gmp-6.3.0/OSX10.13: configure error

[andreas]

Hi,
I am getting configure error for ./configure :

configure: error: could not find a working compiler, see config.log for 
details

The failed program is:

/* The following provokes a segfault in the compiler on 
powerpc-apple-darwin.
    Extracted from tests/mpn/t-iord_u.c.  Causes Apple's gcc 3.3 build 
1640 and
    1666 to segfault with e.g., -O2 -mpowerpc64.  */

#if defined (__GNUC__) && ! defined (__cplusplus)
typedef unsigned long long t1;typedef t1*t2;
void g(){}
void h(){}
static __inline__ t1 e(t2 rp,t2 up,int n,t1 v0)
{t1 c,x,r;int 
i;if(v0){c=1;for(i=1;i<n;i++){x=up[i];r=x+1;rp[i]=r;}}return c;}
void f(){static const struct{t1 n;t1 src[9];t1 
want[9];}d[]={{1,{0},{1}},};t1 got[9];int i;
for(i=0;i<1;i++){if(e(got,got,9,d[i].n)==0)h();g(i,d[i].src,d[i].n,got,d[i].want,9);if(d[i].n)h();}}
#else
int dummy;
#endif

int main () { return 0; }

configure:7072: result: no, long long reliability test 1
configure:7310: error: could not find a working compiler, see config.log 
for details

Before I submit my details with config.log I ask:
is defining void g(){} and then calling 
g(i,d[i].src,d[i].n,got,d[i].want,9) on purpose or is this a bug?

This is where the configure test program fails.
thank you