484 lines
16 KiB
C++
484 lines
16 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2011 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#include "cmCoreTryCompile.h"
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#include "cmake.h"
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#include "cmCacheManager.h"
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#include "cmGlobalGenerator.h"
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#include <cmsys/Directory.hxx>
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int cmCoreTryCompile::TryCompileCode(std::vector<std::string> const& argv)
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{
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this->BinaryDirectory = argv[1].c_str();
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this->OutputFile = "";
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// which signature were we called with ?
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this->SrcFileSignature = false;
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unsigned int i;
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const char* sourceDirectory = argv[2].c_str();
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const char* projectName = 0;
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const char* targetName = 0;
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char targetNameBuf[64];
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int extraArgs = 0;
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// look for CMAKE_FLAGS and store them
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std::vector<std::string> cmakeFlags;
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for (i = 3; i < argv.size(); ++i)
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{
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if (argv[i] == "CMAKE_FLAGS")
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{
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// CMAKE_FLAGS is the first argument because we need an argv[0] that
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// is not used, so it matches regular command line parsing which has
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// the program name as arg 0
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for (; i < argv.size() && argv[i] != "COMPILE_DEFINITIONS" &&
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argv[i] != "OUTPUT_VARIABLE";
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++i)
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{
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extraArgs++;
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cmakeFlags.push_back(argv[i]);
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}
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break;
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}
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}
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// look for OUTPUT_VARIABLE and store them
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std::string outputVariable;
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for (i = 3; i < argv.size(); ++i)
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{
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if (argv[i] == "OUTPUT_VARIABLE")
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{
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if ( argv.size() <= (i+1) )
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{
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this->Makefile->IssueMessage(cmake::FATAL_ERROR,
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"OUTPUT_VARIABLE specified but there is no variable");
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return -1;
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}
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extraArgs += 2;
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outputVariable = argv[i+1];
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break;
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}
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}
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// look for COMPILE_DEFINITIONS and store them
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std::vector<std::string> compileFlags;
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for (i = 3; i < argv.size(); ++i)
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{
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if (argv[i] == "COMPILE_DEFINITIONS")
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{
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extraArgs++;
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for (i = i + 1; i < argv.size() && argv[i] != "CMAKE_FLAGS" &&
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argv[i] != "OUTPUT_VARIABLE";
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++i)
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{
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extraArgs++;
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compileFlags.push_back(argv[i]);
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}
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break;
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}
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}
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// look for COPY_FILE
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std::string copyFile;
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for (i = 3; i < argv.size(); ++i)
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{
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if (argv[i] == "COPY_FILE")
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{
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if ( argv.size() <= (i+1) )
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{
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this->Makefile->IssueMessage(cmake::FATAL_ERROR,
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"COPY_FILE specified but there is no variable");
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return -1;
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}
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extraArgs += 2;
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copyFile = argv[i+1];
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break;
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}
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}
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// do we have a srcfile signature
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if (argv.size() - extraArgs == 3)
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{
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this->SrcFileSignature = true;
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}
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// compute the binary dir when TRY_COMPILE is called with a src file
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// signature
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if (this->SrcFileSignature)
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{
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this->BinaryDirectory += cmake::GetCMakeFilesDirectory();
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this->BinaryDirectory += "/CMakeTmp";
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}
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else
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{
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// only valid for srcfile signatures
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if (compileFlags.size())
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{
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this->Makefile->IssueMessage(cmake::FATAL_ERROR,
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"COMPILE_FLAGS specified on a srcdir type TRY_COMPILE");
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return -1;
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}
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if (copyFile.size())
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{
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this->Makefile->IssueMessage(cmake::FATAL_ERROR,
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"COPY_FILE specified on a srcdir type TRY_COMPILE");
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return -1;
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}
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}
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// make sure the binary directory exists
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cmSystemTools::MakeDirectory(this->BinaryDirectory.c_str());
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// do not allow recursive try Compiles
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if (this->BinaryDirectory == this->Makefile->GetHomeOutputDirectory())
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{
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cmOStringStream e;
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e << "Attempt at a recursive or nested TRY_COMPILE in directory\n"
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<< " " << this->BinaryDirectory << "\n";
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this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
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return -1;
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}
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std::string outFileName = this->BinaryDirectory + "/CMakeLists.txt";
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// which signature are we using? If we are using var srcfile bindir
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if (this->SrcFileSignature)
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{
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// remove any CMakeCache.txt files so we will have a clean test
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std::string ccFile = this->BinaryDirectory + "/CMakeCache.txt";
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cmSystemTools::RemoveFile(ccFile.c_str());
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// we need to create a directory and CMakeLists file etc...
