sim: dv-sockser: enable for mingw targets too

We have enough functionality from gnulib now to build sockser on
all platforms.

Non-blocking I/O is supported when F_GETFL/F_SETFL are unavailable,
but we can address that in a follow up commit.  This mirrors what
is done in other places in the sim already.

sim/common/dv-sockser.c

@@ -40,10 +40,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <sys/select.h>
 #include <sys/socket.h>
 
-#ifndef __CYGWIN32__
-#include <netinet/tcp.h>
-#endif
-
 #include "sim-main.h"
 #include "sim-assert.h"
 #include "sim-options.h"
@@ -198,6 +194,7 @@ dv_sockser_init (SIM_DESC sd)
 
   /* Handle writes to missing client -> SIGPIPE.
      ??? Need a central signal management module.  */
+#ifdef SIGPIPE
   {
     RETSIGTYPE (*orig) ();
     orig = signal (SIGPIPE, SIG_IGN);
@@ -205,6 +202,7 @@ dv_sockser_init (SIM_DESC sd)
     if (orig != SIG_DFL && orig != SIG_IGN)
       signal (SIGPIPE, orig);
   }
+#endif
 
   return SIM_RC_OK;
 }
@@ -276,6 +274,7 @@ connected_p (SIM_DESC sd)
     return 0;
 
   /* Set non-blocking i/o.  */
+#ifdef F_GETFL
   flags = fcntl (sockser_fd, F_GETFL);
   flags |= O_NONBLOCK | O_NDELAY;
   if (fcntl (sockser_fd, F_SETFL, flags) == -1)
@@ -285,6 +284,7 @@ connected_p (SIM_DESC sd)
       sockser_fd = -1;
       return 0;
     }
+#endif
   return 1;
 }
 

sim/configure

@@ -14439,16 +14439,8 @@ if test "$enable_sim_hardware" = no; then
   sim_hw_cflags="-DWITH_HW=0"
 elif test "$enable_sim_hardware" = yes; then
   sim_hw_cflags="-DWITH_HW=1"
-  # mingw does not support sockser
-  case ${host} in
-    *mingw*) ;;
-    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
-       # that you instatiate.  Instead, other code will call into it directly.
-       # At some point, we should convert it over.
-       sim_hw_sockser="dv-sockser.o"
-       sim_hw_cflags="$sim_hw_cflags -DHAVE_DV_SOCKSER"
-       ;;
-  esac
+        sim_hw_sockser="dv-sockser.o"
+  sim_hw_cflags="$sim_hw_cflags -DHAVE_DV_SOCKSER"
 else
   as_fn_error $? "unknown argument \"$enable_sim_hardware\"" "$LINENO" 5
 fi

sim/m4/sim_ac_option_hardware.m4

@@ -26,16 +26,11 @@ if test "$enable_sim_hardware" = no; then
   sim_hw_cflags="-DWITH_HW=0"
 elif test "$enable_sim_hardware" = yes; then
   sim_hw_cflags="-DWITH_HW=1"
-  # mingw does not support sockser
-  case ${host} in
-    *mingw*) ;;
-    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
-       # that you instatiate.  Instead, other code will call into it directly.
-       # At some point, we should convert it over.
-       sim_hw_sockser="dv-sockser.o"
-       sim_hw_cflags="$sim_hw_cflags -DHAVE_DV_SOCKSER"
-       ;;
-  esac
+  dnl TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+  dnl that you instatiate.  Instead, other code will call into it directly.
+  dnl At some point, we should convert it over.
+  sim_hw_sockser="dv-sockser.o"
+  sim_hw_cflags="$sim_hw_cflags -DHAVE_DV_SOCKSER"
 else
   AC_MSG_ERROR([unknown argument "$enable_sim_hardware"])
 fi