
> configure.ac:435: error: possibly undefined macro: AM_PROG_LIBTOOL
> (cd /usr/src/Lang/basile-melt-gcc/gcc && autoheader)

You would need to run
  aclocal -I .. -I ../config

first.  But really it'd be better if you put libtool-using code outside
of gcc/, I think.

Cheers,
Ralf