--- bulk_extractor-1.5.5/configure.ac.autoconf-archive	2014-09-16 21:08:06.000000000 +0200
+++ bulk_extractor-1.5.5/configure.ac	2017-10-15 13:01:30.815869517 +0200
@@ -41,7 +41,6 @@
 # use the GNU C++11 extensions for portability's sake (noext).
 # https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_11.html
 
-m4_include([m4/ax_cxx_compile_stdcxx_11.m4])
 AX_CXX_COMPILE_STDCXX_11(noext, optional)
 
 
@@ -205,7 +204,6 @@
  ;;
  *)
   AC_MSG_NOTICE([normal pthreads support])
-  m4_include([m4/ax_pthread.m4])
   AC_MSG_CHECKING([Running pthread test from http://www.gnu.org/software/autoconf-archive/ax_pthread.html..])
   AX_PTHREAD([
               echo Using settings from AX_PTHREAD