Initial support for building for Windows with OpenWatcom

test/Makefile.w32

@@ -0,0 +1,17 @@
+# Open Watcom makefile to build SDL2 tests for Win32
+# wmake -f Makefile.w32
+
+SYSTEM = nt
+
+INCPATH = -I"$(%WATCOM)/h/nt" -I"$(%WATCOM)/h" -I"../src/video/khronos"
+
+CFLAGS = -bt=nt -d0 -q -bm -5s -fp5 -fpi87 -sg -oteanbmier -ei
+CFLAGS+= -wx -wcd=303
+CFLAGS+= -DSDL_MAIN_HANDLED
+
+CFLAGS+= -DHAVE_OPENGL
+GLLIBS = opengl32.lib
+
+TNSRCS = testnative.obj testnativew32.obj
+
+!include watcom.mif