Skeleton of C-initiating-style C binding.

build.sbt

@@ -39,4 +39,18 @@ lazy val root = (project in file(".")).settings(
     antlr4GenVisitor in Antlr4 := false
   )
 
+lazy val jarList = taskKey[Seq[File]]("list dependency jars")
 
+jarList := {
+  val cp: Seq[File] = (dependencyClasspath in Compile).value.files
+  cp
+}
+
+lazy val makeJarListFile = taskKey[Unit]("write a list of dependency jar paths separated by colons (:) to target/jars.txt")
+
+makeJarListFile := {
+  val jl = jarList.value
+  val jlStr = jl.mkString(":")
+  println("Dependency jars: " + jlStr)
+  IO.write(new java.io.File("cbinding/jars.txt"), jlStr)
+}

cbinding/.gitignore

+*.so
+jars.txt

cbinding/Makefile

+CFLAGS += -std=gnu11
+ifndef JAVA_HOME
+    $(error JAVA_HOME is required. Invoke with 'make JAVA_HOME=/path/to/java/home')
+endif
+
+.PHONY: all
+all: libmurefimpl2start.so
+
+libmurefimpl2start.so: refimpl2-start.c cbinding.txt
+	$(CC) -fPIC -shared $(CFLAGS) -o $@ $< $(LDFLAGS)
+
+cbinding.txt: ../build.sbt
+	cd .. ; sbt makeJarListFile
+
+.PHONY: clean
+
+clean:
+	rm *.so

cbinding/refimpl2-start.c

+#include <stdint.h>
+#include <stdlib.h>
+
+#include "refimpl2-start.h"
+
+MuVM *mu_refimpl2_new() {
+    return NULL;
+}
+
+MuVM *mu_refimpl2_new_ex(int64_t heap_size, int64_t global_size, int64_t stack_size) {
+    return NULL;
+}
+
+void mu_refimpl2_close(MuVM *mvm) {
+}

cbinding/refimpl2-start.h

+#ifndef __REFIMPL2_START_H__
+#define __REFIMPL2_START_H__
+
+#include <stdint.h>
+
+#include "muapi.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+MuVM *mu_refimpl2_new();
+MuVM *mu_refimpl2_new_ex(int64_t heap_size, int64_t global_size, int64_t stack_size);
+
+void mu_refimpl2_close(MuVM *mvm);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // __REFIMPL2_START_H__