333 lines
10 KiB
C++
333 lines
10 KiB
C++
/*=========================================================================
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Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
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Language: C++
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Date: $Date$
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Version: $Revision$
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Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
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See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
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#include "cmTryRunCommand.h"
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#include "cmCacheManager.h"
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#include "cmTryCompileCommand.h"
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// cmTryRunCommand
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bool cmTryRunCommand::InitialPass(std::vector<std::string> const& argv)
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{
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if(argv.size() < 4)
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{
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return false;
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}
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// build an arg list for TryCompile and extract the runArgs
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std::vector<std::string> tryCompile;
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this->CompileResultVariable = "";
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this->RunResultVariable = "";
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this->OutputVariable = "";
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this->RunOutputVariable = "";
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this->CompileOutputVariable = "";
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std::string runArgs;
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unsigned int i;
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for (i = 1; i < argv.size(); ++i)
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{
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if (argv[i] == "ARGS")
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{
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++i;
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while (i < argv.size() && argv[i] != "COMPILE_DEFINITIONS" &&
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argv[i] != "CMAKE_FLAGS")
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{
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runArgs += " ";
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runArgs += argv[i];
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++i;
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}
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if (i < argv.size())
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{
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tryCompile.push_back(argv[i]);
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}
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}
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else
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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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cmSystemTools::Error(
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"OUTPUT_VARIABLE specified but there is no variable");
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return false;
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}
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i++;
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this->OutputVariable = argv[i];
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}
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else if (argv[i] == "RUN_OUTPUT_VARIABLE")
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{
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if (argv.size() <= (i + 1))
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{
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cmSystemTools::Error(
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"RUN_OUTPUT_VARIABLE specified but there is no variable");
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return false;
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}
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i++;
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this->RunOutputVariable = argv[i];
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}
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else if (argv[i] == "COMPILE_OUTPUT_VARIABLE")
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{
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if (argv.size() <= (i + 1))
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{
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cmSystemTools::Error(
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"COMPILE_OUTPUT_VARIABLE specified but there is no variable");
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return false;
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}
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i++;
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this->CompileOutputVariable = argv[i];
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}
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else
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{
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tryCompile.push_back(argv[i]);
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}
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}
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}
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// although they could be used together, don't allow it, because
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// using OUTPUT_VARIABLE makes crosscompiling harder
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if (this->OutputVariable.size()
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&& ((this->RunOutputVariable.size())
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|| (this->CompileOutputVariable.size())))
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{
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cmSystemTools::Error(
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"You cannot use OUTPUT_VARIABLE together with COMPILE_OUTPUT_VARIABLE "
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"or RUN_OUTPUT_VARIABLE. Please use only COMPILE_OUTPUT_VARIABLE and/or "
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"RUN_OUTPUT_VARIABLE.");
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return false;
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}
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bool captureRunOutput = false;
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if (this->OutputVariable.size())
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{
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captureRunOutput = true;
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tryCompile.push_back("OUTPUT_VARIABLE");
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tryCompile.push_back(this->OutputVariable);
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}
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if (this->CompileOutputVariable.size())
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{
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tryCompile.push_back("OUTPUT_VARIABLE");
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tryCompile.push_back(this->CompileOutputVariable);
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}
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if (this->RunOutputVariable.size())
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{
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captureRunOutput = true;
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}
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this->RunResultVariable = argv[0];
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this->CompileResultVariable = argv[1];
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// do the try compile
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int res = this->TryCompileCode(tryCompile);
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// now try running the command if it compiled
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if (!res)
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{
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if (this->OutputFile.size() == 0)
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{
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cmSystemTools::Error(this->FindErrorMessage.c_str());
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}
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else
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{
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// "run" it and capture the output
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std::string runOutputContents;
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if (this->Makefile->IsOn("CMAKE_CROSSCOMPILING"))
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{
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this->DoNotRunExecutable(runArgs,
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argv[3],
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captureRunOutput ? &runOutputContents : 0);
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}
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else
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{
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this->RunExecutable(runArgs, &runOutputContents);
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}
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// now put the output into the variables
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if(this->RunOutputVariable.size())
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{
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this->Makefile->AddDefinition(this->RunOutputVariable.c_str(),
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runOutputContents.c_str());
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}
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if(this->OutputVariable.size())
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{
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// if the TryCompileCore saved output in this outputVariable then
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// prepend that output to this output
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const char* compileOutput
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= this->Makefile->GetDefinition(this->OutputVariable.c_str());
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if (compileOutput)
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{
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runOutputContents = std::string(compileOutput) + runOutputContents;
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}
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this->Makefile->AddDefinition(this->OutputVariable.c_str(),
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runOutputContents.c_str());
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}
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}
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}
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// if we created a directory etc, then cleanup after ourselves
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if(!this->Makefile->GetCMakeInstance()->GetDebugTryCompile())
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{
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this->CleanupFiles(this->BinaryDirectory.c_str());
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}
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return true;
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}
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void cmTryRunCommand::RunExecutable(const std::string& runArgs,
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std::string* out)
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{
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int retVal = -1;
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std::string finalCommand = cmSystemTools::ConvertToRunCommandPath(
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this->OutputFile.c_str());
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if (runArgs.size())
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{
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finalCommand += runArgs;
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}
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int timeout = 0;
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bool worked = cmSystemTools::RunSingleCommand(finalCommand.c_str(),
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out, &retVal,
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0, false, timeout);
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// set the run var
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char retChar[1000];
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if (worked)
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{
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sprintf(retChar, "%i", retVal);
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}
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else
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{
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strcpy(retChar, "FAILED_TO_RUN");
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}
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this->Makefile->AddCacheDefinition(this->RunResultVariable.c_str(), retChar,
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"Result of TRY_RUN",
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cmCacheManager::INTERNAL);
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}
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/* This is only used when cross compiling. Instead of running the
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executable, two cache variables are created which will hold the results
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the executable would have produced.
