Does anyone know if the Nios II port of uClinux is available as a simple tarball (i.e. tar.gz or .tgz) that can be downloaded to a Linux machine and configured and built using the nios2-elf-gcc cross compiler? I am actively attempting to rebuild the nios2-gnutools on my Linux box so I can develop the kernel and user applications on it. I will post the results if I am successful. However, if someone has already accomplished this I would be very interested in getting the source.

Just use the source supplied with the Windows "uClinux 2.6 Distribution for Nios II" posted in the forum. Remove CRs from the source-files by using dos2unix or stripcr.c included at the end of this mail (have also included a script which calls this prog.). Build instructions: Installdir=/usr/local/nios2-gnutools (or whatever you want) Sourcedir contents: binutils gdb gcc make newlib Get rid of Cygwin inserted CRs: ./stripcr.sh In sourcedir do: [1] Binutils mkdir binutils-build cd binutils-build ../binutils/configure --target=nios2-elf --program-prefix=nios2-elf- --prefix=$Installdir --exec_prefix=$Installdir -v make all make install [2] GCC export PATH=$PATH:$Installdir mkdir gcc-build cd gcc-build ../gcc/configure --target=nios2-elf --program-prefix=nios2-elf- --prefix=$Installdir --exec_prefix=$Installdir --with-newlib --with-headers=../newlib/newlib/libc/include -v make all make install [3] Make mkdir make-build cd make-build ../make/configure --target=nios2-elf --program-prefix=nios2-elf- --prefix=$Installdir --exec_prefix=$Installdir -v make all make install [4] Newlib cp newlib/newlib/configure.host.normalc newlib/newlib/configure.host mkdir newlib-build cd newlib-build ../make/configure --target=nios2-elf --program-prefix=nios2-elf- --prefix=$Installdir --exec_prefix=$Installdir -v make all make install [5] GDB mkdir gdb-build cd gdb-build ../make/configure --target=nios2-elf --program-prefix=nios2-elf- --prefix=$Installdir --exec_prefix=$Installdir -v make all make install Hope this is helpful Regards Atle ---------------------------------------------- stripcr: ----------------------------------------------# include <stdio.h># include <string.h># include <errno.h> char strip_tmpfile[]="/tmp/stripCR.tmp"; int custom_copy (const char* in, const char* out, int stripCR); int main (argc, argv) int argc; char* argv[]; { int result; while (--argc > 0) { argv++; result = custom_copy (argv[0], strip_tmpfile, 1); if (result==1) { if (custom_copy (strip_tmpfile, argv[0], 0)) exit(-1); printf(" Stripping CR from file %s\n", argv[0]); }else { if (result!=0) exit(-1); } } return 0; } /* return value: 0: no strip, 1: file stripped, otherwise error */ int custom_copy (const char* in, const char* out, int stripCR) { FILE *ifp; /* input file pointer */ FILE *ofp; /* output file pointer */ char ch; int result=0; ifp = fopen (in, "rb"); ofp = fopen (out, "wb"); if (ifp == NULL) { printf ("Could not open %s for reading\n", in); return 0; } if (ofp == NULL) { printf ("Could not open %s for writing.\n", out); return -1; } while (!feof (ifp)) { if(fread ((void*) &ch, 1, 1, ifp)) { if (stripCR && (ch == (char) 0x0D)) { result=1; continue; } fwrite((void*) &ch, 1, 1, ofp); } } fclose (ifp); fclose (ofp); return result; } ------------------------------------------------------- stripcr.sh: -------------------------------------------------------# !/bin/bash# Strips CRs from all Makefiles and sourcefiles # stripcr binary STRIPCR=$PWD"/stripcr/stripcr" SRCDIR=$PWD"/src/" echo $PWD # Makefiles find $SRCDIR $ -name &#39;Makefile&#39; -o -name &#39;Makefile.in&#39; $ -exec $STRIPCR {} \; # Source files find $SRCDIR $ -name &#39;*.c&#39; -o -name &#39;*.h&#39; -o -name &#39;*.S&#39; $ -exec $STRIPCR {} \; # Linker scripts find $SRCDIR $ -name &#39;*.ld&#39; $ -exec $STRIPCR {} \; # Awk, sed and perl scripts find $SRCDIR $ -name &#39;*.awk&#39; -o -name &#39;*.sed&#39; -o -name &#39;*.pl&#39; $ -exec $STRIPCR {} \; # Config find $SRCDIR $ -name &#39;config.in&#39; -o -name &#39;configure.in&#39; -o -name &#39;configure&#39; $ -exec $STRIPCR {} \; # Other find $SRCDIR $ -name &#39;*.md&#39; $ -exec $STRIPCR {} \;

Ooops. Sorry.. the tools are of course included with the Altera Nios kit.

I am having some level of success following your instructions. Your stripcr program and script has been very helpful. I did find that I had to change it so that instead of Makefile.in it looks in any Makefile.* and instead of config.in, it looks at any config.*. I also found that throughout the build I would have to run the script again to strip newly generated files of their carriage returns. Currently I am hung up on the newlib configuration/compile. It is having problems with the following directory of the install: nios2-gnutools/src/newlib-build/nios2-elf/mno-hw-mul/newlib/libc/sys/. The Makefile contains no definition for "sys_dir". Apparently this is where the specific system is called out. In looking at the nios2-gnutools/src/newlib/newlib/libc/sys directory, there are several systems listed. None of them are related to nios, but there is one for linux. I have tried to get the Makefile to use this directory, but it still has issues. Were you able to get your newlib/ items to build properly without any tweaking? If so, was your "sys_dir" variable defined? It was not defined in my setup. Thanks again for your help.

