compile on openbsd: mostly ifdefs and missing includes,...

base/logging.cc

Index: base/logging.cc
===================================================================
--- base/logging.cc	(revision 17958)
+++ base/logging.cc	(working copy)
@@ -13,7 +13,7 @@
 #include <mach/mach.h>
 #include <mach/mach_time.h>
 #include <mach-o/dyld.h>
-#elif defined(OS_LINUX)
+#elif defined(OS_LINUX) || defined(OS_OPENBSD)
 #include <sys/syscall.h>
 #include <time.h>
 #endif
@@ -129,6 +129,8 @@
   return mach_thread_self();
 #elif defined(OS_LINUX)
   return syscall(__NR_gettid);
+#elif defined(OS_OPENBSD)
+  return (int32)pthread_self();
 #endif
 }
 
@@ -137,7 +139,7 @@
   return GetTickCount();
 #elif defined(OS_MACOSX)
   return mach_absolute_time();
-#elif defined(OS_LINUX)
+#elif defined(OS_LINUX) || defined(OS_OPENBSD)
   struct timespec ts;
   clock_gettime(CLOCK_MONOTONIC, &ts);