414 lines
16 KiB
C++
414 lines
16 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmTargetLinkLibrariesCommand.h"
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#include "cmGeneratorExpression.h"
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const char* cmTargetLinkLibrariesCommand::LinkLibraryTypeNames[3] = {
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"general", "debug", "optimized"
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};
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// cmTargetLinkLibrariesCommand
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bool cmTargetLinkLibrariesCommand::InitialPass(
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std::vector<std::string> const& args, cmExecutionStatus&)
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{
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// must have one argument
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if (args.empty()) {
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this->SetError("called with incorrect number of arguments");
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return false;
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}
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if (this->Makefile->IsAlias(args[0])) {
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this->SetError("can not be used on an ALIAS target.");
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return false;
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}
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// Lookup the target for which libraries are specified.
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this->Target =
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this->Makefile->GetCMakeInstance()->GetGlobalGenerator()->FindTarget(
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args[0]);
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if (!this->Target) {
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cmake::MessageType t = cmake::FATAL_ERROR; // fail by default
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std::ostringstream e;
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e << "Cannot specify link libraries for target \"" << args[0] << "\" "
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<< "which is not built by this project.";
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// The bad target is the only argument. Check how policy CMP0016 is set,
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// and accept, warn or fail respectively:
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if (args.size() < 2) {
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switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0016)) {
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case cmPolicies::WARN:
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t = cmake::AUTHOR_WARNING;
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// Print the warning.
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e << "\n"
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<< "CMake does not support this but it used to work accidentally "
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<< "and is being allowed for compatibility."
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<< "\n"
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<< cmPolicies::GetPolicyWarning(cmPolicies::CMP0016);
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break;
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case cmPolicies::OLD: // OLD behavior does not warn.
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t = cmake::MESSAGE;
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break;
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case cmPolicies::REQUIRED_IF_USED:
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case cmPolicies::REQUIRED_ALWAYS:
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e << "\n" << cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0016);
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break;
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case cmPolicies::NEW: // NEW behavior prints the error.
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break;
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}
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}
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// now actually print the message
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switch (t) {
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case cmake::AUTHOR_WARNING:
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this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, e.str());
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break;
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case cmake::FATAL_ERROR:
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this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
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cmSystemTools::SetFatalErrorOccured();
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break;
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default:
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break;
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}
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return true;
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}
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if (this->Target->GetType() == cmState::OBJECT_LIBRARY) {
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std::ostringstream e;
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e << "Object library target \"" << args[0] << "\" "
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<< "may not link to anything.";
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this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
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cmSystemTools::SetFatalErrorOccured();
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return true;
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}
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if (this->Target->GetType() == cmState::UTILITY) {
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std::ostringstream e;
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const char* modal = CM_NULLPTR;
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cmake::MessageType messageType = cmake::AUTHOR_WARNING;
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switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0039)) {
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case cmPolicies::WARN:
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e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0039) << "\n";
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modal = "should";
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case cmPolicies::OLD:
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break;
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case cmPolicies::REQUIRED_ALWAYS:
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case cmPolicies::REQUIRED_IF_USED:
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case cmPolicies::NEW:
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modal = "must";
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messageType = cmake::FATAL_ERROR;
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}
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if (modal) {
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e << "Utility target \"" << this->Target->GetName() << "\" " << modal
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<< " not be used as the target of a target_link_libraries call.";
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this->Makefile->IssueMessage(messageType, e.str());
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if (messageType == cmake::FATAL_ERROR) {
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return false;
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}
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}
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}
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// but we might not have any libs after variable expansion
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if (args.size() < 2) {
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return true;
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}
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// Keep track of link configuration specifiers.
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cmTargetLinkLibraryType llt = GENERAL_LibraryType;
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bool haveLLT = false;
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// Start with primary linking and switch to link interface
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// specification if the keyword is encountered as the first argument.
