Re: Wrong AC_PROG_LN_S test on MSYS with 2.68

[Adrian Bunk]

Thanks for your bug report.

The issue you report was already fixed in autoconf 2.69:

- AC_PROG_LN_S and AS_LN_S now fall back on 'cp -pR' (not 'cp -p') if 'ln -s'
  does not work.  This works better for symlinks to directories.

http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=17ea0df46f819a9b64c21151983a5c5b8561fefb

cu
Adrian


On Sat, Sep 22, 2012 at 05:58:45PM +0200, address@hidden wrote:
> Dear Sir or Madam,
>  
> running autoconf (GNU Autoconf) 2.68 obtained from
> http://sourceforge.net/projects/mingw/files/MinGW/Extension/autoconf/autoconf2.5/autoconf2.5-2.68-1/
> with the following configure.ac:
>  
> AC_PREREQ(2.64)
> AC_INIT
> AC_PROG_LN_S
>  
> leads to a wrongly created configure file that contains:
>  
> if (echo >conf$$.file) 2>/dev/null; then
>  if ln -s conf$$.file conf$$ 2>/dev/null; then
>  as_ln_s='ln -s'
>  # ... but there are two gotchas:
>  # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
>  # 2) DJGPP < 2.04 has no symlinks; `ln -s' .
>  # In both cases, we have to default to `cp -p'.
>  ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
>  as_ln_s='cp -p'
>  elif ln conf$$.file conf$$ 2>/dev/null; then
>  as_ln_s=ln
>  else
>  as_ln_s='cp -p'
>  fi
> else
>  as_ln_s='cp -p'
> fi
>  
> This is wrong as cp -p does not replace ln or ln -s on MSYS for directories. 
> A better replacement could be cp -pr.
> Please consider this change in the upcoming releases.
>  
> Best regards,
> Daniel Starke