changequote(",")
changequote(``,'')

include(stdio.m4)
--- begin noexist test ---
FILEEXIST(fish-not-exist)
--- end noexist test ---
--- begin exist test ---
FILEEXIST(html.m4)
--- end exist test ---

-- begin ``STDIO_NO'' --
STDIO_NO
-- end ``STDIO_NO'' --

-- begin ``STDIO_YES'' --
STDIO_YES
-- end ``STDIO_YES'' --

fish-no-exist existence: stdio_ok(FILEEXIST(fish-not-exist),Yes,No)
html.m4 existence: stdio_ok(FILEEXIST(html.m4),Yes,No)

File size of html.m4: FILESIZE(html.m4)

File date of html.m4: FILEDATE(html.m4)