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

fusl/src/locale/localeconv.c

Index: fusl/src/locale/localeconv.c
diff --git a/fusl/src/locale/localeconv.c b/fusl/src/locale/localeconv.c
new file mode 100644
index 0000000000000000000000000000000000000000..4cbb9dc52d22dcaf0c64769c208133a38c07be34
--- /dev/null
+++ b/fusl/src/locale/localeconv.c
@@ -0,0 +1,34 @@
+#include <locale.h>
+#include <limits.h>
+
+static const struct lconv posix_lconv = {
+	.decimal_point = ".",
+	.thousands_sep = "",
+	.grouping = "",
+	.int_curr_symbol = "",
+	.currency_symbol = "",
+	.mon_decimal_point = "",
+	.mon_thousands_sep = "",
+	.mon_grouping = "",
+	.positive_sign = "",
+	.negative_sign = "",
+	.int_frac_digits = CHAR_MAX,
+	.frac_digits = CHAR_MAX,
+	.p_cs_precedes = CHAR_MAX,
+	.p_sep_by_space = CHAR_MAX,
+	.n_cs_precedes = CHAR_MAX,
+	.n_sep_by_space = CHAR_MAX,
+	.p_sign_posn = CHAR_MAX,
+	.n_sign_posn = CHAR_MAX,
+	.int_p_cs_precedes = CHAR_MAX,
+	.int_p_sep_by_space = CHAR_MAX,
+	.int_n_cs_precedes = CHAR_MAX,
+	.int_n_sep_by_space = CHAR_MAX,
+	.int_p_sign_posn = CHAR_MAX,
+	.int_n_sign_posn = CHAR_MAX,
+};
+
+struct lconv *localeconv(void)
+{
+	return (void *)&posix_lconv;
+}