Compiler errors with mingw64

[Tom Reahard]

When compiling using msys2,  I receive the following error.

libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I.. -I. -I../include -Iinclude
-I../src -I. -I../include -Iinclude -I../src -MT src/x86/unix64.lo -MD -MP
-MF src/x86/.deps/unix64.Tpo -c ../src/x86/unix64.S  -DDLL_EXPORT -DPIC -o
src/x86/.libs/unix64.o
../src/x86/unix64.S: Assembler messages:
../src/x86/unix64.S:417: Error: junk at end of line, first unrecognized
character is `,'

Any thoughts on why this occurs?  Searches show others have had the same
problem but no solutions are provided.