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CMake/Source/cmCoreTryCompile.cxx
Brad King 710bde43aa cmCoreTryCompile: Fix internal argument vector construction 
In TryCompileCode we construct an internal argv[] vector that needs to
have a fake argv[0] so our internal cmake command line looks like a real
command line.  Fix construction of the fake argv[0] when try_compile is
called without the CMAKE_FLAGS argument.  Otherwise the first internal
-DVAR=val argument that we use to pass information like
CMAKE_OSX_SYSROOT is ignored.
2015-09-24 15:26:32 -04:00

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2011 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#include "cmCoreTryCompile.h"
#include "cmake.h"
#include "cmOutputConverter.h"
#include "cmGlobalGenerator.h"
#include "cmAlgorithms.h"
#include "cmExportTryCompileFileGenerator.h"
#include <cmsys/Directory.hxx>
#include <assert.h>
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 = true;
const char* sourceDirectory = argv[2].c_str();
const char* projectName = 0;
std::string targetName;
std::vector<std::string> cmakeFlags(1, "CMAKE_FLAGS"); // fake argv[0]
std::vector<std::string> compileDefs;
std::string outputVariable;
std::string copyFile;
std::string copyFileError;
std::vector<cmTarget const*> targets;
std::string libsToLink = " ";
bool useOldLinkLibs = true;
char targetNameBuf[64];
bool didOutputVariable = false;
bool didCopyFile = false;
bool didCopyFileError = false;
bool useSources = argv[2] == "SOURCES";
std::vector<std::string> sources;
enum Doing { DoingNone, DoingCMakeFlags, DoingCompileDefinitions,
DoingLinkLibraries, DoingOutputVariable, DoingCopyFile,
DoingCopyFileError, DoingSources };
Doing doing = useSources? DoingSources : DoingNone;
for(size_t i=3; i < argv.size(); ++i)
{
if(argv[i] == "CMAKE_FLAGS")
{
doing = DoingCMakeFlags;
}
else if(argv[i] == "COMPILE_DEFINITIONS")
{
doing = DoingCompileDefinitions;
}
else if(argv[i] == "LINK_LIBRARIES")
{
doing = DoingLinkLibraries;
useOldLinkLibs = false;
}
else if(argv[i] == "OUTPUT_VARIABLE")
{
doing = DoingOutputVariable;
didOutputVariable = true;
}
else if(argv[i] == "COPY_FILE")
{
doing = DoingCopyFile;
didCopyFile = true;
}
else if(argv[i] == "COPY_FILE_ERROR")
{
doing = DoingCopyFileError;
didCopyFileError = true;
}
else if(doing == DoingCMakeFlags)
{
cmakeFlags.push_back(argv[i]);
}
else if(doing == DoingCompileDefinitions)
{
compileDefs.push_back(argv[i]);
}
else if(doing == DoingLinkLibraries)
{
libsToLink += "\"" + cmSystemTools::TrimWhitespace(argv[i]) + "\" ";
if(cmTarget *tgt = this->Makefile->FindTargetToUse(argv[i]))
{
switch(tgt->GetType())
{
case cmTarget::SHARED_LIBRARY:
case cmTarget::STATIC_LIBRARY:
case cmTarget::INTERFACE_LIBRARY:
case cmTarget::UNKNOWN_LIBRARY:
break;
case cmTarget::EXECUTABLE:
if (tgt->IsExecutableWithExports())
{
break;
}
default:
this->Makefile->IssueMessage(cmake::FATAL_ERROR,
"Only libraries may be used as try_compile or try_run IMPORTED "
"LINK_LIBRARIES. Got " + std::string(tgt->GetName()) + " of "
