* opncls.c (_maybe_make_executable): New function. Gives execute

[deliverable/binutils-gdb.git] / gold / options.cc

diff --git a/gold/options.cc b/gold/options.cc
index 35ed86313754e8ce5e80ac2523e688c369c2f9a9..0844d53ed6075dc0808aff38c2786e0a817a6f7a 100644 (file)
--- a/gold/options.cc
+++ b/gold/options.cc
@@ -1,6 +1,6 @@
 // options.c -- handle command line options for gold
 
-// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 // Written by Ian Lance Taylor <iant@google.com>.
 
 // This file is part of gold.
@@ -402,6 +402,70 @@ General_options::parse_end_group(const char*, const char*,
   cmdline->inputs().end_group();
 }
 
+// The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
+// of names seperated by commas or colons and puts them in a linked list.
+// We implement the same parsing of names here but store names in an unordered
+// map to speed up searching of names.
+
+void
+General_options::parse_exclude_libs(const char*, const char* arg,
+                                    Command_line*)
+{
+  const char *p = arg;
+
+  while (*p != '\0')
+    {
+      size_t length = strcspn(p, ",:");
+      this->excluded_libs_.insert(std::string(p, length));
+      p += (p[length] ? length + 1 : length);
+    }
+}
+
+// The checking logic is based on the function check_excluded_libs() in
+// ld/ldlang.c of GNU ld but our implementation is different because we use
+// an unordered map instead of a linked list, which is what GNU ld uses.  GNU
+// ld searches sequentially in the excluded libs list.  For a given archive,
+// a match is found if the archive's name matches exactly one of the list
+// entry or if the archive's name is of the form FOO.a and FOO matches exactly
+// one of the list entry.  An entry "ALL" in the list is considered as a
+// wild-card and matches any given name.
+
+bool
+General_options::check_excluded_libs (const std::string &name) const
+{
+  Unordered_set<std::string>::const_iterator p;
+
+  // Exit early for the most common case.
+  if (excluded_libs_.empty())
+    return false;
+
+  // If we see "ALL", all archives are excluded from automatic export.
+  p = excluded_libs_.find(std::string("ALL"));
+  if (p != excluded_libs_.end())
+    return true;
+
+  // First strip off any directories in name.
+  const char *basename = lbasename(name.c_str());
+
+  // Try finding an exact match.
+  p = excluded_libs_.find(std::string(basename));
+  if (p != excluded_libs_.end())
+    return true;
+
+  // Try matching NAME without ".a" at the end.
+  size_t length = strlen(basename);
+  if ((length >= 2)
+      && (basename[length - 2] == '.')
+      && (basename[length - 1] == 'a'))
+    {
+      p = excluded_libs_.find(std::string(basename, length - 2));
+      if (p != excluded_libs_.end())
+       return true;
+    }
+
+  return false;
+}
+
 } // End namespace gold.
 
 namespace
@@ -451,7 +515,7 @@ string_to_object_format(const char* arg)
 // If the default sysroot is relocatable, try relocating it based on
 // the prefix FROM.
 
-char*
+static char*
 get_relative_sysroot(const char* from)
 {
   char* path = make_relative_prefix(gold::program_name, from,
@@ -472,7 +536,7 @@ get_relative_sysroot(const char* from)
 // get_relative_sysroot, which is a small memory leak, but is
 // necessary since we store this pointer directly in General_options.
 
-const char*
+static const char*
 get_default_sysroot()
 {
   const char* sysroot = TARGET_SYSTEM_ROOT;
@@ -587,7 +651,7 @@ parse_short_option(int argc, const char** argv, int pos_in_argv_i,
 
   // We handle -z as a special case.
   static gold::options::One_option dash_z("", gold::options::DASH_Z,
-                                          'z', "", "-z", "Z-OPTION", false,
+                                          'z', "", NULL, "Z-OPTION", false,
                                          NULL);
   gold::options::One_option* retval = NULL;
   if (this_argv[pos_in_argv_i] == 'z')
@@ -684,6 +748,26 @@ General_options::add_sysroot()
   free(canonical_sysroot);
 }
 
+// Return whether FILENAME is in a system directory.
+
+bool
+General_options::is_in_system_directory(const std::string& filename) const
+{
+  for (Dir_list::const_iterator p = this->library_path_.value.begin();
+       p != this->library_path_.value.end();
+       ++p)
+    {
+      // We use a straight string comparison rather than calling
+      // FILENAME_CMP because we are only interested in the cases
+      // where we found the file in a system directory, which means
+      // that we used the directory name as a prefix for a -L search.
+      if (p->is_system_directory()
+         && filename.compare(0, p->name().size(), p->name()) == 0)
+       return true;
+    }
+  return false;
+}
+
 // Add a plugin to the list of plugins.
 
 void