This utility can be used for converting object files between COFF/PE,
OMF, ELF and Mach-O formats for all 32-bit and 64-bit x86 platforms.
Can modify symbol names in object files.  Can build, modify and convert
function libraries across platforms.  Can dump object files and
executable files.  Also includes a very good disassembler supporting the
SSE4, AVX, AVX2, AVX512, FMA3, FMA4, XOP and Knights Corner instruction
sets.

WWW: https://www.agner.org/optimize