/export/home/briggs/amiga-gcc/projects/binutils/bfd/aout-amiga.c:51:8: error: unknown type name ‘PTR’
   51 | extern PTR alloca PARAMS ((size_t));
      |        ^~~
/export/home/briggs/amiga-gcc/projects/binutils/bfd/aout-amiga.c:51:12: warning: conflicting types for built-in function ‘alloca’; expected ‘void *(long unsigned int)’ [-Wbuiltin-declaration-mismatch]
   51 | extern PTR alloca PARAMS ((size_t));
      |            ^~~~~~
make[4]: *** [Makefile:1761: aout-amiga.lo] Error 1
make binutils bfd...failed

#ifndef alloca
extern PTR alloca PARAMS ((size_t));
#endif

2021-04-05  Alan Modra  <amodra@gmail.com>

        * configure.ac: Don't check for long long or long double type.
        Don't check for alloca.h, limits.h, stddef.h, stdlib.h, string.h,
        strings.h, time.h, wchar.h, wctype.h or sys/time.h.  Don't check
        for strtoull, free, malloc, realloc, getenv, strstr, snprintf,
        vsnprintf, strlen or setitimer.  Sort AC_CHECK_DECLS.