"type " + tgt->GetTargetTypeName(tgt->GetType()) + ".");
return -1;
}
if (tgt->IsImported())
{
targets.push_back(tgt);
}
}
}
else if(doing == DoingOutputVariable)
{
outputVariable = argv[i].c_str();
doing = DoingNone;
}
else if(doing == DoingCopyFile)
{
copyFile = argv[i].c_str();
doing = DoingNone;
}
else if(doing == DoingCopyFileError)
{
copyFileError = argv[i].c_str();
doing = DoingNone;
}
else if(doing == DoingSources)
{
sources.push_back(argv[i]);
}
else if(i == 3)
{
this->SrcFileSignature = false;
projectName = argv[i].c_str();
}
else if(i == 4 && !this->SrcFileSignature)
{
targetName = argv[i].c_str();
}
else
{
std::ostringstream m;
m << "try_compile given unknown argument \"" << argv[i] << "\".";
this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, m.str());
}
}
if(didCopyFile && copyFile.empty())
{
this->Makefile->IssueMessage(cmake::FATAL_ERROR,
"COPY_FILE must be followed by a file path");
return -1;
}
if(didCopyFileError && copyFileError.empty())
{
this->Makefile->IssueMessage(cmake::FATAL_ERROR,
"COPY_FILE_ERROR must be followed by a variable name");
return -1;
}
if(didCopyFileError && !didCopyFile)
{
this->Makefile->IssueMessage(cmake::FATAL_ERROR,
"COPY_FILE_ERROR may be used only with COPY_FILE");
return -1;
}
if(didOutputVariable && outputVariable.empty())
{
this->Makefile->IssueMessage(cmake::FATAL_ERROR,
"OUTPUT_VARIABLE must be followed by a variable name");
return -1;
}
if(useSources && sources.empty())
{
this->Makefile->IssueMessage(cmake::FATAL_ERROR,
"SOURCES must be followed by at least one source file");
return -1;
}
// 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 (!compileDefs.empty())
{
this->Makefile->IssueMessage(cmake::FATAL_ERROR,
"COMPILE_DEFINITIONS specified on a srcdir type TRY_COMPILE");
return -1;
}
if (!copyFile.empty())
{
this->Makefile->IssueMessage(cmake::FATAL_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())
{
std::ostringstream e;
e << "Attempt at a recursive or nested TRY_COMPILE in directory\n"
<< " " << this->BinaryDirectory << "\n";
this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.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);
// Choose sources.
if(!useSources)
{
sources.push_back(argv[2]);
}
// Detect languages to enable.
cmGlobalGenerator* gg = this->Makefile->GetGlobalGenerator();
std::set<std::string> testLangs;
for(std::vector<std::string>::iterator si = sources.begin();
si != sources.end(); ++si)
{
std::string ext = cmSystemTools::GetFilenameLastExtension(*si);
std::string lang = gg->GetLanguageFromExtension(ext.c_str());
if(!lang.empty())
{
testLangs.insert(lang);
}
else
{
std::ostringstream err;
err << "Unknown extension \"" << ext << "\" for file\n"
<< " " << *si << "\n"
<< "try_compile() works only for enabled languages. "
<< "Currently these are:\n ";
std::vector<std::string> langs;
gg->GetEnabledLanguages(langs);
err << cmJoin(langs, " ");
err << "\nSee project() command to enable other languages.";
this->Makefile->IssueMessage(cmake::FATAL_ERROR, err.str());
return -1;
}
}
// we need to create a directory and CMakeLists file etc...
