diff --git a/Formula/m/mandoc.rb b/Formula/m/mandoc.rb
new file mode 100644
index 00000000000..e27195839cd
--- /dev/null
+++ b/Formula/m/mandoc.rb
@@ -0,0 +1,87 @@
+class Mandoc < Formula
+  desc "UNIX manpage compiler toolset"
+  homepage "https://mandoc.bsd.lv/"
+  url "https://mandoc.bsd.lv/snapshots/mandoc-1.14.6.tar.gz"
+  sha256 "8bf0d570f01e70a6e124884088870cbed7537f36328d512909eb10cd53179d9c"
+  license "ISC"
+  revision 1
+  head "anoncvs@mandoc.bsd.lv:/cvs", using: :cvs
+
+  livecheck do
+    url "https://mandoc.bsd.lv/snapshots/"
+    regex(/href=.*?mandoc[._-]v?(\d+(?:\.\d+)+)\.t/i)
+  end
+
+  bottle do
+    root_url "https://github.com/gromgit/homebrew-core-aarch64_linux/releases/download/mandoc-1.14.6"
+    sha256 cellar: :any_skip_relocation, aarch64_linux: "ffd5ecbc5673d6a71262d4c61ce14212546031a198414b11269a6262e0a41fc0"
+  end
+
+  uses_from_macos "zlib"
+
+  def install
+    localconfig = [
+
+      # Sane prefixes.
+      "PREFIX=#{prefix}",
+      "INCLUDEDIR=#{include}",
+      "LIBDIR=#{lib}",
+      "MANDIR=#{man}",
+      "WWWPREFIX=#{prefix}/var/www",
+      "EXAMPLEDIR=#{share}/examples",
+
+      # Executable names, where utilities would be replaced/duplicated.
+      # The mandoc versions of the utilities are definitely *not* ready
+      # for prime-time on Darwin, though some changes in HEAD are promising.
+      # The "bsd" prefix (like bsdtar, bsdmake) is more informative than "m".
+      "BINM_MAN=bsdman",
+      "BINM_APROPOS=bsdapropos",
+      "BINM_WHATIS=bsdwhatis",
+      "BINM_MAKEWHATIS=bsdmakewhatis", # default is "makewhatis".
+      "BINM_SOELIM=bsdsoelim", # conflicts with groff's soelim
+
+      # These are names for *section 7* pages only. Several other pages are
+      # prefixed "mandoc_", similar to the "groff_" pages.
+      "MANM_MAN=man",
+      "MANM_MDOC=mdoc",
+      "MANM_ROFF=mandoc_roff", # This is the only one that conflicts (groff).
+      "MANM_EQN=eqn",
+      "MANM_TBL=tbl",
+
+      # Not quite sure what to do here. The default ("/usr/share", etc.) needs
+      # sudoer privileges, or will error. So just brew's manpages for now?
+      "MANPATH_DEFAULT=#{HOMEBREW_PREFIX}/share/man",
+
+      "HAVE_MANPATH=0",   # Our `manpath` is a symlink to system `man`.
+      "STATIC=",          # No static linking on Darwin.
+
+      "HOMEBREWDIR=#{HOMEBREW_CELLAR}", # ? See configure.local.example, NEWS.
+      "BUILD_CGI=1",
+    ]
+
+    # Bottom corner signature line.
+    localconfig << if OS.mac?
+      "OSNAME='macOS #{MacOS.version}'"
+    else
+      "OSNAME='Linux'"
+    end
+
+    File.rename("cgi.h.example", "cgi.h") # For man.cgi
+
+    (buildpath/"configure.local").write localconfig.join("\n")
+    system "./configure"
+
+    # I've tried twice to send a bug report on this to tech@mdocml.bsd.lv.
+    # In theory, it should show up with:
+    # search.gmane.org/?query=jobserver&group=gmane.comp.tools.mdocml.devel
+    ENV.deparallelize do
+      system "make"
+      system "make", "install"
+    end
+  end
+
+  test do
+    system bin/"mandoc", "-Thtml",
+      "-Ostyle=#{share}/examples/example.style.css", "#{man1}/mandoc.1"
+  end
+end