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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
#pragma once
#include "cmConfigure.h" // IWYU pragma: keep
#include <map>
#include <ostream>
#include <string>
#include <unordered_map>
#include <vector>
#include <cm/optional>
#include <cmext/algorithm>
#include "cmListFileCache.h"
#include "cmSystemTools.h"
#include "cmTargetLinkLibraryType.h"
class cmGeneratorTarget;
class cmSourceFile;
// Basic information about each link item.
class cmLinkItem
{
std::string String;
public:
// default feature: link library without decoration
static std::string const DEFAULT;
cmLinkItem() = default;
cmLinkItem(std::string s, bool c, cmListFileBacktrace bt,
std::string feature = DEFAULT);
cmLinkItem(cmGeneratorTarget const* t, bool c, cmListFileBacktrace bt,
std::string feature = DEFAULT);
std::string const& AsStr() const;
cmGeneratorTarget const* Target = nullptr;
// The source file representing the external object (used when linking
// `$<TARGET_OBJECTS>`)
cmSourceFile const* ObjectSource = nullptr;
std::string Feature;
bool Cross = false;
cmListFileBacktrace Backtrace;
friend bool operator<(cmLinkItem const& l, cmLinkItem const& r);
friend bool operator==(cmLinkItem const& l, cmLinkItem const& r);
friend std::ostream& operator<<(std::ostream& os, cmLinkItem const& item);
};
class cmLinkImplItem : public cmLinkItem
{
public:
cmLinkImplItem() = default;
cmLinkImplItem(cmLinkItem item);
};
/** The link implementation specifies the direct library
dependencies needed by the object files of the target. */
struct cmLinkImplementationLibraries
{
// Libraries linked directly in this configuration.
std::vector<cmLinkImplItem> Libraries;
// Object files linked directly in this configuration.
std::vector<cmLinkItem> Objects;
// Whether the list depends on a genex referencing the configuration.
bool HadContextSensitiveCondition = false;
};
struct cmLinkInterfaceLibraries
{
// Libraries listed in the interface.
std::vector<cmLinkItem> Libraries;
// Object files listed in the interface.
std::vector<cmLinkItem> Objects;
// Items to be included as if directly linked by the head target.
std::vector<cmLinkItem> HeadInclude;
// Items to be excluded from direct linking by the head target.
std::vector<cmLinkItem> HeadExclude;
// Whether the list depends on a genex referencing the head target.
bool HadHeadSensitiveCondition = false;
// Whether the list depends on a genex referencing the configuration.
bool HadContextSensitiveCondition = false;
};
struct cmLinkInterface : public cmLinkInterfaceLibraries
{
// Languages whose runtime libraries must be linked.
std::vector<std::string> Languages;
std::unordered_map<std::string, std::vector<cmLinkItem>>
LanguageRuntimeLibraries;
// Shared library dependencies needed for linking on some platforms.
std::vector<cmLinkItem> SharedDeps;
// Number of repetitions of a strongly connected component of two
// or more static libraries.
unsigned int Multiplicity = 0;
// Whether the list depends on a link language genex.
bool HadLinkLanguageSensitiveCondition = false;
};
struct cmOptionalLinkInterface : public cmLinkInterface
{
bool LibrariesDone = false;
bool AllDone = false;
bool Exists = false;
bool CheckLinkLibraries = false;
};
struct cmHeadToLinkInterfaceMap
: public std::map<cmGeneratorTarget const*, cmOptionalLinkInterface>
{
};
struct cmLinkImplementation : public cmLinkImplementationLibraries
{
// Languages whose runtime libraries must be linked.
std::vector<std::string> Languages;
std::unordered_map<std::string, std::vector<cmLinkImplItem>>
LanguageRuntimeLibraries;
// Whether the list depends on a link language genex.
bool HadLinkLanguageSensitiveCondition = false;
};
// Cache link implementation computation from each configuration.
struct cmOptionalLinkImplementation : public cmLinkImplementation
{
bool LibrariesDone = false;
bool LanguagesDone = false;
bool HadHeadSensitiveCondition = false;
bool CheckLinkLibraries = false;
};
/** Compute the link type to use for the given configuration. */
inline cmTargetLinkLibraryType ComputeLinkType(
std::string const& config, std::vector<std::string> const& debugConfigs)
{
// No configuration is always optimized.
if (config.empty()) {
return OPTIMIZED_LibraryType;
}
// Check if any entry in the list matches this configuration.
std::string configUpper = cmSystemTools::UpperCase(config);
if (cm::contains(debugConfigs, configUpper)) {
return DEBUG_LibraryType;
}
// The current configuration is not a debug configuration.
return OPTIMIZED_LibraryType;
}
// Parse LINK_LIBRARY genex markers.
cm::optional<std::string> ParseLinkFeature(std::string const& item);
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