Gcc 3.4.2 20040728.

1 files changed, 364 insertions, 0 deletions

diff --git a/contrib/gcc/c-incpath.c b/contrib/gcc/c-incpath.c
new file mode 100644
index 0000000..b90bb7f
--- /dev/null
+++ b/contrib/gcc/c-incpath.c
@@ -0,0 +1,364 @@
+/* Set up combined include path chain for the preprocessor.
+   Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+   1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+
+   Broken out of cppinit.c and cppfiles.c and rewritten Mar 2003.
+
+This program 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.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "cpplib.h"
+#include "prefix.h"
+#include "intl.h"
+#include "c-incpath.h"
+#include "cppdefault.h"
+
+/* Windows does not natively support inodes, and neither does MSDOS.
+   Cygwin's emulation can generate non-unique inodes, so don't use it.
+   VMS has non-numeric inodes.  */
+#ifdef VMS
+# define INO_T_EQ(A, B) (!memcmp (&(A), &(B), sizeof (A)))
+# define INO_T_COPY(DEST, SRC) memcpy(&(DEST), &(SRC), sizeof (SRC))
+#else
+# if (defined _WIN32 && ! defined (_UWIN)) || defined __MSDOS__
+#  define INO_T_EQ(A, B) 0
+# else
+#  define INO_T_EQ(A, B) ((A) == (B))
+# endif
+# define INO_T_COPY(DEST, SRC) (DEST) = (SRC)
+#endif
+
+static void add_env_var_paths (const char *, int);
+static void add_standard_paths (const char *, const char *, int);
+static void free_path (struct cpp_dir *, int);
+static void merge_include_chains (cpp_reader *, int);
+static struct cpp_dir *remove_duplicates (cpp_reader *, struct cpp_dir *,
+					   struct cpp_dir *,
+					   struct cpp_dir *, int);
+
+/* Include chains heads and tails.  */
+static struct cpp_dir *heads[4];
+static struct cpp_dir *tails[4];
+static bool quote_ignores_source_dir;
+enum { REASON_QUIET = 0, REASON_NOENT, REASON_DUP, REASON_DUP_SYS };
+
+/* Free an element of the include chain, possibly giving a reason.  */
+static void
+free_path (struct cpp_dir *path, int reason)
+{
+  switch (reason)
+    {
+    case REASON_DUP:
+    case REASON_DUP_SYS:
+      fprintf (stderr, _("ignoring duplicate directory \"%s\"\n"), path->name);
+      if (reason == REASON_DUP_SYS)
+	fprintf (stderr,
+ _("  as it is a non-system directory that duplicates a system directory\n"));
+      break;
+
+    case REASON_NOENT:
+      fprintf (stderr, _("ignoring nonexistent directory \"%s\"\n"),
+	       path->name);
+      break;
+
+    case REASON_QUIET:
+    default:
+      break;
+    }
+
+  free (path->name);
+  free (path);
+}
+
+/* Read ENV_VAR for a PATH_SEPARATOR-separated list of file names; and
+   append all the names to the search path CHAIN.  */
+static void
+add_env_var_paths (const char *env_var, int chain)
+{
+  char *p, *q, *path;
+
+  GET_ENVIRONMENT (q, env_var);
+
+  if (!q)
+    return;
+
+  for (p = q; *q; p = q + 1)
+    {
+      q = p;
+      while (*q != 0 && *q != PATH_SEPARATOR)
+	q++;
+
+      if (p == q)
+	path = xstrdup (".");
+      else
+	{
+	  path = xmalloc (q - p + 1);
+	  memcpy (path, p, q - p);
+	  path[q - p] = '\0';
+	}
+
+      add_path (path, chain, chain == SYSTEM);
+    }
+}
+
+/* Append the standard include chain defined in cppdefault.c.  */
+static void
+add_standard_paths (const char *sysroot, const char *iprefix, int cxx_stdinc)
+{
+  const struct default_include *p;
+  size_t len;
+
+  if (iprefix && (len = cpp_GCC_INCLUDE_DIR_len) != 0)
+    {
+      /* Look for directories that start with the standard prefix.
