diff --git a/libc/docs/headers/stdio.rst b/libc/docs/headers/stdio.rst
index 3cd355529d400..1833eb5acf8ab 100644
--- a/libc/docs/headers/stdio.rst
+++ b/libc/docs/headers/stdio.rst
@@ -1,93 +1,359 @@
+.. include:: ../check.rst
+
 =======
 stdio.h
 =======
 
-.. include:: ../check.rst
-
----------------
-Source location
----------------
-
--   The main source for string functions is located at:
-    ``libc/src/stdio`` with subdirectories for internal implementations.
-
----------------------
-Implementation Status
----------------------
-
-Formatted Input/Output Functions
-================================
-
-These functions take in format strings and arguments of various types and
-convert either to or from those arguments. These functions are the current focus
-(owner: michaelrj).
-
-=============  =========
-Function Name  Available
-=============  =========
-\*printf       Mostly
-\*scanf        |check|
-=============  =========
-
-``FILE`` Access
-===============
-
-These functions are used to interact with the ``FILE`` object type, which is an
-I/O stream, often used to represent a file on the host's hard drive. Currently
-the ``FILE`` object is only available on linux.
-
-=============  =========
-Function Name  Available
-=============  =========
-fopen          |check|
-freopen
-fclose         |check|
-fflush         |check|
-setbuf         |check|
-setvbuf        |check|
-ftell          |check|
-fgetpos
-fseek          |check|
-fsetpos
-rewind
-tmpfile
-clearerr       |check|
-feof           |check|
-ferror         |check|
-flockfile      |check|
-funlockfile    |check|
-=============  =========
-
-Operations on system files
-==========================
+Macros
+======
 
-These functions operate on files on the host's system, without using the
-``FILE`` object type. They only take the name of the file being operated on.
+.. list-table::
+  :widths: auto
+  :align: center
+  :header-rows: 1
 
-=============  =========
-Function_Name  Available
-=============  =========
-remove         |check|
-rename         |check|
-tmpnam
-=============  =========
+  * - Macro
+    - Implemented
+    - C23 Standard Section
+    - POSIX Docs
+  * - BUFSIZ
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - EOF
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - FILENAME_MAX
+    -
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - FOPEN_MAX
+    -
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - L_ctermid
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - L_tmpnam
+    -
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - SEEK_CUR
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - SEEK_END
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - SEEK_SET
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - TMP_MAX
+    -
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - _IOFBF
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - _IOLBF
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - _IONBF
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - _PRINTF_NAN_LEN_MAX
+    -
+    - 7.23.1
+    -
+  * - __STDC_VERSION_STDIO_H__
+    -
+    - 7.23.1
+    -
+  * - stderr
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - stdin
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
+  * - stdout
+    - |check|
+    - 7.23.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/stdio.h.html>`__
 
-Unformatted ``FILE`` Input/Output Functions
-===========================================
+Functions
+=========
 
-The ``gets`` function was removed in C11 for having no bounds checking and
-therefor being impossible to use safely.
+.. list-table::
+  :widths: auto
+  :align: center
+  :header-rows: 1
 
