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Projects use `try_compile` to check if they will be able to compile some particular source code. When a language standard variable like `CMAKE_CXX_STANDARD` is set, then the project intends to compile source code using a compiler mode for that standard. Therefore it makes sense for `try_compile` to use that standard in the test project too. Unfortunately this was not done when support for the `CMAKE_CXX_STANDARD` variable was first implemented. Add a policy to introduce the improved behavior in a compatible way. Closes: #16456
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#ifndef cmCoreTryCompile_h
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#define cmCoreTryCompile_h
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#include <cmConfigure.h> // IWYU pragma: keep
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#include <string>
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#include <vector>
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#include "cmCommand.h"
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#include "cmStateTypes.h"
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/** \class cmCoreTryCompile
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* \brief Base class for cmTryCompileCommand and cmTryRunCommand
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*
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* cmCoreTryCompile implements the functionality to build a program.
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* It is the base class for cmTryCompileCommand and cmTryRunCommand.
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*/
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class cmCoreTryCompile : public cmCommand
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{
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public:
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protected:
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/**
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* This is the core code for try compile. It is here so that other
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* commands, such as TryRun can access the same logic without
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* duplication.
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*/
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int TryCompileCode(std::vector<std::string> const& argv, bool isTryRun);
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/**
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* This deletes all the files created by TryCompileCode.
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* This way we do not have to rely on the timing and
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* dependencies of makefiles.
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*/
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void CleanupFiles(const char* binDir);
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/**
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* This tries to find the (executable) file created by
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TryCompileCode. The result is stored in OutputFile. If nothing is found,
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the error message is stored in FindErrorMessage.
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*/
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void FindOutputFile(const std::string& targetName,
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cmStateEnums::TargetType targetType);
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std::string BinaryDirectory;
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std::string OutputFile;
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std::string FindErrorMessage;
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bool SrcFileSignature;
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private:
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std::vector<std::string> WarnCMP0067;
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std::string LookupStdVar(std::string const& var, bool warnCMP0067);
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};
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#endif
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