$ gcc --help
Options:
-pass-exit-codes Exit with highest error code from a phase
--help Display this information
(Use '-v --help' to display command line options of sub-processes)
-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-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
-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
-Xlinker <arg> Pass <arg> on to the linker
-save-temps Do not delete intermediate files
-pipe Use pipes rather than intermediate files
-time Time the execution of each subprocess
-specs=<file> Override builtin specs with the contents of <file>
-std=<standard> Assume that the input sources are for <standard>
-B <directory> Add <directory> to the compiler's search paths
-b <machine> Run gcc for target <machine>, if installed
-V <version> Run gcc version number <version>, if installed
-v Display the programs invoked by the compiler
-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>
-x <language> Specify the language of the following input files
Permissable languages include: c c++ assembler none
'none' means revert to the default behaviour of
guessing the language based on the file's extension
Options starting with -g, -f, -m, -O or -W 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.
For bug reporting instructions, please see:
<URL:http://bugzilla.redhat.com/bugzilla/>.