unable to upgrade apache2 on snow leopard

[Ryan Schmidt]

On Sep 15, 2009, at 11:59, David Evans wrote:

>> libtool: compile: unable to infer tagged configuration
>> libtool: compile: specify a tag with `--tag'
>
> I got this error when building exiv2 on Leopard.  It persisted
> for months until I did a forced clean and reinstall of libtool.

Yes, it sounds like the compiler used to build libtool is not the same  
compiler that was used to build the program you're building now (e.g.  
apache2). This is likely if you're upgrading, since libtool will have  
been built with /usr/bin/gcc-4.0 but you are now trying to build  
apache2 with /usr/bin/gcc-4.2. Maybe we need to specially mention  
libtool in the Migration page as well.