C++ standard version (-cpp-version)

Specify C++ language standard followed in source code

Description

Specify the C++ language standard that you follow in your source code.

Set Option

User interface (desktop products only): In your project configuration, the option is on the Target & Compiler node. See Dependencies for other options that you must enable.

Command line and options file: Use the option -cpp-version. See Command-Line Information.

Why Use This Option

Use this option so that Polyspace^® can allow features from a specific version of the C++ language standard during compilation. For instance, if you compile with GCC using the flag -std=c++11 or -std=gnu++11, specify cpp11 for this option. If you are not sure of the language standard, specify defined-by-compiler.

For instance, suppose you use range-based for loops. This type of for loop is defined in the C++11 standard but unrecognized in prior standards such as C++03. If the Polyspace compilation uses the C++03 standard, you can see compilation errors.

To check if your compiler allows features specific to a standard, compile code with macros specific to the standard using compiler settings that you typically use. For instance, to check for C++11-specific features, compile this code. The code contains a C++11-specific keyword nullptr. If the macro __cplusplus is not 201103L (indicating C++11), this keyword is used and causes a compilation error.

#if defined(__cplusplus) && __cplusplus >= 201103L
    /* C++11 compiler */
#else
    void* ptr = nullptr;
#endif

If the code compiles, use cpp11 for this option.

Settings

Default: defined-by-compiler

defined-by-compiler

The analysis uses a standard based on your specification for Compiler (-compiler).

See C/C++ Language Standard Used in Polyspace Analysis (Polyspace Bug Finder).

cpp03

The analysis uses the C++03 Standard (ISO^®/IEC 14882:2003).

cpp11

The analysis uses the C++11 Standard (ISO/IEC 14882:2011).

cpp14

The analysis uses the C++14 Standard (ISO/IEC 14882:2014).

cpp17

The analysis uses the C++17 Standard (ISO/IEC 14882:2017).

Dependencies

• This option is available only if you set Source code language (-lang) to CPP or C-CPP.

• If you create a project or options file from your build system using the polyspace-configure command or polyspaceConfigure function, the value of this option is automatically determined from your build system.

  If the build system uses different standards for different files, the subsequent Polyspace analysis can emulate your build system and use different standards for compiling those files. If you open such a project in the Polyspace user interface, the option value is shown as defined-by-compiler. However, instead of one standard, Polyspace uses multiple standards for compiling the files. The analysis uses the hidden option -options-for-sources to associate different standards with different files.

Command-Line Information

Parameter: -cpp-version

Value: defined-by-compiler | cpp03 | cpp11 | cpp14 | cpp17

Default: defined-by-compiler

Example (Bug Finder): polyspace-bug-finder -lang c -sources "file1.c,file2.c" -cpp-version cpp11

Example (Code Prover): polyspace-code-prover -lang c -sources "file1.c,file2.c" -cpp-version cpp11

Example (Bug Finder Server): polyspace-bug-finder-server -lang c -sources "file1.c,file2.c" -cpp-version cpp11

Example (Code Prover Server): polyspace-code-prover-server -lang c -sources "file1.c,file2.c" -cpp-version cpp11