Hi all, I am really stuck with my try to make a Haskell binding for the library bayesopt on Windows. In theory it looks all simple, just put some lines in the cabal configuration file: ... extra-lib-dirs: /path/to/the/lib -- contains the file libbayesopt.a extra-libraries: bayesopt ... But whatever I tried, I can't step over the configuration phase, coz I get (I'm compiling with stack): Configuring BaseOh-0.1.0.0... setup-Simple-Cabal-1.22.5.0-x86_64-windows-ghc-7.10.3.exe: Missing dependency on a foreign library: * Missing C library: /j/BO/lib/libbayesopt.a This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is. If I comment those lines out, then the configure phase succeeds, the library is compiled (i.e. my binding library), but a test executable in the same project does of course not compile, as symbols are missing: ... In-place registering BaseOh-0.1.0.0... Preprocessing executable 'test' for BaseOh-0.1.0.0... [1 of 2] Compiling Optimisation.Stochastic.BayesOpt ( src\Optimisation\Stochasti c\BayesOpt.hs, .stack-work\dist\x86_64-windows\Cabal-1.22.5.0\build\test\test-tm p\Optimisation\Stochastic\BayesOpt.o ) ghc.exe: unable to load package `BaseOh-0.1.0.0' ghc.exe: J:\Projects\BaseOh\.stack-work\dist\x86_64-windows\Cabal-1.22.5.0\build \HSBaseOh-0.1.0.0-GdNObdePATgDIW1I2OVwEc.o: unknown symbol `initialize_parameter s_to_default' -- While building package BaseOh-0.1.0.0 using: ... Does somebody have some idea, what is going on? I am on Win 7, using stack (configured for lts-4.2) under MinGW. (I'm using inline-c to make the bindings, and the same trick for include - include-dirs: ... - worked fine.) Thanks, and sorry for the longer email. Nicu