On Fri, 2005-10-07 at 11:02, Alexandre Julliard wrote:
> You shouldn't need to export them, you can still link to the library
> directly at the Unix level, a Winelib dll is still an ELF library.
You are right, and using winegcc helped alot. I can link, but ... then
the program crashes when it runs. I attached a bash script that
demonstrates the problem. It builds two winelib apps: "good" and "bad".
"bad" has the problem and won't run. "good" doesn't, and will.
It seems that winebuild --exe is not working correctly when linking if
there are no winelib DLLs with exports.... or perhaps it's still user
error %) ?
The winebuild step triggered by wineg++ is not generating
__wine_spec_init or __wine_dll_register entry points. These entry points
*are* made if there are exports in the shared library's spec file. The
entry points should be pulled in with libwinecrt0.a, since they are
defined there. But they are not and I can't figure out why.
The .exe.so file is created without complaints, but when you try to run
it it seg faults. The crash is related to the absent __wine_spec_init
entry point. I found where (in kernel/process.c) and will submit a patch
to make wine quit gracefully in such a case, by the way.
The 'nm' output of the two looks very similar except bad.exe.so:
* has no __wine_spec_init
* has no __wine_dll_register
* has undefined __wine_spec_init_ctor
* has undefined __wine_spec_init_state
I'm so close! Hopefully it's just some little missing param or
something. I am guessing that making Wine calls in a shared library
without exports is not common, but that's how our code works. I am
hoping that it's your intention that it work... or else I gotta spec out
hundreds and hundreds of mangled C++ function names!
- mo
set -x
cat << EOF > shared.cpp
#include <windows.h>
#include <unistd.h>
void show_window()
{
char bufr[128];
gethostname(bufr, sizeof(bufr));
strcat(bufr, " says, 'Howdy World!'");
::MessageBox(NULL, bufr, "App", MB_OK);
}
EOF
wineg++ -c shared.cpp -o shared.o
cat << EOF > app.cpp
#include <stdio.h>
extern void show_window();
int main(int argc, char* argv[])
{
show_window();
return(0);
}
EOF
wineg++ -c app.cpp -o app.o
echo > shared.spec
wineg++ -shared shared.spec shared.o -o libshared.dll.so
wineg++ -o bad.exe.so app.o -L`pwd` -lshared.dll
wineg++ -o bad bad.exe.so
echo '@ stdcall _Z11show_windowv()' > shared.spec
wineg++ -shared shared.spec shared.o -o shared.dll.so
winebuild -w --def -o libshared.def --export shared.spec
wineg++ app.o -o good.exe.so -L`pwd` -lshared
wineg++ -o good good.exe.so
set +x
echo CRASHES: LD_LIBRARY_PATH=`pwd` ./bad
echo WORKS: ./good
