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Diffstat (limited to 'libbuild2/cc/compile-rule.hxx')
| -rw-r--r-- | libbuild2/cc/compile-rule.hxx | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/libbuild2/cc/compile-rule.hxx b/libbuild2/cc/compile-rule.hxx new file mode 100644 index 0000000..93972a2 --- /dev/null +++ b/libbuild2/cc/compile-rule.hxx @@ -0,0 +1,189 @@ +// file : libbuild2/cc/compile-rule.hxx -*- C++ -*- +// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd +// license : MIT; see accompanying LICENSE file + +#ifndef LIBBUILD2_CC_COMPILE_RULE_HXX +#define LIBBUILD2_CC_COMPILE_RULE_HXX + +#include <libbuild2/types.hxx> +#include <libbuild2/utility.hxx> + +#include <libbuild2/rule.hxx> +#include <libbuild2/filesystem.hxx> // auto_rmfile + +#include <libbuild2/cc/types.hxx> +#include <libbuild2/cc/common.hxx> + +#include <libbuild2/cc/export.hxx> + +namespace build2 +{ + class depdb; + + namespace cc + { + // The order is arranged so that their integral values indicate whether + // one is a "stronger" than another. + // + enum class preprocessed: uint8_t {none, includes, modules, all}; + + // Positions of the re-exported bmi{}s. See search_modules() for + // details. + // + struct module_positions + { + size_t start; // First imported bmi*{}, 0 if none. + size_t exported; // First re-exported bmi*{}, 0 if none. + size_t copied; // First copied-over bmi*{}, 0 if none. + }; + + class LIBBUILD2_CC_SYMEXPORT compile_rule: public rule, virtual common + { + public: + compile_rule (data&&); + + virtual bool + match (action, target&, const string&) const override; + + virtual recipe + apply (action, target&) const override; + + target_state + perform_update (action, const target&) const; + + target_state + perform_clean (action, const target&) const; + + private: + struct match_data; + using environment = small_vector<const char*, 2>; + + void + append_lib_options (const scope&, + cstrings&, + action, + const target&, + linfo) const; + + void + hash_lib_options (const scope&, + sha256&, + action, + const target&, + linfo) const; + + // Mapping of include prefixes (e.g., foo in <foo/bar>) for auto- + // generated headers to directories where they will be generated. + // + // We are using a prefix map of directories (dir_path_map) instead of + // just a map in order to also cover sub-paths (e.g., <foo/more/bar> if + // we continue with the example). Specifically, we need to make sure we + // don't treat foobar as a sub-directory of foo. + // + // The priority is used to decide who should override whom. Lesser + // values are considered higher priority. See append_prefixes() for + // details. + // + // @@ The keys should be normalized. + // + struct prefix_value + { + dir_path directory; + size_t priority; + }; + using prefix_map = dir_path_map<prefix_value>; + + void + append_prefixes (prefix_map&, const target&, const variable&) const; + + void + append_lib_prefixes (const scope&, + prefix_map&, + action, + target&, + linfo) const; + + prefix_map + build_prefix_map (const scope&, action, target&, linfo) const; + + small_vector<const target_type*, 2> + map_extension (const scope&, const string&, const string&) const; + + // Src-to-out re-mapping. See extract_headers() for details. + // + using srcout_map = path_map<dir_path>; + + struct module_mapper_state; + + void + gcc_module_mapper (module_mapper_state&, + action, const scope&, file&, linfo, + ifdstream&, ofdstream&, + depdb&, bool&, bool&, + optional<prefix_map>&, srcout_map&) const; + + pair<const file*, bool> + enter_header (action, const scope&, file&, linfo, + path&&, bool, + optional<prefix_map>&, srcout_map&) const; + + optional<bool> + inject_header (action, file&, const file&, bool, timestamp) const; + + pair<auto_rmfile, bool> + extract_headers (action, const scope&, file&, linfo, + const file&, match_data&, + depdb&, bool&, timestamp) const; + + pair<unit, string> + parse_unit (action, file&, linfo, + const file&, auto_rmfile&, + const match_data&, const path&) const; + + void + extract_modules (action, const scope&, file&, linfo, + const compile_target_types&, + const file&, match_data&, + module_info&&, depdb&, bool&) const; + + module_positions + search_modules (action, const scope&, file&, linfo, + const target_type&, + const file&, module_imports&, sha256&) const; + + dir_path + find_modules_sidebuild (const scope&) const; + + const file& + make_module_sidebuild (action, const scope&, const target&, + const target&, const string&) const; + + const file& + make_header_sidebuild (action, const scope&, linfo, const file&) const; + + void + append_headers (environment&, cstrings&, small_vector<string, 2>&, + action, const file&, + const match_data&, const path&) const; + + void + append_modules (environment&, cstrings&, small_vector<string, 2>&, + action, const file&, + const match_data&, const path&) const; + + // Compiler-specific language selection option. Return the number of + // options (arguments, really) appended. + // + size_t + append_lang_options (cstrings&, const match_data&) const; + + void + append_symexport_options (cstrings&, const target&) const; + + private: + const string rule_id; + }; + } +} + +#endif // LIBBUILD2_CC_COMPILE_RULE_HXX |