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CMake/Source/cmCoreTryCompile.cxx

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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2007 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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 "cmCoreTryCompile.h"
#include "cmake.h"
#include "cmCacheManager.h"
#include "cmGlobalGenerator.h"
#include <cmsys/Directory.hxx>
int cmCoreTryCompile::TryCompileCode(std::vector<std::string> const& argv)
{
this->BinaryDirectory = argv[1].c_str();
this->OutputFile = "";
// which signature were we called with ?
this->SrcFileSignature = false;
unsigned int i;
const char* sourceDirectory = argv[2].c_str();
const char* projectName = 0;
const char* targetName = 0;
int extraArgs = 0;
// 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";
++i)
{
extraArgs++;
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;
}
}
// look for COMPILE_DEFINITIONS and store them
std::vector<std::string> compileFlags;
for (i = 3; i < argv.size(); ++i)
{
if (argv[i] == "COMPILE_DEFINITIONS")
{
extraArgs++;
for (i = i + 1; i < argv.size() && argv[i] != "CMAKE_FLAGS" &&
argv[i] != "OUTPUT_VARIABLE";
++i)
{
extraArgs++;
compileFlags.push_back(argv[i]);
}
break;
}
}
// look for COPY_FILE
std::string copyFile;
for (i = 3; i < argv.size(); ++i)
{
if (argv[i] == "COPY_FILE")
{
if ( argv.size() <= (i+1) )
{
cmSystemTools::Error(
"COPY_FILE specified but there is no variable");
return -1;
}
extraArgs += 2;
copyFile = argv[i+1];
break;
}
}
// do we have a srcfile signature
if (argv.size() - extraArgs == 3)
{
this->SrcFileSignature = true;
}
// compute the binary dir when TRY_COMPILE is called with a src file
// signature
if (this->SrcFileSignature)
{
this->BinaryDirectory += cmake::GetCMakeFilesDirectory();
this->BinaryDirectory += "/CMakeTmp";
}
else
{
// only valid for srcfile signatures
if (compileFlags.size())
{
cmSystemTools::Error(
"COMPILE_FLAGS specified on a srcdir type TRY_COMPILE");
return -1;
}
if (copyFile.size())
{
cmSystemTools::Error("COPY_FILE specified on a srcdir type TRY_COMPILE");
return -1;
}
}
// make sure the binary directory exists
cmSystemTools::MakeDirectory(this->BinaryDirectory.c_str());
// do not allow recursive try Compiles
if (this->BinaryDirectory == this->Makefile->GetHomeOutputDirectory())
{
cmSystemTools::Error(
"Attempt at a recursive or nested TRY_COMPILE in directory ",
this->BinaryDirectory.c_str());
return -1;
}
std::string outFileName = this->BinaryDirectory + "/CMakeLists.txt";
// which signature are we using? If we are using var srcfile bindir
if (this->SrcFileSignature)
{
// remove any CMakeCache.txt files so we will have a clean test
std::string ccFile = this->BinaryDirectory + "/CMakeCache.txt";
cmSystemTools::RemoveFile(ccFile.c_str());
// we need to create a directory and CMakeList file etc...
// first create the directories
sourceDirectory = this->BinaryDirectory.c_str();
// 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("");
return -1;
}
std::string source = argv[2];
std::string ext = cmSystemTools::GetFilenameExtension(source);
const char* lang =(this->Makefile->GetCMakeInstance()->GetGlobalGenerator()
->GetLanguageFromExtension(ext.c_str()));
const char* def = this->Makefile->GetDefinition("CMAKE_MODULE_PATH");
if(def)
{
fprintf(fout, "SET(CMAKE_MODULE_PATH %s)\n", def);
}
if(lang)
{
fprintf(fout, "PROJECT(CMAKE_TRY_COMPILE %s)\n", lang);
}
else
{
cmOStringStream err;
err << "Unknown extension \"" << ext << "\" for file \""
<< source << "\". TRY_COMPILE only works for enabled languages.\n"
<< "Currently enabled languages are:";
std::vector<std::string> langs;
this->Makefile->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());
fclose(fout);
return -1;
}
std::string langFlags = "CMAKE_";
langFlags += lang;
langFlags += "_FLAGS";
fprintf(fout, "SET(CMAKE_VERBOSE_MAKEFILE 1)\n");
fprintf(fout, "SET(CMAKE_%s_FLAGS \"", lang);
const char* flags = this->Makefile->GetDefinition(langFlags.c_str());
if(flags)
{
fprintf(fout, " %s ", flags);
}
fprintf(fout, " ${COMPILE_DEFINITIONS}\")\n");
fprintf(fout, "INCLUDE_DIRECTORIES(${INCLUDE_DIRECTORIES})\n");
fprintf(fout, "SET(CMAKE_SUPPRESS_REGENERATION 1)\n");
fprintf(fout, "LINK_DIRECTORIES(${LINK_DIRECTORIES})\n");
// 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");
}
/* for the TRY_COMPILEs we want to be able to specify the architecture.
So the user can set CMAKE_OSX_ARCHITECTURE to i386;ppc and then set
CMAKE_TRY_COMPILE_OSX_ARCHITECTURE first to i386 and then to ppc to
have the tests run for each specific architecture. Since
cmLocalGenerator doesn't allow building for "the other"
architecture only via CMAKE_OSX_ARCHITECTURES,use to CMAKE_DO_TRY_COMPILE
to enforce it for this case here.
