add makefile and shell script to make a 64 bit windows backend.dll on 64 bit linux using ming

backendC/CleanCompilerSources/Makefile.linux64_mingw64

+CC = x86_64-w64-mingw32-gcc
+CFLAGS = -D_WINDOWS_ -DG_A64 -O -fomit-frame-pointer
+
+OBJECTS = \
+	backend_dllexport.o backendsupport.o buildtree.o cocl.o \
+	codegen1.o codegen2.o codegen3.o codegen.o \
+	comsupport.o dbprint.o instructions.o optimisations.o \
+	pattern_match_2.o sa.o set_scope_numbers.o settings.o statesgen.o windows_io.o
+
+../backend.dll: $(OBJECTS)
+	$(CC) -shared -s $(OBJECTS) -o $@
+
+backend_dllexport.c: backend.o
+	./add_dllexports.sh
+
+# winedump -j export backend.dll

backendC/CleanCompilerSources/add_dllexports.sh

+#!/bin/bash
+cat ../backend.link64 | tr -d '\r' | sed -e "s/\/EXPORT://" > backend.dllexport_symbols
+ctags -x --c-kinds=f backend.c > backend.c_tags
+cp backend.c backend_dllexport.c
+cat backend.dllexport_symbols | while read in
+do
+line_n=`grep "$in " backend.c_tags | sed -e "s/ [ ]*/ /g" | cut -d ' ' -f 3`
+sed -e "$line_n""s/$in/__declspec(dllexport)$in/" backend_dllexport.c > backend_dllexport_.c
+mv backend_dllexport_.c backend_dllexport.c
+done