Re: `cp -l` doesn't work correctly on some macOS versions

[Paul Eggert]

On 2/2/24 12:20, Russ Allbery wrote:
> I thought ln <target> <link> || ln -s <target> <link> was the standard
> recipe here

Yes, "cp -l" isn't required by POSIX and is not portable in general. For 
example, on AIX 7.1:

  $ cp -l a b
  cp: Not a recognized flag: l
  Usage: cp [-fhipHILPU][-d|-e] [-r|-R] [-E{force|ignore|warn}] [--] 
src target
     or: cp [-fhipHILPU] [-d|-e] [-r|-R] [-E{force|ignore|warn}] [--] 
src1 ... srcN directory

Autoconf provides AC_PROG_LN_S, which is supposed to be even more 
portable than the recipe you gave.