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this->CurrentProcessingState = ProcessingLinkLibraries;
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// add libraries, note that there is an optional prefix
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// of debug and optimized that can be used
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for (unsigned int i = 1; i < args.size(); ++i) {
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if (args[i] == "LINK_INTERFACE_LIBRARIES") {
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this->CurrentProcessingState = ProcessingPlainLinkInterface;
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if (i != 1) {
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this->Makefile->IssueMessage(
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cmake::FATAL_ERROR,
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"The LINK_INTERFACE_LIBRARIES option must appear as the second "
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"argument, just after the target name.");
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return true;
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}
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} else if (args[i] == "INTERFACE") {
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if (i != 1 &&
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this->CurrentProcessingState != ProcessingKeywordPrivateInterface &&
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this->CurrentProcessingState != ProcessingKeywordPublicInterface &&
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this->CurrentProcessingState != ProcessingKeywordLinkInterface) {
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this->Makefile->IssueMessage(
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cmake::FATAL_ERROR, "The INTERFACE option must appear as the second "
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"argument, just after the target name.");
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return true;
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}
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this->CurrentProcessingState = ProcessingKeywordLinkInterface;
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} else if (args[i] == "LINK_PUBLIC") {
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if (i != 1 &&
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this->CurrentProcessingState != ProcessingPlainPrivateInterface &&
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this->CurrentProcessingState != ProcessingPlainPublicInterface) {
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this->Makefile->IssueMessage(
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cmake::FATAL_ERROR,
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"The LINK_PUBLIC or LINK_PRIVATE option must appear as the second "
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"argument, just after the target name.");
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return true;
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}
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this->CurrentProcessingState = ProcessingPlainPublicInterface;
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} else if (args[i] == "PUBLIC") {
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if (i != 1 &&
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this->CurrentProcessingState != ProcessingKeywordPrivateInterface &&
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this->CurrentProcessingState != ProcessingKeywordPublicInterface &&
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this->CurrentProcessingState != ProcessingKeywordLinkInterface) {
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this->Makefile->IssueMessage(
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cmake::FATAL_ERROR,
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"The PUBLIC or PRIVATE option must appear as the second "
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"argument, just after the target name.");
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return true;
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}
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this->CurrentProcessingState = ProcessingKeywordPublicInterface;
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} else if (args[i] == "LINK_PRIVATE") {
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if (i != 1 &&
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this->CurrentProcessingState != ProcessingPlainPublicInterface &&
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this->CurrentProcessingState != ProcessingPlainPrivateInterface) {
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this->Makefile->IssueMessage(
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cmake::FATAL_ERROR,
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"The LINK_PUBLIC or LINK_PRIVATE option must appear as the second "
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"argument, just after the target name.");
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return true;
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}
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this->CurrentProcessingState = ProcessingPlainPrivateInterface;
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} else if (args[i] == "PRIVATE") {
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if (i != 1 &&
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this->CurrentProcessingState != ProcessingKeywordPrivateInterface &&
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this->CurrentProcessingState != ProcessingKeywordPublicInterface &&
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this->CurrentProcessingState != ProcessingKeywordLinkInterface) {
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this->Makefile->IssueMessage(
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cmake::FATAL_ERROR,
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"The PUBLIC or PRIVATE option must appear as the second "
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"argument, just after the target name.");
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return true;
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}
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this->CurrentProcessingState = ProcessingKeywordPrivateInterface;
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} else if (args[i] == "debug") {
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if (haveLLT) {
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this->LinkLibraryTypeSpecifierWarning(llt, DEBUG_LibraryType);
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}
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llt = DEBUG_LibraryType;
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haveLLT = true;
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} else if (args[i] == "optimized") {
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if (haveLLT) {
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this->LinkLibraryTypeSpecifierWarning(llt, OPTIMIZED_LibraryType);
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}
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llt = OPTIMIZED_LibraryType;
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haveLLT = true;
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} else if (args[i] == "general") {
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if (haveLLT) {
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this->LinkLibraryTypeSpecifierWarning(llt, GENERAL_LibraryType);
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}
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llt = GENERAL_LibraryType;
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haveLLT = true;
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} else if (haveLLT) {
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// The link type was specified by the previous argument.
