[CVS gcc toplevel patch] v2 + v3, --enable-libstdcxx-v3

[Jason Merrill]

>>>>> Benjamin Kosnik <bkoz@cygnus.com> writes:

 >> Configuring with --enable-libstdcxx-v3 should change the default for
 >> -fhonor-std, not just how libgcc is built; otherwise, if the user forgets
 >> to specify -fhonor-std, her code won't link.

 > I agree that this is preferable. I just am unsure as to how it can be done. 
 > I'm trying to match the behavior of --enable-new-gxx-abi, which also only 
 > sets flags for libgcc.a compilation instead of actually changing the 
 > compiler defaults. 

Which is probably also a mistake.

 > . . . . the only idea I have is to change decl2.c to

 > int flag_honor_std = _GPP_ENABLE_NAMESPACES;

 > from 

 > int flag_honor_std;

 > And then AC_DEFINE(_GPP_ENABLE_NAMESPACES) in gcc/configure.in when 
 > --enable-libstdcxx-v3 is called. Hmm. 

I'd prefer the less misleading "ENABLE_STD_NAMESPACE".  It should
definitely not have a leading underscore.

Jason