These contain a table of exported symbols, and a table of imported symbols. If you're using Microsoft Visual Studio, you'll see that projects generate. The linking phase is responsible for finding the symbol and correctly linking it to b.cpp (well, actually to the object or library that uses it). Before linking, it simply assumes that that symbol was defined somewhere, but it doesn't yet care where. Now, b.cpp declared that symbol and used it. It basically means that you compiled a bunch of implementation files into object files or libraries and now you want to get them to work together. The specified errors occur during this last stage of compilation, most commonly referred to as linking. Implementations must behave as if these separate phases occur, although in practice different phases might be folded together. Program image which contains information needed for execution in its All such translator output is collected into a Library components are linked to satisfy external references to entities not defined in theĬurrent translation. All external entity references are resolved.Translated translation units and instantiation units are combined as follows:.Resulting tokens are syntactically and semantically analyzed and Each preprocessing token is converted into a token. White-space characters separating tokens are no longer significant.Adjacent string literal tokens are concatenated.The corresponding member of the execution character set In a character literal or a non-raw string literal, is converted to Each source character set member in a character literal or a string literal, as well as each escape sequence and universal-character-name.Preprocessing directives are executed, macro invocations are expanded, and _Pragma unary operator expressions are executed.The source file is decomposed into preprocessing tokens (2.5) and sequences of white-space characters (including comments).Each instance of a backslash character (\) immediately followed by a new-line character is deleted, splicing physical source lines to.(introducing new-line characters for end-of-line indicators) if Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set.The precedence among the syntax rules of translation is specified by the following phases. I have been looking for the Rust a little, but didn't try to run it on MCU for the moment.Compiling a C program takes place in several steps, as specified by 2.2 (credits to Keith Thompson for the reference): I have been using only C for the last 5 years. Nice to see other people willing for the embedded world to move to C . Must simpler indeed! And in the end it's bad for this article: it shows how to call an external software as a post-build step. You have missed the PS in my article ) I wasn't aware of this option when I wrote the article. I wasn't aware of CMake presets, I am going to check them! Thanks! I wanted to make an episode about PC-executed unit tests but never took the time (for the moment?). But once you want to also generate a PC-based software, for instance for unit tests and simulators, the toolchain file seems the obvious way. If your project is solely made to generate a firmware for a MCU, then setting the toolchain directly in the CMakeLists.txt seems indeed simpler and as efficient. Using a tool chain seems to be the CMake way to cross-compile, that's why I show it here. And moving to CMake
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