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haveLLT = false;
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if (!this->HandleLibrary(args[i], llt)) {
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return false;
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}
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} else {
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// Lookup old-style cache entry if type is unspecified. So if you
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// do a target_link_libraries(foo optimized bar) it will stay optimized
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// and not use the lookup. As there maybe the case where someone has
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// specifed that a library is both debug and optimized. (this check is
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// only there for backwards compatibility when mixing projects built
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// with old versions of CMake and new)
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llt = GENERAL_LibraryType;
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std::string linkType = args[0];
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linkType += "_LINK_TYPE";
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const char* linkTypeString = this->Makefile->GetDefinition(linkType);
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if (linkTypeString) {
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if (strcmp(linkTypeString, "debug") == 0) {
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llt = DEBUG_LibraryType;
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}
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if (strcmp(linkTypeString, "optimized") == 0) {
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llt = OPTIMIZED_LibraryType;
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}
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}
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if (!this->HandleLibrary(args[i], llt)) {
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return false;
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}
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}
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}
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// Make sure the last argument was not a library type specifier.
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if (haveLLT) {
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std::ostringstream e;
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e << "The \"" << this->LinkLibraryTypeNames[llt]
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<< "\" argument must be followed by a library.";
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this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
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cmSystemTools::SetFatalErrorOccured();
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}
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const cmPolicies::PolicyStatus policy22Status =
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this->Target->GetPolicyStatusCMP0022();
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// If any of the LINK_ options were given, make sure the
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// LINK_INTERFACE_LIBRARIES target property exists.
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// Use of any of the new keywords implies awareness of
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// this property. And if no libraries are named, it should
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// result in an empty link interface.
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if ((policy22Status == cmPolicies::OLD ||
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policy22Status == cmPolicies::WARN) &&
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this->CurrentProcessingState != ProcessingLinkLibraries &&
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!this->Target->GetProperty("LINK_INTERFACE_LIBRARIES")) {
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this->Target->SetProperty("LINK_INTERFACE_LIBRARIES", "");
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}
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return true;
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}
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void cmTargetLinkLibrariesCommand::LinkLibraryTypeSpecifierWarning(int left,
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int right)
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{
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std::ostringstream w;
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w << "Link library type specifier \"" << this->LinkLibraryTypeNames[left]
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<< "\" is followed by specifier \"" << this->LinkLibraryTypeNames[right]
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<< "\" instead of a library name. "
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<< "The first specifier will be ignored.";
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this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, w.str());
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}
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bool cmTargetLinkLibrariesCommand::HandleLibrary(const std::string& lib,
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cmTargetLinkLibraryType llt)
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{
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if (this->Target->GetType() == cmState::INTERFACE_LIBRARY &&
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this->CurrentProcessingState != ProcessingKeywordLinkInterface) {
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this->Makefile->IssueMessage(
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cmake::FATAL_ERROR,
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"INTERFACE library can only be used with the INTERFACE keyword of "
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"target_link_libraries");
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return false;
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}
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cmTarget::TLLSignature sig =
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(this->CurrentProcessingState == ProcessingPlainPrivateInterface ||
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this->CurrentProcessingState == ProcessingPlainPublicInterface ||
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this->CurrentProcessingState == ProcessingKeywordPrivateInterface ||
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this->CurrentProcessingState == ProcessingKeywordPublicInterface ||
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this->CurrentProcessingState == ProcessingKeywordLinkInterface)
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? cmTarget::KeywordTLLSignature
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: cmTarget::PlainTLLSignature;
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if (!this->Target->PushTLLCommandTrace(
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sig, this->Makefile->GetExecutionContext())) {
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std::ostringstream e;
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const char* modal = CM_NULLPTR;
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cmake::MessageType messageType = cmake::AUTHOR_WARNING;
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switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0023)) {
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case cmPolicies::WARN:
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e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0023) << "\n";
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modal = "should";
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case cmPolicies::OLD:
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break;
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case cmPolicies::REQUIRED_ALWAYS:
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case cmPolicies::REQUIRED_IF_USED:
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case cmPolicies::NEW:
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modal = "must";
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messageType = cmake::FATAL_ERROR;
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}
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if (modal) {
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// If the sig is a keyword form and there is a conflict, the existing
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// form must be the plain form.
