Woot! I finally got a cross-compiler built and running on OS X.
Crosstool-0.43 had several problems that I wasn't able to resolve. I figured I
wouldn't get very far if it didn't work right off since it hasn't been updated
in a while and forum commentary dated back from several years ago. Then I
stumbled onto Crosstool-NG on Freshmeat. I figured I'd have a much better
chance since the most recent update (1.4.2) was August 5, 2009.
http://ymorin.is-a-geek.org/projects/crosstool
This beasty looked really promising in that it's supposed to have uCLibc and
EABI support i.e. recent stuff.
Almost but not quite. For OS X, it's missing a few GNU items namely sed,
coreutils, libtool, awk, and binutils. I had already used DarwinPorts to get
these in my attempt to use crosstool-0.43. But I still ran into a couple of
glitches. First, it needed to be told where libtool was since DarwinPorts
didn't install this stuff in /usr/local. Then it couldn't work with install
saying that the path entry was a directory. I fudged it to look at
/usr/bin/install. The configuration tool uses curses (I think) to do a
half-decent user-interface for presenting all the settings. Pretty handy if
you want to know what the choices are. It then sets up the master scripts for
building everything. Then the show stopper became some strange error message
that the file system wasn't case-sensitive. The ymorin page had some comments
about OS X but nothing that helped.
A Google search turned up the following start-to-finish procedure for setting
up the whole thing from scratch. It turns out that the default file system on
the Mac isn't case-sensitive but there's a workaround. The following procedure
came from:
http://homepage.mac.com/macg3/TS7390-OSX-crosstool-instructions.txt
So it doesn't get lost, below are the contents. I had to risk using sudo on
all the command-line entries. I also used coreutils 7.5. As you can see the
author did this with the intent on targeting a TS-7390 board. Hello World
works on a 7260. Now all I need is to figure out exactly how to tell XCode to
use the cross compilers.
Compiling cross compiler for default TS-7390 debian system on Mac OS X
Forewarning: It's kind of a pain. Several of OS X's packages aren't good enough
so you need to install some GNU stuff. You might have an easier time using a
package manager for OS X but I prefer to compile everything from source so I'm
going to provide the instructions for that. Also there are a few little catches
with how some of the older gcc/glibc stuff compiles on OS X.
The version of glibc on the TS-7390 default file system is 2.3.6. So we need to
make a compiler with glibc 2.3.6 or older. I guess you can pick whatever
version of gcc you want to use. I'll pick 4.1.2, which is what is included with
the 7390 debian. But you could theoretically do something newer like 4.3.3 (or
older, like 4.0.4) if you want, I think. All I know is the following works fine
for gcc 4.1.2 and glibc 2.3.6.
First, you have to install some prerequisites. Go in a temporary folder
somewhere and follow these directions.
Some of the included OS X utilities aren't cool enough. So we need to download
and install some GNU utilities. Luckily they compile with no trouble in Mac OS
X! Nice work GNU people!
First make sure you've installed the latest version of Xcode so you have gcc on
your Mac.
Install GNU sed into /usr/local. Note: I believe configure defaults to
/usr/local as a prefix, but better safe than sorry.
curl -O http://ftp.gnu.org/gnu/sed/sed-4.2.1.tar.bz2
tar -xf sed-4.2.1.tar.bz2
cd sed-4.2.1
./configure --prefix=/usr/local
make -j 2 (or 4 or whatever...# of jobs that can run in parallel...on a
dual core machine I use 4)
sudo make install
Install GNU coreutils:
curl -O http://ftp.gnu.org/gnu/coreutils/coreutils-7.4.tar.gz
tar -xf coreutils-7.4.tar.gz
cd coreutils-7.4
./configure --prefix=/usr/local
make -j 2
sudo make install
Install GNU libtool:
curl -O http://ftp.gnu.org/gnu/libtool/libtool-2.2.6a.tar.gz
tar -xf libtool-2.2.6a.tar.gz
cd libtool-2.2.6
./configure --prefix=/usr/local
make -j 2
sudo make install
Install GNU awk, needed to fix a weird error in glibc compile:
curl -O http://ftp.gnu.org/gnu/gawk/gawk-3.1.7.tar.bz2
tar -xf gawk-3.1.7.tar.bz2
cd gawk-3.1.7
./configure --prefix=/usr/local
make -j 2
sudo make install
Xcode doesn't come with objcopy/objdump, but you need them. Download GNU
binutils 2.19.1 and install just objcopy and objdump. Not sure how exactly to
do only them so I compile it all and copy them manually....there may be a
better way.
curl -O http://ftp.gnu.org/gnu/binutils/binutils-2.19.1.tar.bz2
tar -xf binutils-2.19.1.tar.bz2
cd binutils-2.19.1
./configure --prefix=/usr/local
make -j 2
sudo cp binutils/obj{dump,copy} /usr/local/bin
Done installing prerequisites...now do the fun stuff!
1) Create a disk image with Disk Utility (in /Utilities/Disk Utility). Open it
and go to File->New->Blank Disk Image.
Save As: Call it whatever you want.
