CMake/Source/cmEnableLanguageCommand.h
Brad King b3b57e7a31 enable_language: Clarify documentation
Describe explicitly the scope in which enable_language must be
invoked to handle all direct and indirect uses of a language.

While at it, re-word documentation of the OPTIONAL keyword to
avoid confusion over its partial implementation.
2013-06-12 10:58:32 -04:00

85 lines
2.7 KiB
C++

/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 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.
============================================================================*/
#ifndef cmEnableLanguageCommand_h
#define cmEnableLanguageCommand_h
#include "cmCommand.h"
/** \class cmEnableLanguageCommand
* \brief Specify the name for this build project.
*
* cmEnableLanguageCommand is used to specify a name for this build project.
* It is defined once per set of CMakeList.txt files (including
* all subdirectories). Currently it just sets the name of the workspace
* file for Microsoft Visual C++
*/
class cmEnableLanguageCommand : public cmCommand
{
public:
/**
* This is a virtual constructor for the command.
*/
virtual cmCommand* Clone()
{
return new cmEnableLanguageCommand;
}
/**
* This is called when the command is first encountered in
* the CMakeLists.txt file.
*/
virtual bool InitialPass(std::vector<std::string> const& args,
cmExecutionStatus &status);
/**
* The name of the command as specified in CMakeList.txt.
*/
virtual const char* GetName() const {return "enable_language";}
/**
* Succinct documentation.
*/
virtual const char* GetTerseDocumentation() const
{
return "Enable a language (CXX/C/Fortran/etc)";
}
/**
* More documentation.
*/
virtual const char* GetFullDocumentation() const
{
return
" enable_language(<lang> [OPTIONAL] )\n"
"This command enables support for the named language in CMake. "
"This is the same as the project command but does not create "
"any of the extra variables that are created by the project command. "
"Example languages are CXX, C, Fortran. "
"\n"
"This command must be called in file scope, not in a function call. "
"Furthermore, it must be called in the highest directory common to "
"all targets using the named language directly for compiling sources "
"or indirectly through link dependencies. "
"It is simplest to enable all needed languages in the top-level "
"directory of a project."
"\n"
"The OPTIONAL keyword is a placeholder for future implementation "
"and does not currently work.";
}
cmTypeMacro(cmEnableLanguageCommand, cmCommand);
};
#endif