// 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.
#include "gold.h"
+#include <cerrno>
#include <cstdlib>
#include <cstring>
+#include <fstream>
#include <vector>
#include <iostream>
#include <sys/stat.h>
namespace options
{
+// This flag is TRUE if we should register the command-line options as they
+// are constructed. It is set after contruction of the options within
+// class Position_dependent_options.
+static bool ready_to_register = false;
+
// This global variable is set up as General_options is constructed.
static std::vector<const One_option*> registered_options;
void
One_option::register_option()
{
+ if (!ready_to_register)
+ return;
+
registered_options.push_back(this);
// We can't make long_options a static Option_map because we can't
const int shortname_as_int = static_cast<int>(this->shortname);
gold_assert(shortname_as_int >= 0 && shortname_as_int < 128);
if (this->shortname != '\0')
- short_options[shortname_as_int] = this;
+ {
+ gold_assert(short_options[shortname_as_int] == NULL);
+ short_options[shortname_as_int] = this;
+ }
}
void
}
void
+parse_int(const char* option_name, const char* arg, int* retval)
+{
+ char* endptr;
+ *retval = strtol(arg, &endptr, 0);
+ if (*endptr != '\0')
+ gold_fatal(_("%s: invalid option value (expected an integer): %s"),
+ option_name, arg);
+}
+
+void
parse_uint64(const char* option_name, const char* arg, uint64_t *retval)
{
char* endptr;
void
General_options::parse_version(const char* opt, const char*, Command_line*)
{
- gold::print_version(opt[0] == '-' && opt[1] == 'v');
- ::exit(EXIT_SUCCESS);
+ bool print_short = (opt[0] == '-' && opt[1] == 'v');
+ gold::print_version(print_short);
+ this->printed_version_ = true;
+ if (!print_short)
+ ::exit(EXIT_SUCCESS);
}
void
General_options::parse_V(const char*, const char*, Command_line*)
{
gold::print_version(true);
+ this->printed_version_ = true;
printf(_(" Supported targets:\n"));
std::vector<const char*> supported_names;
gold::supported_target_names(&supported_names);
General_options::parse_library(const char*, const char* arg,
Command_line* cmdline)
{
- Input_file_argument file(arg, true, "", false, *this);
+ Input_file_argument::Input_file_type type;
+ const char *name;
+ if (arg[0] == ':')
+ {
+ type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE;
+ name = arg + 1;
+ }
+ else
+ {
+ type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY;
+ name = arg;
+ }
+ Input_file_argument file(name, type, "", false, *this);
cmdline->inputs().add_file(file);
}
General_options::parse_just_symbols(const char*, const char* arg,
Command_line* cmdline)
{
- Input_file_argument file(arg, false, "", true, *this);
+ Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", true, *this);
cmdline->inputs().add_file(file);
}
cmdline->inputs().end_group();
}
-} // End namespace gold.
-
-namespace
-{
+// 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
-usage()
+General_options::parse_exclude_libs(const char*, const char* arg,
+ Command_line*)
{
- fprintf(stderr,
- _("%s: use the --help option for usage information\n"),
- gold::program_name);
- ::exit(EXIT_FAILURE);
+ 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);
+ }
}
-void
-usage(const char* msg, const char *opt)
+// 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
{
- fprintf(stderr,
- _("%s: %s: %s\n"),
- gold::program_name, opt, msg);
- usage();
+ 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;
}
// Recognize input and output target names. The GNU linker accepts
// "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
// "binary", "ihex".
-gold::General_options::Object_format
-string_to_object_format(const char* arg)
+General_options::Object_format
+General_options::string_to_object_format(const char* arg)
{
if (strncmp(arg, "elf", 3) == 0)
return gold::General_options::OBJECT_FORMAT_ELF;
}
}
+} // End namespace gold.
+
+namespace
+{
+
+void
+usage()
+{
+ fprintf(stderr,
+ _("%s: use the --help option for usage information\n"),
+ gold::program_name);
+ ::exit(EXIT_FAILURE);
+}
+
+void
+usage(const char* msg, const char *opt)
+{
+ fprintf(stderr,
+ _("%s: %s: %s\n"),
+ gold::program_name, opt, msg);
+ usage();
+}
+
// 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,
// 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;
// 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')
{
General_options::General_options()
- : execstack_status_(General_options::EXECSTACK_FROM_INPUT), static_(false),
+ : printed_version_(false),
+ execstack_status_(General_options::EXECSTACK_FROM_INPUT), static_(false),
do_demangle_(false), plugins_(),
incremental_disposition_(INCREMENTAL_CHECK), implicit_incremental_(false)
{
+ // Turn off option registration once construction is complete.
