Details
Description
The attempt to build MongoDB 4.2.3 on macOS 10.14 (High Sierra) fails:
:info:build src/mongo/platform/overflow_arithmetic.h:97:16: error: constexpr function never produces a constant expression [-Winvalid-constexpr]
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:info:build constexpr bool mongoSignedMultiplyOverflow64(long lhs, long rhs, long* product) {
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:info:build ^
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:info:build src/mongo/platform/overflow_arithmetic.h:98:12: note: subexpression not valid in a constant expression
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:info:build return __builtin_mul_overflow(lhs, rhs, product);
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:info:build ^
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Please also see attached build log and MacPorts ticket 60032