[openssl-dev] Fixing some warnings when compiling on non-posix systems.

[Juan Manuel Guerrero]

I do not know if someone really cares about this, but I have compiled
openssl-1.0.2-stable-SNAP-20170602 using the DJGPP port of gcc-7.1.0.
The code has been configured using --strict-warnings option.  At least
the following issues have appeared.  Using the DJGPP port of gcc means
that the code is configured and compiled on a non-posix system thus
macros like OPENSSL_SYS_LINUX and FIONBIO are undefined rising warnings
like the fixed ones.  The patch is only intended to show the issue and
how it could be fixed.


Regards,
Juan M. Guerrero



	* crypto/bio/bss_dgram.c (long dgram_ctrl):  warning: variable 'sockopt_val' set but not used [-Wunused-but-set-variable]

	* crypto/bio/b_sock.c (BIO_socket_nbio):  warning: variable 'l' set but not used [-Wunused-but-set-variable]







diff -aprNU5 openssl-1.0.2-stable-SNAP-20170602.orig/crypto/bio/bss_dgram.c openssl-1.0.2-stable-SNAP-20170602/crypto/bio/bss_dgram.c
--- openssl-1.0.2-stable-SNAP-20170602.orig/crypto/bio/bss_dgram.c	2017-06-03 21:36:52 +0000
+++ openssl-1.0.2-stable-SNAP-20170602/crypto/bio/bss_dgram.c	2017-06-03 21:45:22 +0000
@@ -492,12 +492,12 @@ static long dgram_ctrl(BIO *b, int cmd,
  {
      long ret = 1;
      int *ip;
      struct sockaddr *to = NULL;
      bio_dgram_data *data = NULL;
-    int sockopt_val = 0;
  # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
+    int sockopt_val = 0;
      socklen_t sockopt_len;      /* assume that system supporting IP_MTU is
                                   * modern enough to define socklen_t */
      socklen_t addr_len;
      union {
          struct sockaddr sa;
diff -aprNU5 openssl-1.0.2-stable-SNAP-20170602.orig/crypto/bio/b_sock.c openssl-1.0.2-stable-SNAP-20170602/crypto/bio/b_sock.c
--- openssl-1.0.2-stable-SNAP-20170602.orig/crypto/bio/b_sock.c	2017-06-01 20:51:32 +0000
+++ openssl-1.0.2-stable-SNAP-20170602/crypto/bio/b_sock.c	2017-06-03 21:42:30 +0000
@@ -949,14 +949,14 @@ int BIO_set_tcp_ndelay(int s, int on)
  }

  int BIO_socket_nbio(int s, int mode)
  {
      int ret = -1;
+# ifdef FIONBIO
      int l;

      l = mode;
-# ifdef FIONBIO
      ret = BIO_socket_ioctl(s, FIONBIO, &l);
  # endif
      return (ret == 0);
  }
  #endif