Name: What happens before main()?
Start: 2025-11-19T18:00:00+01:00
End: 2025-11-19T20:00:00+01:00
Location: Nexer Group

Hello all! Welcome to our C++ meetup for November.

This time Björn Andersson will deliver a presentation about what actually happens before a program starta executing and the main function is called. This is a re-run of a presentation done at the FOSS North Community day earlier this year.

We are kindly hosted by Nexer this time.

**Abstract**
Have you ever wondered what happens before the main() function starts running your program? Many programmers assume that a program begins in main, but there's a crucial sequence of steps that leads the processor to that point.

In this talk, we will explore, step-by-step, what happens from the point of the processor being powered on how a freestanding, non-trivial C++ program on an embedded device is being prepared before invoking main(). Examples will be based on an STM32 ARM Cortex-M4 core.

**Agenda**:
18:00 Doors open
18:30 Introduction from GbgCpp and our host
18:40 Björn Andersson - What happens before main?
20:00 Event over

Daniel Eriksson

Dave Brown

GbgCpp - Gothenburg C++ Meetup

SwedenCpp

Kindly provides free CLion licenses for some of our event visitors.

JetBrains

Hands Development AB

Member, speaker, first major SwedenCpp-Pro supporter

Arvid Norberg

Net Insight

Prevas

Atlas Copco

Nexer Group

Berotec

think-cell

Sylog

Excillum

Scionova AB

Consat

Technology

C & C++

Programming Languages

Functional Programming

What happens before main()?

Share

GbgCpp - Gothenburg C++ Meetup

What happens before main()?

GbgCpp - Gothenburg C++ Meetup

Details

Sponsors

Members are also interested in