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Compiler Reference Guide

Preface armclang Command-line Options Support level definitions Summary of armclang command-line options -C -c -D -E -e -fbare-metal-pie -fbracket-depth=N -fcommon, -fno-common -fdata-sections, -fno-data-sections -ffast-math, -fno-fast-math -ffixed-rN -ffp-mode -ffunction-sections, -fno-function-sections -fident, -fno-ident @file -fldm-stm, -fno-ldm-stm -fno-builtin -fno-inline-functions -flto, -fno-lto -fexceptions, -fno-exceptions -fomit-frame-pointer, -fno-omit-frame-pointer -fropi, -fno-ropi -fropi-lowering, -fno-ropi-lowering -frwpi, -fno-rwpi -frwpi-lowering, -fno-rwpi-lowering -fshort-enums, -fno-short-enums -fshort-wchar, -fno-short-wchar -fstack-protector, -fstack-protector-all, -fstack- -fstrict-aliasing, -fno-strict-aliasing -ftrapv -fvectorize, -fno-vectorize -fvisibility -fwrapv -g, -gdwarf-2, -gdwarf-3, -gdwarf-4 -I -include -L -l -M, -MM -MD, -MMD -MF -MG -MP -MT -march -marm -masm -mbig-endian -mbranch-protection -mcmse -mcpu -mexecute-only -mfloat-abi -mfpu -mimplicit-it -mlittle-endian -mmemtag-stack, -mno-memtag-stack -mno-neg-immediates -moutline, -mno-outline -mpixolib -munaligned-access, -mno-unaligned-access -mthumb -nostdlib -nostdlibinc -o -O -pedantic -pedantic-errors -Rpass -S -save-temps -std --target -U -u -v --version --version_number --vsn -W -Wl -Xlinker -x -### Compiler-specific Keywords and Operators Compiler-specific Function, Variable, and Type Att Compiler-specific Intrinsics Compiler-specific Pragmas Other Compiler-specific Features Standard C Implementation Definition Standard C++ Implementation Definition armclang Integrated Assembler armclang Inline Assembler

-S

1.72 -S

Outputs the disassembly of the machine code that the compiler generates.

Object modules are not generated. The name of the assembly output file defaults to filename.s in the current directory. filename is the name of the source file with any leading directory names removed. The default filename can be overridden with the -o option.

Note:

It is not possible to output meaningful disassembly when the -flto option is enabled because this option generates files containing bitcode. The -flto option is enabled by default at -Omax.
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