Dimensional Data

Solving an interesting issue upgrading a project from Classic to Clang. A recent blog comment asked for help where a Clang project was linking to vcle.lib, but the library did not exist in the Clang linking path (lib/win32c/release): it’s present only for the classic compiler in lib/win32/release. (Note the C in win32c, meaning Clang.) Why? If you see this error, how do you resolve it and continue? (For those new to C++Builder, ‘classic’ refers to the original old or legacy C++ compiler C++Builder used to use. We still ship it, but these days we strongly encourage everyone to use our default modern compiler, which is based on Clang but with many enhancements. We have good compatibility, with lots of work to ensure you can simply switch compilers and rebuild with minor tweaks at worst, but sometimes people encounter issues. The blog comment that prompted this post was one of them.) If you use C++Builder you might find this post interesting for insight into our RTL, or if you encounter this issue when upgrading a project from the classic to Clang compilers, this post should help you resolve that issue. Let’s dig in to what this library is first, before answering how to solve the issue. Table of Contents vcle and rtle Why would a Clang project link to the Classic library? Linking RTLE.lib correctly Summary vcle and rtle vcle.lib was and still is a library that contains Delphi / C++ bridging code. Some of this also includes C++ implementations of Delphi classes: the typical examples are Delphi strings, where ShortString, AnsiString, WideString and UnicodeString/String are implemented in C++ when you use them from C++Builder, having compatible behaviour and binary layout to a Delphi string, so invisibly bridged. (You can see these in the *string.h files, eg ustring.h. There’s no need to include these headers manually since including VCL or FMX headers brings them in.) Back in the days of the classic compiler, Win32 was the only platform and VCL was the only UI framework. The compatibility bridge library was named “vcle” based on that. But these days, with the Clang compiler, we have multiple platforms and multiple UI frameworks. The bridging is not really to do with any UI framework: it is low level, basic classes, and so is a RTL issue. Thus, for Clang, the same library has the name rtle.lib (Win32) and rtle.a (Win64.) In other words, a Clang project should never link to vcle.lib. It should only ever link to rtle.lib/.a. Why would a Clang project link to the Classic library? The most likely cause for a Clang-compiled project to try to link to vcle.lib is that the project is linking in some object files or a library built with the classic compiler, and those classic-compiled object files are causing vcle to be brought in. It is very important that you don’t mix object files created with both compilers together in the same app. Entirely aside from this issue, they are not binary compatible. Build everything with Clang. To resolve this: Use tdump to identify what’s causing the linker to look for that library. Run tdump on the objects and libraries being linked into your project. Or… Use our inbuilt clang/classic incompatibility autodetection! A couple of years ago in version 10.3.3 we added a linker warning that […]

Hello to C++ developers, whether or not you are just taking your first steps in learning to program or are an experienced coding professional. The gaming industry developed fast in the last two maybe three decades and at its core we often find the C++ language. Did you know you can create games in C++ helped along by the features of a great C++ IDE like C++ Builder, Dev-C++, or RAD Studio? This week, we have another 5 posts focused to teach some first steps of C++ including the steps to develop a very simple game in C++ to help you understand some of the conditional statements and logic of the language. A ‘guessing game’ is really nice simple way to show how a programming language works and how you can have some fun while you learn to code. We also include one of our articles about the C programming language. Although our main focus is. of course, on the C++ programming language, the fact both C and C++ share an ancestry means there is some value in understanding how they are similar, and where they differ too. What’s new in RAD Studio 11.2 with C++? Embarcadero recently announced the release of RAD Studio 11.2 with Delphi 11.2 and C++Builder 11.2. Some of the main new features and enhancements in RAD 11.2 has been listed in this post below: Announcing the Availability of RAD Studio 11.2 Alexandria How can we start writing a C++ Game? These posts are designed to inform you and to be easy to understand the modern and professional ways in which we can use C and C++. Here are the topics, What Is The C++ Programming Language? How To Start Programming In C++ How To Execute A Program In C How To End A C++ Program How To Learn Game Programming In C++ Does C++ Builder have all the answers for these C++ Games? C++ Builder can be used to develop C applications like console applications and C++ applications too. In addition, you can use modern VCL and FMX frameworks with C++ to develop GUI based very professional application. Here are our favorite selections from recent articles on LearnCPlusPlus.org What Is The C++ Programming Language? How To Start Programming In C++ How To Execute A Program In C How To End A C++ Program How To Learn Game Programming In C++ You motivate us so much with your likes and comments on social media and here. Thank you for all your valuable comments and questions. All them help improve the quality of our future posts and new codes in these posts. We have a lot of unique posts waiting to come. We keep adding new topics every week about C++ in general and specific topics for C++ Builder, Dev-C++, and for the other C++ compilers. Please keep following our LearnCPlusPlus.org website for the latest posts and updates. Feel free to comment and share with your colleagues, students, members – knowledge is power, and knowledge shared is empowering. C++ Builder is the easiest and fastest C and C++ IDE for building simple or professional applications on the Windows, MacOS, and iOS operating systems. It is also easy for beginners to learn with its wide range of samples, tutorials, help files, and LSP support for code. RAD Studio’s C++ Builder version comes with […]

