eCos User Guide
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# Build Tree

The build tree is the directory hierarchy in which all generated files are placed. Generated files consist of the `makefile`, the compiled object files, and a dependency file (with a `.d` extension) for each source file.

## Purpose

The build tree is where all intermediate object files are placed.

## How is it modified?

Recompiling can modify the object files.

## User applications

User application source or binary code should not go in the build tree.

## Examples of files in this hierarchy

`ecos-work/language/c/libc/<version>/src`

  The directory in which object files for the C library are built.

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