Add build system scaffolding and libc headers

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/libc/wctype/iswalnum.c b/lib/libc/wctype/iswalnum.c
new file mode 100644
index 00000000..3eb2f14f
--- /dev/null
+++ b/lib/libc/wctype/iswalnum.c
@@ -0,0 +1,12 @@
+#include <libc.h>
+#include <wctype.h>
+
+int iswalnum(wint_t wc)
+{
+	return iswdigit(wc) || iswalpha(wc);
+}
+
+weak int iswalnum_l(wint_t wc, locale_t unused locale)
+{
+	return iswalnum(wc);
+}