The default C++ headers install place

[Mark Mitchell]

Ian Lance Taylor wrote:

> http://gcc.gnu.org/ml/libstdc++/2006-06/msg00053.html
> 
> You are quite right that doc/install.texi was not updated to correct the
> documented default. 

The logic is:

if test x${gcc_gxx_include_dir} = x; then
  if test x${enable_version_specific_runtime_libs} = xyes; then
    gcc_gxx_include_dir='${libsubdir}/include/c++'
  else
    libstdcxx_incdir='include/c++/$(version)'
    if test x$host != x$target; then
       libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
    fi

gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir\
"
  fi
fi

Do we want to try to describe all that?  It seems pretty obscure.

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713