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Diffstat (limited to 'Source/cmTargetLinkLibrariesCommand.cxx')
| -rw-r--r-- | Source/cmTargetLinkLibrariesCommand.cxx | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/Source/cmTargetLinkLibrariesCommand.cxx b/Source/cmTargetLinkLibrariesCommand.cxx new file mode 100644 index 0000000..b57b921 --- /dev/null +++ b/Source/cmTargetLinkLibrariesCommand.cxx @@ -0,0 +1,502 @@ +/*============================================================================ + CMake - Cross Platform Makefile Generator + Copyright 2000-2009 Kitware, Inc., Insight Software Consortium + + Distributed under the OSI-approved BSD License (the "License"); + see accompanying file Copyright.txt for details. + + This software is distributed WITHOUT ANY WARRANTY; without even the + implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the License for more information. +============================================================================*/ +#include "cmTargetLinkLibrariesCommand.h" + +#include "cmGeneratorExpression.h" + +const char* cmTargetLinkLibrariesCommand::LinkLibraryTypeNames[3] = +{ + "general", + "debug", + "optimized" +}; + +// cmTargetLinkLibrariesCommand +bool cmTargetLinkLibrariesCommand +::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &) +{ + // must have one argument + if(args.size() < 1) + { + this->SetError("called with incorrect number of arguments"); + return false; + } + + if (this->Makefile->IsAlias(args[0])) + { + this->SetError("can not be used on an ALIAS target."); + return false; + } + // Lookup the target for which libraries are specified. + this->Target = + this->Makefile->GetCMakeInstance() + ->GetGlobalGenerator()->FindTarget(args[0]); + if(!this->Target) + { + cmake::MessageType t = cmake::FATAL_ERROR; // fail by default + std::ostringstream e; + e << "Cannot specify link libraries for target \"" << args[0] << "\" " + << "which is not built by this project."; + // The bad target is the only argument. Check how policy CMP0016 is set, + // and accept, warn or fail respectively: + if (args.size() < 2) + { + switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0016)) + { + case cmPolicies::WARN: + t = cmake::AUTHOR_WARNING; + // Print the warning. + e << "\n" + << "CMake does not support this but it used to work accidentally " + << "and is being allowed for compatibility." + << "\n" << cmPolicies::GetPolicyWarning(cmPolicies::CMP0016); + break; + case cmPolicies::OLD: // OLD behavior does not warn. + t = cmake::MESSAGE; + break; + case cmPolicies::REQUIRED_IF_USED: + case cmPolicies::REQUIRED_ALWAYS: + e << "\n" << cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0016); + break; + case cmPolicies::NEW: // NEW behavior prints the error. + break; + } + } + + // now actually print the message + switch(t) + { + case cmake::AUTHOR_WARNING: + this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, e.str()); + break; + case cmake::FATAL_ERROR: + this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str()); + cmSystemTools::SetFatalErrorOccured(); + break; + default: + break; + } + return true; + } + + if(this->Target->GetType() == cmTarget::OBJECT_LIBRARY) + { + std::ostringstream e; + e << "Object library target \"" << args[0] << "\" " + << "may not link to anything."; + this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str()); + cmSystemTools::SetFatalErrorOccured(); + return true; + } + + if (this->Target->GetType() == cmTarget::UTILITY) + { + std::ostringstream e; + const char *modal = 0; + cmake::MessageType messageType = cmake::AUTHOR_WARNING; + switch(this->Makefile->GetPolicyStatus(cmPolicies::CMP0039)) + { + case cmPolicies::WARN: + e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0039) << "\n"; + modal = "should"; + case cmPolicies::OLD: + break; + case cmPolicies::REQUIRED_ALWAYS: + case cmPolicies::REQUIRED_IF_USED: + case