Windows application fails to compile when including boost/process/v2.hpp

[keince]

I'm upgrading my application from using

#include <boost/process.hpp>

to using the new boost process v2 stuff by using

#include <boost/process/v2.hpp>

When I do this, I get the following compile errors in Visual Studio 2022...

boost\process\v2\detail\utf8.hpp(28,47): error C2491: 'boost::process::v2::detail::conv_string': definition of dllimport function not allowed
boost\asio\detail\socket_types.hpp(24,1): fatal error C1189: #error: WinSock.h has already been included

Any ideas why I'm getting these errors? I've tried different things from previous issues posted but no success so far.

I'm using VS 2022 64-bit running on Windows 11. I'm also using boost::process version 1.86 built with vcpkg

[keince]

Just a follow-up to my previous comment...

It appears that there are issues with version 1.86 and using v2 on Windows based on this thread of discussion...

conan-io/conan-center-index#25388

While there appears to be a hotfix for the problem, the boost::process built in vcpkg (which is what I'm using) doesn't have it in there.

Unless something can be done to mitigate this problem, I will revert back to using the soon-to-be deprecated boost::process v1...

[klemens-morgenstern]

The first was a bug, that's now fixed (for the upcoming 1.87 release). The 1.87 beta is already out and I think the release will be on December 4th. I don't know when either will land in vcpkg.

As a temporary workaround, you could just grab the fixed header (https://github.com/boostorg/process/blob/develop/include/boost/process/v2/detail/utf8.hpp) and include it before process/v2.hpp under a different name. The include guard should then take care of things for you;.

I'll probably deprecate v1 in the release after that (March).

The second issue seems to have some inclusion order issues caused by some odd inclusion order. Try including boost/asio.hpp before anything else. For a less blunt solution I'd need to know what you include beforehand (most like the windows.h or WinSock.h is included from somewhere other than asio).