Peter Klausler 0d9b0f642b [flang] IEEE_ARITHMETIC must imply USE IEEE_EXCEPTIONS
The intrinsic module IEEE_ARITHMETIC must incorporate the public
names from the intrisic module IEEE_EXCEPTIONS.  Rename IEEE_EXCEPTIONS
to __Fortran_ieee_exceptions so that it won't clash with the
nonintrinsic namespace, establish a new intrinic IEEE_EXCEPTIONS
module that USEs it, and add a USE to IEEE_ARITHMETIC.

Updated to use STREQUAL rather than ambiguous MATCHES in
the CMakeLists.txt file.

Differential Revision: https://reviews.llvm.org/D121490
2022-03-14 15:13:43 -07:00
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