Hacking Linux for the Raspberry Pi - Raspberry Pi Hacks - page 65

Unpack the crosstool-ng source tarball into your home directory:
$ tar xvfj crosstool-ng-1.18.0.tar.bz2
Fix for PPL Bug
The version of the Parma Polyhedra Library (PPL) that crosstool-ng uses
(0.11.2) has a bug in it. Specifically, it is not compatible with newer versions
of the GNU Multiple Precision Arithmetic Library (GMP). We have provided
a fix for this, to allow PPL to compile properly against more recent versions
of GMP. There is a patch file named 101-gmp-build-fix.patch in our GitHub
repository . First, clone a local copy of our GitHub tree into your home di-
rectory, then copy the patch file into the crosstool-ng source directory:
$ cd ~
$ git clone https://github.com/spotrh/rpihacks
Cloning into 'rpihacks'...
remote: Counting objects: 247, done.
remote: Compressing objects: 100% (190/190), done.
remote: Total 247 (delta 75), reused 206 (delta 37)
Receiving objects: 100% (247/247), 251.84 KiB | 0 bytes/s, done.
Resolving deltas: 100% (75/75), done.
$ cp -a rpihacks/101-gmp-build-fix.patch ~/crosstool-ng-1.18.0/patch
es/ppl/0.11.2/
By placing this patch file in the crosstool-ng-1.18.0/patches/ppl/
0.11.2/ directory, it allows crosstool-ng to apply this fix to PPL 0.11.2 before
it builds it.
On systems with older GMP versions, this patch may not be necessary, but
applying it will not cause any problems. We strongly recommend that you
copy this patch into the crosstool-ng patches tree before proceeding.
Configure crosstool-ng
Go into the crosstool-ng-1.18.0 source directory and run configure . The only option
you will need to pass to it is a prefix value for where you want to install crosstool-ng .
We strongly recommend that you use /opt/crosstool-ng-1.18.0 , just to give it a space
that is guaranteed to be far, far away from the rest of your Linux system:
$ ./configure --prefix=/opt/crosstool-ng-1.18.0