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// first create the directories
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sourceDirectory = this->BinaryDirectory.c_str();
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// now create a CMakeLists.txt file in that directory
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FILE *fout = fopen(outFileName.c_str(),"w");
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if (!fout)
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{
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cmOStringStream e;
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e << "Failed to open\n"
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<< " " << outFileName.c_str() << "\n"
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<< cmSystemTools::GetLastSystemError();
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this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
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return -1;
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}
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std::string source = argv[2];
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std::string ext = cmSystemTools::GetFilenameLastExtension(source);
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const char* lang =(this->Makefile->GetCMakeInstance()->GetGlobalGenerator()
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->GetLanguageFromExtension(ext.c_str()));
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const char* def = this->Makefile->GetDefinition("CMAKE_MODULE_PATH");
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fprintf(fout, "cmake_minimum_required(VERSION %u.%u.%u.%u)\n",
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cmVersion::GetMajorVersion(), cmVersion::GetMinorVersion(),
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cmVersion::GetPatchVersion(), cmVersion::GetTweakVersion());
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if(def)
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{
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fprintf(fout, "SET(CMAKE_MODULE_PATH %s)\n", def);
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}
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const char* rulesOverrideBase = "CMAKE_USER_MAKE_RULES_OVERRIDE";
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std::string rulesOverrideLang =
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rulesOverrideBase + (lang ? std::string("_") + lang : std::string(""));
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if(const char* rulesOverridePath =
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this->Makefile->GetDefinition(rulesOverrideLang.c_str()))
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{
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fprintf(fout, "SET(%s \"%s\")\n",
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rulesOverrideLang.c_str(), rulesOverridePath);
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}
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else if(const char* rulesOverridePath2 =
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this->Makefile->GetDefinition(rulesOverrideBase))
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{
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fprintf(fout, "SET(%s \"%s\")\n",
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rulesOverrideBase, rulesOverridePath2);
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}
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if(lang)
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{
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fprintf(fout, "PROJECT(CMAKE_TRY_COMPILE %s)\n", lang);
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}
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else
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{
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fclose(fout);
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cmOStringStream err;
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err << "Unknown extension \"" << ext << "\" for file\n"
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<< " " << source << "\n"
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<< "try_compile() works only for enabled languages. "
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<< "Currently these are:\n ";
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std::vector<std::string> langs;
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this->Makefile->GetCMakeInstance()->GetGlobalGenerator()->
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GetEnabledLanguages(langs);
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for(std::vector<std::string>::iterator l = langs.begin();
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l != langs.end(); ++l)
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{
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err << " " << *l;
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}
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err << "\nSee project() command to enable other languages.";
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this->Makefile->IssueMessage(cmake::FATAL_ERROR, err.str());
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return -1;
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}
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std::string langFlags = "CMAKE_";
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langFlags += lang;
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langFlags += "_FLAGS";
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fprintf(fout, "SET(CMAKE_VERBOSE_MAKEFILE 1)\n");
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fprintf(fout, "SET(CMAKE_%s_FLAGS \"", lang);
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const char* flags = this->Makefile->GetDefinition(langFlags.c_str());
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if(flags)
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{
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fprintf(fout, " %s ", flags);
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}
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fprintf(fout, " ${COMPILE_DEFINITIONS}\")\n");
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fprintf(fout, "INCLUDE_DIRECTORIES(${INCLUDE_DIRECTORIES})\n");
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fprintf(fout, "SET(CMAKE_SUPPRESS_REGENERATION 1)\n");
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fprintf(fout, "LINK_DIRECTORIES(${LINK_DIRECTORIES})\n");
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// handle any compile flags we need to pass on
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if (compileFlags.size())
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{
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fprintf(fout, "ADD_DEFINITIONS( ");
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for (i = 0; i < compileFlags.size(); ++i)
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{
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fprintf(fout,"%s ",compileFlags[i].c_str());
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}
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fprintf(fout, ")\n");
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}
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/* for the TRY_COMPILEs we want to be able to specify the architecture.