cmPolicies::NEW: + modal = "must"; + messageType = cmake::FATAL_ERROR; + } + if (modal) + { + e << + "Utility target \"" << this->Target->GetName() << "\" " << modal + << " not be used as the target of a target_link_libraries call."; + this->Makefile->IssueMessage(messageType, e.str()); + if(messageType == cmake::FATAL_ERROR) + { + return false; + } + } + } + + // but we might not have any libs after variable expansion + if(args.size() < 2) + { + return true; + } + + // Keep track of link configuration specifiers. + cmTarget::LinkLibraryType llt = cmTarget::GENERAL; + bool haveLLT = false; + + // Start with primary linking and switch to link interface + // specification if the keyword is encountered as the first argument. + this->CurrentProcessingState = ProcessingLinkLibraries; + + // add libraries, note that there is an optional prefix + // of debug and optimized that can be used + for(unsigned int i=1; i < args.size(); ++i) + { + if(args[i] == "LINK_INTERFACE_LIBRARIES") + { + this->CurrentProcessingState = ProcessingPlainLinkInterface; + if(i != 1) + { + this->Makefile->IssueMessage( + cmake::FATAL_ERROR, + "The LINK_INTERFACE_LIBRARIES option must appear as the second " + "argument, just after the target name." + ); + return true; + } + } + else if(args[i] == "INTERFACE") + { + if(i != 1 + && this->CurrentProcessingState != ProcessingKeywordPrivateInterface + && this->CurrentProcessingState != ProcessingKeywordPublicInterface + && this->CurrentProcessingState != ProcessingKeywordLinkInterface) + { + this->Makefile->IssueMessage( + cmake::FATAL_ERROR, + "The INTERFACE option must appear as the second " + "argument, just after the target name." + ); + return true; + } + this->CurrentProcessingState = ProcessingKeywordLinkInterface; + } + else if(args[i] == "LINK_PUBLIC") + { + if(i != 1 + && this->CurrentProcessingState != ProcessingPlainPrivateInterface + && this->CurrentProcessingState != ProcessingPlainPublicInterface) + { + this->Makefile->IssueMessage( + cmake::FATAL_ERROR, + "The LINK_PUBLIC or LINK_PRIVATE option must appear as the second " + "argument, just after the target name." + ); + return true; + } + this->CurrentProcessingState = ProcessingPlainPublicInterface; + } + else if(args[i] == "PUBLIC") + { + if(i != 1 + && this->CurrentProcessingState != ProcessingKeywordPrivateInterface + && this->CurrentProcessingState != ProcessingKeywordPublicInterface + && this->CurrentProcessingState != ProcessingKeywordLinkInterface) + { + this->Makefile->IssueMessage( + cmake::FATAL_ERROR, + "The PUBLIC or PRIVATE option must appear as the second " + "argument, just after the target name." + ); + return true; + } + this->CurrentProcessingState = ProcessingKeywordPublicInterface; + } + else if(args[i] == "LINK_PRIVATE") + { + if(i != 1 + && this->CurrentProcessingState != ProcessingPlainPublicInterface + && this->CurrentProcessingState != ProcessingPlainPrivateInterface) + { + this->Makefile->IssueMessage( + cmake::FATAL_ERROR, + "The LINK_PUBLIC or LINK_PRIVATE option must appear as the second " + "argument, just after the target name." + ); + return true; + } + this->CurrentProcessingState = ProcessingPlainPrivateInterface; + } + else if(args[i] == "PRIVATE") + { + if(i != 1 + && this->CurrentProcessingState != ProcessingKeywordPrivateInterface + && this->CurrentProcessingState != ProcessingKeywordPublicInterface + && this->CurrentProcessingState != ProcessingKeywordLinkInterface) + { + this->Makefile->IssueMessage( + cmake::FATAL_ERROR, + "The PUBLIC or PRIVATE option must appear as the second " + "argument, just after the target name." + ); + return true; + } + this->CurrentProcessingState = ProcessingKeywordPrivateInterface; + } + else if(args[i] == "debug") + { + if(haveLLT) + { + this->LinkLibraryTypeSpecifierWarning(llt, cmTarget::DEBUG); + } + llt = cmTarget::DEBUG; + haveLLT = true; + } + else