[bug #67750] removal of special prefix chars under .ONESHELL breaks multi-line strings

anonymous <[email protected]> Mon, 1 Dec 2025 08:13:09 -0500 (EST)

Newsgroups	gmane.comp.gnu.make.bugs
Message-ID	<[email protected]>

Follow-up Comment #1, bug #67750 (group make):

Relatedly, make determines whether $(SHELL) is POSIX by comparing it with this
static list:

  /* List of known POSIX (or POSIX-ish) shells.  */
  static const char *unix_shells[] = {
    "sh",
    "bash",
    "dash",
    "ksh",
    "rksh",
    "zsh",
    "ash",
    NULL
  };

I've suggested in the past that this list become makefile-overridable. My
situation is a little different from yours; I have a shell "mdsh" which *is*
POSIX-compatible but isn't recognized as such so I've been reduced to making a
symlink rksh -> mdsh and invoking it under that name in .ONESHELL
environments. This kind-of works because hardly anyone ever wants to use the
real rksh but it's pretty ugly and non-obvious.

I think both your problem and mine could be at least partially alleviated by
allowing the makefile to say what it considers a POSIX shell.


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