ENH: Added target property ENABLE_EXPORTS for executable targets. It enables the executables for linking by loadable modules that import symbols from the executable. This finishes the executable import library support mentioned in bug #4210.
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@ -26,6 +26,11 @@ SET(CMAKE_FIND_LIBRARY_SUFFIXES "-bcc.lib" ".lib")
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# Borland cannot handle + in the file name, so mangle object file name
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SET (CMAKE_MANGLE_OBJECT_FILE_NAMES "ON")
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# Create an import library for another target.
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SET(CMAKE_CXX_CREATE_IMPORT_LIBRARY
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"implib -c -w <TARGET_IMPLIB> <TARGET>"
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)
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# Create a C++ module library.
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SET(CMAKE_CXX_CREATE_SHARED_MODULE
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"<CMAKE_CXX_COMPILER> ${CMAKE_START_TEMP_FILE}-e<TARGET> -tWD <LINK_FLAGS> -tWR <LINK_LIBRARIES> <OBJECTS>${CMAKE_END_TEMP_FILE}"
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@ -33,9 +38,12 @@ SET(CMAKE_CXX_CREATE_SHARED_MODULE
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# Create a C++ shared library.
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# First create a module and then its import library.
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SET(CMAKE_CXX_CREATE_SHARED_LIBRARY ${CMAKE_CXX_CREATE_SHARED_MODULE}
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"implib -c -w <TARGET_IMPLIB> <TARGET>"
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)
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SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
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${CMAKE_CXX_CREATE_SHARED_MODULE}
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${CMAKE_CXX_CREATE_IMPORT_LIBRARY})
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# Create an import library for another target.
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SET(CMAKE_C_CREATE_IMPORT_LIBRARY ${CMAKE_CXX_CREATE_IMPORT_LIBRARY})
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# Create a C module library.
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SET(CMAKE_C_CREATE_SHARED_MODULE
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@ -44,9 +52,9 @@ SET(CMAKE_C_CREATE_SHARED_MODULE
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# Create a C shared library.
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# First create a module and then its import library.
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SET(CMAKE_C_CREATE_SHARED_LIBRARY ${CMAKE_C_CREATE_SHARED_MODULE}
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"implib -c -w <TARGET_IMPLIB> <TARGET>"
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)
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SET(CMAKE_C_CREATE_SHARED_LIBRARY
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${CMAKE_C_CREATE_SHARED_MODULE}
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${CMAKE_C_CREATE_IMPORT_LIBRARY})
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# create a C++ static library
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SET(CMAKE_CXX_CREATE_STATIC_LIBRARY "tlib ${CMAKE_START_TEMP_FILE}/p512 <LINK_FLAGS> /a <TARGET_QUOTED> <OBJECTS_QUOTED>${CMAKE_END_TEMP_FILE}")
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@ -25,6 +25,10 @@ SET (CMAKE_C_FLAGS_RELWITHDEBINFO_INIT "-br -bm -ot -dNDEBUG")
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SET (CMAKE_C_STANDARD_LIBRARIES_INIT "library clbrdll.lib library plbrdll.lib library kernel32.lib library user32.lib library gdi32.lib library winspool.lib library comdlg32.lib library advapi32.lib library shell32.lib library ole32.lib library oleaut32.lib library uuid.lib library odbc32.lib library odbccp32.lib")
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SET (CMAKE_CXX_STANDARD_LIBRARIES_INIT "${CMAKE_C_STANDARD_LIBRARIES_INIT}")
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SET(CMAKE_C_CREATE_IMPORT_LIBRARY
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"wlib -q -n -b <TARGET_IMPLIB> +<TARGET>")
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SET(CMAKE_CXX_CREATE_IMPORT_LIBRARY ${CMAKE_C_CREATE_IMPORT_LIBRARY})
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SET(CMAKE_C_LINK_EXECUTABLE
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"wlink ${CMAKE_START_TEMP_FILE} ${CMAKE_WLINK_QUIET} name <TARGET> option caseexact file {<OBJECTS>} <LINK_LIBRARIES> ${CMAKE_END_TEMP_FILE}")
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@ -39,9 +43,10 @@ SET(CMAKE_C_COMPILE_OBJECT
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"<CMAKE_C_COMPILER> ${CMAKE_START_TEMP_FILE} ${CMAKE_WCL_QUIET} <FLAGS> -dWIN32 -fo<OBJECT> -c -cc <SOURCE>${CMAKE_END_TEMP_FILE}")
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SET(CMAKE_CXX_CREATE_SHARED_MODULE
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"wlink ${CMAKE_START_TEMP_FILE} system nt_dll ${CMAKE_WLINK_QUIET} name <TARGET> option caseexact file {<OBJECTS>} <LINK_LIBRARIES>")
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SET(CMAKE_CXX_CREATE_SHARED_LIBRARY ${CMAKE_CXX_CREATE_SHARED_MODULE}
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"wlib -q -n -b <TARGET_IMPLIB> +<TARGET> ${CMAKE_END_TEMP_FILE}")
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"wlink ${CMAKE_START_TEMP_FILE} system nt_dll ${CMAKE_WLINK_QUIET} name <TARGET> option caseexact file {<OBJECTS>} <LINK_LIBRARIES> ${CMAKE_END_TEMP_FILE}")
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SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
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${CMAKE_CXX_CREATE_SHARED_MODULE}
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${CMAKE_CXX_CREATE_IMPORT_LIBRARY})
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# create a C shared library
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SET(CMAKE_C_CREATE_SHARED_LIBRARY ${CMAKE_CXX_CREATE_SHARED_LIBRARY})
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@ -1659,9 +1659,19 @@ void cmLocalGenerator
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{
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// Compute the proper name to use to link this library.
