Dll compilation issue

[vonc]

Hi,

I compile with g++ (cygwin gcc-3.3.3-3 WindowsXPSP1) a simple dll, with a source similar to this thread: layer's first dll

However, when I try to DllCall it or to DllLoad it, Autoit just freeze (I must CTRL+Break it). It never returns. (with autoit 3.1.1 latest beta 37, 38...)

If I make a test C program, which try to "LoadLibrary", it works...

The shared dll produced does contain a DllMain.

I tried various compilation options. (see below for an example of a compilation log)

Have you any clue about the correct option to produce a dll loadable with AutoIt ?

Or is gcc cygwin a non-compatible option to produce Autoit loadable dll ?

Thanks in advance.

VonC

------- COMPILATION LOG SAMPLE -----------

**** Incremental build of configuration Custom for project Sample ****

make -k all

Building file: ../Sample.cpp

g++ -O0 -Wall -c -fmessage-length=0 -v -oSample.o ../Sample.cpp

Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/specs

Configured with: /gcc/gcc-3.3.3-3/configure --verbose --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-languages=c,ada,c++,d,f77,java,objc,pascal --enable-nls --without-included-gettext --enable-libgcj --with-system-zlib --enable-interpreter --enable-threads=posix --enable-java-gc=boehm --enable-sjlj-exceptions --disable-version-specific-runtime-libs --disable-win32-registry

Thread model: posix

gcc version 3.3.3 (cygwin special)

/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/cc1plus.exe -quiet -v -D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=3 -D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix -idirafter /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/../../../../include/w32api -idirafter /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/../../../../i686-pc-cygwin/lib/../../include/w32api ../Sample.cpp -D__GNUG__=3 -quiet -dumpbase Sample.cpp -auxbase-strip Sample.o -O0 -Wall -version -fmessage-length=0 -o /cygdrive/c/temp/ccNcEYz6.s

GNU C++ version 3.3.3 (cygwin special) (i686-pc-cygwin)

compiled by GNU C version 3.3.3 (cygwin special).

GGC heuristics: --param ggc-min-expand=56 --param ggc-min-heapsize=49086

ignoring nonexistent directory "/usr/local/include"

ignoring nonexistent directory "/usr/i686-pc-cygwin/include"

ignoring duplicate directory "/usr/i686-pc-cygwin/lib/../../include/w32api"

#include "..." search starts here:

#include <...> search starts here:

/usr/include/c++/3.3.3

/usr/include/c++/3.3.3/i686-pc-cygwin

/usr/include/c++/3.3.3/backward

/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/include

/usr/include

/usr/include/w32api

End of search list.

/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/../../../../i686-pc-cygwin/bin/as.exe --traditional-format -oSample.o /cygdrive/c/temp/ccNcEYz6.s

Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/specs

Configured with: /gcc/gcc-3.3.3-3/configure --verbose --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-languages=c,ada,c++,d,f77,java,objc,pascal --enable-nls --without-included-gettext --enable-libgcj --with-system-zlib --enable-interpreter --enable-threads=posix --enable-java-gc=boehm --enable-sjlj-exceptions --disable-version-specific-runtime-libs --disable-win32-registry

Thread model: posix

gcc version 3.3.3 (cygwin special)

/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/cc1plus.exe -E -D__GNUG__=3 -quiet -v -P -MM -MG -D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=3 -D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix -idirafter /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/../../../../include/w32api -idirafter /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/../../../../i686-pc-cygwin/lib/../../include/w32api ../Sample.cpp -Wall -w -fmessage-length=0 -O0

ignoring nonexistent directory "/usr/local/include"

ignoring nonexistent directory "/usr/i686-pc-cygwin/include"

ignoring duplicate directory "/usr/i686-pc-cygwin/lib/../../include/w32api"

#include "..." search starts here:

#include <...> search starts here:

/usr/include/c++/3.3.3

/usr/include/c++/3.3.3/i686-pc-cygwin

/usr/include/c++/3.3.3/backward

/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/include

/usr/include

/usr/include/w32api

End of search list.

Finished building: ../Sample.cpp

Building target: Sample.dll

g++ -shared -o Sample.dll Sample.o

Finished building: Sample.dll

Build complete for project Sample

[vonc]

Up, Up

To sumarize my problem exposed in the previous post:

Do you have an example of a gcc commande-line able to compile a C source file into a Dll ?

(a Dll that you can then 'DllCall' or 'DllOpen' in an Autoit script)

Again, My gcc command-line does produce a Dll, but the Autoit script freezes when it 'DllCall' or 'DllOpen' it

[vonc]

Up again,

Ok, let me rephrase the question:

Anyone with a valid gcc command-line to produce a dll that can be called within an Autoit script ?

Rq: the only compiler I have access to is a gcc one, the gcc with cygwin...

Thanks in advance.

[SumTingWong]

Up again, 

Ok, let me rephrase the question:

Rq: the only compiler I have access to is a gcc one, the gcc with cygwin...

Thanks in advance.

<{POST_SNAPBACK}>

Why don't you upload your dll and the script you are using to access this dll and people might be a bit more responsive.

[Ejoc]

I use this to compile a DLL:

gcc -c MyDll.c
gcc -shared -o MyDll.dll MyDll.o -Wl,--out-implib,libmessage.a

MyDll.c:

#define EXPORT __declspec(dllexport)
EXPORT int ReturnInt(int src)
{
    return src;
}

AutoIt:

$ret = DllCall("MyDll.dll","int","ReturnInt","int",5)
MsgBox(0,"Should be 5",$ret[0])

[vonc]

I use this to compile a DLL:

gcc -c MyDll.c
gcc -shared -o MyDll.dll MyDll.o -Wl,--out-implib,libmessage.a

Hi Ejoc,

And thanks for this answer.

I tried exactly your Dll.c and the two gcc line, creating a MyDll.dll (and a libmessage.a ?)

The result of a DllCall (or DllOpen) remains the same: freeze...

I suppose my cygwin gcc is somehow incorrect...

C:\>which gcc

/usr/bin/gcc

C:\>gcc --version

gcc (GCC) 3.3.3 (cygwin special)

[Ejoc]

Can you at least show the AutoIt lines you are using to call the functions or are you using all 3 examples I posted? Otherwise I guess it's your compiler, I use either MingGW by it's self or I use Dev-C++ when I work on AutoIt source.

[vonc]

Can you at least show the AutoIt lines you are using to call the functions or are you using all 3 examples I posted?  Otherwise I guess it's your compiler, I use either MingGW by it's self or I use Dev-C++ when I work on AutoIt source.

<{POST_SNAPBACK}>

Well... the Autoit line is precisely the one you use in your example.

$ret = DllCall("MyDll.dll","int","ReturnInt","int",5)

MsgBox(0,"Should be 5",$ret[0])

The MsgBox never displays, because the Autoit script freezes in the DllCall Step.

I will try with a standalone installation of MingGW instead of a gcc included in a cygwin distribution

Anyway, thank you for your inputs and advices