Work around clang-cl issue with MSVC's safeint.h for now

At least some C:\Program Files (x86)\Windows Kits\10\Include\10.0.10240.0\ucrt\
safeint_internal.h, in the specialization of LargeIntRegMultiply::RegMultiply
for signed __int64, contains an (unnecessary) C-style cast from l-value unsigned
__int64 tmp

RegMultiply( ..., ..., (unsigned _int64)tmp ) == SafeIntNoError )

which clang-cl correctly identifies as producing a prvalue (so cannot bind to
the third 'unsigned __int64& ret' parameter of that RegMultiply call), while
MSVC apparently has a non-standard mis-feature of treating such a "self-cast" as
an lvalue.

Until clang-cl learns about that mis-feature too, use the fallback
implementation of o3tl/safeint.hxx when compiling with clang-cl.

Change-Id: I7a454134589d958ad7ba845c37584b3aa7b94926
Reviewed-on: https://gerrit.libreoffice.org/36066
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions