Error when building executable with profiling enabled
Hello, i have an executable where i want to run profiling on. I do: ghc --make -prof -auto-all -fth Custom.hs but it does not built and the output is: bench\HLogo\Custom\Custom.hs:1:1: Dynamic linking required, but this is a non-standard build (eg. prof). You need to build the program twice: once the normal way, and then in the desired way using -osuf to set the object file suffix. I tried googling on the error with no success. What can I do to compile this file for profiling? Cheers, Nikos
You are using TemplateHaskell (-fth switch) which can be tricky. Please see
this documentation on profiling with TH:
http://www.haskell.org/ghc/docs/7.6.1/html/users_guide/template-haskell.html....
Other than following the documentation I would recommend using Cabal
which handles the necessary flags and double-compilation process itself.
Best regards,
Krzysztof Skrzętnicki
On Fri, Apr 5, 2013 at 4:41 PM, Nikolaos Bezirgiannis
Hello,
i have an executable where i want to run profiling on.
I do:
ghc --make -prof -auto-all -fth Custom.hs
but it does not built and the output is:
bench\HLogo\Custom\Custom.hs:1:1: Dynamic linking required, but this is a non-standard build (eg. prof). You need to build the program twice: once the normal way, and then in the desired way using -osuf to set the object file suffix.
I tried googling on the error with no success. What can I do to compile this file for profiling?
Cheers, Nikos
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I switched to profiling through Cabal as you suggested, but now I have the error: bench\HLogo\Custom\Custom.hs:1:1: cannot find normal object file `dist\build\custom\custom-tmp\Framework\Keyword.o' while linking an interpreted expression So, I removed managing the executables directly from Cabal (--enable-executable-profiling) , and only enabled library profiling. Then I manually compiled each executable twice as: ghc --make Custom.hs ghc --make -prof -osuf p_o Custom.hs Profiling now works. Thank you. Regards, Nikos
Krzysztof Skrzętnicki
see this documentation on profiling with TH: http://www.haskell.org/ghc/docs/7.6.1/html/users_guide/template-haskell.html...
"GHC cannot load the profiled object code and use it when executing the splices." That means I do not get profiling information for the code that gets spliced in? Or for the code that is producing the splice? What's the work-around for the first case? (short of -ddump-splices, which seems somewhat problematic, according to http://hackage.haskell.org/trac/ghc/ticket/5016 ) - J.W.
participants (3)
-
Johannes Waldmann -
Krzysztof Skrzętnicki -
Nikolaos Bezirgiannis