[PATCH INSTALLED]: const typedefs part 19/N

[Eric Botcazou]

> You can use older gcc to provide a C++ compiler.  We already require a ISO
> C compiler which for example HP-UX doesn't provide.  I also only want to
> force this for stage1 (that is, development stage 1), not for any released
> compiler, unless, of course, we start using C++ in the middle-end.

People (like me) test the compiler during stage 1 on non-GNU platforms,
while they mainly develop on Linux.  Please don't make it more cumbersome to 
do so on these platforms.  And, yes,  requiring GMP or MPFR for the C 
compiler is highly questionable on my opinion.

--
Eric Botcazou