Difference between revisions of "C++ Support in Embedded Studio"
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Embedded Studio supports application development in C and C++. |
Embedded Studio supports application development in C and C++. |
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Its C runtime library, based on emRun, provides all fundamentals, tweaked for fastest speed or smallest size. |
Its C runtime library, based on emRun, provides all fundamentals, tweaked for fastest speed or smallest size. |
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''Note: For libcxx, Embedded Studio V5.60 or later is required.'' |
''Note: For libcxx, Embedded Studio V5.60 or later is required.'' |
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| − | The C++ standard library is based on the embedded C++ subset of the [https://libcxx.llvm.org |
+ | The C++ standard library is based on the embedded C++ subset of the [https://libcxx.llvm.org "libc++" C++ Standard Library.] |
To limit download and installation size of Embedded Studio, the library is supplied as additional packages for the supported target architectures. |
To limit download and installation size of Embedded Studio, the library is supplied as additional packages for the supported target architectures. |
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* Open the package manager under Tools -> Package Manager... |
* Open the package manager under Tools -> Package Manager... |
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* Select the "ARM libcxx Library Package [Common]" or "RISCV libcxx Library Package [Common]" for installation. |
* Select the "ARM libcxx Library Package [Common]" or "RISCV libcxx Library Package [Common]" for installation. |
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| + | [[File:Cpp_Package_Manager.PNG|thumb|Package Manager|none]] |
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* Optional: Select the specific libcxx Library Packages for your target architecture(s) for installation. |
* Optional: Select the specific libcxx Library Packages for your target architecture(s) for installation. |
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** 'If not done, Embedded Studio will download the specific package for your project. See next steps.' |
** 'If not done, Embedded Studio will download the specific package for your project. See next steps.' |
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* Option the project options and go to Code -> Libraries. |
* Option the project options and go to Code -> Libraries. |
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* In "libcxx Library" select "Yes" or "Yes (No Exceptions)". |
* In "libcxx Library" select "Yes" or "Yes (No Exceptions)". |
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| + | [[File:Cpp_Project_Option.png|thumb|Project Options|none]] |
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* Press OK to save the project options. |
* Press OK to save the project options. |
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* If the specific package for your project has not been installed, yet, Embedded Studio prompts to download and install the package now. |
* If the specific package for your project has not been installed, yet, Embedded Studio prompts to download and install the package now. |
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** Press Yes. |
** Press Yes. |
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** Press Next to continue the download and installation. |
** Press Next to continue the download and installation. |
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| + | [[File:Cpp_Additional_Pack.png|thumb|Package Prompt|none]] |
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The project is now configured to use the C++ standard library. |
The project is now configured to use the C++ standard library. |
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Include the necessary headers and start using the library functions. |
Include the necessary headers and start using the library functions. |
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| − | == How to use the STLport Library (Legacy) == |
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| − | Embedded Studio V5.50 and prior do not support the libcxx library. Instead STLPort is available. |
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| − | * Open the package manager under Tools -> Package Manager... |
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| − | * Select the "STLPort Library Package" for installation. |
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| − | * Press Next to continue the download and installation. |
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| − | * Open or create a project. |
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| − | * Open the project options and go to Code -> Libraries. |
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| − | * In "STLPort Library" select "Yes". |
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| − | * Press OK ti save the project options. |
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| − | The project is now configured to use STLPort as its C++ standard library. |
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== Enabling Exception Support == |
== Enabling Exception Support == |
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* Set project option "Enable Exception Support" to Yes. |
* Set project option "Enable Exception Support" to Yes. |
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* Make sure that sections readonly and readexec are placed in your linker script. |
* Make sure that sections readonly and readexec are placed in your linker script. |
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| + | == Changing the C++ standard == |
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| + | Per default C++ support is set to gnu++98. If you are using more modern features of C++ make sure to change the standard to the respective version in project options under Code->Compiler->C++ Language Standard |
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Revision as of 11:02, 9 January 2023
Embedded Studio supports application development in C and C++. Its C runtime library, based on emRun, provides all fundamentals, tweaked for fastest speed or smallest size. In addition, the C++ library provides all required features for efficient C++ applications.
The C++ library adds:
- C++ header files to wrap up their C equivalents. e.g. cmath to math.h.
- C++-specific names and functions and mangled names for math.h. e.g. classification (isinf) and comparison (isless) functions, and cosf to cos(float) / cos to cos(double).
- C++ header files for exception, new, typeinfo.
- C++ unwinding library. Functions used for target unwinding, such as to implement exceptions.
- The C++ ABI library. Low-level support for standard C++ libraries.
- The C++ standard library.
This article describes how to enable the C++ libraries in Embedded Studio to use C++ library functions in target applications.
How to use the C++ Library
Note: For libcxx, Embedded Studio V5.60 or later is required.
The C++ standard library is based on the embedded C++ subset of the "libc++" C++ Standard Library.
To limit download and installation size of Embedded Studio, the library is supplied as additional packages for the supported target architectures. To enable the library in a project, only the common package needs to be installed. Embedded Studio takes care of downloading the specific packages if required.
- Open the package manager under Tools -> Package Manager...
- Select the "ARM libcxx Library Package [Common]" or "RISCV libcxx Library Package [Common]" for installation.
- Optional: Select the specific libcxx Library Packages for your target architecture(s) for installation.
- 'If not done, Embedded Studio will download the specific package for your project. See next steps.'
- Press Next to continue the download and installation.
The library is now ready to use and can be enabled in new and existing projects.
- Open or create a project.
- Option the project options and go to Code -> Libraries.
- In "libcxx Library" select "Yes" or "Yes (No Exceptions)".
- Press OK to save the project options.
- If the specific package for your project has not been installed, yet, Embedded Studio prompts to download and install the package now.
- Press Yes.
- Press Next to continue the download and installation.
The project is now configured to use the C++ standard library. Include the necessary headers and start using the library functions.
Enabling Exception Support
To enable exception support in your C++ project the following must be considered:
- Make sure your library is installed as explained above. (Project option libcxx Library = Yes)
- Set project option "Enable Exception Support" to Yes.
- Make sure that sections readonly and readexec are placed in your linker script.
Changing the C++ standard
Per default C++ support is set to gnu++98. If you are using more modern features of C++ make sure to change the standard to the respective version in project options under Code->Compiler->C++ Language Standard
