Add wasm compilation capabilities

.gitignore

@@ -59,3 +59,6 @@ fshistory
 
 # filesystem
 *.fs
+
+# webassembly
+*.wasm

Makefile

@@ -6,7 +6,7 @@ OBJS = main.o mz.o ram.o debugger.o cpu.o vga.o ports.o dos.o alloc.o keyb.o   \
 	sdl.o screen.o rom.o fs.o bios.o fonts.o pic.o pit.o mouse.o      \
 	clock.o fs4.o exit_strategy.o disk.o multiplex.o compare.o ems.o
 
-all: fshistory fs1.fs fs2.fs fs3.fs fs4.fs
+all: fshistory data/fs1.fs data/fs2.fs data/fs3.fs data/fs4.fs
 
 fshistory: ${OBJS}
 	${CC} -o fshistory ${OBJS} ${LDFLAGS}
@@ -28,16 +28,16 @@ fshistory.wasm: ${OBJS} libc.o
 	--export=MouseMotion                                    \
 	-o fshistory.wasm ${OBJS} libc.o
 
-fs1.fs: data/fs1.fs.bz2
+data/fs1.fs: data/fs1.fs.bz2
 	bzip2 -dk data/fs1.fs.bz2
 
-fs2.fs: data/fs2.fs.bz2
+data/fs2.fs: data/fs2.fs.bz2
 	bzip2 -dk data/fs2.fs.bz2
 
-fs3.fs: data/fs3.fs.bz2
+data/fs3.fs: data/fs3.fs.bz2
 	bzip2 -dk data/fs3.fs.bz2
 
-fs4.fs: data/fs4.fs.bz2
+data/fs4.fs: data/fs4.fs.bz2
 	bzip2 -dk data/fs4.fs.bz2
 
 libc.o: src/wasm_libc_wrapper

scripts/compile_fast.sh

@@ -0,0 +1,4 @@
+gcc -Ofast -DFS4 -DUNSAFE_RAM -ofshistory src/*.c src/cpu/cpu.c src/devices/*.c src/disasm/*.c src/dos/*.c src/fs/*.c src/utils/*.c  -lSDL2
+
+#cat src/*.c src/cpu/*.h src/cpu/*.c src/devices/*.c src/disasm/*.c src/dos/*.c src/fs/*.c src/utils/*.c > single.c
+#gcc -Ofast -DFS4 single.c -lSDL2

scripts/compile_wasm.sh

@@ -0,0 +1,12 @@
+#stop on error
+set -e
+
+#generate wasm file
+make clean
+rm -f fshistory.wasm
+make fshistory.wasm CC=clang LDFLAGS="--target=wasm32" CFLAGS="-Os --target=wasm32 -DFS4 -Werror -DUNSAFE_RAM -Wimplicit-fallthrough"
+
+wasm-gc fshistory.wasm
+wasm-strip fshistory.wasm
+
+wasm2wat fshistory.wasm | grep 'import\|export'