CMake/Source/cmTryCompileCommand.cxx

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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
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
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "cmTryCompileCommand.h"
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#include "cmake.h"
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#include "cmCacheManager.h"
#include "cmGlobalGenerator.h"
#include "cmListFileCache.h"
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#include <cmsys/Directory.hxx>
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int cmTryCompileCommand::CoreTryCompileCode(
cmMakefile *mf, std::vector<std::string> const& argv, bool clean)
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{
// which signature were we called with ?
bool srcFileSignature = false;
unsigned int i;
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// where will the binaries be stored
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const char* binaryDirectory = argv[1].c_str();
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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std::string tmpString;
int extraArgs = 0;
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// look for CMAKE_FLAGS and store them
std::vector<std::string> cmakeFlags;
for (i = 3; i < argv.size(); ++i)
{
if (argv[i] == "CMAKE_FLAGS")
{
// CMAKE_FLAGS is the first argument because we need an argv[0] that
// is not used, so it matches regular command line parsing which has
// the program name as arg 0
for (; i < argv.size() && argv[i] != "COMPILE_DEFINITIONS" &&
argv[i] != "OUTPUT_VARIABLE";
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++i)
{
extraArgs++;
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cmakeFlags.push_back(argv[i]);
}
break;
}
}
// look for OUTPUT_VARIABLE and store them
std::string outputVariable;
for (i = 3; i < argv.size(); ++i)
{
if (argv[i] == "OUTPUT_VARIABLE")
{
if ( argv.size() <= (i+1) )
{
cmSystemTools::Error(
"OUTPUT_VARIABLE specified but there is no variable");
return -1;
}
extraArgs += 2;
outputVariable = argv[i+1];
break;
}
}
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// look for COMPILE_DEFINITIONS and store them
std::vector<std::string> compileFlags;
for (i = 3; i < argv.size(); ++i)
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{
if (argv[i] == "COMPILE_DEFINITIONS")
{
extraArgs++;
for (i = i + 1; i < argv.size() && argv[i] != "CMAKE_FLAGS" &&
argv[i] != "OUTPUT_VARIABLE";
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++i)
{
extraArgs++;
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compileFlags.push_back(argv[i]);
}
break;
}
}
// do we have a srcfile signature
if (argv.size() - extraArgs == 3)
{
srcFileSignature = true;
}
// only valid for srcfile signatures
if (!srcFileSignature && compileFlags.size())
{
cmSystemTools::Error(
"COMPILE_FLAGS specified on a srcdir type TRY_COMPILE");
return -1;
}
// compute the binary dir when TRY_COMPILE is called with a src file
// signature
if (srcFileSignature)
{
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tmpString = argv[1] + "/CMakeFiles/CMakeTmp";
binaryDirectory = tmpString.c_str();
}
// make sure the binary directory exists
cmSystemTools::MakeDirectory(binaryDirectory);
// do not allow recursive try Compiles
if (!strcmp(binaryDirectory,mf->GetHomeOutputDirectory()))
{
cmSystemTools::Error("Attempt at a recursive or nested TRY_COMPILE in directory ",
binaryDirectory);
return -1;
}
std::string outFileName = tmpString + "/CMakeLists.txt";
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// which signature are we using? If we are using var srcfile bindir
if (srcFileSignature)
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{
// remove any CMakeCache.txt files so we will have a clean test
std::string ccFile = tmpString + "/CMakeCache.txt";
cmSystemTools::RemoveFile(ccFile.c_str());
// we need to create a directory and CMakeList file etc...
