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µVision3 User's Guide

µVision3 Overview User Interface Creating Applications Utilities Debugging Debug Commands Debug Functions Simulation Flash Programming Dialogs File Device Database License Management Single-User License Floating-User License Floating License Administrator Edit Find in Files Configuration Editor Colors & Fonts User Keywords Shortcut Keys Templates View Symbol Window Project Components, Enviornment, and Books Project Components Folders/Extensions Books Multi-Project Select Device Options Device Properties Target Target (Keil ARM) Target (Keil C51) Target (Keil C166) Target (Keil C251) Target (GNU ARM) Target (RealView ARM) Output Output (Keil) Output (GNU ARM) Output (RealView ARM) Listing Listing (Keil) Listing (GNU ARM) Listing (RealView ARM) User Keil EC++ Compiler Compiler Keil CA ARM Compiler Keil Cx51 Compiler Keil C166 Compiler Keil C251 Compiler GNU ARM C Compiler RealView ARM C Compiler Assembler Keil AA ARM Assembler Keil Ax51 Assembler Keil A166 Assembler Keil A251 Assembler GNU ARM Assembler RealView ARM Assembler Linker Keil LA Locate Keil LA Misc Keil BL51 Locate Keil BL51 Misc Keil Lx51 Locate Keil Lx51 Misc Keil L166 Locate Keil L166 Misc GNU ARM Linker RealView ARM Linker Debug Utilities Batch Build Debug Breakpoints Debug Settings Logic Analyzer Memory Map Performance Analyzer Function Editor Tools Setup PC-Lint Customize Tools Menu SVCS Configure Version Control Example Programs Command Line Appendix

GNU ARM Linker

Enable Garbage Collection
Enables garbage collection of unused input sections.
Do not use Standard System Startup Files.
Enable this option if your program does not contain a main routine.
Do not use Standard System Libraries
Enable this option if you are supplying own system libraries.
Use Math Libraries
Use C run-time libraries that support floating-point arithmetic.

Text Start
Start address for program code and constants (ROM).
Data Start
Start address for un-initialized variables (RAM).
BSS Start
Start address for initialized variables (RAM).

Linker Script File
The GNU toolchain requires a linker control file that controls the memory layout. A pre-defined linker control file that fits most systems can be found in the folder \ARM\GNU. Since the file needs to be adapted to your application, you should copy it to your project folder and enter it under Options for Target — Linker. The linker control file is needed to define a memory layout, however it may be omitted for very simple test programs.
Include Libraries
Specify archive library files that should be added to the project.
Include Paths
List of paths that will be searched to include archive libraries.
Misc controls
Specify any required linker commands for which there is no individual dialog control.
Linker control string
Displays the current directives at the linker command line.
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