[Haskell-cafe] Adding a custom lib to stack project

[Yotam Ohad]

Thanks for the reply.
I've added extra-libraries to package.yaml.
Now though, I'm getting a missing C library error (although `stack path
--extra-library-dirs` prints the directory of the .lib file)

Yotam

‫בתאריך יום ג׳, 11 בספט׳ 2018 ב-10:03 מאת ‪Phyx‬‏ <‪lonetiger at gmail.com‬‏>:‬

> Hi,
>
> I assume CreateDebuggedProcess is defined in bindings.lib? You need to
> also add extra-libraries: bindings
>
> Also keep in mind that C++ has a different name mangling than C, so if
> your function is in a class you'll need to use the proper name for it.
>
> nm -g bindings.lib would show the actual name.
>
> Tamar.
>
> On Tue, Sep 11, 2018, 07:51 Yotam Ohad <yotam2206 at gmail.com> wrote:
>
>> Hi,
>>
>> I made a lib from a  cpp project with one function: BOOL Foo(LPCSTR bar)
>> In the stack project I added the .lib file's folder to the
>> extra-lib-dirs/extra-include-dirs and then, in main:
>>
>> {-# LANGUAGE ForeignFunctionInterface #-}
>>
>> module Main where
>>
>> import System.Win32.Types
>> import Foreign.C.String
>>
>> main :: IO ()
>> main = do
>>     withCString "bar" c_Foo
>>     putStrLn "success"
>>
>> foreign import ccall "bindings.lib Foo"
>>     c_Foo :: LPCSTR -> IO BOOL
>>
>> When building I get the following error
>> Building all executables for `tape' once. After a successful build of all
>> of them, only specified executables will be rebuilt.
>> tape-0.1.0.0: build (lib + exe)
>> Preprocessing library for tape-0.1.0.0..
>> Building library for tape-0.1.0.0..
>> ignoring (possibly broken) abi-depends field for packages
>> Preprocessing executable 'tape-exe' for tape-0.1.0.0..
>> Building executable 'tape-exe' for tape-0.1.0.0..
>> Linking .stack-work\dist\7d103d30\build\tape-exe\tape-exe.exe ...
>> .stack-work\dist\7d103d30\build\tape-exe\tape-exe-tmp\Main.o:fake:(.text+0x102):
>> undefined reference to `CreateDebuggedProcess'
>> collect2.exe: error: ld returned 1 exit status
>> `gcc.exe' failed in phase `Linker'. (Exit code: 1)
>>
>> --  While building custom Setup.hs for package tape-0.1.0.0 using:
>>
>> C:\sr\setup-exe-cache\x86_64-windows\Cabal-simple_Z6RU0evB_2.2.0.1_ghc-8.4.3.exe
>> --builddir=.stack-work\dist\7d103d30 build lib:tape exe:tape-exe
>> --ghc-options " -ddump-hi -ddump-to-file -fdiagnostics-color=always"
>>     Process exited with code: ExitFailure
>>
>> What am I doing wrong?
>> Yotam
>>
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