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const char* existingSig =
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(sig == cmTarget::KeywordTLLSignature ? "plain" : "keyword");
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e << "The " << existingSig << " signature for target_link_libraries "
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"has already been used with the target \""
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<< this->Target->GetName() << "\". All uses of "
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"target_link_libraries with a target "
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<< modal << " be either "
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"all-keyword or all-plain.\n";
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this->Target->GetTllSignatureTraces(e,
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sig == cmTarget::KeywordTLLSignature
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? cmTarget::PlainTLLSignature
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: cmTarget::KeywordTLLSignature);
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this->Makefile->IssueMessage(messageType, e.str());
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if (messageType == cmake::FATAL_ERROR) {
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return false;
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}
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}
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}
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// Handle normal case first.
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if (this->CurrentProcessingState != ProcessingKeywordLinkInterface &&
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this->CurrentProcessingState != ProcessingPlainLinkInterface) {
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this->Makefile->AddLinkLibraryForTarget(this->Target->GetName(), lib, llt);
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if (this->CurrentProcessingState == ProcessingLinkLibraries) {
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this->Target->AppendProperty(
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"INTERFACE_LINK_LIBRARIES",
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this->Target->GetDebugGeneratorExpressions(lib, llt).c_str());
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return true;
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}
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if (this->CurrentProcessingState != ProcessingKeywordPublicInterface &&
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this->CurrentProcessingState != ProcessingPlainPublicInterface) {
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if (this->Target->GetType() == cmState::STATIC_LIBRARY) {
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std::string configLib =
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this->Target->GetDebugGeneratorExpressions(lib, llt);
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if (cmGeneratorExpression::IsValidTargetName(lib) ||
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cmGeneratorExpression::Find(lib) != std::string::npos) {
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configLib = "$<LINK_ONLY:" + configLib + ">";
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}
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this->Target->AppendProperty("INTERFACE_LINK_LIBRARIES",
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configLib.c_str());
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}
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// Not a 'public' or 'interface' library. Do not add to interface
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// property.
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return true;
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}
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}
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this->Target->AppendProperty(
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"INTERFACE_LINK_LIBRARIES",
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this->Target->GetDebugGeneratorExpressions(lib, llt).c_str());
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const cmPolicies::PolicyStatus policy22Status =
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this->Target->GetPolicyStatusCMP0022();
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if (policy22Status != cmPolicies::OLD &&
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policy22Status != cmPolicies::WARN) {
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return true;
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}
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if (this->Target->GetType() == cmState::INTERFACE_LIBRARY) {
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return true;
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}
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// Get the list of configurations considered to be DEBUG.
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std::vector<std::string> debugConfigs =
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this->Makefile->GetCMakeInstance()->GetDebugConfigs();
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std::string prop;
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// Include this library in the link interface for the target.
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if (llt == DEBUG_LibraryType || llt == GENERAL_LibraryType) {
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// Put in the DEBUG configuration interfaces.
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for (std::vector<std::string>::const_iterator i = debugConfigs.begin();
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i != debugConfigs.end(); ++i) {
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prop = "LINK_INTERFACE_LIBRARIES_";
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prop += *i;
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this->Target->AppendProperty(prop, lib.c_str());
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}
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}
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if (llt == OPTIMIZED_LibraryType || llt == GENERAL_LibraryType) {
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// Put in the non-DEBUG configuration interfaces.
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this->Target->AppendProperty("LINK_INTERFACE_LIBRARIES", lib.c_str());
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// Make sure the DEBUG configuration interfaces exist so that the
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// general one will not be used as a fall-back.
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for (std::vector<std::string>::const_iterator i = debugConfigs.begin();
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i != debugConfigs.end(); ++i) {
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prop = "LINK_INTERFACE_LIBRARIES_";
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prop += *i;
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if (!this->Target->GetProperty(prop)) {
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this->Target->SetProperty(prop, "");
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}
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}
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}
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return true;
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}
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