Hi Regina, On Tue, May 19, 2026 at 12:03 PM Regina Henschel <[email protected]> wrote: > > any idea what might be the reason for the error: > Could not figure out what C++ library this is
Blind guess scine not possible to tell without config.log / the actual configure test: There was a user on IRC having the same issue and there the problem was the UCRT directory - it misses a slash and thus the include path is wrong/is missing the directory delimiter and it fails to locate the headers. Unfortunately there was no follow-up on the issue, so not sure why it fails - my assumption is that configure couldn't get the path from the registry and hit the fallback path parsing it from the Visual Studio devenv scripts. If it worked on the same system before and breaks now, then it is likely due to https://gerrit.libreoffice.org/c/core/+/204767 that touched the specific paths. / that would be where the trailing slash needs to be accounted for. So check config.log whether it looks something like -IC:/PROGRA~2/WI3CF2~1/10Include/10.0.22621.0/ucrt (note the missing slash between 10 and Include), then it is the same problem as the user was having on IRC. ciao Christian