Hello to all developers. As we write this, a new year is approaching and we have introduction-level beginner posts about C programming that may help and motivate you, your friends and family, or your students to make learning to code your new year resolution and start new apps on Windows, Linux, iOS, or on IoT systems in 2023. The topics in this article are a round-up of the latest C topics from the LearnCPlusPlus website including very simple examples that can be compiled by any C compiler. We try to answer all beginner-level questions, please ask in the comments section below if you need any specific topics or detailed posts. Flowcharts are useful diagrams in software development. In C and C++ programming, flow charts are often used to represent algorithms or some parts of programs or main parts of big C or C++ applications. We explain flowcharts, what they are, and how can you use a flowchart when designing and coding your apps, which programs can be used, and what tools can be used with C++ Builder. Table of Contents Why an introduction to C programming in 2023? What’s new in RAD Studio 11.2 with C++ and C programming? How can we start C++ and C programming in 2023? How C++ Builder can be used in C++ and C programming in 2023? Why an introduction to C programming in 2023? Although our main focus is. of course, on the C++ programming language, the fact both C and C++ share an ancestry means understanding how they are similar, and where they differ helps us choose the best way to use them both and know where one is stronger than the other in any given situation. The C Programming Language was developed in the 1970s and since 1970, there have been many programming languages and have been many changes in C language, like C+, C++, CLANG standards C++99, C++11, C++14, C++17 and C++23. In the history of programming, there was B programming language before C. And there was ALGOL language before the B programming language. In other posts mentioned today, we explain how to create, run and exit C programs using the latest C++ IDE on Windows 10 and Windows 11. C is one of the most powerful programming languages and it’s suitable for a wide variety of uses. You can create a C program and compile it with several different C and C++ compilers and IDEs. You can develop C apps with a free C++ Builder IDE. You can also use the same IDE to develop C++ GUI apps quickly and professionally. Note that you can use C functions in your GUI-based C++ apps too. We have many beneficial posts on LearnCPlusPlus.org, where we cover the skills and activities necessary to develop C++ apps. What’s new in RAD Studio 11.2 with C++ and C programming? Embarcadero recently announced the release of RAD Studio 11.2 with Delphi 11.2 and C++Builder 11.2. Some of the main new features and enhancements in RAD 11.2 has been listed in this post below: Announcing the Availability of RAD Studio 11.2 Alexandria How can we start C++ and C programming in 2023? These posts are designed to inform you and to be easy to understand the modern and professional ways in which we can use C and C++. Here are the topics, […]

In this blog post you’ll find links to recent C++ articles related to the language, programming, ISO standard and software development. The articles included are for the period of November 6, 2022 to December 7, 2022. C++ Language Bjarne Stroustrup was live online on Nov 15, 2022: ‘What is good C++ code?’ Read the Article and Watch the YouTube Video C++ overtakes Java in December 2022 Tiobe language popularity index. Read the InfoWorld article by Paul Krill Reminder: If you intend to use a C++/WinRT namespace, you must include that namespace’s header file Read the Article Port of OpenAI’s Whisper model in C/C++ Find the Project on GitHub The Top 5 Great C++ Tips On Eligible Copy Constructors And Pure Virtual Destructors Read Yılmaz Yörü’s Embarcadero Blog Article Instead of a C++ template parlor trick, why not just add support based on whether the header file has already been included? Read the Article Modern C++ In-Depth – Lambdas, Part 1 Read the Article 5 Easy Steps To A Simple Game Programming in C++ Read the Article C++ template parlor tricks: Using a type before it is defined Read the Article What kind of caller diagnostic information can I get from exceptions thrown by C++/WinRT and wil?, C++20 edition Read the Article Mike Shah’s Modern C++ YouTube Series — Mike Shah Read the Article First videos of Meeting C++ 2022 released Read the Article How a C++ Program Works With Libraries Read the Article How To Program A Robot in C and C++? Read the Article How Do C and C++ Work Internally And More? Read the Article C++ constexpr parlor tricks: How can I obtain the length of a string at compile time? Read the Article Using final in C++ to improve performance — Niall Cooling Read the Article AMA with Sean Parent at Meeting C++ online Read the Article Three new utility functions in C++23 Read the Article Overview of C++ Variable Initialiation — Christian Aichinger Read the Article Lifetime extension of temporary objects in C++: common recommendations and pitfalls Read the Article Software Development How to detect Stack Unwinding in a Destructor in C++? Read the Article Code Analysis Tools for C++ Read the Article Ccache – a fast C/C++ compiler cache Read the Article Visual Studio 2022 Performance: Faster C++ Source Code Indexing Read the Article A Summary Of The Complete Guide To Programming In C++ Read the Article What’s New for C++ Developers in Visual Studio 2022 17.4 — Sy Brand Read the Article FOSSA is announcing the GA of a security and license scanning capability for C and C++ projects Read the Article Artificial Intelligence – A Complete Guide To Programming In C++ Read the Article ISO C++ Standard and Foundation Trip report: Autumn ISO C++ standards meeting (Kona) Read the Article Standard C++ Foundation Annual Report for Fiscal Year 2022 Read the Article Reduce development time and get to market faster with RAD Studio, Delphi, or C++Builder. Design. Code. Compile. Deploy. Start Free Trial   Upgrade Today    Free Delphi Community Edition   Free C++Builder Community Edition