# Change default port, and ensure endian.h is included when appropriate.
# Specify automake/autoconfig version (automake ignores
#    "AM_INIT_AUTOMAKE([1.16])" in configure.in).
# This change was implemented in-house and is not suitable for upstream use.
#
diff -r b3dce0151fc0 Makefile.am
--- Makefile.am	Mon Oct 04 16:51:52 2021 +0200
+++ Makefile.am	Mon Oct 04 16:52:34 2021 +0200
@@ -4,3 +4,5 @@
 	doc/LTC-TSS_LLD_08_r2.pdf \
 	doc/LTC-TSS_LLD_08_r2.sxw \
 	doc/TSS_programming_SNAFUs.txt
+# Suggested by libtoolize:
+ACLOCAL_AMFLAGS = -I m4
diff -r b3dce0151fc0 configure.ac
--- configure.ac	Mon Oct 04 16:51:52 2021 +0200
+++ configure.ac	Mon Oct 04 16:52:34 2021 +0200
@@ -11,7 +11,10 @@
 
 # compute $target
 AC_CANONICAL_TARGET
-AM_INIT_AUTOMAKE([foreign subdir-objects 1.6])
+# Make automake-1.16 shut up about "option 'subdir-objects' is disabled"
+AM_INIT_AUTOMAKE([foreign subdir-objects 1.16])
+# Required by new autoconf 1.15:
+AC_CONFIG_MACRO_DIR([m4])
 
 # Debugging support
 AC_ARG_ENABLE([debug],
@@ -153,7 +156,9 @@
 #
 # The default port that the TCS daemon listens on
 #
-AC_SUBST(TCSD_DEFAULT_PORT, 30003)
+#AC_SUBST(TCSD_DEFAULT_PORT, 30003)
+# 0 designates UNIX Domain socket. For TCP sockets, 30003 is the traditional TCP port.
+AC_SUBST(TCSD_DEFAULT_PORT, 0)
 #
 # The RPC mechanism to build into both libtspi and the tcsd
 #
@@ -361,6 +366,7 @@
 
 AC_C_BIGENDIAN([AC_DEFINE(_BIG_ENDIAN, 1, [big-endian host])])
 AC_CHECK_DECL(htole32, [AC_DEFINE(HTOLE_DEFINED, 1, [htole32 function is available])])
+AC_CHECK_HEADER(endian.h, [AC_DEFINE(HAVE_ENDIAN_H, 1, [endian.h header])])
 AC_CHECK_HEADER(sys/byteorder.h, [AC_DEFINE(HAVE_BYTEORDER_H, 1, [sys/byteorder.h header])])
 AC_CHECK_FUNC(daemon, [ AC_DEFINE(HAVE_DAEMON, 1, [daemon function is available]) ])
  
@@ -382,7 +388,7 @@
 # it here. If the --prefix option isn't specified during configure, let it all go to
 # /usr/local, even /usr/local/etc. :-P
 if test x"${prefix}" = x"/usr"; then
-	sysconfdir="/etc"
+	sysconfdir="/etc/security"
 	localstatedir="/var"
 	mandir="/usr/share/man"
 elif test x"${prefix}" = x"NONE"; then