From 0b55d29b6acc7a0418d02159ff50c3ffc16fc8de Mon Sep 17 00:00:00 2001 From: tiv Date: Fri, 26 Jun 2020 10:32:43 +0300 Subject: [PATCH] 0031628: Configuration - Visual Studio 2019 compiler hangs on building 32-bit target The workaround for a bug occurred in MS Visual Studio 2019 / Win32 / Release configuration with disabled Whole Program Optimization is implemented. The problem was at the line "std::stable_sort(aPairList.begin(), aPairList.end(), BRepExtrema_CheckPair_Comparator);" of BRepExtrema_DistShapeShape.cxx source file, and linked to NCollection_Vector::Differ() method. This workaround was suggested by MSFT team. --- src/NCollection/NCollection_Vector.hxx | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/NCollection/NCollection_Vector.hxx b/src/NCollection/NCollection_Vector.hxx index ef763f9d74..6ef85c74ac 100755 --- a/src/NCollection/NCollection_Vector.hxx +++ b/src/NCollection/NCollection_Vector.hxx @@ -91,6 +91,15 @@ public: offsetV (static_cast(theOffset)); } + // Workaround for a bug (endless compilation) occurred in MS Visual Studio 2019 / Win32 / Release configuration + // with DISABLED Whole Program Optimization (as it is by default in OCCT). The problem is + // at the line std::stable_sort(aPairList.begin(), aPairList.end(), BRepExtrema_CheckPair_Comparator); + // of BRepExtrema_DistShapeShape.cxx source file. + // To enable Whole Program Optimization use command line keys: /GL for compiler and /LTCG for linker. + // Remove this workaround after the bug in VS2019 will be fixed (see OCCT bug #0031628). +#if defined (_MSC_VER) && (_MSC_VER >= 1920) && !defined (_WIN64) && !defined (_DEBUG) + __declspec(noinline) __declspec(deprecated("TODO remove this workaround for VS2019 compiler hanging bug")) +#endif //! Difference operator. ptrdiff_t Differ (const Iterator& theOther) const {