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So the user can set CMAKE_OSX_ARCHITECTURE to i386;ppc and then set
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CMAKE_TRY_COMPILE_OSX_ARCHITECTURE first to i386 and then to ppc to
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have the tests run for each specific architecture. Since
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cmLocalGenerator doesn't allow building for "the other"
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architecture only via CMAKE_OSX_ARCHITECTURES.
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*/
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if(this->Makefile->GetDefinition("CMAKE_TRY_COMPILE_OSX_ARCHITECTURES")!=0)
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{
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std::string flag="-DCMAKE_OSX_ARCHITECTURES=";
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flag += this->Makefile->GetSafeDefinition(
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"CMAKE_TRY_COMPILE_OSX_ARCHITECTURES");
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cmakeFlags.push_back(flag);
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}
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else if (this->Makefile->GetDefinition("CMAKE_OSX_ARCHITECTURES")!=0)
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{
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std::string flag="-DCMAKE_OSX_ARCHITECTURES=";
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flag += this->Makefile->GetSafeDefinition("CMAKE_OSX_ARCHITECTURES");
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cmakeFlags.push_back(flag);
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}
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/* on APPLE also pass CMAKE_OSX_SYSROOT to the try_compile */
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if(this->Makefile->GetDefinition("CMAKE_OSX_SYSROOT")!=0)
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{
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std::string flag="-DCMAKE_OSX_SYSROOT=";
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flag += this->Makefile->GetSafeDefinition("CMAKE_OSX_SYSROOT");
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cmakeFlags.push_back(flag);
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}
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/* on APPLE also pass CMAKE_OSX_DEPLOYMENT_TARGET to the try_compile */
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if(this->Makefile->GetDefinition("CMAKE_OSX_DEPLOYMENT_TARGET")!=0)
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{
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std::string flag="-DCMAKE_OSX_DEPLOYMENT_TARGET=";
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flag += this->Makefile->GetSafeDefinition("CMAKE_OSX_DEPLOYMENT_TARGET");
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cmakeFlags.push_back(flag);
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}
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if(this->Makefile->GetDefinition("CMAKE_POSITION_INDEPENDENT_CODE")!=0)
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{
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fprintf(fout, "SET(CMAKE_POSITION_INDEPENDENT_CODE \"ON\")\n");
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}
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/* Use a random file name to avoid rapid creation and deletion
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of the same executable name (some filesystems fail on that). */
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sprintf(targetNameBuf, "cmTryCompileExec%u",
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cmSystemTools::RandomSeed());
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targetName = targetNameBuf;
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/* Put the executable at a known location (for COPY_FILE). */
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fprintf(fout, "SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY \"%s\")\n",
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this->BinaryDirectory.c_str());
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/* Create the actual executable. */
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fprintf(fout, "ADD_EXECUTABLE(%s \"%s\")\n", targetName, source.c_str());
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fprintf(fout, "TARGET_LINK_LIBRARIES(%s ${LINK_LIBRARIES})\n",targetName);
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fclose(fout);
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projectName = "CMAKE_TRY_COMPILE";
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// if the source is not in CMakeTmp
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if(source.find("CMakeTmp") == source.npos)
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{
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this->Makefile->AddCMakeDependFile(source.c_str());
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}
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}
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// else the srcdir bindir project target signature
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else
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{
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projectName = argv[3].c_str();
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if (argv.size() - extraArgs == 5)
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{
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targetName = argv[4].c_str();
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}
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}
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bool erroroc = cmSystemTools::GetErrorOccuredFlag();
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cmSystemTools::ResetErrorOccuredFlag();
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std::string output;
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// actually do the try compile now that everything is setup
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int res = this->Makefile->TryCompile(sourceDirectory,
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this->BinaryDirectory.c_str(),
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projectName,
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targetName,
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this->SrcFileSignature,
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&cmakeFlags,
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&output);
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if ( erroroc )
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{
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cmSystemTools::SetErrorOccured();
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}
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// set the result var to the return value to indicate success or failure
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this->Makefile->AddCacheDefinition(argv[0].c_str(),
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(res == 0 ? "TRUE" : "FALSE"),
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"Result of TRY_COMPILE",
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cmCacheManager::INTERNAL);
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if ( outputVariable.size() > 0 )
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{
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this->Makefile->AddDefinition(outputVariable.c_str(), output.c_str());
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}
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if (this->SrcFileSignature)
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{
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this->FindOutputFile(targetName);
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if ((res==0) && (copyFile.size()))
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{
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if(this->OutputFile.empty() ||
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!cmSystemTools::CopyFileAlways(this->OutputFile.c_str(),
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copyFile.c_str()))
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{
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cmOStringStream emsg;
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emsg << "Cannot copy output executable\n"
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<< " '" << this->OutputFile.c_str() << "'\n"
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<< "to destination specified by COPY_FILE:\n"
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<< " '" << copyFile.c_str() << "'\n";
