Re: Removal of #include <HsFFI.h> from template-hsc.h breaks largefile support on 32bit Linux

I have similar issues to this in jhc due to its pervasive caching of compilation results. Basically I must keep track of any potentially ABI-changing flags and ensure they are consistently passed to every compilation unit and include them in the signature hash along with the file contents. I make sure to always pass said flags on the command line to all the tools, as in -D_FILE_OFFSET_BITS=64 gets passed to both gcc and hsc2hs rather than relying on a config file. John