[common] properly define _GNU_SOURCE and set the thread names

VERSION

@@ -1 +1 @@
-B2-rc3-0-g82e0b7b6ab+1
+B2-rc3-1-g90d0cd873d+1

common/CMakeLists.txt

@@ -5,6 +5,8 @@ include_directories(
 	${PROJECT_SOURCE_DIR}/include
 )
 
+add_definitions(-D_GNU_SOURCE)
+
 if(ENABLE_BACKTRACE)
   add_definitions(-DENABLE_BACKTRACE)
 endif()

common/src/platform/linux/crash.c

@@ -17,7 +17,6 @@ this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 Place, Suite 330, Boston, MA 02111-1307 USA
 */
 
-#define _GNU_SOURCE
 #include "common/crash.h"
 #include "common/debug.h"
 

common/src/platform/linux/thread.c

@@ -54,6 +54,8 @@ bool lgCreateThread(const char * name, LGThreadFunction function, void * opaque,
     *handle = NULL;
     return false;
   }
+
+  pthread_setname_np((*handle)->handle, name);
   return true;
 }