Re: Error compiling bison 3.4.2 on Solaris

[Paul Eggert]

On 10/22/19 11:08 PM, Akim Demaille wrote:

> /opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.2.0/include-fixed/os/base.h
> ...
> #ifndef __has_builtin
> #define __has_builtin(x) 0
> #endif
rg/bugzilla/show_bug.cgi?id=66970
> ... GCC folks want to emulate that compiler.  By emasculating theirs.

Actually, the GCC installation procedure derives its os/base.h from 
macOS's, so this problem is due to Apple: they don't particularly want 
you to use GCC, and they are in effect emasculating GCC in their 
<os/base.h>.

Thanks for diagnosing the problem. I installed a patch into Gnulib which 
I hope fixes it:

https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=f5756b919addb9e8ce03f4e61a10e4fcff14874a

and propagated that patch into Bison master. Please give it a try 
without the -W workarounds; if that works, we can remove the -W 
workarounds for Bison.