Created attachment 436716 [details] Proposed fix I am sure there are plenty of other build issues on this platform, but most immediately a logic error exists on line 87 of WTF/wtf/PlatformCPU.h. It checks CPU(BIG_ENDIAN) but WTF_CPU_BIG_ENDIAN is not defined until later in the file. Proposed fix (following the PPC64 example) is attached.
<rdar://problem/82758931>