On Sat, Jan 31, 2009 at 01:51:54AM +0100, Krzysztof Skrz??tnicki wrote:
The following change in .cabal file may solve the problems:--- flag base4 description: Choose base-4 if possible default: True
library if flag(splitBase) if flag(base4) Build-Depends: base>=4, old-time, time, bytestring, containers, old-locale else Build-Depends: base>=3, old-time, time, bytestring, containers, old-locale else Build-Depends: base<3 Build-Depends: mtl, convertible >= 1.0.1, utf8-string ---
It works for me and I *think* will also work for other setups, most notably GHC 6.8.*.
Not out of the box. The base4 flag will be on by default for GHC 6.8.x too, and they'll get the base >= 4 dep, which will break. They'd have to configure with the option to disable a flag (-f -base4 if memory serves), which is neither intuitive nor automatic. The only option I would have is to disable all the new base 4 code and make everyone have a dep on base<4. That'd be a pity really; what's the point of a new base if nobody can use it? And annoying too, after I went to the effort to support it directly, without OldException or a dep on base<4. -- John