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*/
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void cmTryRunCommand::DoNotRunExecutable(const std::string& runArgs,
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const std::string& srcFile,
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std::string* out
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)
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{
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std::string internalRunOutputName = this->RunResultVariable+"__"
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+this->CompileResultVariable+"__TRYRUN_OUTPUT";
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bool error = false;
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std::string info = "Source file: ";
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info += srcFile + "\n";
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if (runArgs.size())
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{
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info += "Run arguments: ";
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info += runArgs;
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info += "\n";
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}
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info += "Current CMake stack: " + this->Makefile->GetListFileStack();
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if (this->Makefile->GetDefinition(this->RunResultVariable.c_str()) == 0)
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{
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// if the variables doesn't exist, create it with a helpful error text
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// and mark it as advanced
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std::string comment;
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comment += "Run result of TRY_RUN().\n"
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"This variable should indicate whether the executable would "
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"have been able to run if it was executed on its target "
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"platform.\n"
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"If it would have been able to run, enter the exit code here "
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"(in many cases 0 for success). If not, enter "
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"\"FAILED_TO_RUN\" here.";
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if (out!=0)
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{
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comment += "If it was able to run, also check the variable ";
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comment += internalRunOutputName;
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comment += " and set it appropriately.";
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}
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comment += "\n";
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comment += info;
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this->Makefile->AddCacheDefinition(this->RunResultVariable.c_str(),
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"PLEASE_FILL_OUT-FAILED_TO_RUN",
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comment.c_str(),
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cmCacheManager::STRING);
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cmCacheManager::CacheIterator it = this->Makefile->GetCacheManager()->
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GetCacheIterator(this->RunResultVariable.c_str());
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if ( !it.IsAtEnd() )
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{
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it.SetProperty("ADVANCED", "1");
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}
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error = true;
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}
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if (out!=0)
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{
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if (this->Makefile->GetDefinition(internalRunOutputName.c_str()) == 0)
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{
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// if the variables doesn't exist, create it with a helpful error text
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// and mark it as advanced
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std::string comment;
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comment += "Output of TRY_RUN().\n"
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"This variable should contain the text, which the executable "
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"run by TRY_RUN() would have printed on stdout and stderr, "
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"if it was executed on its target platform.\n"
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"The accompanying variable ";
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comment += this->RunResultVariable;
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comment += " indicates whether the executable would have been able to "
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"run and its exit code."
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"If the executable would not have been able to run, set ";
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comment += internalRunOutputName;
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comment += " empty. Otherwise check if the output is evaluated by the "
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"calling CMake code. If this is the case, check the source "
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"file what it would have printed if called with the given "
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"arguments.\n";
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comment += info;
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this->Makefile->AddCacheDefinition(internalRunOutputName.c_str(),
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"PLEASE_FILL_OUT-NOTFOUND",
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comment.c_str(),
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cmCacheManager::STRING);
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cmCacheManager::CacheIterator it = this->Makefile->GetCacheManager()->
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GetCacheIterator(internalRunOutputName.c_str());
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if ( !it.IsAtEnd() )
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{
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it.SetProperty("ADVANCED", "1");
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}
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error = true;
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}
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}
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if (error)
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{
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std::string errorMessage = "TRY_RUN() invoked in cross-compiling mode, "
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"please set the following cache variables "
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"appropriatly:\n";
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errorMessage += " " + this->RunResultVariable + " (advanced)\n";
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if (out!=0)
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{
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errorMessage += " " + internalRunOutputName + " (advanced)\n";
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}
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errorMessage += info;
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cmSystemTools::Error(errorMessage.c_str());
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return;
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}
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if (out!=0)
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{
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(*out) = this->Makefile->GetDefinition(internalRunOutputName.c_str());
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}
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}
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