f953e7317a
Silence the "DWARF2 can only represent one section per compilation unit" warning in amd64 GENERIC builds by disabling Clang's debuginfo generation for this assembler file (-g0). The message is replaced by a warning from ctfconvert that there is no debuginfo to convert (future work). The file contains some metadata (several ELF notes) and some code. The code does not appear to have anything that debuginfo would aid. I looked at the generated debuginfo (readelf -w xen-locore.o) prior to this change, and the metadata that would be disabled are things like associated between binary offset and code line number (not especially useful with a disassembler), and label metadata for the entry points (not especially useful as this is already in the symbol table). Reviewed by: royger Differential Revision: https://reviews.freebsd.org/D24384
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