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Diffstat (limited to 'gcc/cppspec.c')
| -rw-r--r-- | gcc/cppspec.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/gcc/cppspec.c b/gcc/cppspec.c new file mode 100644 index 00000000000..387b1ce4d1f --- /dev/null +++ b/gcc/cppspec.c @@ -0,0 +1,225 @@ +/* Specific flags and argument handling of the C preprocessor. + Copyright (C) 1999 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC 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 2, or (at your option) +any later version. + +GNU CC 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 GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "config.h" +#include "system.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. */ + +/* Snarfed from gcc.c: */ + +/* This defines which switch letters take arguments. */ + +#define DEFAULT_SWITCH_TAKES_ARG(CHAR) \ + ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o' \ + || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \ + || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x' \ + || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V' \ + || (CHAR) == 'B' || (CHAR) == 'b') + +#ifndef SWITCH_TAKES_ARG +#define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR) +#endif + +/* This defines which multi-letter switches take arguments. */ + +#define DEFAULT_WORD_SWITCH_TAKES_ARG(STR) \ + (!strcmp (STR, "Tdata") || !strcmp (STR, "Ttext") \ + || !strcmp (STR, "Tbss") || !strcmp (STR, "include") \ + || !strcmp (STR, "imacros") || !strcmp (STR, "aux-info") \ + || !strcmp (STR, "idirafter") || !strcmp (STR, "iprefix") \ + || !strcmp (STR, "iwithprefix") || !strcmp (STR, "iwithprefixbefore") \ + || !strcmp (STR, "isystem") || !strcmp (STR, "specs")) + +#ifndef WORD_SWITCH_TAKES_ARG +#define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR) +#endif + +/* Suffixes for known sorts of input files. We let gcc.c worry about + which are appropriate preprocessor input. */ +static const char *const known_suffixes[] = +{ + ".c", ".C", ".s", ".S", ".m", + ".cc", ".cxx", ".cpp", ".cp", ".c++", + ".i", ".ii", ".mi", ".o", ".a", + NULL +}; + +/* Filter argc and argv before processing by the gcc driver proper. */ +void +lang_specific_driver (errfn, in_argc, in_argv, in_added_libraries) + void (*errfn) PVPROTO((const char *, ...)); + int *in_argc; + char ***in_argv; + int *in_added_libraries ATTRIBUTE_UNUSED; +{ + int argc = *in_argc; + char **argv = *in_argv; + + /* Do we need to read stdin? */ + int read_stdin; + + /* Do we need to insert -E? */ + int need_E; + + /* Do we need to fixup files with unrecognized suffixes? */ + int need_fixups; + + /* Table of input files with unrecognized suffixes. */ + char *urs_tab; + int urs_count; + int urs_block; + + int i, j, quote; + char **new_argv; + int new_argc; + + /* First pass. If we see an -S or -c, barf. If we see an input file, + turn off read_stdin, and if it has an unrecognizable suffix, mark + it for fixup. */ + urs_tab = xmalloc (argc); + memset (urs_tab, 0, argc); + urs_count = 0; + urs_block = 0; + quote = 0; + read_stdin = 1; + need_E = 1; + need_fixups = 1; + for (i = 1; i < argc; i++) + { + if (quote == 1) + { + quote = 0; + continue; + } + + if (argv[i][0] == '-') + { + if (argv[i][1] == '\0') + read_stdin = 0; + else if (argv[i][2] == '\0') + { + if (argv[i][1] == 'E') + need_E = 0; + else if (argv[i][1] == 'S' || argv[i][1] == 'c') + { + (*errfn) ("`%s' is not a legal option to the preprocessor", + argv[i]); + goto done; + } + else if (argv[i][1] == 'x') + { + need_fixups = 0; + quote = 1; + } + else if (SWITCH_TAKES_ARG (argv[i][1])) + quote = 1; + } + else if (argv[i][1] == 'x') + need_fixups = 0; + else if (WORD_SWITCH_TAKES_ARG (&argv[i][1])) + quote = 1; + } + else /* not an option */ + { + int l = strlen (argv[i]); + int known = 0; + const char **suff; + + read_stdin = 0; + for (suff = known_suffixes; *suff; suff++) + if (!strcmp (*suff, &argv[i][l - strlen(*suff)])) + { + known = 1; + break; + } + + if (known) + { + if (urs_block) + { + urs_block = 0; + urs_tab[i] = 2; + urs_count++; + } + } + else + { + if (!urs_block) + { + urs_block = 1; + urs_tab[i] = 1; + urs_count++; + } + } + } + } + + /* If we were given an -E option and an input file, and no input + files have unrecognized suffixes, we can bail early. */ + if (!need_E && !read_stdin && (!need_fixups || urs_count == 0)) + goto done; + + new_argc = argc + need_E + read_stdin + (need_fixups ? urs_count : 0); + new_argv = xmalloc (new_argc * sizeof(char *)); + + new_argv[0] = argv[0]; + if (need_E) + { + new_argv[1] = "-E"; + j = 2; + } + else + j = 1; + + if (need_fixups) + for (i = 1; i < argc; i++, j++) + { + if (urs_tab[i]) + new_argv[j++] = (urs_tab[i] == 1) ? "-xc" : "-xnone"; + + new_argv[j] = argv[i]; + } + else + memcpy (&new_argv[j], &argv[1], (argc - 1)*sizeof (char *)); + + if (read_stdin) + new_argv[j] = "-"; + + *in_argc = new_argc; + *in_argv = new_argv; + +done: + free (urs_tab); +} + +/* Called before linking. Returns 0 on success and -1 on failure. */ +int lang_specific_pre_link () +{ + 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. */ |