Have you tried to use ocpwin ?

--Fabrice

On Wed, Mar 30, 2016 at 6:25 PM Pang, Wai (CA-CIB) <Wai.Pang@ca-cib.com>
wrote:

> Has anyone tried compiling FindLib with the visual studio 2012 or later.
>
>
>
> This is ok with visual studio 2008 and an old version of ocaml 3.11.
>
> I have also tried the most recent release tar balls of ocaml and flex
> without any success.
>
>
>
> FindLib package has a prebuild configuration to test loading dlls as:
>
>
>
> *ocaml unix.cma*  - > fails with Reason: .\dllunix.dll: Invalid access to
> memory location.
>
>
>
> (This command line routine has a dependency of ocamlrun.exe, pervasive.cma
> and dllunix.dll
>
> which I have compiled all from src code using vs 2012. I have tried both
> static and dynamic linkage to no avail.)
>
>
>
> This error originates from  flexdll.c in the *FlexDLL* package. It tries
> to call LoadLibraryEx and is returning null.
>
>
>
> *Further Testing *
>
>
>
> // A test to load dllunix dynamically ….
>
> #include <flexdll.h>
>
> #include <stdio.h>
>
> #include <windows.h>
>
>
>
> int main(int argc, char *argv[]) {
>
>     void *handle;
>
>     printf("Try open: %s\n", argv[1]);
>
>     handle = flexdll_dlopen(argv[1], FLEXDLL_RTLD_GLOBAL);
>
>     printf("Handle: %p\n", handle);
>
>     if (handle == NULL) {
>
>             printf("Error code: %d\n", GetLastError());
>
>             printf("Error message: %s\n", flexdll_dlerror());
>
>     }
>
>     return 0;
>
> }
>
>
>
> *cl -nologo -MD -I"D:\external\OCaml\FlexDLL_034" -c Testdll.c*
>
> *flexlink -v -merge-manifest -exe -o testdll Testdll.obj*
>
>
>
> *Direct test of dllunix.dll*
>
>
>
> *$./testdll dllunix.dll*
>
>
>
> *Try open:dllunix.dll*
>
> *Error code: 998*
>
> *Error message: Invalid access to memory location.*
>
>
>
> Instead of using dllunix.dll I have tried to compile a simple program for
> testing
>
>
>
> *A simplified test*
>
>
>
> #include <stdio.h>
>
> int x = 10;
>
> void dump_x(void) {
>
> printf("myplugin finds the value : \nx=%i\n", x); fflush( stdout );
>
> }
>
>
>
> *cl -nologo -MD  -I.. -c myplug.c*
>
> *flexlink.exe -chain msvc -merge-manifest  -v -o myplug.dll  myplug.obj
> -link ws2_32.lib*
>
>
>
> *$./testdll  myplug.dll*
>
>
>
> *Try open: myplug.dll*
>
> *Error code: 998*
>
> *Error message: Invalid access to memory location.*
>
>
>
> Note that   the dump exe in flexdll fails in the same manner
>
>
>
> *In vs2008 build this is ok *
>
>
>
>
>
> *$./testdll  myplug.dll*
>
>
>
> Try open: myplug.dll
>
> Handle: 01F6DB78
>
>
>
> Even running the test/dump.exe from flexDLL is ok
>
>
>
> *$ ./dump myplug.dll *
>
>
>
> INIT
>
> Dynamic symbol at 00412000 (size = 12)
>
> [0]  00402227: __iob_func
>
> [1]  00401BA0: api
>
> [2]  00402E7C: fflush
>
> [3]  004017F0: flexdll_dlclose
>
> [4]  004018B0: flexdll_dlerror
>
> [5]  00401580: flexdll_dlopen
>
> [6]  00401860: flexdll_dlsym
>
> [7]  00401900: flexdll_dump_exports
>
> [8]  00401A60: flexdll_dump_relocations
>
> [9]  00401000: flexdll_relocate
>
> [10]  00401BC0: main
>
> [11]  00401D0E: printf
>
> OK
>
> ** Loading myplug.dll
>
> ** handle = 01FEDB78
>
> Dynamic symbol at 004C0000 (size = 4)
>
> [0]  004B1000: FlexDLLiniter@12
>
> [1]  004B1170: dump_x
>
> [2]  004B11A0: torun
>
> [3]  004BC014: x
>
> myplugin finds the value :
>
> x=10
>
>
>
>
>
>
>
>
>
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