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Diffstat (limited to 'gold/options.h')
| -rw-r--r-- | gold/options.h | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/gold/options.h b/gold/options.h new file mode 100644 index 000000000000..56907c058ead --- /dev/null +++ b/gold/options.h @@ -0,0 +1,394 @@ +// options.h -- handle command line options for gold -*- C++ -*- + +// Command_line +// Holds everything we get from the command line. +// General_options (from Command_line::options()) +// Options which are not position dependent. +// Input_argument (from Command_line::inputs()) +// The list of input files, including -l options. +// Position_dependent_options (from Input_argument::options()) +// Position dependent options which apply to this argument. + +#ifndef GOLD_OPTIONS_H +#define GOLD_OPTIONS_H + +#include <list> +#include <string> +#include <vector> + +namespace gold +{ + +class Command_line; +class Input_file_group; + +namespace options { + +class Command_line_options; +struct One_option; + +} // End namespace gold::options. + +// The position independent options which apply to the whole link. +// There are a lot of them. + +class General_options +{ + public: + General_options(); + + // -I: dynamic linker name. + const char* + dynamic_linker() const + { return this->dynamic_linker_; } + + // -L: Library search path. + typedef std::list<const char*> Dir_list; + + const Dir_list& + search_path() const + { return this->search_path_; } + + // -o: Output file name. + const char* + output_file_name() const + { return this->output_file_name_; } + + // -r: Whether we are doing a relocatable link. + bool + is_relocatable() const + { return this->is_relocatable_; } + + // --shared: Whether generating a shared object. + bool + is_shared() const + { return this->is_shared_; } + + // --static: Whether doing a static link. + bool + is_static() const + { return this->is_static_; } + + private: + // Don't copy this structure. + General_options(const General_options&); + General_options& operator=(const General_options&); + + friend class Command_line; + friend class options::Command_line_options; + + void + set_dynamic_linker(const char* arg) + { this->dynamic_linker_ = arg; } + + void + add_to_search_path(const char* arg) + { this->search_path_.push_back(arg); } + + void + set_output_file_name(const char* arg) + { this->output_file_name_ = arg; } + + void + set_relocatable() + { this->is_relocatable_ = true; } + + void + set_shared() + { this->is_shared_ = true; } + + void + set_static() + { this->is_static_ = true; } + + void + ignore(const char*) + { } + + const char* dynamic_linker_; + Dir_list search_path_; + const char* output_file_name_; + bool is_relocatable_; + bool is_shared_; + bool is_static_; +}; + +// The current state of the position dependent options. + +class Position_dependent_options +{ + public: + Position_dependent_options(); + + // -Bstatic: Whether we are searching for a static archive rather + // than a shared object. + bool + do_static_search() const + { return this->do_static_search_; } + + // --as-needed: Whether to add a DT_NEEDED argument only if the + // dynamic object is used. + bool + as_needed() const + { return this->as_needed_; } + + void + set_static_search() + { this->do_static_search_ = true; } + + void + set_dynamic_search() + { this->do_static_search_ = false; } + + void + set_as_needed() + { this->as_needed_ = true; } + + void + clear_as_needed() + { this->as_needed_ = false; } + + private: + bool do_static_search_; + bool as_needed_; +}; + +// A single file or library argument from the command line. + +class Input_file_argument +{ + public: + Input_file_argument() + : name_(), is_lib_(false), options_() + { } + + Input_file_argument(const char* name, bool is_lib, + const Position_dependent_options& options) + : name_(name), is_lib_(is_lib), options_(options) + { } + + const char* + name() const + { return this->name_.c_str(); } + + const Position_dependent_options& + options() const + { return this->options_; } + + bool + is_lib() const + { return this->is_lib_; } + + private: + // We use std::string, not const char*, here for convenience when + // using script files, so that we do not have to preserve the string + // in that case. + std::string name_; + bool is_lib_; + Position_dependent_options options_; +}; + +// A file or library, or a group, from the command line. + +class Input_argument +{ + public: + // Create a file or library argument. + explicit Input_argument(Input_file_argument file) + : is_file_(true), file_(file), group_(NULL) + { } + + // Create a group argument. + explicit Input_argument(Input_file_group* group) + : is_file_(false), group_(group) + { } + + // Return whether this is a file. + bool + is_file() const + { return this->is_file_; } + + // Return whether this is a group. + bool + is_group() const + { return !this->is_file_; } + + // Return the information about the file. + const Input_file_argument& + file() const + { + gold_assert(this->is_file_); + return this->file_; + } + + // Return the information about the group. + const Input_file_group* + group() const + { + gold_assert(!this->is_file_); + return this->group_; + } + + Input_file_group* + group() + { + gold_assert(!this->is_file_); + return this->group_; + } + + private: + bool is_file_; + Input_file_argument file_; + Input_file_group* group_; +}; + +// A group from the command line. This is a set of arguments within +// --start-group ... --end-group. + +class Input_file_group +{ + public: + typedef std::vector<Input_argument> Files; + typedef Files::const_iterator const_iterator; + + Input_file_group() + : files_() + { } + + // Add a file to the end of the group. + void + add_file(const Input_file_argument& arg) + { this->files_.push_back(Input_argument(arg)); } + + // Iterators to iterate over the group contents. + + const_iterator + begin() const + { return this->files_.begin(); } + + const_iterator + end() const + { return this->files_.end(); } + + private: + Files files_; +}; + +// A list of files from the command line or a script. + +class Input_arguments +{ + public: + typedef std::vector<Input_argument> Input_argument_list; + typedef Input_argument_list::const_iterator const_iterator; + + Input_arguments() + : input_argument_list_(), in_group_(false) + { } + + // Add a file. + void + add_file(const Input_file_argument& arg); + + // Start a group (the --start-group option). + void + start_group(); + + // End a group (the --end-group option). + void + end_group(); + + // Return whether we are currently in a group. + bool + in_group() const + { return this->in_group_; } + + // Iterators to iterate over the list of input files. + + const_iterator + begin() const + { return this->input_argument_list_.begin(); } + + const_iterator + end() const + { return this->input_argument_list_.end(); } + + // Return whether the list is empty. + bool + empty() const + { return this->input_argument_list_.empty(); } + + private: + Input_argument_list input_argument_list_; + bool in_group_; +}; + +// All the information read from the command line. + +class Command_line +{ + public: + typedef Input_arguments::const_iterator const_iterator; + + Command_line(); + + // Process the command line options. This will exit with an + // appropriate error message if an unrecognized option is seen. + void + process(int argc, char** argv); + + // Handle a -l option. + int + process_l_option(int, char**, char*); + + // Handle a --start-group option. + void + start_group(const char* arg); + + // Handle a --end-group option. + void + end_group(const char* arg); + + // Get the general options. + const General_options& + options() const + { return this->options_; } + + // Iterators to iterate over the list of input files. + + const_iterator + begin() const + { return this->inputs_.begin(); } + + const_iterator + end() const + { return this->inputs_.end(); } + + private: + Command_line(const Command_line&); + Command_line& operator=(const Command_line&); + + // Report usage error. + void + usage() ATTRIBUTE_NORETURN; + void + usage(const char* msg, const char* opt) ATTRIBUTE_NORETURN; + void + usage(const char* msg, char opt) ATTRIBUTE_NORETURN; + + // Apply a command line option. + void + apply_option(const gold::options::One_option&, const char*); + + // Add a file. + void + add_file(const char* name, bool is_lib); + + General_options options_; + Position_dependent_options position_options_; + Input_arguments inputs_; +}; + +} // End namespace gold. + +#endif // !defined(GOLD_OPTIONS_H) |