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STYLE: put a lot of comments into the generated cmake-cache preloading file to aid the user with using it

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Alex
This commit is contained in:
Alexander Neundorf 2007-07-23 13:13:29 -04:00
parent 3c92cfbea0
commit 7497f8accf
1 changed files with 49 additions and 16 deletions
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57
Source/cmTryRunCommand.cxx
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@ -229,13 +229,10 @@ void cmTryRunCommand::DoNotRunExecutable(const std::string& runArgs,
bool error = false; bool error = false;
std::string info = "Source file: "; std::string info = "Source file: ";
info += srcFile + "\n"; info += srcFile + "\n";
if (runArgs.size())
{
info += "Run arguments: "; info += "Run arguments: ";
info += runArgs; info += runArgs;
info += "\n"; info += "\n";
} info += " Called from: " + this->Makefile->GetListFileStack();
info += "Current CMake stack: " + this->Makefile->GetListFileStack();
if (this->Makefile->GetDefinition(this->RunResultVariable.c_str()) == 0) if (this->Makefile->GetDefinition(this->RunResultVariable.c_str()) == 0)
{ {
@ -313,24 +310,60 @@ void cmTryRunCommand::DoNotRunExecutable(const std::string& runArgs,
if (error) if (error)
{ {
static bool firstRun = true; static bool firstTryRun = true;
std::string fileName = this->Makefile->GetHomeOutputDirectory(); std::string fileName = this->Makefile->GetHomeOutputDirectory();
fileName += "/TryRunResults.cmake"; fileName += "/TryRunResults.cmake";
std::ofstream file(fileName.c_str(), firstRun?std::ios::out : std::ios::app); std::ofstream file(fileName.c_str(), firstTryRun?std::ios::out : std::ios::app);
if ( file ) if ( file )
{ {
file << "SET( " << internalRunOutputName << " \"" if (firstTryRun)
<< this->Makefile->GetDefinition(this->RunResultVariable.c_str()) {
<< "\" CACHE STRING \"Result from TRY_RUN\" )\n\n"; file << "# This file was generated by CMake because it detected "
"TRY_RUN() commands\n"
"# in crosscompiling mode. It will be overwritten by the next "
"CMake run.\n"
"# Copy it to a safe location, set the variables to "
"appropriate values\n"
"# and use it then to preset the CMake cache (using -C).\n\n";
}
std::string comment ="\n";
comment += this->RunResultVariable;
comment += "\nindicates whether the executable would have been able to "
"run if it was\n"
"executed on its target platform. If it would have been able to "
"run, set it to\n"
"the exit code (in many cases 0 for success). If not, enter "
"\"FAILED_TO_RUN\".\n\n";
if (out!=0) if (out!=0)
{ {
file << "SET( " << this->RunResultVariable << " \"" comment += internalRunOutputName;
comment += "\ncontains the text, which the executable "
" would have printed on stdout and stderr.\n"
"If the executable would not have been able to run, set it empty.\n"
"Otherwise check if the output is evaluated by the "
"calling CMake code. If so,\n"
"check what the source file would have printed when called with "
"the given arguments.\n\n";
}
comment += info;
cmsys::SystemTools::ReplaceString(comment, "\n", "\n# ");
file << comment << "\n\n";
file << "SET( " << this->RunResultVariable << " \n \""
<< this->Makefile->GetDefinition(this->RunResultVariable.c_str())
<< "\"\n CACHE STRING \"Result from TRY_RUN\" )\n\n";
if (out!=0)
{
file << "SET( " << internalRunOutputName << " \n \""
<< this->Makefile->GetDefinition(internalRunOutputName.c_str()) << this->Makefile->GetDefinition(internalRunOutputName.c_str())
<< "\" CACHE STRING \"Output from TRY_RUN\" )\n\n"; << "\"\n CACHE STRING \"Output from TRY_RUN\" )\n\n";
} }
file.close(); file.close();
} }
firstRun = false; firstTryRun = false;
std::string errorMessage = "TRY_RUN() invoked in cross-compiling mode, " std::string errorMessage = "TRY_RUN() invoked in cross-compiling mode, "
"please set the following cache variables " "please set the following cache variables "