-=============  =========
-Function Name  Available
-=============  =========
-(f)getc        |check|
-fgets          |check|
-getchar        |check|
-fread          |check|
-(f)putc        |check|
-(f)puts        |check|
-putchar        |check|
-fwrite         |check|
-ungetc         |check|
-=============  =========
+  * - Function
+    - Implemented
+    - C23 Standard Section
+    - POSIX Docs
+  * - clearerr
+    - |check|
+    - 7.23.10.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/clearerr.html>`__
+  * - ctermid
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/ctermid.html>`__
+  * - dprintf
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/dprintf.html>`__
+  * - fclose
+    - |check|
+    - 7.23.5.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fclose.html>`__
+  * - fdopen
+    - |check|
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fdopen.html>`__
+  * - feof
+    - |check|
+    - 7.23.10.2
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/feof.html>`__
+  * - ferror
+    - |check|
+    - 7.23.10.3
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/ferror.html>`__
+  * - fflush
+    - |check|
+    - 7.23.5.2
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fflush.html>`__
+  * - fgetc
+    - |check|
+    - 7.23.7.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fgetc.html>`__
+  * - fgetpos
+    -
+    - 7.23.9.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fgetpos.html>`__
+  * - fgets
+    - |check|
+    - 7.23.7.2
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fgets.html>`__
+  * - fileno
+    - |check|
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fileno.html>`__
+  * - flockfile
+    - |check|
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/flockfile.html>`__
+  * - fmemopen
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fmemopen.html>`__
+  * - fopen
+    - |check|
+    - 7.23.5.3
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fopen.html>`__
+  * - fprintf
+    - |check|
+    - 7.23.6.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fprintf.html>`__
+  * - fputc
+    - |check|
+    - 7.23.7.3
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fputc.html>`__
+  * - fputs
+    - |check|
+    - 7.23.7.4
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fputs.html>`__
+  * - fread
+    - |check|
+    - 7.23.8.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fread.html>`__
+  * - freopen
+    -
+    - 7.23.5.4
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/freopen.html>`__
+  * - fscanf
+    - |check|
+    - 7.23.6.2
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fscanf.html>`__
+  * - fseek
+    - |check|
+    - 7.23.9.2
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fseek.html>`__
+  * - fseeko
+    - |check|
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fseeko.html>`__
+  * - fsetpos
+    -
+    - 7.23.9.3
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fsetpos.html>`__
+  * - ftell
+    - |check|
+    - 7.23.9.4
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/ftell.html>`__
+  * - ftello
+    - |check|
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/ftello.html>`__
+  * - ftrylockfile
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/ftrylockfile.html>`__
+  * - funlockfile
+    - |check|
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/funlockfile.html>`__
+  * - fwrite
+    - |check|
+    - 7.23.8.2
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/fwrite.html>`__
+  * - getc
+    - |check|
+    - 7.23.7.5
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/getc.html>`__
+  * - getchar
+    - |check|
+    - 7.23.7.6
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/getchar.html>`__
+  * - getdelim
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/getdelim.html>`__
+  * - getline
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/getline.html>`__
+  * - open_memstream
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/open_memstream.html>`__
+  * - pclose
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/pclose.html>`__
+  * - perror
+    -
+    - 7.23.10.4
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/perror.html>`__
+  * - popen
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/popen.html>`__
+  * - printf
+    - |check|
+    - 7.23.6.3
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/printf.html>`__
+  * - putc
+    - |check|
+    - 7.23.7.7
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/putc.html>`__
+  * - putc_unlocked
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/putc_unlocked.html>`__
+  * - putchar
+    - |check|
+    - 7.23.7.8
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/putchar.html>`__
+  * - putchar_unlocked
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/putchar_unlocked.html>`__
+  * - puts
+    - |check|
+    - 7.23.7.9
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/puts.html>`__
+  * - remove
+    - |check|
+    - 7.23.4.1
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/remove.html>`__
+  * - rename
+    - |check|
+    - 7.23.4.2
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/rename.html>`__
+  * - renameat
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/renameat.html>`__
+  * - rewind
+    -
+    - 7.23.9.5
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/rewind.html>`__
+  * - scanf
+    - |check|
+    - 7.23.6.4
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/scanf.html>`__
+  * - setbuf
+    - |check|
+    - 7.23.5.5
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/setbuf.html>`__
+  * - setvbuf
+    - |check|
+    - 7.23.5.6
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/setvbuf.html>`__
+  * - snprintf
+    - |check|
+    - 7.23.6.5
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/snprintf.html>`__
+  * - sprintf
+    - |check|
+    - 7.23.6.6
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/sprintf.html>`__
+  * - sscanf
+    - |check|
+    - 7.23.6.7
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/sscanf.html>`__
+  * - tmpfile
+    -
+    - 7.23.4.3
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/tmpfile.html>`__
+  * - tmpnam
+    -
