Gentoo's Bugzilla –
Attachment 576150 Details for
Bug 685706>=dev-lang/spidermonkey-60.5.2_p0-r2 USE=-jit - In file included from .../work/mozjs-60.5.2/js/src/vm/Interpreter.cpp:26: .../work/mozjs-60.5.2/js/src/jit/arm/Architecture-arm.h:37:22: error: redefinition of 'const int32_t js::jit::NUNBOX32_TYPE_OFFSET'