diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1d93a15
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,20 @@
+
+GNUFLAGS=-Werror -Wall -Iinc -Isrc/win
+CLFLAGS=/I:inc /I:src/win /link /incremental:no /subsystem:windows /nodefaultlib kernel32.lib 
+
+CC=clang
+CFLAGS=$(GNUFLAGS)
+LDFLAGS=/nologo /nodefaultlib /entry:mainCRTStartup
+
+SRC_DIR := src
+OBJ_DIR := bin
+SRC_FILES := $(wildcard $(SRC_DIR)/code/*.c) $(wildcard $(SRC_DIR)/win/*.c)
+OBJ_FILES := $(patsubst $(SRC_DIR)/%.c,$(OBJ_DIR)/%.obj,$(SRC_FILES))
+
+ciabatta.lib: $(OBJ_FILES)
+	lib $(LDFLAGS) /out:$@ $^
+
+$(OBJ_DIR)/%.obj: $(SRC_DIR)/%.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+.PHONY: ciabatta.lib
diff --git a/inc/stdlib.h b/inc/stdlib.h
index 7833aa4..3813e09 100644
--- a/inc/stdlib.h
+++ b/inc/stdlib.h
@@ -101,11 +101,11 @@ void qsort(
 );
 
 // Multibyte strings
-// int mblen(const char *s, size_t n);
-// int mbtowc(wchar_t * restrict pwc, const char * restrict s, size_t n);
-// int wctomb(char *s, wchar_t wchar);
-// size_t mbstowcs(wchar_t * restrict pwcs, const char * restrict s, size_t n);
-// size_t wcstombs(char * restrict s, const wchar_t * restrict pwcs, size_t n);
+int    mblen   (const char *s, size_t n);
+int    mbtowc  (wchar_t *restrict pwc,  const char *restrict s, size_t n);
+size_t mbstowcs(wchar_t *restrict pwcs, const char *restrict s, size_t n);
+int    wctomb  (char *s, wchar_t wchar);
+size_t wcstombs(char *restrict s, const wchar_t *restrict pwcs, size_t n);
 
 // #ifdef __STDC_WANT_LIB_EXT1__
 // 	typedef void (*constraint_handler_t)(const char * restrict msg, void * restrict ptr, errno_t error);
diff --git a/src/code/stdlib/multibyte.c b/src/code/stdlib/multibyte.c
new file mode 100644
index 0000000..561617b
--- /dev/null
+++ b/src/code/stdlib/multibyte.c
@@ -0,0 +1,23 @@
+
+#include <stdlib.h>
+
+int mblen(const char *s, size_t n) {
+    return mbtowc((wchar_t*)0, s, n);
+}
+
+int mbtowc(wchar_t *restrict pwc, const char *restrict s, size_t n) {
+
+}
+
+size_t mbstowcs(wchar_t *restrict pwcs, const char *restrict s, size_t n) {
+
+}
+
+int wctomb(char *s, wchar_t wchar) {
+
+}
+
+size_t wcstombs(char *restrict s, const wchar_t *restrict pwcs, size_t n) {
+
+}
+