wasm: support more vendor libraries

Adds support for:
- box2d
- cgltf
- stb image
- stb rect pack

vendor/box2d/wasm.Makefile

@@ -0,0 +1,32 @@
+# Custom Makefile to build box2d for Odin's WASM targets.
+# I tried to make a cmake toolchain file for this / use cmake but this is far easier.
+# NOTE: We are pretending to be emscripten to box2d so it takes WASM code paths, but we don't actually use emscripten.
+
+# CC = $(shell brew --prefix llvm)/bin/clang
+# LD = $(shell brew --prefix llvm)/bin/wasm-ld
+
+VERSION   = 3.0.0
+SRCS      = $(wildcard box2d-$(VERSION)/src/*.c)
+OBJS_SIMD = $(SRCS:.c=_simd.o)
+OBJS      = $(SRCS:.c=.o)
+SYSROOT   = $(shell odin root)/vendor/libc
+CFLAGS    = -Ibox2d-$(VERSION)/include -Ibox2d-$(VERSION)/Extern/simde --target=wasm32 -D__EMSCRIPTEN__ -DNDEBUG -O3 --sysroot=$(SYSROOT)
+
+all: lib/box2d_wasm.o lib/box2d_wasm_simd.o clean
+
+%.o: %.c
+	$(CC) -c $(CFLAGS) $< -o $@
+
+%_simd.o: %.c
+	$(CC) -c $(CFLAGS) -msimd128 $< -o $@
+
+lib/box2d_wasm.o: $(OBJS)
+	$(LD) -r -o lib/box2d_wasm.o $(OBJS)
+
+lib/box2d_wasm_simd.o: $(OBJS_SIMD)
+	$(LD) -r -o lib/box2d_wasm_simd.o $(OBJS_SIMD)
+
+clean:
+	rm -rf $(OBJS) $(OBJS_SIMD)
+
+.PHONY: clean