./configure: line 7093: ,: command not found
https://github.com/simsong/bulk_extractor/commit/6f800ecb61ac7b44ddf2da878c629c24e9a8806b
--- configure.ac.orig	2014-09-16 14:08:06.000000000 -0500
+++ configure.ac	2016-09-28 19:54:37.000000000 -0500
@@ -150,7 +150,7 @@
 AC_ARG_ENABLE([flexscanners],
               AS_HELP_STRING([--disable-flexscanners], [disable FLEX-based scanners]),
               [],
-              [AC_DEFINE(FLEXSCANNERS_ENABLED, 1, [Use FLEX-based scanners]), flexscanners='yes'])
+              [AC_DEFINE(FLEXSCANNERS_ENABLED, 1, [Use FLEX-based scanners]) flexscanners='yes'])
 AM_CONDITIONAL([FLEXSCANNERS_ENABLED], [test "yes" = "$flexscanners"])