+	 "Translate" them, ie. replace /usr/local/lib/gcc... with
+	 IPREFIX and search them first.  */
+      for (p = cpp_include_defaults; p->fname; p++)
+	{
+	  if (!p->cplusplus || cxx_stdinc)
+	    {
+	      /* Should we be translating sysrooted dirs too?  Assume
+		 that iprefix and sysroot are mutually exclusive, for
+		 now.  */
+	      if (sysroot && p->add_sysroot)
+		continue;
+	      if (!strncmp (p->fname, cpp_GCC_INCLUDE_DIR, len))
+		{
+		  char *str = concat (iprefix, p->fname + len, NULL);
+		  add_path (str, SYSTEM, p->cxx_aware);
+		}
+	    }
+	}
+    }
+
+  for (p = cpp_include_defaults; p->fname; p++)
+    {
+      if (!p->cplusplus || cxx_stdinc)
+	{
+	  char *str;
+
+	  /* Should this directory start with the sysroot?  */
+	  if (sysroot && p->add_sysroot)
+	    str = concat (sysroot, p->fname, NULL);
+	  else
+	    str = update_path (p->fname, p->component);
+
+	  add_path (str, SYSTEM, p->cxx_aware);
+	}
+    }
+}
+
+/* For each duplicate path in chain HEAD, keep just the first one.
+   Remove each path in chain HEAD that also exists in chain SYSTEM.
+   Set the NEXT pointer of the last path in the resulting chain to
+   JOIN, unless it duplicates JOIN in which case the last path is
+   removed.  Return the head of the resulting chain.  Any of HEAD,
+   JOIN and SYSTEM can be NULL.  */
+static struct cpp_dir *
+remove_duplicates (cpp_reader *pfile, struct cpp_dir *head,
+		   struct cpp_dir *system, struct cpp_dir *join,
+		   int verbose)
+{
+  struct cpp_dir **pcur, *tmp, *cur;
+  struct stat st;
+
+  for (pcur = &head; *pcur; )
+    {
+      int reason = REASON_QUIET;
+
+      cur = *pcur;
+
+      if (stat (cur->name, &st))
+	{
+	  /* Dirs that don't exist are silently ignored, unless verbose.  */
+	  if (errno != ENOENT)
+	    cpp_errno (pfile, CPP_DL_ERROR, cur->name);
+	  else
+	    reason = REASON_NOENT;
+	}
+      else if (!S_ISDIR (st.st_mode))
+	cpp_error_with_line (pfile, CPP_DL_ERROR, 0, 0,
+			     "%s: not a directory", cur->name);
+      else
+	{
+	  INO_T_COPY (cur->ino, st.st_ino);
+	  cur->dev  = st.st_dev;
+
+	  /* Remove this one if it is in the system chain.  */
+	  reason = REASON_DUP_SYS;
+	  for (tmp = system; tmp; tmp = tmp->next)
+	    if (INO_T_EQ (tmp->ino, cur->ino) && tmp->dev == cur->dev)
+	      break;
+
+	  if (!tmp)
+	    {
+	      /* Duplicate of something earlier in the same chain?  */
+	      reason = REASON_DUP;
+	      for (tmp = head; tmp != cur; tmp = tmp->next)
+		if (INO_T_EQ (cur->ino, tmp->ino) && cur->dev == tmp->dev)
+		  break;
+
+	      if (tmp == cur
+		  /* Last in the chain and duplicate of JOIN?  */
+		  && !(cur->next == NULL && join
+		       && INO_T_EQ (cur->ino, join->ino)
+		       && cur->dev == join->dev))
+		{
+		  /* Unique, so keep this directory.  */
+		  pcur = &cur->next;
+		  continue;
+		}
+	    }
+	}
+
+      /* Remove this entry from the chain.  */
+      *pcur = cur->next;
+      free_path (cur, verbose ? reason: REASON_QUIET);
+    }
+
+  *pcur = join;
+  return head;
+}
+
+/* Merge the four include chains together in the order quote, bracket,
+   system, after.  Remove duplicate dirs (as determined by
+   INO_T_EQ()).
