[...]

md5.c:236:2: note: in expansion of macro 'MD5STEP'
  MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
  ^
md5.c:145:26: warning: left-hand operand of comma expression has no effect [-Wunused-value]
  ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
                          ^
md5.c:237:2: note: in expansion of macro 'MD5STEP'
  MD5STEP(F4, a, b, c, d, in[4 ] + 0xf7537e82,  6);
  ^
md5.c:145:26: warning: left-hand operand of comma expression has no effect [-Wunused-value]
  ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
                          ^
md5.c:238:2: note: in expansion of macro 'MD5STEP'
  MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
  ^
md5.c:145:26: warning: left-hand operand of comma expression has no effect [-Wunused-value]
  ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
                          ^
md5.c:239:2: note: in expansion of macro 'MD5STEP'
  MD5STEP(F4, c, d, a, b, in[2 ] + 0x2ad7d2bb, 15);
  ^
md5.c:145:26: warning: left-hand operand of comma expression has no effect [-Wunused-value]
  ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
                          ^
md5.c:240:2: note: in expansion of macro 'MD5STEP'
  MD5STEP(F4, b, c, d, a, in[9 ] + 0xeb86d391, 21);
  ^
md5.c:155:24: warning: unused variable 'in' [-Wunused-variable]
  u_int32_t a, b, c, d, in[MD5_BLOCK_LENGTH / 4];
                        ^
md5.c: At top level:
md5.c:40:17: warning: 'PADDING' defined but not used [-Wunused-variable]
 static u_int8_t PADDING[MD5_BLOCK_LENGTH] = {
                 ^
make[1]: *** [libcompat_la-md5.lo] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory `/home/users/builder/rpm/BUILD/openntpd-5.7p4/compat'
make: *** [all-recursive] Error 1
error: Bad exit status from /tmp/B.7530e8/rpm-tmp.17728 (%build)
RPM build errors:
    Bad exit status from /tmp/B.7530e8/rpm-tmp.17728 (%build)
ended at: Tue Jul 28 13:52:16 2015, done in 01days 00h 00m 21s
error: No files produced.
mesg: ttyname failed: Inappropriate ioctl for device
Begin-PLD-Builder-Info
Build-Time: user:16.20s sys:13.13s real:26.00s (faults io:0 non-io:1052405)
End-PLD-Builder-Info