--- configure.ac.orig	2008-03-11 08:42:31.000000000 +0300
+++ configure.ac	2014-07-02 14:29:06.000000000 +0400
@@ -34,7 +34,7 @@
 
 dnl Checks for library functions.
 AC_TYPE_GETGROUPS
-AC_CHECK_FUNCS(strchr memcpy getopt_long getcwd getwd)
+AC_CHECK_FUNCS(strchr memcpy getopt_long getcwd getwd sysconf group_member)
 
 if test "$ac_cv_lib_static_libiberty_a_xmalloc" = no \
      -o "$which_cv_iberty" = no ; then
--- bash.c.orig	2008-01-18 21:07:02.000000000 +0300
+++ bash.c	2014-07-02 10:10:09.000000000 +0400
@@ -46,7 +46,9 @@
  * - changed all occurences of 'gid_t' into 'GID_T'.
  * - exported functions needed in which.c
  */
+#if !defined (HAVE_GROUP_MEMBER)
 static int group_member (GID_T gid);
+#endif
 static char* extract_colon_unit (char const* string, int* p_index);
 
 /*===========================================================================
@@ -199,6 +201,7 @@
     }
 }
 
+#if !defined (HAVE_GROUP_MEMBER)
 /* From bash-3.2 / general.c / line 931 */
 /* Return non-zero if GID is one that we have in our groups list. */
 int
@@ -228,6 +231,7 @@
 
   return (0);
 }
+#endif
 
 /* From bash-3.2 / findcmd.c / line 75 */
 /* Return some flags based on information about this file.
--- config.h.in.orig        2008-08-06 19:19:52.000000000 +0400
+++ config.h.in 2014-07-02 12:56:02.619519923 +0400
@@ -25,6 +25,9 @@
 /* Define to 1 if you have the `getwd' function. */
 #undef HAVE_GETWD
 
+/* Define to 1 if you have the `group_member' function. */
+#undef HAVE_GROUP_MEMBER
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
@@ -55,6 +58,9 @@
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
+/* Define to 1 if you have the `sysconf' function. */
+#undef HAVE_SYSCONF
+
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
--- configure.orig	2008-08-06 19:19:37.000000000 +0400
+++ configure	2014-07-02 14:31:58.006026539 +0400
@@ -4999,7 +4999,7 @@
 
 
 
-for ac_func in strchr memcpy getopt_long getcwd getwd
+for ac_func in strchr memcpy getopt_long getcwd getwd sysconf group_member
 do
 as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
 { echo "$as_me:$LINENO: checking for $ac_func" >&5