TEST_NT hack and OpenBSD

[Bruno H. <br...@cl...>]

Hi Sam,

On OpenBSD 7 the usual /usr/bin/make gives a syntax error with
clisp's generated Makefile, on this line:

.SHELL: name=sh path=$(SHELL)

(Syntax error at 'name=sh'.)

This comes from makemake.in:

  # netbsd make ignores the SHELL macro, so we need to use a special
  # target to tell it to respect our shell setting
  # this is important because if configure uses bash and detects TEST_NT=yes,
  # but make uses sh that does not support "test -nt", modules will not build
  case "$host_os" in
    *bsd*) echol '.SHELL: name=sh path=$(SHELL)' ;;
  esac

The comments indicate that this is to make TEST_NT work across different shells.

But

1) 'test file1 -nt -file2' is not standardized by POSIX [1], therefore better
   not rely on it.

2) I don't see anything that uses it.

So I propose to remove this SHELL hack, remove the TEST_NT invocation, and
remove the test.m4 file.

Or, if I overlooked something and it is still needed, limit it to
*freebsd* and *netbsd*.

Bruno

[1] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html#tag_20_128