Continue with the FreeBSD port - this version builds and links, though...

base/logging.cc

Index: base/logging.cc
===================================================================
--- base/logging.cc	(revision 25977)
+++ 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_FREEBSD)
 #include <sys/syscall.h>
 #include <time.h>
 #endif
@@ -125,6 +125,9 @@
   return mach_thread_self();
 #elif defined(OS_LINUX)
   return syscall(__NR_gettid);
+#elif defined(OS_FREEBSD)
+  // TODO(benl): find a better thread ID
+  return reinterpret_cast<int32>(pthread_self());
 #endif
 }
 
@@ -133,7 +136,7 @@
   return GetTickCount();
 #elif defined(OS_MACOSX)
   return mach_absolute_time();
-#elif defined(OS_LINUX)
+#elif defined(OS_LINUX) || defined(OS_FREEBSD)
   struct timespec ts;
   clock_gettime(CLOCK_MONOTONIC, &ts);
 
@@ -214,7 +217,7 @@
   return true;
 }
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_FREEBSD)
 int GetLoggingFileDescriptor() {
   // No locking needed, since this is only called by the zygote server,
   // which is single-threaded.