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

fusl/src/ctype/__ctype_toupper_loc.c

Index: fusl/src/ctype/__ctype_toupper_loc.c
diff --git a/fusl/src/ctype/__ctype_toupper_loc.c b/fusl/src/ctype/__ctype_toupper_loc.c
new file mode 100644
index 0000000000000000000000000000000000000000..ffaef0e91ffbb6dcccef6702345e252833fc22d9
--- /dev/null
+++ b/fusl/src/ctype/__ctype_toupper_loc.c
@@ -0,0 +1,30 @@
+#include <stdint.h>
+
+static const int32_t table[] = {
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
+16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
+32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,
+48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
+64,
+'A','B','C','D','E','F','G','H','I','J','K','L','M',
+'N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
+91,92,93,94,95,96,
+'A','B','C','D','E','F','G','H','I','J','K','L','M',
+'N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
+123,124,125,126,127,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+};
+
+static const int32_t *const ptable = table+128;
+
+const int32_t **__ctype_toupper_loc(void)
+{
+	return (void *)&ptable;
+}