cmCxxModuleMapper: add a query for the open mode for the modmap
GCC (MinGW) wants to use \n
on Windows too.
Fixes: #25974 (closed)
Backport: release
Manual-backport: release-3.28
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GCC (MinGW) wants to use \n
on Windows too.
Fixes: #25974 (closed)
Backport: release
Manual-backport: release-3.28