Add a "fork" of musl as //fusl.

fusl/src/locale/langinfo.c

+#include <locale.h>
+#include <langinfo.h>
+#include "locale_impl.h"
+#include "libc.h"
+
+static const char c_time[] =
+        "Sun\0" "Mon\0" "Tue\0" "Wed\0" "Thu\0" "Fri\0" "Sat\0"
+        "Sunday\0" "Monday\0" "Tuesday\0" "Wednesday\0"
+        "Thursday\0" "Friday\0" "Saturday\0"
+        "Jan\0" "Feb\0" "Mar\0" "Apr\0" "May\0" "Jun\0"
+        "Jul\0" "Aug\0" "Sep\0" "Oct\0" "Nov\0" "Dec\0"
+        "January\0"   "February\0" "March\0"    "April\0"
+        "May\0"       "June\0"     "July\0"     "August\0"
+        "September\0" "October\0"  "November\0" "December\0"
+        "AM\0" "PM\0"
+        "%a %b %e %T %Y\0"
+        "%m/%d/%y\0"
+        "%H:%M:%S\0"
+        "%I:%M:%S %p\0"
+        "\0"
+        "\0"
+        "%m/%d/%y\0"
+        "0123456789\0"
+        "%a %b %e %T %Y\0"
+        "%H:%M:%S";
+
+static const char c_messages[] = "^[yY]\0" "^[nN]\0" "yes\0" "no";
+static const char c_numeric[] = ".\0" "";
+
+char *__nl_langinfo_l(nl_item item, locale_t loc)
+{
+        int cat = item >> 16;
+        int idx = item & 65535;
+        const char *str;
+
+        if (item == CODESET) return MB_CUR_MAX==1 ? "ASCII" : "UTF-8";
+        
+        switch (cat) {
+        case LC_NUMERIC:
+                if (idx > 1) return "";
+                str = c_numeric;
+                break;
+        case LC_TIME:
+                if (idx > 0x31) return "";
+                str = c_time;
+                break;
+        case LC_MONETARY:
+                if (idx > 0) return "";
+                str = "";
+                break;
+        case LC_MESSAGES:
+                if (idx > 3) return "";
+                str = c_messages;
+                break;
+        default:
+                return "";
+        }
+
+        for (; idx; idx--, str++) for (; *str; str++);
+        if (cat != LC_NUMERIC && *str) str = LCTRANS(str, cat, loc);
+        return (char *)str;
+}
+
+char *__nl_langinfo(nl_item item)
+{
+        return __nl_langinfo_l(item, CURRENT_LOCALE);
+}
+
+weak_alias(__nl_langinfo, nl_langinfo);
+weak_alias(__nl_langinfo_l, nl_langinfo_l);