fixed a bug in building Windows Visual Studio 2019?

[TangLaoya]

Dear all,

When I am trying to build the powerful Exasim in Windows, there are some compiling errors when building Kokkos:
Kokkos_Core.cpp
K:\GitHub\Exasim\Exasim\kokkos\core\src\impl/KokkosExp_Host_IterateTile.hpp(1473): warning C4819: 该文件包含不能在当前代码页(936)中表示的字符。请将该文件保存为 Unicode 格式以防止数据丢失
K:\GitHub\Exasim\Exasim\kokkos\core\src\Kokkos_View.hpp(884): error C2535: “Kokkos::View<D,P...>::View(enable_if<0,const std::string&>::type,const Args...)”: 已经定义或声明成员函数
K:\GitHub\Exasim\Exasim\kokkos\core\src\Kokkos_View.hpp(829): note: 参见“Kokkos::View<D,P...>::View”的声明
K:\GitHub\Exasim\Exasim\kokkos\core\src\Kokkos_View.hpp(1103): note: 查看对正在编译的 类 模板 实例化“Kokkos::View<D,P...>”的引用
NMAKE : fatal error U1077: “"C:\Program Files\CMake\bin\cmake.exe"”: 返回代码“0x2”
Stop.
NMAKE : fatal error U1077: “"C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\nmake.exe"”: 返回代码“0x2”
Stop.
NMAKE : fatal error U1077: “"C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\nmake.exe"”: 返回代码“0x2”
Stop.

After modified latest code
Exasim\kokkos\core\src\Kokkos_View.hpp
line 883 from
template <class... Args>
to
template <class = void, class... Args>

the compile successed.

I don't know whether it could lead to some other problems.

Thanks,
Tang Laoya

[TangLaoya]

Another problem:
Since Exasim used OpenMP 3.0 or latter, but in Windows the VS 2019 and Intel MKL only use OpenMP 2.0, when compiling the code, the '/openmp:llvm' is used to enable the OpenMP 3.0, however, when running the program, the following runtime error displayed:

OMP: Error #15: Initializing libomp140.x86_64.dll, but found libiomp5md.dll already initialized.

to solve this problem, I added the following code
_putenv("KMP_DUPLICATE_LIB_OK=TRUE");
in line 150 (immidiately after
int main(int argc, char** argv)
)
of
Exasim\backend\Main\main.cpp

Thanks,
Tang Laoya

[exapde]

Dear Tang Laoya,

Thank you very much building Exasim in Windows, catching some compiling errors, and providing fixes. We will include them in the next release. Your comments will allow us to improve Exasim especially on Windows. You are one of a few people who had tried to install Exasim on Windows. So, your feedback is very important to us.

Best,
Cuong