Update NXEngine core

.gitmodules

@@ -35,7 +35,7 @@
 	path = libretro/cores/mgba/upstream
 	url = https://github.com/libretro/mgba
 [submodule "libretro/cores/nxengine/core"]
-	path = libretro/cores/nxengine/core
+	path = libretro/cores/nxengine/upstream
 	url = https://github.com/libretro/nxengine-libretro
 [submodule "libretro/cores/oberon/core"]
 	path = libretro/cores/oberon/core

libretro/cores/nxengine/Tupfile

@@ -1,9 +0,0 @@
-include_rules
-
-CORE_DIR = core/nxengine
-EXTRACTDIR = $(CORE_DIR)/extract-auto
-include $(CORE_DIR)/../Makefile.common
-
-CFLAGS += -DHAVE_INTTYPES_H $(INCFLAGS)
-
-include $(LIBRETRO_CORE_INCLUDE)

libretro/cores/nxengine/Tuprules.tup

@@ -0,0 +1,28 @@
+CORE_PKGS += stdcxx libc libm
+NO_UNDEFINED =
+	# __cxa_...
+
+
+EXTRACTDIR = $(CORE_DIR)/extract-auto
+include upstream/Makefile.common
+
+CFLAGS += -O2 -DNDEBUG
+CFLAGS += -DHAVE_INTTYPES_H
+CFLAGS += -DINLINE="inline"
+CFLAGS += -std=gnu11
+CXXFLAGS += -fno-rtti -fno-exceptions -std=gnu++11
+
+: foreach $(SOURCES_C) |> !libretro_cc |> {libretro_objs}
+: foreach $(SOURCES_CXX) |> !libretro_cxx |> {libretro_objs}
+
+: {libretro_objs} |> !libretro_core_link |> {core}
+: {core} |> !publish_core |> {binary}
+
+: $(TUP_CWD)/archives | {core} |> !publish_core_archives |> {package}
+: $(TUP_CWD)/runtime | {core} |> !publish_core_runtime |> {package}
+
+ifdef DEPOT_KEY
+: {binary}  |> !depot_bin_tarball |> {tarballs}
+: {package} |> !depot_pkg_tarball |> {tarballs}
+: foreach {tarballs} |> !public_signature |>
+endif

libretro/cores/nxengine/archives

@@ -2,4 +2,3 @@
 @SDK_USER@/src/libc/@SDK_VERSION@
 @SDK_USER@/src/stdcxx/@SDK_VERSION@
 @DEPOT_USER@/src/retro_frontend/@DEPOT_VERSION@
-@DEPOT_USER@/src/libretro-nxengine/@DEPOT_VERSION@

libretro/cores/nxengine/core

@@ -1 +0,0 @@
-Subproject commit be978910a10527cc819db29389fbcd962328acb0

libretro/cores/nxengine/upstream

@@ -0,0 +1 @@
+Subproject commit 399c670554ae433d479292a482a3c0461dc15a18