I have just tried to build the tools, and have not experienced any problems (newlib builds just fine). The only thing I&#39;ve done different from the HOWTO I posted was to build only C and C++ for gcc by using: --enable-languages=c,c++. As you say you have to run stripcr() on autogenerated files, maybe that CRs is your problem. Here is an updated version of the stripcr.sh script: # !/bin/bash# Strips CRs (Cygwin ......) from all Makefiles and sourcefiles # stripcr binary STRIPCR="/usr/local/bin/stripcr" SRCDIR=$PWD echo "Stripping CR in "$SRCDIR # Config find $SRCDIR $ -name &#39;config.*&#39; -o -name &#39;configure.*&#39; -o -name &#39;configure&#39; $ -exec $STRIPCR {} \; # Scripts + templates find $SRCDIR $ -name &#39;*.sc&#39; -o -name &#39;*.sh&#39; $ -exec $STRIPCR {} \; # Makefiles find $SRCDIR $ -name &#39;Makefile&#39; -o -name &#39;Makefile.*&#39; $ -exec $STRIPCR {} \; # Source files find $SRCDIR $ -name &#39;*.c&#39; -o -name &#39;*.h&#39; -o -name &#39;*.S&#39; -o -name &#39;*.s&#39; $ -exec $STRIPCR {} \; # Linker scripts find $SRCDIR $ -name &#39;*.ld&#39; $ -exec $STRIPCR {} \; # Awk, sed and perl scripts find $SRCDIR $ -name &#39;*.awk&#39; -o -name &#39;*.sed&#39; -o -name &#39;*.pl&#39; $ -exec $STRIPCR {} \; # Other find $SRCDIR $ -name &#39;*.md&#39; $ -exec $STRIPCR {} \;

Thanks again for your help. I will untar a pristine tarball and try the process over. I have assumed that for the newlib portion in step 4, you meant to have "../newlib/configure" instead of "../make/configure". Is this correct, or is this why I&#39;m having problems?

Linux development environment | Altera Community

26 Replies

Altera_Forum
Honored Contributor
21 years ago
Now it sounds more like the procedure you created the elf file. Can you tell me how you made cpuload.elf? Which linker script are you using?

Regards,
wentao
microtronix
Altera_Forum
Honored Contributor
21 years ago
SUCCESS!!!

I previously diff'd the two different linker scripts elf2flt.ld and nios2-elf2flt.ld and didn't notice a difference.
One of them is a default script that is provided as part of the elf2flt src. The other one I copied from the scripts location in my Windows cygwin environment.

The cygwin version made it all work.

I believe I now have a basic set of development on my Linux machine that will allow me to more quickly develop, compile, build, and track uClinux and applications.

I would like to thank everyone for their help and patience.

For reference, Below I have provided a summarized list of the tasks I performed in order to get a working development environment under Linux.

<div class='quotetop'>QUOTE </div>
--- Quote Start ---
Setting up Nios II Linux Development Environment

Windows Machine with NIOS II IDE and Linux Plugin installed

1. Setup
a. Make sure proper PATHs are set and ENVironment variable are set.

2. Toolchain
a. Create a tarball of c:/altera/kits/nios2/bin/nios2-gnutools directory.
b. Unarchive this tarball onto a Linux machine and use the following scripts:
i. stripcr.sh
ii. binutils_build.sh
iii. gcc_build.sh
iv. make_build.sh
v. newlib_build.sh
vi. gcc_build.sh

3. Elf2flt conversion tool (required by uClinux)
a. Create a tarball of the c:/altera/kits/nios2/examples/software/Linux/utils/elf2flt directory.
b. Unarchive this tarball onto a Linux machine and cross compile with nios2-elf-gcc.

4. uClibc (small c library)
a. Create a tarball of the c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_0.1.0/uClibc/ directory.
b. Unarchive this tarball onto a Linux machine and cross compile with nios2-elf-gcc.

5. uClinux 2.6.x
a. Create a tarball of the c:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_0.1.5/Linux-2.6.x/ directory.
b. Make a dummy Linux kernel project build. This will create a nios2_system.h file. This file must be copied to the Linux machine in the Linux-2.6.x/include/ directory. Anytime there is a hardware change, this file must be recopied to guarantee compatibility.
c. Unarchive this tarball onto a Linux machine. and cross compile with nios2-elf-gcc.[/b]
--- Quote End ---
Altera_Forum
Honored Contributor
21 years ago
Congratulations, trk_golf. And thanks for your sharing of your experiences.

There is a typo in your note regarding building of elf2flt: it should be built with native gcc instead of nios2-elf-gcc.
Altera_Forum
Honored Contributor
21 years ago
You are correct. Thanks for catching that.
Altera_Forum
Honored Contributor
19 years ago
I found a nios2-linux-uclibc-elf2flt program in the /opt/nios2/bin/ directory that the nios2gcc.tar.bz2 file contains. I tried that and it gives the same error. Maybe it is some option we are missing.
Altera_Forum
Honored Contributor
19 years ago
--- Quote Start ---
originally posted by cfavreau@Jul 7 2006, 10:07 PM
i found a nios2-linux-uclibc-elf2flt program in the /opt/nios2/bin/ directory that the nios2gcc.tar.bz2 file contains. i tried that and it gives the same error. maybe it is some option we are missing.
<div align='right'><{post_snapback}> (index.php?act=findpost&pid=16712)
--- quote end ---

--- Quote End ---

What is your error messages?
Please follow the wiki,
http://nioswiki.jot.com/wikihome/operating...ux/compilehello (http://nioswiki.jot.com/wikihome/operatingsystems/%c2%b5clinux/compilehello)

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Linux development environment

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