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// file : libbuild2/cc/compile-rule.hxx -*- C++ -*-
// 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/file-cache.hxx>
#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 simple_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;
public:
using appended_libraries = small_vector<const file*, 256>;
void
append_library_options (appended_libraries&, strings&,
const scope&,
action, const file&, bool, linfo) const;
optional<path>
find_system_header (const path&) const;
protected:
static void
functions (function_family&, const char*); // functions.cxx
private:
struct match_data;
using environment = small_vector<const char*, 2>;
template <typename T>
void
append_sys_hdr_options (T&) const;
template <typename T>
void
append_library_options (appended_libraries&, T&,
const scope&,
action, const file&, bool, linfo,
library_cache*) const;
template <typename T>
void
append_library_options (T&,
const scope&,
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_library_prefixes (prefix_map&,
const scope&,
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;
bool
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, bool,
optional<prefix_map>&, srcout_map&) const;
optional<bool>
inject_header (action, file&, const file&, timestamp, bool) const;
pair<file_cache::entry, bool>
extract_headers (action, const scope&, file&, linfo,
const file&, match_data&,
depdb&, bool&, timestamp, module_imports&) const;
string
parse_unit (action, file&, linfo,
const file&, file_cache::entry&,
const match_data&, const path&,
unit&) 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;
pair<dir_path, const scope&>
find_modules_sidebuild (const scope&) const;
const file&
make_module_sidebuild (action, const scope&, const file&,
const target&, const string&) const;
const file&
make_header_sidebuild (action, const scope&, const file&,
linfo, const file&) const;
void
append_header_options (environment&, cstrings&, small_vector<string, 2>&,
action, const file&,
const match_data&, const path&) const;
void
append_module_options (environment&, cstrings&, small_vector<string, 2>&,
action, const file&,
const match_data&, const path&) const;
// Compiler-specific language selection options. 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
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