Volume name: Call it CrosstoolCompile
Volume size: Go to custom and choose 2000 MB. This is a temporary image
you can delete once you're done compiling if you wish.
Volume format: Choose Mac OS Extended (Case-sensitive, journaled). Mac
OS X's default file system does not allow you to name two files the same with
different cases (abcd and ABCD) but you need this for crosstool. So that's why
we're creating a disk image. Leave everything else the default and save it
wherever you want.
2) Create another disk image where the final toolchain will be installed.
Your crosstool needs to go on a disk image for the same reason--needs a
case sensitive file system and regular Mac OS X HFS+ is not. So we have to make
another one. Follow the steps above but set the volume name to Crosstool and
then make the volume size something like 300MB. Just make sure you leave plenty
of room for any libraries you want to add to your cross compiler and that kind
of stuff. The resulting toolchain will be about 110 MB in size. Set the Volume
Format to Mac OS Extended (Case-sensitive, journaled). Save this image
somewhere handy because you'll be using it forever after this.
3) Make sure they're both mounted.
4) cd /Volumes/CrosstoolCompile
5) Grab crosstool-ng:
curl -O
http://ymorin.is-a-geek.org/download/crosstool-ng/crosstool-ng-1.4.2.tar.bz2
(OS X doesn't come with wget by default)
6) Expand it
tar -xf crosstool-ng-1.4.2.tar.bz2
cd crosstool-ng-1.4.2
7) Build it
export PATH=/usr/local/bin:$PATH
Make sure you do it like this. /usr/local/bin has to come in the path
BEFORE anything else.
./configure --local
make
8) Configure crosstool
./ct-ng menuconfig
At this point you should have a screen up similar to the Linux kernel config.
Now set up options. Leave options as default if I haven't mentioned them.
Paths and misc options:
Enable Use obsolete features
Enable Try features marked as EXPERIMENTAL
Set prefix directory to:
/Volumes/Crosstool/${CT_TARGET}
(this tells it to install on the disk image you created)
Number of parallel jobs: Multiply the number of cores you have times 2.
That's what I generally do. So my dual core can do 4 jobs. Makes compiling the
toolchain faster.
Target options:
Target Architecture: ARM
Use EABI: Do NOT check this. The default TS Debian filesystem is OABI.
If you are doing an EABI one, you can set this to true (but may want to do a
different version of gcc/glibc)
Architecture level: armv4t
armv4t is for the EP9302. other processors you would pick the
right architecture here.
Floating point: Hardware
I believe this is correct even though it's not really using an FPU
because the pre-EABI debian distro was compiled with hardfloat instructions so
whenever you do a floating point instruction the kernel is actually trapping an
illegal instruction error, makes for slow floating point...EABI is so much
better.
I know hardware is the default, but I just wanted to clarify that you
need to choose hardware here. I'm pretty sure anyway.
Toolchain Options:
Tuple's vendor string: whatever you want. It'll be
arm-yourtuple-linux-gnu when you're finished.
Operating System:
Target OS: linux
Linux kernel version: 2.6.21.7 (best match for TS kernel!)
binutils:
version: 2.19.1
C compiler:
gcc
version: 4.1.2
choose C++ below, so you can compile C++!
C-library:
glibc (NOT eglibc for this)
glibc version: 2.3.6
Threading implementation to use: linuxthreads
(note: nptl is better than linuxthreads, but it looks like nptl didn't support
ARM back in glibc 2.3.6?)
exit and save config.
Now we need to add a patch. Looks like the configure script for glibc does not
like some of apple's binutils, so we need to patch it to skip the version tests
for as and ld. Stick this patch in crosstool-ng-1.4.2/patches/glibc/2.3.6 to
skip the version test for as and ld:
http://homepage.mac.com/macg3/300-glibc-2.3.6-configure-patch-OSX.patch
---------
Okay, done setting up crosstool...now...
./ct-ng build
Sit back, relax, wait a while. Crosstool-ng will do the rest, automatically
downloading tarballs, patching them, installing them. Could take quite a long
time. The actual compiling took about 30 minutes on my older MacBook Pro. When
you're done you have a cross compiler on your disk image that you named
"Crosstool". Look in there and you're all set!
So whenever you want to use the cross compiler, you need to mount this disk
image. You could also create an actual partition on your computer that is Mac
OS X extended case-sensitive if you wish. Then you don't need the disk image.
You can delete the CrosstoolCompile disk image. It was just used temporarily
while compiling everything.
Note that I'm pretty sure gcc 4.1.2 has a bug in assembly generation that will
cause Qt 4.5 to segfault. I'm fairly sure I saw this problem before with 4.1.2.
I know for a fact that gcc 4.3.3 has the bug. This bug report:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39429 has the details. I adapted
the patch at the bottom to work with gcc 4.3.3. you might be able to apply it
to other gcc versions. Not sure. I think 4.0.4 does not have this bug so you
might even try compiling 4.0.4 instead of 4.1.2. Lots of options. Hope this
helps, I've struggled with this stuff a lot but it's so convenient to have a
native OS X toolchain!
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|