diff options
Diffstat (limited to 'gcc/cpplib.c')
| -rw-r--r-- | gcc/cpplib.c | 86 |
1 files changed, 83 insertions, 3 deletions
diff --git a/gcc/cpplib.c b/gcc/cpplib.c index 095d559b..c988097 100644 --- a/gcc/cpplib.c +++ b/gcc/cpplib.c @@ -251,7 +251,8 @@ static char *savestring PROTO ((char *)); static void conditional_skip PROTO ((cpp_reader *, int, enum node_type, U_CHAR *)); static void skip_if_group PROTO ((cpp_reader *, int)); -static int parse_name PARAMS ((cpp_reader *, int)); +static int parse_name PARAMS ((cpp_reader *, int)); +static void print_help PROTO ((void)); /* Last arg to output_line_command. */ enum file_change_code {same_file, enter_file, leave_file}; @@ -6235,6 +6236,79 @@ push_pending (pfile, cmd, arg) CPP_OPTIONS (pfile)->pending = pend; } + +static void +print_help () +{ + printf ("Usage: %s [switches] input output\n", progname); + printf ("Switches:\n"); + /* start-sanitize-obscured-headers */ + printf (" -fgenobscured=<args> Generate obscured versions of header files used\n"); + printf (" -fuseobscured=<args> Search for obscured versions of header files\n"); + /* end-sanitize-obscured-headers */ + printf (" -include <file> Include the contents of <file> before other files\n"); + printf (" -imacros <file> Accept definition of marcos in <file>\n"); + printf (" -iprefix <path> Specify <path> as a prefix for next two options\n"); + printf (" -iwithprefix <dir> Add <dir> to the end of the system include paths\n"); + printf (" -iwithprefixbefore <dir> Add <dir> to the end of the main include paths\n"); + printf (" -isystem <dir> Add <dir> to the start of the system include paths\n"); + printf (" -idirafter <dir> Add <dir> to the end of the system include paths\n"); + printf (" -I <dir> Add <dir> to the end of the main include paths\n"); + printf (" -nostdinc Do not search the system include directories\n"); + printf (" -nostdinc++ Do not search the system include directories for C++\n"); + printf (" -o <file> Put output into <file>\n"); + printf (" -pedantic Issue all warnings demanded by strict ANSI C\n"); + printf (" -traditional Follow K&R pre-processor behaviour\n"); + printf (" -trigraphs Support ANSI C trigraphs\n"); + printf (" -lang-c Assume that the input sources are in C\n"); + printf (" -lang-c89 Assume that the input sources are in C89\n"); + printf (" -lang-c++ Assume that the input sources are in C++\n"); + printf (" -lang-objc Assume that the input sources are in ObjectiveC\n"); + printf (" -lang-objc++ Assume that the input sources are in ObjectiveC++\n"); + printf (" -lang-asm Assume that the input sources are in assembler\n"); + printf (" -lang-chill Assume that the input sources are in Chill\n"); + printf (" -+ Allow parsing of C++ style features\n"); + printf (" -w Inhibit warning messages\n"); + printf (" -Wtrigraphs Warn if trigraphs are encountered\n"); + printf (" -Wno-trigraphs Do not warn about trigraphs\n"); + printf (" -Wcomment{s} Warn if one comment starts inside another\n"); + printf (" -Wno-comment{s} Do not warn about comments\n"); + printf (" -Wtraditional Warn if a macro argument is/would be turned into\n"); + printf (" a string if -tradtional is specified\n"); + printf (" -Wno-traditional Do not warn about stringification\n"); + printf (" -Wundef Warn if an undefined macro is used by #if\n"); + printf (" -Wno-undef Do not warn about testing udefined macros\n"); + printf (" -Wimport Warn about the use of the #import directive\n"); + printf (" -Wno-import Do not warn about the use of #import\n"); + printf (" -Werror Treat all warnings as errors\n"); + printf (" -Wno-error Do not treat warnings as errors\n"); + printf (" -Wall Enable all preprocessor warnings\n"); + printf (" -M Generate make dependencies\n"); + printf (" -MM As -M, but ignore system header files\n"); + printf (" -MD As -M, but put output in a .d file\n"); + printf (" -MMD As -MD, but ignore system header files\n"); + printf (" -MG Treat missing header file as generated files\n"); + printf (" -g Include #define and #undef directives in the output\n"); + printf (" -D<macro> Define a <macro> with string '1' as its value\n"); + printf (" -D<macro>=<val> Define a <macro> with <val> as its value\n"); + printf (" -A<question> (<answer>) Assert the <answer> to <question>\n"); + printf (" -U<macro> Undefine <macro> \n"); + printf (" -u or -undef Do not predefine any macros\n"); + printf (" -v Display the version number\n"); + printf (" -H Print the name of header files as they are used\n"); + printf (" -C Do not discard comments\n"); + printf (" -dM Display a list of macro definitions active at end\n"); + printf (" -dD Preserve macro definitions in output\n"); + printf (" -dN As -dD except that only the names are preserved\n"); + printf (" -dI Include #include directives in the output\n"); + printf (" -ifoutput Describe skipped code blocks in output \n"); + printf (" -P Do not generate #line directives\n"); + printf (" -$ Do not include '$' in identifiers\n"); + printf (" -remap Remap file names when including files.\n"); + printf (" -h or --help Display this information\n"); +} + + /* Handle one command-line option in (argc, argv). Can be called multiple times, to handle multiple sets of options. Returns number of strings consumed. */ @@ -6249,8 +6323,8 @@ cpp_handle_option (pfile, argc, argv) if (argv[i][0] != '-') { if (opts->out_fname != NULL) { - cpp_fatal (pfile, "Usage: %s [switches] input output", argv[0]); - return argc; + print_help (); + cpp_fatal (pfile, "Too many arguments"); } else if (opts->in_fname != NULL) opts->out_fname = argv[i]; @@ -6576,6 +6650,12 @@ cpp_handle_option (pfile, argc, argv) opts->debug_output = 1; break; + case '-': + if (strcmp (argv[i], "--help") != 0) + return i; + print_help (); + break; + case 'v': fprintf (stderr, "GNU CPP version %s", version_string); #ifdef TARGET_VERSION |