_configtest.c:1:5: warning: conflicting types for built-in function ‘rint’; expected ‘double(double)’ [-Wbuiltin-declaration-mismatch]
    1 | int rint (void);
      |     ^~~~
_configtest.c:1:1: note: ‘rint’ is declared in header ‘<math.h>’
  +++ |+#include <math.h>
    1 | int rint (void);
_configtest.c:2:5: warning: conflicting types for built-in function ‘trunc’; expected ‘double(double)’ [-Wbuiltin-declaration-mismatch]
    2 | int trunc (void);
      |     ^~~~~
_configtest.c:2:5: note: ‘trunc’ is declared in header ‘<math.h>’
_configtest.c:3:5: warning: conflicting types for built-in function ‘exp2’; expected ‘double(double)’ [-Wbuiltin-declaration-mismatch]
    3 | int exp2 (void);
      |     ^~~~
_configtest.c:3:5: note: ‘exp2’ is declared in header ‘<math.h>’
_configtest.c:4:5: warning: conflicting types for built-in function ‘log2’; expected ‘double(double)’ [-Wbuiltin-declaration-mismatch]
    4 | int log2 (void);
      |     ^~~~
_configtest.c:4:5: note: ‘log2’ is declared in header ‘<math.h>’
_configtest.c:5:5: warning: conflicting types for built-in function ‘atan2’; expected ‘double(double,  double)’ [-Wbuiltin-declaration-mismatch]
    5 | int atan2 (void);
      |     ^~~~~
_configtest.c:5:5: note: ‘atan2’ is declared in header ‘<math.h>’
_configtest.c:6:5: warning: conflicting types for built-in function ‘pow’; expected ‘double(double,  double)’ [-Wbuiltin-declaration-mismatch]
    6 | int pow (void);
      |     ^~~
_configtest.c:6:5: note: ‘pow’ is declared in header ‘<math.h>’
_configtest.c:7:5: warning: conflicting types for built-in function ‘nextafter’; expected ‘double(double,  double)’ [-Wbuiltin-declaration-mismatch]
    7 | int nextafter (void);
      |     ^~~~~~~~~
_configtest.c:7:5: note: ‘nextafter’ is declared in header ‘<math.h>’
_configtest.c:10:5: warning: conflicting types for built-in function ‘cbrt’; expected ‘double(double)’ [-Wbuiltin-declaration-mismatch]
   10 | int cbrt (void);
      |     ^~~~
_configtest.c:10:5: note: ‘cbrt’ is declared in header ‘<math.h>’