[Cygwinners: Taking this to the Libtool lists]
[Libtoolers: Following up on a post on the cygwin mailing list]

On 2012-08-19 19:03, Andreas Schiffler wrote:
> The libtool distributed with cygwin has a bug that prevents use in paths containing spaces.
> This was encountered when trying to build SDL2 on Windows (see http://bugzilla.libsdl.org/show_bug.cgi?id=1575 for details or repro).
> 
> # Which release of libtool.m4 was used?
> macro_version=2.2.6
> macro_revision=1.3012
> 
> The fix is simple: add additional quoting.
> 
> $ diff libtool libtool-fixed
> 2797c2797
> <       exec_cmd='$SHELL $progpath $preserve_args --finish$current_libdirs'
> ---
>>       exec_cmd='$SHELL "$progpath" $preserve_args --finish$current_libdirs'
> 8321c8321
> <       if test "X$ECHO" = "X$SHELL $progpath --fallback-echo"; then
> ---
>>       if test "X$ECHO" = "X$SHELL \"$progpath\" --fallback-echo"; then
> 8323,8324c8323,8324
> <       [\\/]* | [A-Za-z]:[\\/]*) qecho="$SHELL $progpath --fallback-echo";;
> <       *) qecho="$SHELL `pwd`/$progpath --fallback-echo";;
> ---
>>       [\\/]* | [A-Za-z]:[\\/]*) qecho="$SHELL \"$progpath\" --fallback-echo";;
>>       *) qecho="$SHELL `pwd`/\"$progpath\" --fallback-echo";;
> 8559c8559
> <       relink_command="(cd `pwd`; $SHELL $progpath $preserve_args --mode=relink $libtool_args @inst_prefix_dir@)"
> ---
>>       relink_command="(cd `pwd`; $SHELL \"$progpath\" $preserve_args --mode=relink $libtool_args @inst_prefix_dir@)"

The code changed in the two middle hunks went out after 2.2.6 and
are thus gone in 2.2.8 and later, so that no longer applies.

I also took the liberty of changing ltmain.m4sh instead of the
generated libtool script.

So, this is a better attempt for a patch, with Andreas added to
THANKS.

Ok to push?

Cheers,
Peter