I'm not able to build llvm.
The most relevant error message I can see is
{standard input}: Assembler messages:{standard input}:29493: Warning: end of file not at end of a line; newline inserted
{standard input}:30648: Error: invalid operands (UND and .gcc_except_table._ZNK4llvm14TargetLowering11LowerCallToERNS0_16CallLoweringInfoE sections)
for `-'
x86_64-pc-linux-gnu-g++: internal compiler error: Killed (program cc1plus)