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Diffstat (limited to 'gcc/c-family/cppspec.c')
| -rw-r--r-- | gcc/c-family/cppspec.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/gcc/c-family/cppspec.c b/gcc/c-family/cppspec.c new file mode 100644 index 00000000000..c9ff70e5544 --- /dev/null +++ b/gcc/c-family/cppspec.c @@ -0,0 +1,198 @@ +/* Specific flags and argument handling of the C preprocessor. + Copyright (C) 1999, 2007, 2010, 2011 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "gcc.h" +#include "opts.h" + +/* The `cpp' executable installed in $(bindir) and $(cpp_install_dir) + is a customized version of the gcc driver. It forces -E; -S and -c + are errors. It defaults to -x c for files with unrecognized + extensions, unless -x options appear in argv, in which case we + assume the user knows what they're doing. If no explicit input is + mentioned, it will read stdin. */ + +/* Suffixes for known sorts of input files. Note that we do not list + files which are normally considered to have been preprocessed already, + since the user's expectation is that `cpp' always preprocesses. */ +static const char *const known_suffixes[] = +{ + ".c", ".C", ".S", ".m", + ".cc", ".cxx", ".cpp", ".cp", ".c++", + ".sx", + NULL +}; + +/* Filter the command line before processing by the gcc driver proper. */ +void +lang_specific_driver (struct cl_decoded_option **in_decoded_options, + unsigned int *in_decoded_options_count, + int *in_added_libraries ATTRIBUTE_UNUSED) +{ + struct cl_decoded_option *decoded_options = *in_decoded_options; + unsigned int argc = *in_decoded_options_count; + + /* Do we need to read stdin? */ + int read_stdin = 1; + + /* Do we need to insert -E? */ + int need_E = 1; + + /* Have we seen an input file? */ + int seen_input = 0; + + /* Positions to insert -xc, -xassembler-with-cpp, and -o, if necessary. + 0 means unnecessary. */ + unsigned int lang_c_here = 0; + unsigned int lang_S_here = 0; + unsigned int o_here = 0; + + /* Do we need to fix up an input file with an unrecognized suffix? */ + int need_fixups = 1; + + unsigned int i, j; + struct cl_decoded_option *new_decoded_options; + unsigned int new_argc; + extern int is_cpp_driver; + + is_cpp_driver = 1; + + /* First pass. If we see an -S or -c, barf. If we see an input file, + turn off read_stdin. If we see a second input file, it is actually + the output file. If we see a third input file, barf. */ + for (i = 1; i < argc; i++) + { + switch (decoded_options[i].opt_index) + { + case OPT_E: + need_E = 0; + break; + + case OPT_S: + case OPT_c: + fatal_error ("%qs is not a valid option to the preprocessor", + decoded_options[i].orig_option_with_args_text); + return; + + case OPT_x: + need_fixups = 0; + break; + + case OPT_SPECIAL_input_file: + { + const char *file = decoded_options[i].arg; + + if (strcmp (file, "-") == 0) + read_stdin = 0; + else + { + seen_input++; + if (seen_input == 3) + { + fatal_error ("too many input files"); + return; + } + else if (seen_input == 2) + { + o_here = i; + } + else + { + read_stdin = 0; + if (need_fixups) + { + int l = strlen (file); + int known = 0; + const char *const *suff; + + for (suff = known_suffixes; *suff; suff++) + if (!strcmp (*suff, &file[l - strlen(*suff)])) + { + known = 1; + break; + } + + if (! known) + { + /* .s files are a special case; we have to + treat them like .S files so + -D__ASSEMBLER__ will be in effect. */ + if (!strcmp (".s", &file[l - 2])) + lang_S_here = i; + else + lang_c_here = i; + } + } + } + } + } + break; + } + } + + /* If we don't need to edit the command line, we can bail early. */ + + new_argc = argc + need_E + read_stdin + !!lang_c_here + !!lang_S_here; + + if (new_argc == argc && !o_here) + return; + + new_decoded_options = XNEWVEC (struct cl_decoded_option, new_argc); + + new_decoded_options[0] = decoded_options[0]; + j = 1; + + if (need_E) + generate_option (OPT_E, NULL, 1, CL_DRIVER, &new_decoded_options[j++]); + + for (i = 1; i < argc; i++, j++) + { + if (i == lang_c_here) + generate_option (OPT_x, "c", 1, CL_DRIVER, &new_decoded_options[j++]); + else if (i == lang_S_here) + generate_option (OPT_x, "assembler-with-cpp", 1, CL_DRIVER, + &new_decoded_options[j++]); + else if (i == o_here) + { + generate_option (OPT_o, decoded_options[i].arg, 1, CL_DRIVER, + &new_decoded_options[j]); + continue; + } + + new_decoded_options[j] = decoded_options[i]; + } + + if (read_stdin) + generate_option_input_file ("-", &new_decoded_options[j++]); + + *in_decoded_options_count = new_argc; + *in_decoded_options = new_decoded_options; +} + +/* Called before linking. Returns 0 on success and -1 on failure. */ +int lang_specific_pre_link (void) +{ + return 0; /* Not used for cpp. */ +} + +/* Number of extra output files that lang_specific_pre_link may generate. */ +int lang_specific_extra_outfiles = 0; /* Not used for cpp. */ |