Re: max_align_t from libgnu/stddef.h conflicts with gcc 5.3.1

[Paul Eggert]

I'm not observing the problem on Fedora 23 with gcc (GCC) 5.3.1 20151207 (Red 
Hat 5.3.1-2).

Can you reproduce the problem this way?

./gnulib-tool --dir foo --create-testdir unistd
cd foo
./configure
make
make check

As I understand it, GCC 5.3.1 should not need a substitute stddef.h. So if your 
system is creating one, you need to figure out why ./configure decided that 
stddef.h wasn't working. Look in config.log; it should say something like this:

configure:7608: checking for max_align_t
[ a lot of chatter ]
configure:7608: result: yes