What Happens Before Your C Program Reaches the CPU?
The article explains the process that a C program undergoes before it reaches the CPU for execution. It outlines the various stages including preprocessing, compilation, assembly, linking, and loading. Understanding these stages helps clarify common errors and the overall workflow of C programming.
- ▪A C program passes through several stages before execution, including preprocessing, compilation, assembly, linking, and loading.
- ▪The preprocessor handles tasks like header inclusion and macro expansion before the code is compiled.
- ▪The linker combines object files and libraries to produce a complete executable, which is then loaded into memory for execution.
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| Original publisher | DEV.to (Top) |
| Canonical URL | https://dev.to/moksh57/what-happens-before-your-c-program-reaches-the-cpu-42jg |
| Publication time | Sat, 30 May 2026 19:14:05 +0000 |
| Retrieval time | 2026-05-30T19:29:44.116Z |
| Last seen | 2026-05-30T19:29:44.116Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | oxNyQT33_o3D |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 757092) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Moksh Upadhyay Posted on May 30 What Happens Before Your C Program Reaches the CPU? #c #programming #tutorial #computerscience Most developers know how to write C code. Far fewer know what actually happens after they press Run. A common mental model looks like this: Write Code ↓ Click Run ↓ Get Output Enter fullscreen mode Exit fullscreen mode Simple. Intuitive. Completely wrong. Between your source code and the CPU sits an entire toolchain.
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