Re: Linking with C++ produced by Visual Studio .NET on Windows XP?
Brian Hulley wrote: Thanks. The only problem is that dlltool doesn't work because I don't have cygwin installed. dlltool usually comes with the Windows distribution of GHC (at least GHC 6.4 and 6.4.1 have it; check gcc-lib directory). Cheers Cyril ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Linking with C++ produced by Visual Studio .NET on Windows XP?
Cyril Schmidt wrote:
Brian Hulley wrote:
Thanks. The only problem is that dlltool doesn't work because I don't
have
cygwin installed.
dlltool usually comes with the Windows distribution of GHC (at least
GHC 6.4 and 6.4.1 have it; check gcc-lib directory).
Thanks - I wonder why they didn't put all the binaries in the bin directory?
Anyway, I've added gcc-lib to my path and deleted the version of dlltool.exe
that I downloaded, but for some reason it won't link. I used the following
commands (as per your post):
C++ file adapted from default generated by VS DLL project:
TestDLL.cpp:
// TestDLL.cpp : Defines the entry point for the DLL application.
//
#include stdafx.h
BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
return TRUE;
}
int __stdcall cfun(int x){
return x * 3;
}
I built this with VS, then wrote a def file:
TestDLL.def:
LIBRARY TestDLL
EXPORTS
cfun
Then I generated the lib using:
dlltool -d TestDLL.def -l libTestDLL.a
Then I wrote a Haskell program Main.hs:
module Main where
import GHC.Exts
foreign import ccall cfun :: Int# - Int#
main = do
let a = cfun 10#
putStrLn $ show $ I# a
and compiled with
ghc -fglasgow-exts --make Main.hs -optl-lTestDLL -optl-L
but I now get an error message:
Linking ...
c:\ghc\ghc-6.4\gcc-lib\ld.exe: cannot find -lTestDLL
Any ideas?
Thanks, Brian.
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Re: Linking with C++ produced by Visual Studio .NET on Windows XP?
Brian Hulley wrote: and compiled with ghc -fglasgow-exts --make Main.hs -optl-lTestDLL -optl-L Oops! I see I missed out the . which I'd not realised was part of the command line (seems the linker need to be told explicity to look in the current directory also), so it links using: ghc -fglasgow-exts --make Main.hs -optl-lTestDLL -optl-L. I then copied Debug/TestDLL.dll into the current directory so that it is in the same directory as main.exe, but now I get an error when I run the application. It finds the dll ok, but then a dialog box pops up saying: The application failed to initialize properly (0xc07b) Any ideas? Thanks, Brian. ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Linking with C++ produced by Visual Studio .NET on Windows XP?
Brian Hulley wrote:
Brian Hulley wrote:
and compiled with
ghc -fglasgow-exts --make Main.hs -optl-lTestDLL -optl-L
Oops! I see I missed out the . which I'd not realised was part of
the command line (seems the linker need to be told explicity to look
in the current directory also), so it links using:
ghc -fglasgow-exts --make Main.hs -optl-lTestDLL -optl-L.
I then copied Debug/TestDLL.dll into the current directory so that it
is in the same directory as main.exe, but now I get an error when I
run the application. It finds the dll ok, but then a dialog box pops
up saying:
The application failed to initialize properly (0xc07b)
I found the answer. It seemed I didn't declare the C++ function properly.
The correct function definition is:
extern C __declspec(dllexport) int cfun(int x){
return x * 3;
}
so that the function name doesn't get mangled and it is exported.
Best regards,
Brian.
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Re: ghc and gcc-4
are there known problems with ghc-6.4.* and gcc-4.*? It seems that -O2 does not work (on i386), as gcc says something like Prologue junk. (Suse linux 10.0 comes with gcc-4.?`as default compiler). There may well be problems, yes. Have you tried 6.4.1? Or a STABLE snapshot? Did not help, I get the same behaviour with ghc-6.4.2.20060121-i386-unknown-linux -- -- Johannes Waldmann -- Tel/Fax (0341) 3076 6479/80 -- http://www.imn.htwk-leipzig.de/~waldmann/ --- ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: ghc and gcc-4
Johannes Waldmann wrote: are there known problems with ghc-6.4.* and gcc-4.*? It seems that -O2 does not work (on i386), as gcc says something like Prologue junk. (Suse linux 10.0 comes with gcc-4.?`as default compiler). There may well be problems, yes. Have you tried 6.4.1? Or a STABLE snapshot? Did not help, I get the same behaviour with ghc-6.4.2.20060121-i386-unknown-linux Can you run the offending command with -keep-raw-s-file, and send me the resulting .raw_s, please? Cheers, Simon ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
