I’ve written a windows dll in Haskell. The calling program is written in Delphi (pascal). I want to profile this dll.

Because you don’t have a command line in a dll for +RTS… -RTS, I call the dll with  hs_init_ghc (a exported function in the dll). I had to translate some parts of rtsopts.h to Delphi.

Everyting seems okay. The program does not hang, no catastrophic failures.  When I start with the parameter for rtsoptions in hs_init_ghc I get:

with  -t --machine-readable ->machine readable overview on the screen.

with -B sounds the bell with each garbage collection,

and also  --info works as expected.

But when I call hs_init_ghc with rtsoptions  –h I get 3 lines with on each line:  Can’t open profiling report file <unknown>.hp. 

With –p I get missing profiling report <unknown>.prof

Any idea what I’am doing wrong?

Kees