gistfile1.diff

diff --git a/configure.ac b/configure.ac
index aa17d7c..d0f37ef 100644
--- a/configure.ac
+++ b/configure.ac
@@ -199,6 +199,12 @@ case $GAUCHE_THREAD_TYPE in
       THREADDLLIBS="-lpthread -lrt"
       GAUCHE_THREAD_TYPE=pthreads
       ;;
+    *-*-openbsd*)
+      AC_DEFINE(GC_OPENBSD_THREADS,1,[Define to use OpenBSD threads])
+      INCLUDES="$INCLUDES -pthread"
+      THREADLIBS="-lpthread"
+      GAUCHE_THREAD_TYPE=pthreads
+      ;;
     *-*-solaris*)
       AC_DEFINE(GC_SOLARIS_THREADS,1,[Define to use Solaris threads])
       AC_DEFINE(GC_SOLARIS_PTHREADS,1,[Define to use Solaris pthreads])
diff --git a/ext/net/gauche-net.h b/ext/net/gauche-net.h
index 7377a36..40ab3d4 100644
--- a/ext/net/gauche-net.h
+++ b/ext/net/gauche-net.h
@@ -74,6 +74,10 @@ typedef SOCKET Socket;
 #endif
 #include <gauche/extern.h>
 
+#ifdef __OpenBSD__
+#include <sys/uio.h>
+#endif /*__OpenBSD__*/
+
 SCM_DECL_BEGIN
 
 /* windows stuff */
@@ -94,7 +98,7 @@ const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
  * Sockaddr_storage
  */
 
-#if !defined(HAVE_STRUCT_SOCKADDR_STORAGE) && !defined(_MSC_VER)
+#if !defined(HAVE_STRUCT_SOCKADDR_STORAGE) && !defined(_MSC_VER) && !defined(__OpenBSD__)
 /* Alternative implementation in case the system doesn't provide
    sockaddr_storage.  The code is based on the reference implementation
    provided in RFC3493.

ふーむ、本家(boehm gc)にも一応報告上がっているようだけどまだ根本的な対応はされていないみたいですね。