diff --git a/config/ChangeLog b/config/ChangeLog
index 71a6e2d..102fc47 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,14 @@
+2015-07-27  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Sync with GCC
+	2015-07-24  Micahel Darling  <darlingm@gmail.com>
+
+	PR other/66259
+	* gettext.m4: Reflects renaming of configure.in to configure.ac
+	* po.m4: Likewise
+	* stdint.m4: Likewise
+	* tcl.m4: Likewise
+
 2015-07-14  H.J. Lu  <hongjiu.lu@intel.com>
 
 	Sync with GCC
diff --git a/config/gettext.m4 b/config/gettext.m4
index 16070b4..45fa6b4 100644
--- a/config/gettext.m4
+++ b/config/gettext.m4
@@ -81,7 +81,7 @@ AC_DEFUN([AM_GNU_GETTEXT],
   dnl Ideally we would do this search only after the
   dnl      if test "$USE_NLS" = "yes"; then
   dnl        if test "$gt_cv_func_gnugettext_libc" != "yes"; then
-  dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
+  dnl tests. But if configure.ac invokes AM_ICONV after AM_GNU_GETTEXT
   dnl the configure script would need to contain the same shell code
   dnl again, outside any 'if'. There are two solutions:
   dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
@@ -303,7 +303,7 @@ return (int) gettext ("")]ifelse([$2], [need-ngettext], [ + (int) ngettext ("",
     AC_SUBST(USE_INCLUDED_LIBINTL)
     AC_SUBST(CATOBJEXT)
 
-    dnl For backward compatibility. Some configure.ins may be using this.
+    dnl For backward compatibility. Some configure.acs may be using this.
     nls_cv_header_intl=
     nls_cv_header_libgt=
 
diff --git a/config/po.m4 b/config/po.m4
index 2edd5a7..6ceef42 100644
--- a/config/po.m4
+++ b/config/po.m4
@@ -117,14 +117,14 @@ AC_DEFUN([AM_PO_SUBDIRS],
           if test -f "$ac_given_srcdir/$ac_dir/LINGUAS"; then
             # The LINGUAS file contains the set of available languages.
             if test -n "$OBSOLETE_ALL_LINGUAS"; then
-              test -n "$as_me" && echo "$as_me: setting ALL_LINGUAS in configure.in is obsolete" || echo "setting ALL_LINGUAS in configure.in is obsolete"
+              test -n "$as_me" && echo "$as_me: setting ALL_LINGUAS in configure.ac is obsolete" || echo "setting ALL_LINGUAS in configure.ac is obsolete"
             fi
             ALL_LINGUAS_=`sed -e "/^#/d" "$ac_given_srcdir/$ac_dir/LINGUAS"`
             # Hide the ALL_LINGUAS assigment from automake.
             eval 'ALL_LINGUAS''=$ALL_LINGUAS_'
             POMAKEFILEDEPS="$POMAKEFILEDEPS LINGUAS"
           else
-            # The set of available languages was given in configure.in.
+            # The set of available languages was given in configure.ac.
             eval 'ALL_LINGUAS''=$OBSOLETE_ALL_LINGUAS'
           fi
           case "$ac_given_srcdir" in
diff --git a/config/stdint.m4 b/config/stdint.m4
index 61898a7..59f4359 100644
--- a/config/stdint.m4
+++ b/config/stdint.m4
@@ -39,7 +39,7 @@ dnl If your installed header files require the stdint-types you will want to
 dnl create an installable file mylib-int.h that all your other installable
 dnl header may include. So, for a library package named "mylib", just use
 dnl      GCC_HEADER_STDINT(mylib-int.h)
-dnl in configure.in and install that header file in Makefile.am along with
+dnl in configure.ac and install that header file in Makefile.am along with
 dnl the other headers (mylib.h).  The mylib-specific headers can simply
 dnl use "#include <mylib-int.h>" to obtain the stdint-types.
 dnl
diff --git a/config/tcl.m4 b/config/tcl.m4
index 59a0c7e..4542a4b 100644
--- a/config/tcl.m4
+++ b/config/tcl.m4
@@ -2136,7 +2136,7 @@ dnl # preprocessing tests use only CPPFLAGS.
             INSTALL_LIB='$(INSTALL_LIBRARY) $(LIB_FILE) $(LIB_INSTALL_DIR)/$(LIB_FILE) ; (cd $(LIB_INSTALL_DIR) ; $(RANLIB) $(LIB_FILE))'
         fi
 
-dnl        Not at all clear what this was doing in Tcl's configure.in
+dnl        Not at all clear what this was doing in Tcl's configure.ac
 dnl        or why it was needed was needed. In any event, this sort of
 dnl        things needs to be done in the big loop above.
 dnl        REMOVE THIS BLOCK LATER! (mdejong)
@@ -3235,7 +3235,7 @@ AC_DEFUN([SC_TCL_GETGRNAM_R], [AC_CHECK_FUNC(getgrnam_r, [
 #		created. Accumulates.
 #
 #	Requires presence of SC_OUTPUT_COMMANDS_PRE at the end
-#	of configure.in (right before AC_OUTPUT).
+#	of configure.ac (right before AC_OUTPUT).
 #
 #--------------------------------------------------------------------
 
