Add interposer code

source/interposer/Makefile

@@ -0,0 +1,38 @@
+#!/usr/bin/make -f
+# Makefile for carla interposer #
+# ----------------------------- #
+# Created by falkTX
+#
+
+CWD=..
+include ../Makefile.mk
+
+# --------------------------------------------------------------
+
+BUILD_CXX_FLAGS += -I../includes -I../utils -isystem ../modules
+
+# --------------------------------------------------------------
+
+TARGETS = ../../bin/libcarlainterposer$(LIB_EXT)
+
+# --------------------------------------------------------------
+
+all: $(TARGETS)
+
+clean:
+	$(RM) $(TARGETS) *.o
+
+debug:
+	$(MAKE) DEBUG=true
+
+# --------------------------------------------------------------
+
+interposer.cpp.o: interposer.cpp
+	$(CXX) $< $(BUILD_CXX_FLAGS) -c -o $@
+
+# --------------------------------------------------------------
+
+../../bin/libcarlainterposer$(LIB_EXT): interposer.cpp.o
+	$(CXX) $< $(SHARED) $(LINK_FLAGS) -ldl -o $@
+
+# --------------------------------------------------------------

source/interposer/interposer.cpp

@@ -0,0 +1,53 @@
+/*
+ * Carla Interposer
+ * Copyright (C) 2014 Filipe Coelho <falktx@falktx.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * For a full copy of the GNU General Public License see the doc/GPL.txt file.
+ */
+
+#include "CarlaUtils.hpp"
+
+#include <cerrno>
+#include <dlfcn.h>
+#include <sched.h>
+#include <spawn.h>
+
+CARLA_EXPORT
+pid_t fork()
+{
+    carla_stdout("------------------------------- fork called");
+    errno = ENOSYS;
+    return -1;
+}
+
+CARLA_EXPORT
+int clone(int (*)(void*), void*, int, void*, ...)
+{
+    carla_stdout("------------------------------- clone called");
+    errno = ENOSYS;
+    return -1;
+}
+
+CARLA_EXPORT
+int posix_spawn(pid_t*, const char*, const posix_spawn_file_actions_t*, const posix_spawnattr_t*, char* const[], char* const[])
+{
+    carla_stdout("------------------------------- posix_spawn called");
+    return ENOSYS;
+}
+
+CARLA_EXPORT
+int posix_spawnp(pid_t*, const char*, const posix_spawn_file_actions_t*, const posix_spawnattr_t*, char* const[], char* const[])
+{
+    carla_stdout("------------------------------- posix_spawnp called");
+    return ENOSYS;
+}