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cmTarget* tgt = this->GlobalGenerator->FindTarget(0, lib.c_str());
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if(tgt && (tgt->GetType() == cmTarget::STATIC_LIBRARY ||
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tgt->GetType() == cmTarget::SHARED_LIBRARY ||
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tgt->GetType() == cmTarget::MODULE_LIBRARY))
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bool impexe = (tgt &&
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tgt->GetType() == cmTarget::EXECUTABLE &&
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tgt->GetPropertyAsBool("ENABLE_EXPORTS"));
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if(impexe && !implib)
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{
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// Skip linking to executables on platforms with no import
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// libraries.
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continue;
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}
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else if(tgt && (tgt->GetType() == cmTarget::STATIC_LIBRARY ||
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tgt->GetType() == cmTarget::SHARED_LIBRARY ||
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tgt->GetType() == cmTarget::MODULE_LIBRARY ||
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impexe))
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{
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// This is a CMake target. Ask the target for its real name.
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// Pass the full path to the target file but purposely leave
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@ -944,13 +944,16 @@ void cmMakefile::AddLinkLibraryForTarget(const char *target,
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}
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// if it is not a static or shared library then you can not link to it
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if(!((tgt->GetType() == cmTarget::STATIC_LIBRARY) ||
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(tgt->GetType() == cmTarget::SHARED_LIBRARY)))
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(tgt->GetType() == cmTarget::SHARED_LIBRARY) ||
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(tgt->GetType() == cmTarget::EXECUTABLE &&
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tgt->GetPropertyAsBool("ENABLE_EXPORTS"))))
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{
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cmOStringStream e;
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e << "Attempt to add link target " << lib << " of type: "
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<< cmTarget::TargetTypeNames[static_cast<int>(tgt->GetType())]
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<< "\nto target " << target
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<< ". You can only link to STATIC or SHARED libraries.";
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<< ". One can only link to STATIC or SHARED libraries, or "
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<< "to executables with the ENABLE_EXPORTS property set.";
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// in older versions of cmake linking to modules was allowed
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if( tgt->GetType() == cmTarget::MODULE_LIBRARY )
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{
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@ -347,6 +347,19 @@ void cmMakefileExecutableTargetGenerator::WriteExecutableRule(bool relink)
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std::string linkRule =
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this->Makefile->GetRequiredDefinition(linkRuleVar.c_str());
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cmSystemTools::ExpandListArgument(linkRule, commands1);
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if(this->Target->GetPropertyAsBool("ENABLE_EXPORTS"))
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{
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// If a separate rule for creating an import library is specified
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// add it now.
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std::string implibRuleVar = "CMAKE_";
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implibRuleVar += linkLanguage;
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implibRuleVar += "_CREATE_IMPORT_LIBRARY";
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if(const char* rule =
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this->Makefile->GetDefinition(implibRuleVar.c_str()))
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{
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cmSystemTools::ExpandListArgument(rule, commands1);
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}
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}
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this->LocalGenerator->CreateCDCommand
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(commands1,
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this->Makefile->GetStartOutputDirectory(),
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@ -258,6 +258,23 @@ void cmTarget::DefineProperties(cmake *cm)
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"in contrast to a console application for example. This changes "
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"how the executable will be linked.");
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cm->DefineProperty
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("ENABLE_EXPORTS", cmProperty::TARGET,
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"Specify whether an executable exports symbols for loadable modules.",
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"Normally an executable does not export any symbols because it is "
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"the final program. It is possible for an executable to export "
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"symbols to be used by loadable modules. When this property is "
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"set to true CMake will allow other targets to \"link\" to the "
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"executable with the TARGET_LINK_LIBRARIES command. "
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"On all platforms a target-level dependency on the executable is "
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"created for targets that link to it. "
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"For non-DLL platforms the link rule is simply ignored since "
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"the dynamic loader will automatically bind symbols when the "
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"module is loaded. "
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"For DLL platforms an import library will be created for the "
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"exported symbols and then used for linking. "
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"All Windows-based systems including Cygwin are DLL platforms.");
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cm->DefineProperty
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("OBJECT_FILES", cmProperty::TARGET,
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"Used to get the resulting list of object files that make up a "
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