Table of Contents
This chapter explains how to build an application with Sourcery G++ Lite using the command line. As elsewhere in this manual, this section assumes that your target system is mips-sde-elf, as indicated by the mips-sde-elf command prefix.
Using an editor (such as notepad on Microsoft
Windows or vi on UNIX-like systems), create a
file named main.c
containing the following
simple factorial program:
#include <stdio.h> int factorial(int n) { if (n == 0) return 1; return n * factorial (n - 1); } int main () { int i; int n; for (i = 0; i < 10; ++i) { n = factorial (i); printf ("factorial(%d) = %d\n", i, n); } return 0; }
Compile and link this program using the command:
> mips-sde-elf-gcc -o factorial main.c -T script
Sourcery G++ requires that you specify a linker script with the
-T
option to build applications for bare-board targets.
Linker errors like undefined reference to `read'
are a symptom of failing to use an appropriate linker script.
Default linker scripts are provided in mips-sde-elf/lib
.
Refer to Chapter 5, “CS3™: The CodeSourcery Common Startup Code Sequence” for information
about the boards and linker scripts supported by Sourcery G++ Lite.
There should be no output from the compiler. (If you are building a C++ application, instead of a C application, replace mips-sde-elf-gcc with mips-sde-elf-g++.)