// first create the directories
sourceDirectory = this->BinaryDirectory.c_str();
// now create a CMakeLists.txt file in that directory
FILE *fout = cmsys::SystemTools::Fopen(outFileName,"w");
if (!fout)
{
std::ostringstream e;
e << "Failed to open\n"
<< " " << outFileName << "\n"
<< cmSystemTools::GetLastSystemError();
this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
return -1;
}
const char* def = this->Makefile->GetDefinition("CMAKE_MODULE_PATH");
fprintf(fout, "cmake_minimum_required(VERSION %u.%u.%u.%u)\n",
cmVersion::GetMajorVersion(), cmVersion::GetMinorVersion(),
cmVersion::GetPatchVersion(), cmVersion::GetTweakVersion());
if(def)
{
fprintf(fout, "set(CMAKE_MODULE_PATH \"%s\")\n", def);
}
std::string projectLangs;
for(std::set<std::string>::iterator li = testLangs.begin();
li != testLangs.end(); ++li)
{
projectLangs += " " + *li;
std::string rulesOverrideBase = "CMAKE_USER_MAKE_RULES_OVERRIDE";
std::string rulesOverrideLang = rulesOverrideBase + "_" + *li;
if(const char* rulesOverridePath =
this->Makefile->GetDefinition(rulesOverrideLang))
{
fprintf(fout, "set(%s \"%s\")\n",
rulesOverrideLang.c_str(), rulesOverridePath);
}
else if(const char* rulesOverridePath2 =
this->Makefile->GetDefinition(rulesOverrideBase))
{
fprintf(fout, "set(%s \"%s\")\n",
rulesOverrideBase.c_str(), rulesOverridePath2);
}
}
fprintf(fout, "project(CMAKE_TRY_COMPILE%s)\n", projectLangs.c_str());
fprintf(fout, "set(CMAKE_VERBOSE_MAKEFILE 1)\n");
for(std::set<std::string>::iterator li = testLangs.begin();
li != testLangs.end(); ++li)
{
std::string langFlags = "CMAKE_" + *li + "_FLAGS";
const char* flags = this->Makefile->GetDefinition(langFlags);
fprintf(fout, "set(CMAKE_%s_FLAGS %s)\n", li->c_str(),
cmOutputConverter::EscapeForCMake(flags?flags:"").c_str());
fprintf(fout, "set(CMAKE_%s_FLAGS \"${CMAKE_%s_FLAGS}"
" ${COMPILE_DEFINITIONS}\")\n", li->c_str(), li->c_str());
}
switch(this->Makefile->GetPolicyStatus(cmPolicies::CMP0056))
{
case cmPolicies::WARN:
if(this->Makefile->PolicyOptionalWarningEnabled(
"CMAKE_POLICY_WARNING_CMP0056"))
{
std::ostringstream w;
w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0056) << "\n"
"For compatibility with older versions of CMake, try_compile "
"is not honoring caller link flags (e.g. CMAKE_EXE_LINKER_FLAGS) "
"in the test project."
;
this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, w.str());
}
case cmPolicies::OLD:
// OLD behavior is to do nothing.
break;
case cmPolicies::REQUIRED_IF_USED:
case cmPolicies::REQUIRED_ALWAYS:
this->Makefile->IssueMessage(
cmake::FATAL_ERROR,
cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0056)
);
case cmPolicies::NEW:
// NEW behavior is to pass linker flags.
{
const char* exeLinkFlags =
this->Makefile->GetDefinition("CMAKE_EXE_LINKER_FLAGS");
fprintf(fout, "set(CMAKE_EXE_LINKER_FLAGS %s)\n",
cmOutputConverter::EscapeForCMake(
exeLinkFlags ? exeLinkFlags : "").c_str());
} break;
}
fprintf(fout, "set(CMAKE_EXE_LINKER_FLAGS \"${CMAKE_EXE_LINKER_FLAGS}"
" ${EXE_LINKER_FLAGS}\")\n");
fprintf(fout, "include_directories(${INCLUDE_DIRECTORIES})\n");
fprintf(fout, "set(CMAKE_SUPPRESS_REGENERATION 1)\n");
fprintf(fout, "link_directories(${LINK_DIRECTORIES})\n");
// handle any compile flags we need to pass on
if (!compileDefs.empty())
{
fprintf(fout, "add_definitions(%s)\n", cmJoin(compileDefs, " ").c_str());
}
/* Use a random file name to avoid rapid creation and deletion
of the same executable name (some filesystems fail on that). */
sprintf(targetNameBuf, "cmTC_%05x",
cmSystemTools::RandomSeed() & 0xFFFFF);
targetName = targetNameBuf;
if (!targets.empty())
{
std::string fname = "/" + std::string(targetName) + "Targets.cmake";
cmExportTryCompileFileGenerator tcfg(gg);
tcfg.SetExportFile((this->BinaryDirectory + fname).c_str());
tcfg.SetExports(targets);
tcfg.SetConfig(this->Makefile->GetSafeDefinition(
"CMAKE_TRY_COMPILE_CONFIGURATION"));
if(!tcfg.GenerateImportFile())
{
this->Makefile->IssueMessage(cmake::FATAL_ERROR,
"could not write export file.");
fclose(fout);
return -1;
}
fprintf(fout,
"\ninclude(\"${CMAKE_CURRENT_LIST_DIR}/%s\")\n\n",
fname.c_str());
}
/* for the TRY_COMPILEs we want to be able to specify the architecture.
