.

Makefile

+CC	:= emcc -s WASM=1
+SO	:= wasm
+
+all	: libk_so.$(SO)
+
+libk_so.$(SO)	:
+	$(CC) -s SIDE_MODULE=1 -DLIBK_COMPILE -o $@ libk.c

dso.h

+#ifndef	_DSO_H
+#define	_DSO_H
+
+// DSO_EXPORT marks a symbol as exported from currently-compiled DSO.
+// XXX + attr(used) ? (emscripten does this)
+#define DSO_EXPORT __attribute__((visibility("default")))
+
+// XXX stub (__declspec(dllimport) on mingw)
+#define	DSO_IMPORT
+
+
+#endif

libk.c

+#include "libk.h"
+
+LIBKAPI
+int kfunc1() {
+	return 12;
+}

libk.h

+#ifndef	_LIBK_H
+#define	_LIBK_H
+
+#include "dso.h"
+
+#ifdef LIBK_COMPILE
+# define LIBKAPI	DSO_EXPORT
+#else
+# define LIBKAPI	DSO_IMPORT
+#endif
+
+LIBKAPI int kfunc1();
+
+#endif