[Mingw-cross-env-list] Mingw-w64, libstdc++, libwinpthread and libgcc missing dlls

[Richard Crozier]

Dear List,

First of all thanks for your work on MXE, secondly, I'm not a 
subscriber, so please CC me on any replies.

I have a cmake based project which I am cross-compiling on 64 bit Linux 
for 64 bit windows using Mingw-w64 via MXE. The project creates static 
libraries, and also some executebles which are this wrappers for the 
static libraries.

When I attempt to load the static libraries I have problems due to 
missing dlls (e.g. libstdc++, libwinpthread and libgcc). These dlls seem 
to be shipped with Mingw-w64, and can be found if Mingw-w64 is installed 
on the User's system, but I would like to avoid Users having to do this. 
What is the best/standard way to get around this? I'm using the standard 
cmake toolchain file (attached) provided by MXE (which looks like it's 
supposed to be statically linking everything anyway).

I have tried the following cmake command to try and have the libraries 
linked statically, but it didn't seem to have any effect on the 
resulting binary sizes:

cmake -DCMAKE_BUILD_TYPE=Release \
      -DCMAKE_CXX_FLAGS="${CMAKE_CXX_FLAGS} \
      "-static -static-libgcc -static-libstdc++"" \

-DCMAKE_TOOLCHAIN_FILE=/opt/mxe/usr/x86_64-w64-mingw32/share/cmake/mxe-conf.cmake 
$WORKING_COPY_DIR/release/xfemm_mingw_win64/cfemm

Alternatively, can I have MXE build these libraries and copy them to the 
distribution? If so, how?

In case you are interested, the project (xfemm) is freely available on 
Sourceforge here:

https://sourceforge.net/projects/xfemm/

You can add it to your list of projects if you like.

Thanks,
Richard

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