On Thu, Nov 18, 2010 at 02:11:21PM -0600, Peter Samuelson wrote:
> 
> [s...@apache.org]
> >  swig-pl: $(swig-pl_DEPS)
> > -   if test "$(SWIG_PL_DIR)" != "$(SWIG_PL_SRC_DIR)"; then \
> > +   if test "`$(READLINK) $(SWIG_PL_DIR)`" != "`$(READLINK) 
> > $(SWIG_PL_SRC_DIR)`"; then \
> 
> Does everyone have pwd -P?  Seems to be specified by POSIX.  That seems
> like a pretty good 'readlink' to me:
> 
>       if test "$$(cd $(SWIG_PL_DIR); pwd -P)" != "$$(cd $(SWIG_PL_SRC_DIR); 
> pwd -P)"; then

I considered that, too. But I don't know if everyone has that.
OpenBSD has it implemented but it's intenionally not documented.
The pwd source says:
  "The POSIX 1003.2B/D9 document has an optional -P flag"
Note the word "optional".

I guess the python libraries really are more reliable in this case.

Stefan

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