gcc --help

gcc --help

Usage: gcc [options] file...

Options:

  -pass-exit-codes         Exit with highest error code from a phase

  --help                   Display this information

  --target-help            Display target specific command line options

  --help={common|optimizers|params|target|warnings|[^]{joined|separate|undocumented}}[,...]

                           Display specific types of command line options

  (Use '-v --help' to display command line options of sub-processes)

  --version                Display compiler version information

  -dumpspecs               Display all of the built in spec strings

  -dumpversion             Display the version of the compiler

  -dumpmachine             Display the compiler's target processor

  -print-search-dirs       Display the directories in the compiler's search path

  -print-libgcc-file-name  Display the name of the compiler's companion library

  -print-file-name=<lib>   Display the full path to library <lib>

  -print-prog-name=<prog>  Display the full path to compiler component <prog>

  -print-multiarch         Display the target's normalized GNU triplet, used as

                           a component in the library path

  -print-multi-directory   Display the root directory for versions of libgcc

  -print-multi-lib         Display the mapping between command line options and

                           multiple library search directories

  -print-multi-os-directory Display the relative path to OS libraries

  -print-sysroot           Display the target libraries directory

  -print-sysroot-headers-suffix Display the sysroot suffix used to find headers

  -Wa,<options>            Pass comma-separated <options> on to the assembler

  -Wp,<options>            Pass comma-separated <options> on to the preprocessor

  -Wl,<options>            Pass comma-separated <options> on to the linker

  -Xassembler <arg>        Pass <arg> on to the assembler

  -Xpreprocessor <arg>     Pass <arg> on to the preprocessor

  -Xlinker <arg>           Pass <arg> on to the linker

  -save-temps              Do not delete intermediate files

  -save-temps=<arg>        Do not delete intermediate files

  -no-canonical-prefixes   Do not canonicalize paths when building relative

                           prefixes to other gcc components

  -pipe                    Use pipes rather than intermediate files

  -time                    Time the execution of each subprocess

  -specs=<file>            Override built-in specs with the contents of <file>

  -std=<standard>          Assume that the input sources are for <standard>

  --sysroot=<directory>    Use <directory> as the root directory for headers

                           and libraries

  -B <directory>           Add <directory> to the compiler's search paths

  -v                       Display the programs invoked by the compiler

  -###                     Like -v but options quoted and commands not executed

  -E                       Preprocess only; do not compile, assemble or link

  -S                       Compile only; do not assemble or link

  -c                       Compile and assemble, but do not link

  -o <file>                Place the output into <file>

  -pie                     Create a position independent executable

  -shared                  Create a shared library

  -x <language>            Specify the language of the following input files

                           Permissible languages include: c c++ assembler none

                           'none' means revert to the default behavior of

                           guessing the language based on the file's extension

Options starting with -g, -f, -m, -O, -W, or --param are automatically

 passed on to the various sub-processes invoked by gcc.  In order to pass

 other options on to these processes the -W<letter> options must be used.