SQLite

    # Library-level features and defaults
    lib-features {
      {*} {
        threadsafe=1         => {Disable mutexing}
        with-tempstore:=no   => {Use an in-RAM database for temporary tables: never,no,yes,always}
        load-extension=1     => {Disable loading of external extensions}
        # ^^^ one of the downstream custom builds overrides the load-extension default to 0, which
        # confuses the --help text generator. https://github.com/msteveb/autosetup/issues/77
        math=1               => {Disable math functions}
        json=1               => {Disable JSON functions}
        memsys5              => {Enable MEMSYS5}
        memsys3              => {Enable MEMSYS3}
        fts3                 => {Enable the FTS3 extension}
        fts4                 => {Enable the FTS4 extension}
        fts5                 => {Enable the FTS5 extension}

              If not provided, "libsqlite3" is usually assumed but on some platforms
              a platform-dependent default is used. On some platforms this flag
              gets automatically enabled if it is not provided. Use "default" to
              explicitly disable platform-dependent activation on such systems.}
        # out-implib: https://sqlite.org/forum/forumpost/0c7fc097b2
        out-implib:=auto
          => {Enable use of --out-implib linker flag to generate an
              "import library" for the DLL. The output's base name is
              specified by this flag's value, with "auto" meaning to figure
              out a name automatically. On some platforms this flag gets
              automatically enabled if it is not provided. Use "none" to
              explicitly disable this feature on such platforms.}
      }
    }

    # Options mostly for sqlite's own development
    developer {

      }
      {*} {
        dump-defines=0
          => {Dump autosetup defines to $::sqliteConfig(dump-defines-txt)
              (for build debugging)}
      }
    }
  }; # $allFlags

  set allFlags [proj-strip-hash-comments $allFlags]
  # ^^^ lappend of [sqlite-custom-flags] introduces weirdness if
  # we delay [proj-strip-hash-comments] until after that.

  if {[llength [info proc sqlite-custom-flags]] > 0} {
    # sqlite-custom-flags is assumed to be imported via a
    # client-specific import: autosetup/local.tcl, autosetup/*.auto,
    # or autosetup/*/*.auto.
    lappend allFlags sqlite-custom-flags [sqlite-custom-flags]
  }

  # Filter allFlags to create the set of [options] legal for this build
  set opts {}
  foreach {group XY} [subst -nobackslashes -nocommands \
                        [proj-strip-hash-comments $allFlags]] {
    foreach {X Y} $XY {
      if { $buildMode in $X || "*" in $X } {
        foreach y $Y {
          lappend opts $y

        }
      }
    }
  }
  if {$found} {
    msg-result "Loadable extension support enabled."
  } else {
    msg-result "Disabling loadable extension support. Use --enable-load-extension to enable them."
    sqlite-add-feature-flag {-DSQLITE_OMIT_LOAD_EXTENSION=1}
  }
  return $found
}

########################################################################
# Handles the --enable-math flag.

      }]
      proj-opt-set dll-basename auto
    }
  }
  sqlite-handle-dll-basename
  sqlite-handle-out-implib
  sqlite-handle-mac-cversion
  if {[llength [info proc sqlite-handle-custom-flags]] > 0} {
    # sqlite-handle-custom-flags is assumed to be imported via a
    # client-specific import: autosetup/local.tcl, autosetup/*.auto,
    # or autosetup/*/*.auto.
    sqlite-handle-custom-flags
  }
}

########################################################################
# Perform some late-stage work and generate the configure-process
# output file(s).
proc sqlite-process-dot-in-files {} {
  ########################################################################