Added "make mklibyosys", some minor API changes

misc/example.cc

@@ -0,0 +1,21 @@
+// clang -o example -std=c++11 -I/usr/include/tcl8.5 -I include/ example.cc objs/*.o -lstdc++ -lm -lrt -lreadline -lffi -ldl -ltcl8.5
+
+#include <yosys.h>
+
+int main()
+{
+	Yosys::log_streams.push_back(&std::cout);
+	Yosys::log_error_stderr = true;
+
+	Yosys::yosys_setup();
+	Yosys::yosys_banner();
+
+	Yosys::run_pass("read_verilog example.v");
+	Yosys::run_pass("synth -noabc");
+	Yosys::run_pass("clean -purge");
+	Yosys::run_pass("write_blif example.blif");
+
+	Yosys::yosys_shutdown();
+	return 0;
+}
+