build files fixes

Author: Sriya Pratipati

libc/config/linux/x86_64/entrypoints.txt

@@ -365,7 +365,6 @@ set(TARGET_LIBC_ENTRYPOINTS
 
     # wchar.h entrypoints
     libc.src.wchar.btowc
-    libc.src.wchar.mbrtowc
     libc.src.wchar.wcslen
     libc.src.wchar.wctob
     libc.src.wchar.wmemmove
@@ -990,6 +989,9 @@ if(LLVM_LIBC_FULL_BUILD)
     libc.src.strings.strcasecmp_l
     libc.src.strings.strncasecmp_l
 
+    # wchar.h entrypoints
+    libc.src.wchar.mbrtowc
+
     # assert.h entrypoints
     libc.src.assert.__assert_fail
 

libc/hdr/types/mbstate_t.h

@@ -15,7 +15,7 @@
 
 #else // Overlay mode
 
-#include "hdr/wchar_overlay.h"
+#error "Cannot overlay mbstate_t
 
 #endif // LLVM_LIBC_FULL_BUILD
 

libc/include/wchar.yaml

@@ -34,10 +34,10 @@ functions:
       - stdc
     return_type: size_t
     arguments:
-      - type: wchar_t * __restrict
-      - type: const char * __restrict
+      - type: wchar_t *__restrict
+      - type: const char *__restrict
       - type: size_t
-      - type: mbstate_t * __restrict
+      - type: mbstate_t *__restrict
   - name: wmemset
     standards:
       - stdc