.TH AS 1 "August 23, 2023" "Apple Inc." .SH NAME as \- assembler .SH SYNOPSIS .B as [ .I "option \&..." ] [ .I "file \&..." ] .SH DESCRIPTION The .I as command is deprecated. It is now calls clang to use clang's "intergated assembler". .PP Clang will automatically run its assembler on files with a .s extension. So you can replace: "as -arch arm64 foo.s -o foo.o" with "clang -arch arm64 foo.s -o foo.o" .SH "SEE ALSO" cc(1), ld(1), nm(1), otool(1), arch(3), Mach-O(5)