configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 5c6cb92..b99bedd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,10 @@ AC_PROG_CPP
 AC_PROG_CXX
 AC_PROG_INSTALL
 AC_PROG_RANLIB
+AN_MAKEVAR([AR], [AC_PROG_AR])
+AN_PROGRAM([ar], [AC_PROG_AR])
+AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL(AR, ar, :)])
+AC_PROG_AR
 
 # Checks for header files.
 AC_CHECK_HEADERS([dlfcn.h fcntl.h float.h limits.h \