if(args[i] == "optimized") + { + if(haveLLT) + { + this->LinkLibraryTypeSpecifierWarning(llt, cmTarget::OPTIMIZED); + } + llt = cmTarget::OPTIMIZED; + haveLLT = true; + } + else if(args[i] == "general") + { + if(haveLLT) + { + this->LinkLibraryTypeSpecifierWarning(llt, cmTarget::GENERAL); + } + llt = cmTarget::GENERAL; + haveLLT = true; + } + else if(haveLLT) + { + // The link type was specified by the previous argument. + haveLLT = false; + if (!this->HandleLibrary(args[i], llt)) + { + return false; + } + } + else + { + // Lookup old-style cache entry if type is unspecified. So if you + // do a target_link_libraries(foo optimized bar) it will stay optimized + // and not use the lookup. As there maybe the case where someone has + // specifed that a library is both debug and optimized. (this check is + // only there for backwards compatibility when mixing projects built + // with old versions of CMake and new) + llt = cmTarget::GENERAL; + std::string linkType = args[0]; + linkType += "_LINK_TYPE"; + const char* linkTypeString = + this->Makefile->GetDefinition( linkType ); + if(linkTypeString) + { + if(strcmp(linkTypeString, "debug") == 0) + { + llt = cmTarget::DEBUG; + } + if(strcmp(linkTypeString, "optimized") == 0) + { + llt = cmTarget::OPTIMIZED; + } + } + if (!this->HandleLibrary(args[i], llt)) + { + return false; + } + } + } + + // Make sure the last argument was not a library type specifier. + if(haveLLT) + { + std::ostringstream e; + e << "The \"" << this->LinkLibraryTypeNames[llt] + << "\" argument must be followed by a library."; + this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str()); + cmSystemTools::SetFatalErrorOccured(); + } + + const cmPolicies::PolicyStatus policy22Status + = this->Target->GetPolicyStatusCMP0022(); + + // If any of the LINK_ options were given, make sure the + // LINK_INTERFACE_LIBRARIES target property exists. + // Use of any of the new keywords implies awareness of + // this property. And if no libraries are named, it should + // result in an empty link interface. + if((policy22Status == cmPolicies::OLD || + policy22Status == cmPolicies::WARN) && + this->CurrentProcessingState != ProcessingLinkLibraries && + !this->Target->GetProperty("LINK_INTERFACE_LIBRARIES")) + { + this->Target->SetProperty("LINK_INTERFACE_LIBRARIES", ""); + } + + return true; +} + +//---------------------------------------------------------------------------- +void +cmTargetLinkLibrariesCommand +::LinkLibraryTypeSpecifierWarning(int left, int right) +{ + std::ostringstream w; + w << "Link library type specifier \"" + << this->LinkLibraryTypeNames[left] << "\" is followed by specifier \"" + << this->LinkLibraryTypeNames[right] << "\" instead of a library name. " + << "The first specifier will be ignored."; + this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, w.str()); +} + +//---------------------------------------------------------------------------- +bool +cmTargetLinkLibrariesCommand::HandleLibrary(const std::string& lib, + cmTarget::LinkLibraryType llt) +{ + if(this->Target->GetType() == cmTarget::INTERFACE_LIBRARY + && this->CurrentProcessingState != ProcessingKeywordLinkInterface) + { + this->Makefile->IssueMessage(cmake::FATAL_ERROR, + "INTERFACE library can only be used with the INTERFACE keyword of " + "target_link_libraries"); + return false; + } + + cmTarget::TLLSignature sig = + (this->CurrentProcessingState == ProcessingPlainPrivateInterface + || this->CurrentProcessingState == ProcessingPlainPublicInterface + || this->CurrentProcessingState == ProcessingKeywordPrivateInterface + || this->CurrentProcessingState == ProcessingKeywordPublicInterface + || this->CurrentProcessingState == ProcessingKeywordLinkInterface) + ? cmTarget::KeywordTLLSignature : cmTarget::PlainTLLSignature; + if (!this->Target->PushTLLCommandTrace( + sig, this->Makefile->GetExecutionContext())) + { + std::ostringstream e; + const char *modal = 0; + cmake::MessageType messageType = cmake::AUTHOR_WARNING; + switch(this->Makefile->GetPolicyStatus(cmPolicies::CMP0023)) + { + case cmPolicies::WARN: + e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0023) << "\n"; + modal = "should"; + case cmPolicies::OLD: + break; + case cmPolicies::REQUIRED_ALWAYS: + case cmPolicies::REQUIRED_IF_USED: + case cmPolicies::NEW: + modal = "must"; + messageType = cmake::FATAL_ERROR; + } + + if(modal) + { + // If the sig is a keyword form and there is a conflict, the existing + // form must be the plain form. + const char *existingSig + = (sig == cmTarget::KeywordTLLSignature ? "plain" + : "keyword"); + e << + "The " << existingSig << " signature for target_link_libraries " + "has already been used with the target \"" + << this->Target->GetName() << "\". All uses of " + "target_link_libraries with a target " << modal << " be either " + "all-keyword or all-plain.\n"; + this->Target->GetTllSignatureTraces(e, + sig == cmTarget::KeywordTLLSignature + ? cmTarget::PlainTLLSignature + : cmTarget::KeywordTLLSignature); + this->Makefile->IssueMessage(messageType, e.str()); + if(messageType == cmake::FATAL_ERROR) + { + return false; + } + } + } + + // Handle normal case first. + if(this->CurrentProcessingState != ProcessingKeywordLinkInterface + && this->CurrentProcessingState != ProcessingPlainLinkInterface) + { + this->Makefile + ->AddLinkLibraryForTarget(this->Target->GetName(), lib, llt); + if(this->CurrentProcessingState == ProcessingLinkLibraries) + { + this->Target->AppendProperty("INTERFACE_LINK_LIBRARIES", + this->Target->GetDebugGeneratorExpressions(lib, llt).c_str()); + return true; + } + else if(this->CurrentProcessingState != ProcessingKeywordPublicInterface + && this->CurrentProcessingState != ProcessingPlainPublicInterface) + { + if (this->Target->GetType() == cmTarget::STATIC_LIBRARY) + { + std::string configLib = this->Target + ->GetDebugGeneratorExpressions(lib, llt); + if (cmGeneratorExpression::IsValidTargetName(lib) + || cmGeneratorExpression::Find(lib) != std::string::npos) + { + configLib = "$<LINK_ONLY:" + configLib + ">"; + } + this->Target->AppendProperty("INTERFACE_LINK_LIBRARIES", + configLib.c_str()); + } + // Not a 'public' or 'interface' library. Do not add to interface + // property. + return true; + } + } + + this->Target->AppendProperty("INTERFACE_LINK_LIBRARIES", + this->Target->GetDebugGeneratorExpressions(lib, llt).c_str()); + + const cmPolicies::PolicyStatus policy22Status + = this->Target->GetPolicyStatusCMP0022(); + + if (policy22Status != cmPolicies::OLD + && policy22Status != cmPolicies::WARN) + { + return true; + } + + if (this->Target->GetType() == cmTarget::INTERFACE_LIBRARY) + { + return true; + } + + // Get the list of configurations considered to be DEBUG. + std::vector<std::string> debugConfigs = + this->Makefile->GetCMakeInstance()->GetDebugConfigs(); + std::string prop; + + // Include this library in the link interface for the target. + if(llt == cmTarget::DEBUG || llt == cmTarget::GENERAL) + { + // Put in the DEBUG configuration interfaces. + for(std::vector<std::string>::const_iterator i = debugConfigs.begin(); + i != debugConfigs.end(); ++i) + { + prop = "LINK_INTERFACE_LIBRARIES_"; + prop += *i; + this->Target->AppendProperty(prop, lib.c_str()); + } + } + if(llt == cmTarget::OPTIMIZED || llt == cmTarget::GENERAL) + { + // Put in the non-DEBUG configuration interfaces. + this->Target->AppendProperty("LINK_INTERFACE_LIBRARIES", lib.c_str()); + + // Make sure the DEBUG configuration interfaces exist so that the + // general one will not be used as a fall-back. + for(std::vector<std::string>::const_iterator i = debugConfigs.begin(); + i != debugConfigs.end(); ++i) + { + prop = "LINK_INTERFACE_LIBRARIES_"; + prop += *i; + if(!this->Target->GetProperty(prop)) + { + this->Target->SetProperty(prop, ""); + } + } + } + return true; +} |