So the user can set CMAKE_OSX_ARCHITECTURES to i386;ppc and then set
CMAKE_TRY_COMPILE_OSX_ARCHITECTURES 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.
*/
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);
}
/* on APPLE also pass CMAKE_OSX_SYSROOT to the try_compile */
if(this->Makefile->GetDefinition("CMAKE_OSX_SYSROOT")!=0)
{
std::string flag="-DCMAKE_OSX_SYSROOT=";
flag += this->Makefile->GetSafeDefinition("CMAKE_OSX_SYSROOT");
cmakeFlags.push_back(flag);
}
/* on APPLE also pass CMAKE_OSX_DEPLOYMENT_TARGET to the try_compile */
if(this->Makefile->GetDefinition("CMAKE_OSX_DEPLOYMENT_TARGET")!=0)
{
std::string flag="-DCMAKE_OSX_DEPLOYMENT_TARGET=";
flag += this->Makefile->GetSafeDefinition("CMAKE_OSX_DEPLOYMENT_TARGET");
cmakeFlags.push_back(flag);
}
if (const char *cxxDef
= this->Makefile->GetDefinition("CMAKE_CXX_COMPILER_TARGET"))
{
std::string flag="-DCMAKE_CXX_COMPILER_TARGET=";
flag += cxxDef;
cmakeFlags.push_back(flag);
}
if (const char *cDef
= this->Makefile->GetDefinition("CMAKE_C_COMPILER_TARGET"))
{
std::string flag="-DCMAKE_C_COMPILER_TARGET=";
flag += cDef;
cmakeFlags.push_back(flag);
}
if (const char *tcxxDef = this->Makefile->GetDefinition(
"CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN"))
{
std::string flag="-DCMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN=";
flag += tcxxDef;
cmakeFlags.push_back(flag);
}
if (const char *tcDef = this->Makefile->GetDefinition(
"CMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN"))
{
std::string flag="-DCMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN=";
flag += tcDef;
cmakeFlags.push_back(flag);
}
if (const char *rootDef
= this->Makefile->GetDefinition("CMAKE_SYSROOT"))
{
std::string flag="-DCMAKE_SYSROOT=";
flag += rootDef;
cmakeFlags.push_back(flag);
}
if(this->Makefile->GetDefinition("CMAKE_POSITION_INDEPENDENT_CODE")!=0)
{
fprintf(fout, "set(CMAKE_POSITION_INDEPENDENT_CODE \"ON\")\n");
}
if (const char *lssDef = this->Makefile->GetDefinition(
"CMAKE_LINK_SEARCH_START_STATIC"))
{
fprintf(fout, "set(CMAKE_LINK_SEARCH_START_STATIC \"%s\")\n", lssDef);
}
if (const char *lssDef = this->Makefile->GetDefinition(
"CMAKE_LINK_SEARCH_END_STATIC"))
{
fprintf(fout, "set(CMAKE_LINK_SEARCH_END_STATIC \"%s\")\n", lssDef);
}
/* Set the appropriate policy information for ENABLE_EXPORTS */
fprintf(fout, "cmake_policy(SET CMP0065 %s)\n",
this->Makefile->GetPolicyStatus(cmPolicies::CMP0065) ==
cmPolicies::NEW ? "NEW" : "OLD");
if(const char *ee = this->Makefile->GetDefinition(
"CMAKE_ENABLE_EXPORTS"))
{
fprintf(fout, "set(CMAKE_ENABLE_EXPORTS %s)\n", ee);
}
/* Put the executable at a known location (for COPY_FILE). */
fprintf(fout, "set(CMAKE_RUNTIME_OUTPUT_DIRECTORY \"%s\")\n",
this->BinaryDirectory.c_str());
/* Create the actual executable. */
fprintf(fout, "add_executable(%s", targetName.c_str());
for(std::vector<std::string>::iterator si = sources.begin();
si != sources.end(); ++si)
{
fprintf(fout, " \"%s\"", si->c_str());
// Add dependencies on any non-temporary sources.