// first create the directories
sourceDirectory = binaryDirectory;
// now create a CMakeList.txt file in that directory
FILE *fout = fopen(outFileName.c_str(),"w");
if (!fout)
{
cmSystemTools::Error("Failed to create CMakeList file for ",
outFileName.c_str());
cmSystemTools::ReportLastSystemError("");
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return -1;
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}
std::string source = argv[2];
std::string ext = cmSystemTools::GetFilenameExtension(source);
const char* lang = (mf->GetCMakeInstance()->GetGlobalGenerator()
->GetLanguageFromExtension(ext.c_str()));
if(lang)
{
fprintf(fout, "PROJECT(CMAKE_TRY_COMPILE %s)\n", lang);
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}
else
{
cmOStringStream err;
err << "Unknown extension \"" << ext << "\" for file \""
<< source << "\". TRY_COMPILE only works for enabled languages.\n"
<< "Currently enabled languages are:";
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std::vector<std::string> langs;
mf->GetCMakeInstance()->GetGlobalGenerator()->GetEnabledLanguages(langs);
for(std::vector<std::string>::iterator l = langs.begin();
l != langs.end(); ++l)
{
err << " " << *l;
}
err << "\nSee PROJECT command for help enabling other languages.";
cmSystemTools::Error(err.str().c_str());
return -1;
}
std::string langFlags = "CMAKE_";
langFlags += lang;
langFlags += "_FLAGS";
fprintf(fout, "SET(CMAKE_VERBOSE_MAKEFILE 1)\n");
fprintf(fout, "SET(CMAKE_%s_FLAGS \"${CMAKE_%s_FLAGS}", lang, lang);
const char* flags = mf->GetDefinition(langFlags.c_str());
if(flags)
{
fprintf(fout, " %s ", flags);
}
fprintf(fout, " ${COMPILE_DEFINITIONS}\")\n");
fprintf(fout, "INCLUDE_DIRECTORIES(${INCLUDE_DIRECTORIES})\n");
fprintf(fout, "LINK_DIRECTORIES(${LINK_DIRECTORIES})\n");
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// handle any compile flags we need to pass on
if (compileFlags.size())
{
fprintf(fout, "ADD_DEFINITIONS( ");
for (i = 0; i < compileFlags.size(); ++i)
{
fprintf(fout,"%s ",compileFlags[i].c_str());
}
fprintf(fout, ")\n");
}
fprintf(fout, "ADD_EXECUTABLE(cmTryCompileExec \"%s\")\n",source.c_str());
fprintf(fout, "TARGET_LINK_LIBRARIES(cmTryCompileExec ${LINK_LIBRARIES})\n");
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fclose(fout);
projectName = "CMAKE_TRY_COMPILE";
targetName = "cmTryCompileExec";
// if the source is not in CMakeTmp
if(source.find("CMakeTmp") == source.npos)
{
mf->AddCMakeDependFile(source.c_str());
}
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}
// else the srcdir bindir project target signature
else
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{
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projectName = argv[3].c_str();
if (argv.size() - extraArgs == 5)
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{
targetName = argv[4].c_str();
}
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}
bool erroroc = cmSystemTools::GetErrorOccuredFlag();
cmSystemTools::ResetErrorOccuredFlag();
std::string output;
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// actually do the try compile now that everything is setup
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int res = mf->TryCompile(sourceDirectory, binaryDirectory,
projectName, targetName, &cmakeFlags, &output);
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if ( erroroc )
{
cmSystemTools::SetErrorOccured();
}
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// set the result var to the return value to indicate success or failure
mf->AddCacheDefinition(argv[0].c_str(), (res == 0 ? "TRUE" : "FALSE"),
"Result of TRY_COMPILE",
cmCacheManager::INTERNAL);
if ( outputVariable.size() > 0 )
{
mf->AddDefinition(outputVariable.c_str(), output.c_str());
}
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// if They specified clean then we clean up what we can
if (srcFileSignature && clean)
{
cmListFileCache::GetInstance()->FlushCache(outFileName.c_str());
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if(!mf->GetCMakeInstance()->GetDebugTryCompile())
{
cmTryCompileCommand::CleanupFiles(binaryDirectory);
}
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}
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return res;
}
// cmExecutableCommand
bool cmTryCompileCommand::InitialPass(std::vector<std::string> const& argv)
{
if(argv.size() < 3)
{
return false;
}
cmTryCompileCommand::CoreTryCompileCode(m_Makefile,argv,true);
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return true;
}
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void cmTryCompileCommand::CleanupFiles(const char* binDir)
{
if ( !binDir )
{
return;
}
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std::string bdir = binDir;
if(bdir.find("CMakeTmp") == std::string::npos)
{
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cmSystemTools::Error("TRY_COMPILE attempt to remove -rf directory that does not contain CMakeTmp:", binDir);
return;
}
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cmsys::Directory dir;
dir.Load(binDir);
size_t fileNum;
std::set<cmStdString> deletedFiles;
for (fileNum = 0; fileNum < dir.GetNumberOfFiles(); ++fileNum)
{
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if (strcmp(dir.GetFile(static_cast<unsigned long>(fileNum)),".") &&
strcmp(dir.GetFile(static_cast<unsigned long>(fileNum)),".."))
{
if(deletedFiles.find( dir.GetFile(static_cast<unsigned long>(fileNum)))
== deletedFiles.end())
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{
deletedFiles.insert(dir.GetFile(static_cast<unsigned long>(fileNum)));
std::string fullPath = binDir;
fullPath += "/";
fullPath += dir.GetFile(static_cast<unsigned long>(fileNum));
if(cmSystemTools::FileIsDirectory(fullPath.c_str()))
{
cmTryCompileCommand::CleanupFiles(fullPath.c_str());
}
else
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{
if(!cmSystemTools::RemoveFile(fullPath.c_str()))
{
std::string m = "Remove failed on file: ";
m += fullPath;
cmSystemTools::ReportLastSystemError(m.c_str());
}
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}
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}
}
}
}