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jsoncpp: force explicit casts for integer to floating point conversions

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Bhargava Shastry 2019-08-15 15:41:40 +02:00
parent 2fb442366f
commit ffbf7e6c7a
1 changed files with 8 additions and 1 deletions
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9
cmake/jsoncpp.cmake
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@ -19,7 +19,14 @@ if(EMSCRIPTEN)
# at the moment.
set(JSONCPP_CXX_FLAGS -std=c++17)
else()
set(JSONCPP_CXX_FLAGS ${CMAKE_CXX_FLAGS})
# jsoncpp uses implicit casts for comparing integer and
# floating point numbers. This causes clang-10 (used by ossfuzz builder)
# to error on the implicit conversions. Here, we request jsoncpp
# to unconditionally use static casts for these conversions by defining the
# JSON_USE_INT64_DOUBLE_CONVERSION preprocessor macro. Doing so,
# not only gets rid of the implicit conversion error that clang-10 produces
# but also forces safer behavior in general.
set(JSONCPP_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DJSON_USE_INT64_DOUBLE_CONVERSION")
endif()
set(byproducts "")