On Wed, Jun 10, 2015 at 12:18 AM, Ranjit Jhala <jh...@cs.ucsd.edu> wrote:
> Hi all, > > I cannot build 'vector' (or 'cmdargs') with profiling on. > The short answer is: Never use --ghc-options="-prof". Cabal knows to use -prof to build profiling libraries and profiled executables, and will handle everything correctly automatically. If you remove the "-prof" part from the --ghc-options in your original command, vector will build with profiling correctly. The longer explanation is: vector uses Template Haskell which can only load the dynamic, unprofiled version of a library. In order to build vector in any configuration, its dependencies therefore need to have been built in at least the dynamic & unprofiled configuration. vector itself must also be built in the dynamic & unprofiled configuration, in case one module in vector runs a Template Haskell containing identifiers defined in another module in vector. Cabal is capable of building both the dynamic & unprofiled and static & profiled configurations of vector and its dependencies simultaneously by default. However, if you explicitly add --ghc-options=-prof, then you defeat Cabal's attempt to build the dynamic & unprofiled configuration. > specifically when I run: > > $ cabal install --enable-executable-profiling > --enable-library-profiling --ghc-options="-O2 -rtsopts -prof -auto-all > -caf-all" vector > > > I get the message: > > Perhaps you haven't installed the "p_dyn" libraries for package > ‛integer-gmp’ > Right, by default ghc does not ship with dynamic & profiled libraries, so this will fail very quickly when Cabal tries to build a dynamic & unprofiled library, but you told it to also pass -prof to ghc. > Per some advice I tried to add the '--disable-shared' > > > $ cabal install --disable-shared --enable-executable-profiling > --enable-library-profiling --ghc-options="-O2 -rtsopts -prof -auto-all > -caf-all" vector > > but then I get this: > > Loading package primitive-0.6 ... <command line>: can't load .so/.DLL > for: libHSprimitive-0.6.dylib (dlopen(libHSprimitive-0.6.dylib, 9): image > not found) > This can't work because you need dynamic versions of vector's dependencies for Template Haskell, but you disabled building them with --disable-shared. Regards, Reid Barton
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