diff --git a/project/headers.mk b/project/headers.mk
index 1a210ff..119055a 100644
--- a/project/headers.mk
+++ b/project/headers.mk
@@ -5,5 +5,6 @@ API_HEADERS = \
 INTERNAL_HEADERS = \
 	$(PROJECT_DIR)/src/internal/argv/argv.h \
 	$(PROJECT_DIR)/src/internal/$(PACKAGE)_driver_impl.h \
+	$(PROJECT_DIR)/src/internal/$(PACKAGE)_spawn_impl.h \
 
 ALL_HEADERS = $(API_HEADERS) $(INTERNAL_HEADERS)
diff --git a/src/internal/slibtool_spawn_impl.h b/src/internal/slibtool_spawn_impl.h
new file mode 100644
index 0000000..b376ad8
--- /dev/null
+++ b/src/internal/slibtool_spawn_impl.h
@@ -0,0 +1,69 @@
+/*******************************************************************/
+/*  slibtool: a skinny libtool implementation, written in C        */
+/*  Copyright (C) 2016  Z. Gilboa                                  */
+/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
+#include <unistd.h>
+#include <stdbool.h>
+#include <sys/wait.h>
+
+#ifndef SLBT_USE_FORK
+#ifndef SLBT_USE_VFORK
+#ifndef SLBT_USE_POSIX_SPAWN
+#define SLBT_USE_POSIX_SPAWN
+#endif
+#endif
+#endif
+
+#ifdef  SLBT_USE_POSIX_SPAWN
+#include <spawn.h>
+#endif
+
+extern char ** environ;
+
+static inline int slbt_spawn(
+	struct slbt_exec_ctx *	ectx,
+	bool			fwait)
+{
+	pid_t	pid;
+
+
+#ifdef SLBT_USE_POSIX_SPAWN
+
+	if (posix_spawnp(
+			&pid,
+			ectx->program,
+			0,0,
+			ectx->argv,
+			ectx->envp ? ectx->envp : environ))
+		pid = -1;
+
+#else
+
+#ifdef SLBT_USE_FORK
+	pid = fork();
+#else
+	pid = vfork();
+#endif
+
+#endif
+
+	if (pid < 0)
+		return -1;
+
+	if (pid == 0)
+		return execvp(
+			ectx->program,
+			ectx->argv);
+
+	ectx->pid = pid;
+
+	if (fwait)
+		return waitpid(
+			pid,
+			&ectx->exitcode,
+			0);
+
+	return 0;
+}