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doc: Update notes about c++11

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Luis Diaz Mas 2021-05-12 20:31:54 +02:00 committed by Luis Díaz Más
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@ -745,20 +745,20 @@ You will find that 3 tests fail at the end of the test suite. It is safe to ign
### 2.17 Building with C++11 and other compilers
Exiv2 uses the default compiler for your system. Exiv2 v0.27 was written to the C++ 1998 standard and uses `auto_ptr`. The C++11 and C++14 compilers will issue deprecation warnings about auto\_ptr. As _auto\_ptr support has been removed from C++17, you cannot build Exiv2 v0.27 with C++17 or later compilers._ Exiv2 v1.0 and later do not use `auto_ptr` and will build with all modern C++ Standard Compilers.
Exiv2 uses the default compiler for your system. Exiv2 v0.27 was written to the C++ 1998 standard and uses `auto_ptr`. The C++11 and C++14 compilers will issue deprecation warnings about `auto_ptr`. As `auto_ptr` support has been removed from C++17, you cannot build Exiv2 v0.27 with C++17 or later compilers._ Exiv2 v1.0 and later do not use `auto_ptr` and will require a compiler compliant with the C++11 Standard.
To build with C++11:
To build Exiv2 v0.27.X with C++11:
```bash
$ cd <exiv2dir>
$ mkdir build ; cd build
$ cmake .. -DCMAKE_CXX_STANDARD=11 -DCMAKE_CXX_FLAGS=-Wno-deprecated
$ make
cd <exiv2dir>
mkdir build ; cd build
cmake .. -DCMAKE_CXX_STANDARD=11 -DCMAKE_CXX_FLAGS=-Wno-deprecated
make
```
The option -DCMAKE\_CXX\_STANDARD=11 specifies the C++ Language Standard. Possible values are 98, 11 or 14.
The option -DCMAKE\_CXX\_STANDARD=11 specifies the C++ Language Standard. Possible values are 98, 11, 14, 17 or 20.
The option -DCMAKE\_CXX\_FLAGS=-Wno-deprecated suppresses warnings from C++11 concerning auto\_ptr. The compiler will issue deprecation warnings about video, eps and ssh code in Exiv2 v0.27. This is intentional. These features of Exiv2 will not be available in Exiv2 v1.0.
The option -DCMAKE\_CXX\_FLAGS=-Wno-deprecated suppresses warnings from C++11 concerning `auto_ptr`. The compiler will issue deprecation warnings about video, eps and ssh code in Exiv2 v0.27. This is intentional. These features of Exiv2 will not be available in Exiv2 v1.0.
**Caution:** Visual Studio users should not use -DCMAKE\_CXX\_FLAGS=-Wno-deprecated.