eCos : Compile and Run sample application on Linux

Question

I have installed eCos OS on a linux system (Ubuntu 13.02). After installation, the eCos files are located in opt/ecos.

As I read the eCos tutorial, I see hello.c is stored in opt/ecos/ecos-3.0/examples/hello.c (And I notice that maybe all main eCos system files store in the ecos-3.0 directory).

I have followed the eCos tutorial found on the official website, but I still cannot successfully compile hello.c.

More detail. When I try to run :

$ export INSTALL_DIR=BASE_DIR/ecos-work/arm_install 
$ TARGET-gcc -g -IBASE_DIR/ecos-work/install/include hello.c \
    -LBASE_DIR/ecos-work/install/lib -Ttarget.ld -nostdlib

I get the error : TARGET-gcc : command not found

I have tried some other tutorials, but I'm still having issues (too messy to list here).

I am looking for step-by-step instruction on compiling hello.c in eCos system. I see the eCos manual lacking in this area.

Thanks :)

Answer 1

It appears that you've missed a subtle convention in the eCos documentation. Items in italics are provided by you! They are variables.

The documentation mentions this here:

Note: Remember that when this manual shows TARGET-gcc you should use 
the full name of the cross compiler, e.g. i386-elf-gcc, arm-elf-gcc, 
or sh-elf-gcc. When compiling for the synthetic Linux target, use the
native gcc which must have the features required by eCos.

Replace TARGET with the appropriate value and BASE_DIR with (I think, in your case) /opt/ecos. You should verify the include directory before moving forward:

$ ls -l /opt/ecos/ecos-work/install/include

If that doesn't list directory contents, then you simply need to locate ecos-work

The Ecosconfig on Windows and Linux Quick Start section of the docs has you create the BASE_DIR directory (below is a snippet that I am quoting ... italics will not display).

$ mkdir BASE_DIR/ecos-work
$ cd BASE_DIR/ecos-work

So, this could be the correct invocation.

$ export INSTALL_DIR=/opt/ecos/ecos-work/arm_install 
$ arm-elf-gcc -g -I/opt/ecos/ecos-work/install/include hello.c \
    -L/opt/ecos/ecos-work/install/lib -Ttarget.ld -nostdlib

Answer 2

you need to do

# source /opt/ecos/ecosenv.sh

Then you can try to compile by changing TARGET=

$ TARGET-gcc -g -IBASE_DIR/ecos-work/install/include hello.c \ -LBASE_DIR/ecos-work/install/lib -Ttarget.ld -nostdlib