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cmake: disable warning on C++ 20

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Compound assigments like x |= y to volatile qualified values are
deprecated in C++20.  This idiom is common in CMSIS headers for
manipulating peripheral registers.  Since these headers are core they
are likely to be included indirectly in C++ modules; since they are in
vendor-provided headers we can't "fix" them.

Disable the warning when building for C++.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2020-12-18 07:52:33 -06:00 • committed by Kumar Gala
commit c7ad0b574a
1 changed files with 2 additions and 1 deletions
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3
cmake/compiler/gcc/compiler_flags.cmake
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@ -124,7 +124,8 @@ set_property(TARGET compiler-cpp PROPERTY dialect_cpp98 "-std=c++98")
set_property(TARGET compiler-cpp PROPERTY dialect_cpp11 "-std=c++11" "-Wno-register")
set_property(TARGET compiler-cpp PROPERTY dialect_cpp14 "-std=c++14" "-Wno-register")
set_property(TARGET compiler-cpp PROPERTY dialect_cpp17 "-std=c++17" "-Wno-register")
set_property(TARGET compiler-cpp PROPERTY dialect_cpp2a "-std=c++2a" "-Wno-register")
set_property(TARGET compiler-cpp PROPERTY dialect_cpp2a "-std=c++2a"
"-Wno-register" "-Wno-volatile")
# Disable exeptions flag in C++
set_property(TARGET compiler-cpp PROPERTY no_exceptions "-fno-exceptions")