if(si->find("CMakeTmp") == si->npos)
{
this->Makefile->AddCMakeDependFile(*si);
}
}
fprintf(fout, ")\n");
if (useOldLinkLibs)
{
fprintf(fout,
"target_link_libraries(%s ${LINK_LIBRARIES})\n",
targetName.c_str());
}
else
{
fprintf(fout, "target_link_libraries(%s %s)\n",
targetName.c_str(),
libsToLink.c_str());
}
fclose(fout);
projectName = "CMAKE_TRY_COMPILE";
}
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,
projectName,
targetName,
this->SrcFileSignature,
&cmakeFlags,
output);
if ( erroroc )
{
cmSystemTools::SetErrorOccured();
}
// set the result var to the return value to indicate success or failure
this->Makefile->AddCacheDefinition(argv[0],
(res == 0 ? "TRUE" : "FALSE"),
"Result of TRY_COMPILE",
cmState::INTERNAL);
if (!outputVariable.empty())
{
this->Makefile->AddDefinition(outputVariable, output.c_str());
}
if (this->SrcFileSignature)
{
std::string copyFileErrorMessage;
this->FindOutputFile(targetName);
if ((res==0) && !copyFile.empty())
{
if(this->OutputFile.empty() ||
!cmSystemTools::CopyFileAlways(this->OutputFile,
copyFile))
{
std::ostringstream emsg;
emsg << "Cannot copy output executable\n"
<< " '" << this->OutputFile << "'\n"
<< "to destination specified by COPY_FILE:\n"
<< " '" << copyFile << "'\n";
if(!this->FindErrorMessage.empty())
{
emsg << this->FindErrorMessage.c_str();
}
if(copyFileError.empty())
{
this->Makefile->IssueMessage(cmake::FATAL_ERROR, emsg.str());
return -1;
}
else
{
copyFileErrorMessage = emsg.str();
}
}
}
if(!copyFileError.empty())
{
this->Makefile->AddDefinition(copyFileError,
copyFileErrorMessage.c_str());
}
}
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<std::string> 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))
{
this->CleanupFiles(fullPath.c_str());
cmSystemTools::RemoveADirectory(fullPath);
}
else
{
#ifdef _WIN32
// Sometimes anti-virus software hangs on to new files so we
// cannot delete them immediately. Try a few times.
cmSystemTools::WindowsFileRetry retry =
cmSystemTools::GetWindowsFileRetry();
while(!cmSystemTools::RemoveFile(fullPath.c_str()) &&
--retry.Count && cmSystemTools::FileExists(fullPath.c_str()))
{
cmSystemTools::Delay(retry.Delay);
}
if(retry.Count == 0)
#else
if(!cmSystemTools::RemoveFile(fullPath))
#endif
{
std::string m = "Remove failed on file: " + fullPath;
cmSystemTools::ReportLastSystemError(m.c_str());
}
}
}
}
}
}
void cmCoreTryCompile::FindOutputFile(const std::string& 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");
#if defined(__APPLE__)
std::string app = "/Debug/" + targetName + ".app";
searchDirs.push_back(app);
#endif
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()))
{
this->OutputFile = cmSystemTools::CollapseFullPath(command);
return;
}
}
std::ostringstream emsg;
emsg << "Unable to find the executable at any of:\n";
emsg << cmWrap(" " + this->BinaryDirectory,
searchDirs,
tmpOutputFile, "\n") << "\n";
this->FindErrorMessage = emsg.str();
return;
}
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