Applied feedback

 - headers fixed
 - included `stdint-macros.h` instead of `stdint.h`
 - Updated dependencies of `char16_t` and `char32_t`
 - Added uchar support for linux-riscv
 - Added uchar & wchar support for linux-arm & linux-aarch64
 - Added UCharAPI type to linux/api.td

Author: Febbe

libc/config/linux/aarch64/headers.txt

@@ -25,6 +25,8 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.threads
     libc.include.time
     libc.include.unistd
+    libc.include.wchar
+    libc.include.uchar
 
     libc.include.sys_ioctl
     # Disabled due to epoll_wait syscalls not being available on this platform.

libc/config/linux/api.td

@@ -206,6 +206,15 @@ def WCharAPI : PublicAPI<"wchar.h"> {
   ];
 }
 
+def UCharAPI : PublicAPI<"uchar.h"> {
+  let Types = [
+    "mbstate_t",
+    "char8_t",
+    "char16_t",
+    "char32_t",
+  ];
+}
+
 def SysRandomAPI : PublicAPI<"sys/random.h"> {
   let Types = ["size_t", "ssize_t"];
 }

libc/config/linux/arm/headers.txt

@@ -12,6 +12,8 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.string
     libc.include.strings
     libc.include.search
+    libc.include.wchar
+    libc.include.uchar
 
     # Disabled due to epoll_wait syscalls not being available on this platform.
     # libc.include.sys_epoll

libc/config/linux/riscv/headers.txt

@@ -28,6 +28,7 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.time
     libc.include.unistd
     libc.include.wchar
+    libc.include.uchar
 
     libc.include.arpa_inet
 

libc/include/llvm-libc-types/CMakeLists.txt

@@ -91,8 +91,20 @@ add_header(struct_termios HDR struct_termios.h DEPENDS .cc_t .speed_t .tcflag_t)
 add_header(__getoptargv_t HDR __getoptargv_t.h)
 add_header(wchar_t HDR wchar_t.h)
 add_header(char8_t HDR char8_t.h)
-add_header(char16_t HDR char16_t.h)
-add_header(char32_t HDR char32_t.h)
+add_header(
+    char16_t 
+  HDR 
+    char16_t.h
+  DEPENDS
+    libc.include.llvm-libc-macros.stdint_macros
+)
+add_header(
+    char32_t 
+  HDR 
+    char32_t.h
+  DEPENDS
+    libc.include.llvm-libc-macros.stdint_macros
+)
 add_header(wint_t HDR wint_t.h)
 add_header(sa_family_t HDR sa_family_t.h)
 add_header(socklen_t HDR socklen_t.h)

libc/include/llvm-libc-types/char16_t.h

@@ -1,17 +1,17 @@
-//===-- Definition of clock_t type ----------------------------------------===//
+//===-- Definition of char16_t type ---------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_TYPES_CHAR8_T_H
-#define LLVM_LIBC_TYPES_CHAR8_T_H
+#ifndef LLVM_LIBC_TYPES_CHAR16_T_H
+#define LLVM_LIBC_TYPES_CHAR16_T_H
 
 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
-#include <stdint.h>
+#include "../llvm-libc-macros/stdint-macros.h"
 typedef uint_least16_t char16_t;
 #endif
 
-#endif // LLVM_LIBC_TYPES_CHAR8_T_H
+#endif // LLVM_LIBC_TYPES_CHAR16_T_H

libc/include/llvm-libc-types/char32_t.h

@@ -1,17 +1,17 @@
-//===-- Definition of clock_t type ----------------------------------------===//
+//===-- Definition of char32_t type ---------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_LIBC_TYPES_CHAR8_T_H
-#define LLVM_LIBC_TYPES_CHAR8_T_H
+#ifndef LLVM_LIBC_TYPES_CHAR32_T_H
+#define LLVM_LIBC_TYPES_CHAR32_T_H
 
 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
-#include <stdint.h>
+#include "../llvm-libc-macros/stdint-macros.h"
 typedef uint_least32_t char32_t;
 #endif
 
-#endif // LLVM_LIBC_TYPES_CHAR8_T_H
+#endif // LLVM_LIBC_TYPES_CHAR32_T_H

libc/include/llvm-libc-types/char8_t.h

@@ -1,4 +1,4 @@
-//===-- Definition of clock_t type ----------------------------------------===//
+//===-- Definition of char8_t type ----------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.