On 7/18/08, Andrew Hunter
The documentation does *not*, however, say (anywhere I can find) how to do this! My natural guess was to go into mk/build.mk, and add -ticky to GhcLibHcOpts, but that didn't work (regardless of whether I had previously built a ticky rts, this produced a multitude of linker errors.) I also tried, on a lark, adding "t" to GhcLibWays, and this didn't die, but I'm unclear if it...did anything at all, really. I see no way to really tell one way or another.
Hi, Andrew-- I'm not surprised that building the libraries with ticky enabled doesn't work, because when I fixed ticky-ticky profiling a year and a half ago after it was bit-rotted, I hardly tested it and all and certainly didn't try building the ticky libraries. If I try "make way=t" in libraries/, which should be the proper way to build the ticky libraries, I get errors, so I'm surprised it succeeded for you (unless the build system thought that the libraries were up-to-date and didn't try building the ticky version.) The reason you got linker errors was because, I assume, you had compiled the libraries with -ticky but you weren't passing the -ticky flag to GHC when you compiled your program. If you don't pass the -ticky flag, GHC doesn't link with the ticky RTS, so the library code will include all sorts of undefined symbols. But since you said below that it's OK if things are broken for non-ticky use, you should just be able to do: $ cd libraries/ $ make clean $ make EXTRA_HC_OPTS=-ticky $ cd [wherever] $ ghc -o foo -ticky foo.hs $ ./foo +RTS -rfoo.ticky -RTS and foo.ticky will contain your profiling report. You just won't be able to compile any programs without -ticky this way. In the meantime, I'll look into making the "ticky" way work so that it'll be possible to have ticky and non-ticky libraries coexisting. If you have any more questions about ticky-ticky profiling, please CC both me and this list, since I don't always read the list carefully. Cheers, Tim -- Tim Chevalier * http://cs.pdx.edu/~tjc * Often in error, never in doubt "Faith, faith is an island in the setting sun / But proof, yes, proof is the bottom line for everyone."--Paul Simon