+@cindex @option{-mabi=} command line option, AArch64
+@item -mabi=@var{abi}
+Specify which ABI the source code uses. The recognized arguments
+are: @code{ilp32} and @code{lp64}, which decides the generated object
+file in ELF32 and ELF64 format respectively. The default is @code{lp64}.
+
+@cindex @option{-mcpu=} command line option, AArch64
+@item -mcpu=@var{processor}[+@var{extension}@dots{}]
+This option specifies the target processor. The assembler will issue an error
+message if an attempt is made to assemble an instruction which will not execute
+on the target processor. The following processor names are recognized:
+@code{cortex-a53},
+@code{cortex-a57},
+@code{thunderx},
+@code{xgene1}
+and
+@code{xgene2}.
+The special name @code{all} may be used to allow the assembler to accept
+instructions valid for any supported processor, including all optional
+extensions.
+
+In addition to the basic instruction set, the assembler can be told to
+accept, or restrict, various extension mnemonics that extend the
+processor. @xref{AArch64 Extensions}.
+
+If some implementations of a particular processor can have an
+extension, then then those extensions are automatically enabled.
+Consequently, you will not normally have to specify any additional
+extensions.
+
+@cindex @option{-march=} command line option, AArch64
+@item -march=@var{architecture}[+@var{extension}@dots{}]
+This option specifies the target architecture. The assembler will
+issue an error message if an attempt is made to assemble an
+instruction which will not execute on the target architecture. The
+only value for @var{architecture} is @code{armv8-a}.
+
+If both @option{-mcpu} and @option{-march} are specified, the
+assembler will use the setting for @option{-mcpu}. If neither are
+specified, the assembler will default to @option{-mcpu=all}.
+
+The architecture option can be extended with the same instruction set
+extension options as the @option{-mcpu} option. Unlike
+@option{-mcpu}, extensions are not always enabled by default,
+@xref{AArch64 Extensions}.
+
+@cindex @code{-mverbose-error} command line option, AArch64
+@item -mverbose-error
+This option enables verbose error messages for AArch64 gas. This option
+is enabled by default.
+
+@cindex @code{-mno-verbose-error} command line option, AArch64
+@item -mno-verbose-error
+This option disables verbose error messages in AArch64 gas.
+