Use faster check

diff --git a/configure.ac b/configure.ac
index 47e008cd69d7c2015cb0eedbc589ad0a06bf0026..42ab6c806b6f4a8a8d5ae8e194aca2c953a466fe 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -105,7 +105,7 @@ dnl Checks for typedefs, structures, and compiler characteristics.
 AC_TYPE_SIZE_T
 
 dnl Checks for library functions.
-AC_CHECK_FUNCS([strcasestr])
+AC_CHECK_FUNCS_ONCE([strcasestr])
 
 # Check for libdl
 my_save_LIBS="$LIBS"