1 files changed, 0 insertions, 42 deletions
diff --git a/extension/m4/lock.m4 b/extension/m4/lock.m4
deleted file mode 100644
index 9fd4aa78..00000000
--- a/extension/m4/lock.m4
+++ /dev/null
@@ -1,42 +0,0 @@
-# lock.m4 serial 13 (gettext-0.18.2)
-dnl Copyright (C) 2005-2015 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Bruno Haible.
-
-AC_DEFUN([gl_LOCK],
-[
-  AC_REQUIRE([gl_THREADLIB])
-  if test "$gl_threads_api" = posix; then
-    # OSF/1 4.0 and Mac OS X 10.1 lack the pthread_rwlock_t type and the
-    # pthread_rwlock_* functions.
-    AC_CHECK_TYPE([pthread_rwlock_t],
-      [AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1],
-         [Define if the POSIX multithreading library has read/write locks.])],
-      [],
-      [#include <pthread.h>])
-    # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
-    AC_COMPILE_IFELSE([
-      AC_LANG_PROGRAM(
-        [[#include <pthread.h>]],
-        [[
-#if __FreeBSD__ == 4
-error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
-#elif (defined __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ \
-       && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070)
-error "No, in Mac OS X < 10.7 recursive mutexes actually don't work."
-#else
-int x = (int)PTHREAD_MUTEX_RECURSIVE;
-return !x;
-#endif
-        ]])],
-      [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1],
-         [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
-  fi
-  gl_PREREQ_LOCK
-])
-
-# Prerequisites of lib/glthread/lock.c.
-AC_DEFUN([gl_PREREQ_LOCK], [:])