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{ "-M", "" }
somewhere in documented_lang_options.
The details are below.
Here's the relevant snippet from toplev.c:
/* These are for languages with USE_CPPLIB. */
/* These options are already documented in cpplib.c */
{ "--help", "" },
{ "-A", "" },
{ "-D", "" },
{ "-I", "" },
{ "-U", "" },
{ "-H", "" },
{ "-idirafter", "" },
{ "-imacros", "" },
{ "-include", "" },
{ "-iprefix", "" },
{ "-isystem", "" },
{ "-iwithprefix", "" },
{ "-iwithprefixbefore", "" },
{ "-lang-c", "" },
{ "-lang-c89", "" },
{ "-lang-c++", "" },
{ "-remap", "" },
{ "-nostdinc", "" },
{ "-nostdinc++", "" },
{ "-trigraphs", "" },
{ "-undef", "" },
`cppinit.c' has a much larger list. Some of these are handled by
special cases in main() of toplev.c -- these include -g*, -W*, -d*,
and -f*. However, toplev.c is definitely missing support for the -M*
family of options.
-include <file> Include the contents of <file> before other files
-imacros <file> Accept definition of macros in <file>
-iprefix <path> Specify <path> as a prefix for next two options
-iwithprefix <dir> Add <dir> to the end of the system include path
-iwithprefixbefore <dir> Add <dir> to the end of the main include path
-isystem <dir> Add <dir> to the start of the system include path
-idirafter <dir> Add <dir> to the end of the system include path
-I <dir> Add <dir> to the end of the main include path
-nostdinc Do not search system include directories
(dirs specified with -isystem will still be used)
-nostdinc++ Do not search system include directories for C++
-o <file> Put output into <file>
-pedantic Issue all warnings demanded by strict ANSI C
-traditional Follow K&R pre-processor behaviour
-trigraphs Support ANSI C trigraphs
-lang-c Assume that the input sources are in C
-lang-c89 Assume that the input sources are in C89
-lang-c++ Assume that the input sources are in C++
-lang-objc Assume that the input sources are in ObjectiveC
-lang-objc++ Assume that the input sources are in ObjectiveC++
-lang-asm Assume that the input sources are in assembler
-lang-chill Assume that the input sources are in Chill
-std=<std name> Specify the conformance standard; one of:
gnu89, gnu9x, c89, c9x, iso9899:1990,
iso9899:199409, iso9899:199x
-+ Allow parsing of C++ style features
-w Inhibit warning messages
-Wtrigraphs Warn if trigraphs are encountered
-Wno-trigraphs Do not warn about trigraphs
-Wcomment{s} Warn if one comment starts inside another
-Wno-comment{s} Do not warn about comments
-Wtraditional Warn if a macro argument is/would be turned into
a string if -traditional is specified
-Wno-traditional Do not warn about stringification
-Wundef Warn if an undefined macro is used by #if
-Wno-undef Do not warn about testing undefined macros
-Wimport Warn about the use of the #import directive
-Wno-import Do not warn about the use of #import
-Werror Treat all warnings as errors
-Wno-error Do not treat warnings as errors
-Wall Enable all preprocessor warnings
-M Generate make dependencies
-MM As -M, but ignore system header files
-MD As -M, but put output in a .d file
-MMD As -MD, but ignore system header files
-MG Treat missing header file as generated files
-g Include #define and #undef directives in the output
-D<macro> Define a <macro> with string '1' as its value
-D<macro>=<val> Define a <macro> with <val> as its value
-A<question> (<answer>) Assert the <answer> to <question>
-U<macro> Undefine <macro>
-u or -undef Do not predefine any macros
-v Display the version number
-H Print the name of header files as they are used
-C Do not discard comments
-dM Display a list of macro definitions active at end
-dD Preserve macro definitions in output
-dN As -dD except that only the names are preserved
-dI Include #include directives in the output
-ifoutput Describe skipped code blocks in output
-P Do not generate #line directives
-$ Do not allow '$' in identifiers
-remap Remap file names when including files.
-h or --help Display this information
- Hari
--
Raja R Harinath ------------------------------ harinath@cs.umn.edu
"When all else fails, read the instructions." -- Cahn's Axiom
"Our policy is, when in doubt, do the right thing." -- Roy L Ash