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if(!this->FindErrorMessage.empty())
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{
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emsg << this->FindErrorMessage.c_str();
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}
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this->Makefile->IssueMessage(cmake::FATAL_ERROR, emsg.str());
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return -1;
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}
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}
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}
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return res;
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}
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void cmCoreTryCompile::CleanupFiles(const char* binDir)
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{
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if ( !binDir )
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{
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return;
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}
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std::string bdir = binDir;
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if(bdir.find("CMakeTmp") == std::string::npos)
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{
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cmSystemTools::Error(
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"TRY_COMPILE attempt to remove -rf directory that does not contain "
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"CMakeTmp:", binDir);
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return;
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}
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cmsys::Directory dir;
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dir.Load(binDir);
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size_t fileNum;
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std::set<cmStdString> deletedFiles;
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for (fileNum = 0; fileNum < dir.GetNumberOfFiles(); ++fileNum)
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{
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if (strcmp(dir.GetFile(static_cast<unsigned long>(fileNum)),".") &&
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strcmp(dir.GetFile(static_cast<unsigned long>(fileNum)),".."))
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{
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if(deletedFiles.find( dir.GetFile(static_cast<unsigned long>(fileNum)))
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== deletedFiles.end())
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{
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deletedFiles.insert(dir.GetFile(static_cast<unsigned long>(fileNum)));
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std::string fullPath = binDir;
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fullPath += "/";
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fullPath += dir.GetFile(static_cast<unsigned long>(fileNum));
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if(cmSystemTools::FileIsDirectory(fullPath.c_str()))
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{
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this->CleanupFiles(fullPath.c_str());
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cmSystemTools::RemoveADirectory(fullPath.c_str());
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}
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else
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{
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// Sometimes anti-virus software hangs on to new files so we
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// cannot delete them immediately. Try a few times.
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int tries = 5;
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while(!cmSystemTools::RemoveFile(fullPath.c_str()) &&
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--tries && cmSystemTools::FileExists(fullPath.c_str()))
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{
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cmSystemTools::Delay(500);
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}
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if(tries == 0)
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{
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std::string m = "Remove failed on file: " + fullPath;
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cmSystemTools::ReportLastSystemError(m.c_str());
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}
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}
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}
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}
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}
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}
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void cmCoreTryCompile::FindOutputFile(const char* targetName)
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{
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this->FindErrorMessage = "";
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this->OutputFile = "";
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std::string tmpOutputFile = "/";
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tmpOutputFile += targetName;
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tmpOutputFile +=this->Makefile->GetSafeDefinition("CMAKE_EXECUTABLE_SUFFIX");
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// a list of directories where to search for the compilation result
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// at first directly in the binary dir
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std::vector<std::string> searchDirs;
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searchDirs.push_back("");
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const char* config = this->Makefile->GetDefinition(
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"CMAKE_TRY_COMPILE_CONFIGURATION");
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// if a config was specified try that first
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if (config && config[0])
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{
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std::string tmp = "/";
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tmp += config;
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searchDirs.push_back(tmp);
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}
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searchDirs.push_back("/Debug");
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searchDirs.push_back("/Development");
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for(std::vector<std::string>::const_iterator it = searchDirs.begin();
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it != searchDirs.end();
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++it)
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{
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std::string command = this->BinaryDirectory;
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command += *it;
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command += tmpOutputFile;
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if(cmSystemTools::FileExists(command.c_str()))
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{
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tmpOutputFile = cmSystemTools::CollapseFullPath(command.c_str());
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this->OutputFile = tmpOutputFile;
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return;
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}
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}
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cmOStringStream emsg;
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emsg << "Unable to find the executable at any of:\n";
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for (unsigned int i = 0; i < searchDirs.size(); ++i)
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{
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emsg << " " << this->BinaryDirectory << searchDirs[i]
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<< tmpOutputFile << "\n";
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}
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this->FindErrorMessage = emsg.str();
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return;
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}
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