Drop 4ti2's autoconf version down to 2.69 for older systems

[ci skip]

Author: d-torrance

M2/cmake/build-libraries.cmake

@@ -773,8 +773,9 @@ ExternalProject_Add(build-4ti2
   SOURCE_DIR        libraries/4ti2/build
   DOWNLOAD_DIR      ${CMAKE_SOURCE_DIR}/BUILD/tarfiles
   BUILD_IN_SOURCE   ON
-  PATCH_COMMAND     mkdir swig # needed because the tar doesn't have a swig directory but 4ti2's Makefile.am seems to need it
-  CONFIGURE_COMMAND autoreconf -vif
+  PATCH_COMMAND     patch --batch -p1 < ${CMAKE_SOURCE_DIR}/libraries/4ti2/patch-1.6.11
+  # tar doesn't have a swig directory but 4ti2's Makefile.am seems to need it
+  CONFIGURE_COMMAND mkdir -p swig && autoreconf -vif
             COMMAND ${CONFIGURE} --prefix=${M2_HOST_PREFIX}
                       #-C --cache-file=${CONFIGURE_CACHE}
                       --with-glpk=${GLPK_ROOT}

M2/libraries/4ti2/Makefile.in

@@ -2,7 +2,7 @@
 VERSION = 1.6.11
 TARDIR = 4ti2-$(VERSION)
 
-# PATCHFILE = @abs_srcdir@/patch-$(VERSION)
+PATCHFILE = @abs_srcdir@/patch-$(VERSION)
 PRECONFIGURE = mkdir -p swig && autoreconf -vif
 
 VERSION_ = $(shell echo $(VERSION) | sed 's/\./_/g')

M2/libraries/4ti2/patch-1.6.11

@@ -0,0 +1,13 @@
+Description: Drop autoconf version down to 2.69 for older systems
+
+--- a/configure.ac
++++ 4ti2-1.6.11/configure.ac
+@@ -1,7 +1,7 @@
+ #                                               -*- Autoconf -*-
+ # Process this file with autoconf to produce a configure script.
+ 
+-AC_PREREQ([2.71])
++AC_PREREQ([2.69])
+ AC_INIT([4ti2],[1.6.11])
+ AC_CONFIG_MACRO_DIR([m4])
+ AM_INIT_AUTOMAKE([foreign std-options])