+ gold::options::ready_to_register = false;
}
General_options::Object_format
General_options::format_enum() const
{
- return string_to_object_format(this->format());
+ return General_options::string_to_object_format(this->format());
}
General_options::Object_format
General_options::oformat_enum() const
{
- return string_to_object_format(this->oformat());
+ return General_options::string_to_object_format(this->oformat());
}
// Add the sysroot, if any, to the search paths.
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
else if (this->noexecstack())
this->set_execstack_status(EXECSTACK_NO);
+ // icf_status_ is a three-state variable; update it based on the
+ // value of this->icf().
+ if (strcmp(this->icf(), "none") == 0)
+ this->set_icf_status(ICF_NONE);
+ else if (strcmp(this->icf(), "safe") == 0)
+ this->set_icf_status(ICF_SAFE);
+ else
+ this->set_icf_status(ICF_ALL);
+
// Handle the optional argument for --demangle.
if (this->user_set_demangle())
{
this->add_to_library_path_with_sysroot("/usr/lib");
}
+ // Parse the contents of -retain-symbols-file into a set.
+ if (this->retain_symbols_file())
+ {
+ std::ifstream in;
+ in.open(this->retain_symbols_file());
+ if (!in)
+ gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
+ this->retain_symbols_file(), strerror(errno));
+ std::string line;
+ std::getline(in, line); // this chops off the trailing \n, if any
+ while (in)
+ {
+ if (!line.empty() && line[line.length() - 1] == '\r') // Windows
+ line.resize(line.length() - 1);
+ this->symbols_to_retain_.insert(line);
+ std::getline(in, line);
+ }
+ }
+
if (this->shared() && !this->user_set_allow_shlib_undefined())
this->set_allow_shlib_undefined(true);
// Now that we've normalized the options, check for contradictory ones.
if (this->shared() && this->is_static())
gold_fatal(_("-shared and -static are incompatible"));
+ if (this->shared() && this->pie())
+ gold_fatal(_("-shared and -pie are incompatible"));
if (this->shared() && this->relocatable())
gold_fatal(_("-shared and -r are incompatible"));
+ if (this->pie() && this->relocatable())
+ gold_fatal(_("-pie and -r are incompatible"));
+
+ // TODO: implement support for -retain-symbols-file with -r, if needed.
+ if (this->relocatable() && this->retain_symbols_file())
+ gold_fatal(_("-retain-symbols-file does not yet work with -r"));
if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
- && (this->shared() || this->relocatable()))
- gold_fatal(_("binary output format not compatible with -shared or -r"));
+ && (this->shared()
+ || this->pie()
+ || this->relocatable()))
+ gold_fatal(_("binary output format not compatible "
+ "with -shared or -pie or -r"));
if (this->user_set_hash_bucket_empty_fraction()
&& (this->hash_bucket_empty_fraction() < 0.0
{
}
+// Pre_options is the hook that sets the ready_to_register flag.
+
+Command_line::Pre_options::Pre_options()
+{
+ gold::options::ready_to_register = true;
+}
+
// Process the command line options. For process_one_option, i is the
// index of argv to process next, and must be an option (that is,
// start with a dash). The return value is the index of the next
this->position_options_.copy_from_options(this->options());
if (no_more_options || argv[i][0] != '-')
{
- Input_file_argument file(argv[i], false, "", false,
- this->position_options_);
+ Input_file_argument file(argv[i],
+ Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", false, this->position_options_);
this->inputs_.add_file(file);
++i;
}
this->options_.finalize();
}
+// Finalize the version script options and return them.
+
+const Version_script_info&
+Command_line::version_script()
+{
+ this->options_.finalize_dynamic_list();
+ Version_script_info* vsi = this->script_options_.version_script_info();
+ vsi->finalize();
+ return *vsi;
+}
+
} // End namespace gold.
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