*/
cmakeFlags.push_back("-DCMAKE_DO_TRY_COMPILE=TRUE");
if(this->Makefile->GetDefinition("CMAKE_TRY_COMPILE_OSX_ARCHITECTURES")!=0)
{
std::string flag="-DCMAKE_OSX_ARCHITECTURES=";
flag += this->Makefile->GetSafeDefinition(
"CMAKE_TRY_COMPILE_OSX_ARCHITECTURES");
cmakeFlags.push_back(flag);
}
else if (this->Makefile->GetDefinition("CMAKE_OSX_ARCHITECTURES")!=0)
{
std::string flag="-DCMAKE_OSX_ARCHITECTURES=";
flag += this->Makefile->GetSafeDefinition("CMAKE_OSX_ARCHITECTURES");
cmakeFlags.push_back(flag);
}
fprintf(fout, "ADD_EXECUTABLE(cmTryCompileExec \"%s\")\n",source.c_str());
fprintf(fout,
"TARGET_LINK_LIBRARIES(cmTryCompileExec ${LINK_LIBRARIES})\n");
fclose(fout);
projectName = "CMAKE_TRY_COMPILE";
targetName = "cmTryCompileExec";
// if the source is not in CMakeTmp
if(source.find("CMakeTmp") == source.npos)
{
this->Makefile->AddCMakeDependFile(source.c_str());
}
}
// else the srcdir bindir project target signature
else
{
projectName = argv[3].c_str();
if (argv.size() - extraArgs == 5)
{
targetName = argv[4].c_str();
}
}
bool erroroc = cmSystemTools::GetErrorOccuredFlag();
cmSystemTools::ResetErrorOccuredFlag();
std::string output;
// actually do the try compile now that everything is setup
int res = this->Makefile->TryCompile(sourceDirectory,
this->BinaryDirectory.c_str(),
projectName,
targetName,
&cmakeFlags,
&output);
if ( erroroc )
{
cmSystemTools::SetErrorOccured();
}
// set the result var to the return value to indicate success or failure
this->Makefile->AddCacheDefinition(argv[0].c_str(),
(res == 0 ? "TRUE" : "FALSE"),
"Result of TRY_COMPILE",
cmCacheManager::INTERNAL);
if ( outputVariable.size() > 0 )
{
this->Makefile->AddDefinition(outputVariable.c_str(), output.c_str());
}
if (this->SrcFileSignature)
{
this->FindOutputFile(targetName);
if ((res==0) && (copyFile.size()))
{
if(!cmSystemTools::CopyFileAlways(this->OutputFile.c_str(),
copyFile.c_str()))
{
cmSystemTools::Error("Could not COPY_FILE");
return -1;
}
}
}
return res;
}
void cmCoreTryCompile::CleanupFiles(const char* binDir)
{
if ( !binDir )
{
return;
}
std::string bdir = binDir;
if(bdir.find("CMakeTmp") == std::string::npos)
{
cmSystemTools::Error(
"TRY_COMPILE attempt to remove -rf directory that does not contain "
"CMakeTmp:", binDir);
return;
}
cmsys::Directory dir;
dir.Load(binDir);
size_t fileNum;
std::set<cmStdString> deletedFiles;
for (fileNum = 0; fileNum < dir.GetNumberOfFiles(); ++fileNum)
{
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())
{
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()))
{
this->CleanupFiles(fullPath.c_str());
}
else
{
if(!cmSystemTools::RemoveFile(fullPath.c_str()))
{
std::string m = "Remove failed on file: ";
m += fullPath;
cmSystemTools::ReportLastSystemError(m.c_str());
}
}
}
}
}
}
void cmCoreTryCompile::FindOutputFile(const char* targetName)
{
this->FindErrorMessage = "";
this->OutputFile = "";
std::string tmpOutputFile = "/";
tmpOutputFile += targetName;
tmpOutputFile +=this->Makefile->GetSafeDefinition("CMAKE_EXECUTABLE_SUFFIX");
// a list of directories where to search for the compilation result
// at first directly in the binary dir
std::vector<std::string> searchDirs;
searchDirs.push_back("");
const char* config = this->Makefile->GetDefinition(
"CMAKE_TRY_COMPILE_CONFIGURATION");
// if a config was specified try that first
if (config && config[0])
{
std::string tmp = "/";
tmp += config;
searchDirs.push_back(tmp);
}
searchDirs.push_back("/Debug");
searchDirs.push_back("/Development");
for(std::vector<std::string>::const_iterator it = searchDirs.begin();
it != searchDirs.end();
++it)
{
std::string command = this->BinaryDirectory;
command += *it;
command += tmpOutputFile;
if(cmSystemTools::FileExists(command.c_str()))
{
tmpOutputFile = cmSystemTools::CollapseFullPath(command.c_str());
this->OutputFile = tmpOutputFile;
return;
}
}
cmOStringStream emsg;
emsg << "Unable to find executable for " << this->GetName() << ": tried \"";
for (unsigned int i = 0; i < searchDirs.size(); ++i)
{
emsg << this->BinaryDirectory << searchDirs[i] << tmpOutputFile;
if (i < searchDirs.size() - 1)
{
emsg << "\" and \"";
}
else
{
emsg << "\".";
}
}
this->FindErrorMessage = emsg.str();
return;
}
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