Nobody???
Dňa pondelok, 2. mája 2016 11:30:11 UTC+2 Ján Adamčák napísal(-a): > > Hello, > > Trying to create an executable from Julia source, there are questions that > raised... The process of exporting functions wasn't successful, function(s) > was not exported to dll, and even the generated dll cant be loaded in c++ > code. Below is the process explained in details: > > Can anybody bring more insight, how to build a standalone executable from > Julia source? > > > Following resources were used for experiments below: > > http://juliacomputing.com/blog/2016/02/09/static-julia.html > > http://juliacomputing.com/blog/2016/03/10/j2c-announcement.html > > > Assume userimg.jl, which contains exported function(s): > # user functionality for DLL > @Base.ccallable foo(x::Int) = x+1 > > > Now, create a dll: > julia.exe "build_sysimg.jl" "./Julia/Compile/bin/" native "julia_dll.jl" > --force > > > > File build_sysimg.jl on line 77 contains following command flags: > run(`$julia -C $cpu_target --output-ji $sysimg_path.ji > --output-o > $sysimg_path.o --sysimage ../../../lib/julia/sys.dll -J > $inference_path.ji > --startup-file=no sysimg.jl --compile=all --eval nothing`) > > The resulting dll has 29MB. > > > The next step is to use the dll in c++ project: > #include <iostream> > #include <windows.h> > > typedef int(*fnc_foo) (int); > > int main() > { > HINSTANCE hDLL = LoadLibraryA("test_dll.dll"); > auto a = GetLastError(); > if (hDLL == nullptr) > throw std::exception("test_dll.dll not found!"); > > fnc_foo foo = (fnc_foo)GetProcAddress(hDLL, "foo"); > if(!foo) > throw std::exception("foo in test_dll.dll not found!"); > > std::cout << foo(10) << "\n"; > > FreeLibrary(hDLL); > > return 0; > } > > In the c++ code above the dll cannot be loaded, hDLL = nullptr, and the > first exception is thrown. > > Expecting the dll with Dependency Walker even an exported function foo() > cannot be found. > > Thanks for any suggestions. > Jan >
