Hi, There are shortly going to be 2 projects that use Yhc.Core extensively, one of them even _not_ written by me! As such maybe now is the time to start taking our Core output a bit more seriously - so here are my proposals: 1) core=1 is the default for Scons, installed libraries contain .ycr files - Slower to compile the libraries (a bit) takes up more space (a few Mb) + useful for the Yhc.Core users 2) Make the -core plus lack of a .ycr file, or an old .ycr file, cause a file to be rebuilt. At the moment it only has an effect on newly built files. - more recompilation + but only for people who specify -core 3) Add a -corelink option, which implicitly issues -core, and after all the .ycr files have been generated, pulls them together into one big .yca file. + useful for Yhc.Core users 4) Add a -O option that calls Catch with the big .yca file after its be generated. + optimised binaries :) + can default to GHC -O2 when catch is unavailable In addition there will be another user of the Yhc.Core files, which will be announced shortly, but for which steps 1 through 3 would be really handy. So basically, only 1) hurts anyone, and not by that much. Does this seem fine to everyone? Thanks Neil