-fvisibility-inlines-hidden for x86-darwin builds

[Paolo Carlini]

Howard Hinnant wrote:
> Ok, thanks Benjamin.  Know that I'm stumbling around in the dark with 
> respect to configure, autoconfigure, automake and even make.  I've 
> just received today the book "GNU Autoconf, Automate, and Libtool" on 
> the good advice of Eric Christopher, am reading it, but haven't had 
> time to read much of it yet.
A trivial warning, however: I'm sure that once Phil Edwards, involved in 
the book, told me to be careful with parts of it, because outdated... Or 
a new edition is finally out? Sorry in case.

Paolo.