Bad control characters in GHCi 6.6 (Mac OS X PPC)

[Thorkil Naur]

Hello,

I am trying to reproduce the problem reported as "#898: GHC compiles against 
Apple's readline, giving error". On my PPC Mac OS X 10.3 Panther, however, I 
have managed to build ghc-6.6 without running into this particular problem. 
Initially without gnu readline, the resulting GHCi is, of course, without 
readline support. And after installing readline 5.1 via Darwin/MacPorts 
into /opt/local, I can re-build and this time get a GHCi with readline 
support, provided I "./configure --with-readline-includes=/opt/local/include/ 
--with-readline-libraries=/opt/local/lib".

The reason for the error is stated as "The bug is really that Apple symlinks 
libreadline to libedit", but my system does not contain such a symlink. Is it 
possible to set up this masquerading on a Mac OS X 10.3? Or would I need to 
upgrade to 10.4? Or could something else again be required?

Thanks and regards
Thorkil

On Saturday 04 November 2006 00:14, Deborah Goldsmith wrote:
> On Oct 30, 2006, at 2:40 PM, Deborah Goldsmith wrote:
> > I think I have this partially figured out.
> 
> The following patch to libraries/readline/configure.ac seems to do  
> the trick for Darwin:
> 
> --- configure.ac.save   2006-10-10 12:09:04.000000000 -0700
> +++ configure.ac        2006-11-02 17:32:50.000000000 -0800
> @@ -43,7 +43,10 @@
> dnl ** is our readline really readline, or is it BSD's libedit?
> if test x"$HaveLibReadline" = xYES ; then
> -  AC_CHECK_LIB(readline, rl_readline_version, ReadlineIsLibedit=NO,  
> ReadlineIsLibedit=YES)
> +  AC_CHECK_DECL(rl_readline_version, ReadlineIsLibedit=NO,  
> ReadlineIsLibedit=YES,
> +[#include <stdio.h>
> +#include <readline/readline.h>
> +])
> fi
> if test $HaveLibTermcap = YES && test x"$HaveLibReadline" = xYES &&  
> test x"$ReadlineIsLibedit" = xNO ; then
> @@ -56,9 +59,12 @@
> AC_SUBST(READLINE_LIBS)
> if test x"$HaveLibReadline" = xYES && test x"$ReadlineIsLibedit" =  
> xNO ; then
> -  AC_CHECK_LIB(readline, rl_erase_empty_line,
> +  AC_CHECK_DECL(rl_erase_empty_line,
>       [AC_DEFINE([HAVE_READLINE_4], [1], [Define to 1 if readline has  
> version >= 4.0.])],
> -    [AC_DEFINE([HAVE_READLINE_4], [0], [Define to 1 if readline has  
> version >= 4.0.])])
> +    [AC_DEFINE([HAVE_READLINE_4], [0], [Define to 1 if readline has  
> version >= 4.0.])],
> +[#include <stdio.h>
> +#include <readline/readline.h>
> +])
>     AC_CHECK_LIB(readline, rl_free_undo_list,
>       [AC_DEFINE([HAVE_READLINE_4_2], [1], [Define to 1 if readline  
> has version >= 4.2.])],
>       [AC_DEFINE([HAVE_READLINE_4_2], [0], [Define to 1 if readline  
> has version >= 4.2.])])
> 
> When I build with this patch after configuring to look for GNU  
> readline in /usr/local, everything works. I don't know if this  
> particular patch will work well on other systems. Maybe folks could  
> try it out?
> 
> Thanks,
> Deborah
> 
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