I need to view the assembly code produced for certain C functions.
What flags should I use when compiling the C code using the g++
compiler?
You may add the -S
tag to see the assembly code.
Like for a file TEST.c
, with gcc
, do,
gcc TEST.c -S
clang
also outputs the assembly code with a similar -S
tag.
After that just look for a file with a .S
extension.
You can use the command objdump in a binary you have to see the assembler code, in linux
With gcc
or g++
compiler, you can use the -S
flag to see the assembly code generated.
GNU C Compiler Documentation
-S
: Stop after the stage of compilation proper; do not assemble. The output is in the form of an assembler code file for each non-assembler input file specified.By default, the assembler file name for a source file is made by replacing the suffix
.c
,.i
, etc., with.s
.Input files that don't require compilation are ignored.
Then you have to look for the identifier of your function in the file (if the compiler has not inlined it).
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