This commit brings tbe project closer to a successful GNU/Linux build. Unfortunately, I do not have an environment available to me right now to properly test it and resolve issues that I am sure exist due to the change to display_surface. At this point I want to get the (fully working) VS2017 Windows build out and available. I won't tag any commit R4 until it build with multiple platforms, but for now I'm pushing this to the world.

Author: mikebmcl

N3888_RefImpl/src/Makefile.am

@@ -41,3 +41,4 @@ endif
 ##then
 ##	N3888_RefImpl_LDADD += -fpermissive
 ##fi
+N3888_RefImpl_LDADD += -lturbojpeg

configure.ac

@@ -7,14 +7,12 @@ AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_FILES([Makefile N3888_RefImpl/Makefile N3888_RefImpl/src/Makefile])
 AC_CONFIG_MACRO_DIR([m4])
 AC_LANG([C++])
-AX_CXX_COMPILE_STDCXX_11([noext], [mandatory])
-AX_CFLAGS_WARN_ALL
-AX_CXXFLAGS_WARN_ALL
-
-dnl check for libjpeg-turbo
-AC_CHECK_HEADERS(turbojpeg.h,[],[AC_MSG_ERROR(turbojpeg.h not found. Install libjpeg-turbo), AC_INCLUDES_DEFAULT)
-AC_SEARCH_LIBS(tjInitCompress,jpeg,[],[AC_MSG_ERROR(libjpeg-turbo not found. Install libjpeg-turbo),[])
-PKG_CHECK_MODULES([GTKCAIRO], [gtk+-3.0 >= 3.8.0 gmodule-2.0 gobject-2.0 cairo >= 1.12.16 x11])
+dnl AX_CXX_COMPILE_STDCXX_14([noext], [mandatory])
+dnl AX_CFLAGS_WARN_ALL
+dnl AX_CXXFLAGS_WARN_ALL
+dnl AC_CHECK_HEADERS([turbojpeg.h],[],[AC_MSG_ERROR(turbojpeg.h not found. Install libjpeg-turbo)], [AC_INCLUDES_DEFAULT])
+dnl AC_SEARCH_LIBS([tjInitCompress],[libturbojpeg],[],[AC_MSG_ERROR(libjpeg-turbo not found. Install libjpeg-turbo)],[-lz -lm])
+PKG_CHECK_MODULES([GTKCAIRO], [cairo >= 1.12.16 x11])
 PKG_PROG_PKG_CONFIG
 AC_ARG_ENABLE([xcb],
 [  --enable-xcb       Build with Xcb],

m4/ax_append_flag.m4

@@ -1,5 +1,5 @@
 # ===========================================================================
-#      http://www.gnu.org/software/autoconf-archive/ax_append_flag.html
+#      https://www.gnu.org/software/autoconf-archive/ax_append_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -34,7 +34,7 @@
 #   Public License for more details.
 #
 #   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
 #
 #   As a special exception, the respective Autoconf Macro's copyright owner
 #   gives unlimited permission to copy, distribute and modify the configure
@@ -49,21 +49,23 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 2
+#serial 7
 
 AC_DEFUN([AX_APPEND_FLAG],
-[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX
-AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])dnl
-AS_VAR_SET_IF(FLAGS,
-  [case " AS_VAR_GET(FLAGS) " in
-    *" $1 "*)
-      AC_RUN_LOG([: FLAGS already contains $1])
-      ;;
-    *)
-      AC_RUN_LOG([: FLAGS="$FLAGS $1"])
-      AS_VAR_SET(FLAGS, ["AS_VAR_GET(FLAGS) $1"])
-      ;;
-   esac],
-  [AS_VAR_SET(FLAGS,["$1"])])
+[dnl
+AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF
+AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])
+AS_VAR_SET_IF(FLAGS,[
+  AS_CASE([" AS_VAR_GET(FLAGS) "],
+    [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])],
+    [
+     AS_VAR_APPEND(FLAGS,[" $1"])
+     AC_RUN_LOG([: FLAGS="$FLAGS"])
+    ])
+  ],
+  [
+  AS_VAR_SET(FLAGS,[$1])
+  AC_RUN_LOG([: FLAGS="$FLAGS"])
+  ])
 AS_VAR_POPDEF([FLAGS])dnl
 ])dnl AX_APPEND_FLAG

m4/ax_cflags_warn_all.m4

@@ -1,5 +1,5 @@
 # ===========================================================================
-#    http://www.gnu.org/software/autoconf-archive/ax_cflags_warn_all.html
+#    https://www.gnu.org/software/autoconf-archive/ax_cflags_warn_all.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -43,7 +43,7 @@
 #   Public License for more details.
 #
 #   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
 #
 #   As a special exception, the respective Autoconf Macro's copyright owner
 #   gives unlimited permission to copy, distribute and modify the configure
@@ -58,7 +58,7 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 15
+#serial 16
 
 AC_DEFUN([AX_FLAGS_WARN_ALL],[dnl
 AS_VAR_PUSHDEF([FLAGS],[_AC_LANG_PREFIX[]FLAGS])dnl

m4/ax_check_define.m4

@@ -1,5 +1,5 @@
 # ===========================================================================
-#      http://www.gnu.org/software/autoconf-archive/ax_check_define.html
+#     https://www.gnu.org/software/autoconf-archive/ax_check_define.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -29,7 +29,7 @@
 #   Public License for more details.
 #
 #   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
 #
 #   As a special exception, the respective Autoconf Macro's copyright owner
 #   gives unlimited permission to copy, distribute and modify the configure
@@ -44,7 +44,7 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 8
+#serial 9
 
 AU_ALIAS([AC_CHECK_DEFINED], [AC_CHECK_DEFINE])
 AC_DEFUN([AC_CHECK_DEFINE],[