+    - 7.23.4.4
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/tmpnam.html>`__
+  * - ungetc
+    - |check|
+    - 7.23.7.10
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/ungetc.html>`__
+  * - vdprintf
+    -
+    -
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/vdprintf.html>`__
+  * - vfprintf
+    - |check|
+    - 7.23.6.8
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/vfprintf.html>`__
+  * - vfscanf
+    - |check|
+    - 7.23.6.9
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/vfscanf.html>`__
+  * - vprintf
+    - |check|
+    - 7.23.6.10
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/vprintf.html>`__
+  * - vscanf
+    - |check|
+    - 7.23.6.11
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/vscanf.html>`__
+  * - vsnprintf
+    - |check|
+    - 7.23.6.12
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/vsnprintf.html>`__
+  * - vsprintf
+    - |check|
+    - 7.23.6.13
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/vsprintf.html>`__
+  * - vsscanf
+    - |check|
+    - 7.23.6.14
+    - `POSIX.1-2024 <https://pubs.opengroup.org/onlinepubs/9799919799/functions/vsscanf.html>`__
diff --git a/libc/utils/docgen/stdio.yaml b/libc/utils/docgen/stdio.yaml
new file mode 100644
index 0000000000000..9dabee44a51c8
--- /dev/null
+++ b/libc/utils/docgen/stdio.yaml
@@ -0,0 +1,226 @@
+macros:
+  __STDC_VERSION_STDIO_H__:
+    c-definition: '7.23.1'
+  _IOFBF:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  _IOLBF:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  _IONBF:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  BUFSIZ:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  EOF:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  FOPEN_MAX:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  FILENAME_MAX:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  _PRINTF_NAN_LEN_MAX:
+    c-definition: '7.23.1'
+  L_tmpnam:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  L_ctermid:
+    in-latest-posix: ''
+  SEEK_CUR:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  SEEK_END:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  SEEK_SET:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  TMP_MAX:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  stderr:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  stdin:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+  stdout:
+    c-definition: '7.23.1'
+    in-latest-posix: ''
+functions:
+  remove:
+    c-definition: '7.23.4.1'
+    in-latest-posix: ''
+  rename:
+    c-definition: '7.23.4.2'
+    in-latest-posix: ''
+  tmpfile:
+    c-definition: '7.23.4.3'
+    in-latest-posix: ''
+  tmpnam:
+    c-definition: '7.23.4.4'
+    in-latest-posix: ''
+  fclose:
+    c-definition: '7.23.5.1'
+    in-latest-posix: ''
+  fflush:
+    c-definition: '7.23.5.2'
+    in-latest-posix: ''
+  fopen:
+    c-definition: '7.23.5.3'
+    in-latest-posix: ''
+  freopen:
+    c-definition: '7.23.5.4'
+    in-latest-posix: ''
+  setbuf:
+    c-definition: '7.23.5.5'
+    in-latest-posix: ''
+  setvbuf:
+    c-definition: '7.23.5.6'
+    in-latest-posix: ''
+  fprintf:
+    c-definition: '7.23.6.1'
+    in-latest-posix: ''
+  fscanf:
+    c-definition: '7.23.6.2'
+    in-latest-posix: ''
+  printf:
+    c-definition: '7.23.6.3'
+    in-latest-posix: ''
+  scanf:
+    c-definition: '7.23.6.4'
+    in-latest-posix: ''
+  snprintf:
+    c-definition: '7.23.6.5'
+    in-latest-posix: ''
+  sprintf:
+    c-definition: '7.23.6.6'
+    in-latest-posix: ''
+  sscanf:
+    c-definition: '7.23.6.7'
+    in-latest-posix: ''
+  vfprintf:
+    c-definition: '7.23.6.8'
+    in-latest-posix: ''
+  vfscanf:
+    c-definition: '7.23.6.9'
+    in-latest-posix: ''
+  vprintf:
+    c-definition: '7.23.6.10'
+    in-latest-posix: ''
+  vscanf:
+    c-definition: '7.23.6.11'
+    in-latest-posix: ''
+  vsnprintf:
+    c-definition: '7.23.6.12'
+    in-latest-posix: ''
+  vsprintf:
+    c-definition: '7.23.6.13'
+    in-latest-posix: ''
+  vsscanf:
+    c-definition: '7.23.6.14'
+    in-latest-posix: ''
+  fgetc:
+    c-definition: '7.23.7.1'
+    in-latest-posix: ''
+  fgets:
+    c-definition: '7.23.7.2'
+    in-latest-posix: ''
+  fputc:
+    c-definition: '7.23.7.3'
+    in-latest-posix: ''
+  fputs:
+    c-definition: '7.23.7.4'
+    in-latest-posix: ''
+  getc:
+    c-definition: '7.23.7.5'
+    in-latest-posix: ''
+  getchar:
+    c-definition: '7.23.7.6'
+    in-latest-posix: ''
+  putc:
+    c-definition: '7.23.7.7'
+    in-latest-posix: ''
+  putchar:
+    c-definition: '7.23.7.8'
+    in-latest-posix: ''
+  puts:
+    c-definition: '7.23.7.9'
+    in-latest-posix: ''
+  ungetc:
+    c-definition: '7.23.7.10'
+    in-latest-posix: ''
+  fread:
+    c-definition: '7.23.8.1'
+    in-latest-posix: ''
+  fwrite:
+    c-definition: '7.23.8.2'
+    in-latest-posix: ''
+  fgetpos:
+    c-definition: '7.23.9.1'
+    in-latest-posix: ''
+  fseek:
+    c-definition: '7.23.9.2'
+    in-latest-posix: ''
+  fsetpos:
+    c-definition: '7.23.9.3'
+    in-latest-posix: ''
+  ftell:
+    c-definition: '7.23.9.4'
+    in-latest-posix: ''
+  rewind:
+    c-definition: '7.23.9.5'
+    in-latest-posix: ''
+  clearerr:
+    c-definition: '7.23.10.1'
+    in-latest-posix: ''
+  feof:
+    c-definition: '7.23.10.2'
+    in-latest-posix: ''
+  ferror:
+    c-definition: '7.23.10.3'
+    in-latest-posix: ''
+  perror:
+    c-definition: '7.23.10.4'
+    in-latest-posix: ''
+  ctermid:
+    in-latest-posix: ''
+  dprintf:
+    in-latest-posix: ''
+  fdopen:
+    in-latest-posix: ''
+  fileno:
+    in-latest-posix: ''
+  flockfile:
+    in-latest-posix: ''
+  fmemopen:
+    in-latest-posix: ''
+  fseeko:
+    in-latest-posix: ''
+  ftello:
+    in-latest-posix: ''
+  ftrylockfile:
+    in-latest-posix: ''
+  funlockfile:
+    in-latest-posix: ''
+  getdelim:
+    in-latest-posix: ''
+  getline:
+    in-latest-posix: ''
+  open_memstream:
+    in-latest-posix: ''
+  pclose:
+    in-latest-posix: ''
+  popen:
+    in-latest-posix: ''
+  putc_unlocked:
+    in-latest-posix: ''
+  putchar_unlocked:
+    in-latest-posix: ''
+  renameat:
+    in-latest-posix: ''
+  vdprintf:
+    in-latest-posix: ''