+
+   We can't just merge the lists and then uniquify them because then
+   we may lose directories from the <> search path that should be
+   there; consider -Ifoo -Ibar -I- -Ifoo -Iquux.  It is however safe
+   to treat -Ibar -Ifoo -I- -Ifoo -Iquux as if written -Ibar -I- -Ifoo
+   -Iquux.  */
+static void
+merge_include_chains (cpp_reader *pfile, int verbose)
+{
+  /* Join the SYSTEM and AFTER chains.  Remove duplicates in the
+     resulting SYSTEM chain.  */
+  if (heads[SYSTEM])
+    tails[SYSTEM]->next = heads[AFTER];
+  else
+    heads[SYSTEM] = heads[AFTER];
+  heads[SYSTEM] = remove_duplicates (pfile, heads[SYSTEM], 0, 0, verbose);
+
+  /* Remove duplicates from BRACKET that are in itself or SYSTEM, and
+     join it to SYSTEM.  */
+  heads[BRACKET] = remove_duplicates (pfile, heads[BRACKET], heads[SYSTEM],
+				      heads[SYSTEM], verbose);
+
+  /* Remove duplicates from QUOTE that are in itself or SYSTEM, and
+     join it to BRACKET.  */
+  heads[QUOTE] = remove_duplicates (pfile, heads[QUOTE], heads[SYSTEM],
+				    heads[BRACKET], verbose);
+
+  /* If verbose, print the list of dirs to search.  */
+  if (verbose)
+    {
+      struct cpp_dir *p;
+
+      fprintf (stderr, _("#include \"...\" search starts here:\n"));
+      for (p = heads[QUOTE];; p = p->next)
+	{
+	  if (p == heads[BRACKET])
+	    fprintf (stderr, _("#include <...> search starts here:\n"));
+	  if (!p)
+	    break;
+	  fprintf (stderr, " %s\n", p->name);
+	}
+      fprintf (stderr, _("End of search list.\n"));
+    }
+}
+
+/* Use given -I paths for #include "..." but not #include <...>, and
+   don't search the directory of the present file for #include "...".
+   (Note that -I. -I- is not the same as the default setup; -I. uses
+   the compiler's working dir.)  */
+void
+split_quote_chain (void)
+{
+  heads[QUOTE] = heads[BRACKET];
+  tails[QUOTE] = tails[BRACKET];
+  heads[BRACKET] = NULL;
+  tails[BRACKET] = NULL;
+  /* This is NOT redundant.  */
+  quote_ignores_source_dir = true;
+}
+
+/* Add PATH to the include chain CHAIN. PATH must be malloc-ed and
+   NUL-terminated.  */
+void
+add_path (char *path, int chain, int cxx_aware)
+{
+  struct cpp_dir *p;
+
+#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
+  /* Convert all backslashes to slashes.  The native CRT stat()
+     function does not recognise a directory that ends in a backslash
+     (unless it is a drive root dir, such "c:\").  Forward slashes,
+     trailing or otherwise, cause no problems for stat().  */
+  char* c;
+  for (c = path; *c; c++)
+    if (*c == '\\') *c = '/';
+#endif
+
+  p = xmalloc (sizeof (struct cpp_dir));
+  p->next = NULL;
+  p->name = path;
+  if (chain == SYSTEM || chain == AFTER)
+    p->sysp = 1 + !cxx_aware;
+  else
+    p->sysp = 0;
+
+  if (tails[chain])
+    tails[chain]->next = p;
+  else
+    heads[chain] = p;
+  tails[chain] = p;
+}
+
+/* Exported function to handle include chain merging, duplicate
+   removal, and registration with cpplib.  */
+void
+register_include_chains (cpp_reader *pfile, const char *sysroot,
+			 const char *iprefix, int stdinc, int cxx_stdinc,
+			 int verbose)
+{
+  static const char *const lang_env_vars[] =
+    { "C_INCLUDE_PATH", "CPLUS_INCLUDE_PATH",
+      "OBJC_INCLUDE_PATH", "OBJCPLUS_INCLUDE_PATH" };
+  cpp_options *cpp_opts = cpp_get_options (pfile);
+  size_t idx = (cpp_opts->objc ? 2: 0);
+
+  if (cpp_opts->cplusplus)
+    idx++;
+  else
+    cxx_stdinc = false;
+
+  /* CPATH and language-dependent environment variables may add to the
+     include chain.  */
+  add_env_var_paths ("CPATH", BRACKET);
+  add_env_var_paths (lang_env_vars[idx], SYSTEM);
+
+  /* Finally chain on the standard directories.  */
+  if (stdinc)
+    add_standard_paths (sysroot, iprefix, cxx_stdinc);
+
+  merge_include_chains (pfile, verbose);
+
+  cpp_set_include_chains (pfile, heads[QUOTE], heads[BRACKET],
+			  quote_ignores_source_dir);
+}