Difference between revisions of "Create Debian sysroots"

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(Run debootstrap)
(Create directories)
Line 38: Line 38:
  
 
  cd $HOME
 
  cd $HOME
  mkdir -p cross
+
  arches="x86_64-linux-gnu aarch64-linux-gnu mips-linux-gnu mips64el-linux-gnuabi64 powerpc64le-linux-gnu"
 +
for arch in $arches; do mkdir -p "$arch/{lib,usr/{include,lib}}"
  
 
=== Copy sysroots ===
 
=== Copy sysroots ===

Revision as of 14:19, 24 November 2019


Introduction

We'll create Debian sysroots suitable for a GCC cross compiler.

Debootstrap machine

Everything below runs on the debootstrap machine as root:

sudo -i

Prerequisites

Debian or Ubuntu or any system that can run debootstrap.

Install debootstrap

apt install -y debootstrap

Run debootstrap

mkdir -p /tmp/sysroots
cd /tmp/sysroots
arches="amd64,x86_64-linux-gnu arm64,aarch64-linux-gnu mips,mips-linux-gnu mips64el,mips64el-linux-gnuabi64 ppc64el,powerpc64le-linux-gnu"
for arch in $arches; do IFS=","; set $arch; debootstrap --arch "$1" --variant=buildd stable "$2" http://deb.debian.org/debian; unset IFS; done

Fix symlinks

Debootstrap will create absolute symlinks, fix absolute symlinks to refer to the sysroot dir by changing them into relative symlinks.

for arch in $arches; do IFS=","; set $arch; find "$2" -type l -lname '/*' -exec sh -c 'file="$0"; dir=$(dirname "$file"); target=$(readlink "$0"); prefix=$(dirname "$dir" | sed 's@[^/]*@\.\.@g'); newtarget="$prefix$target"; ln -snf $newtarget $file' {} \; ; unset IFS; done

Host machine

Create directories

cd $HOME
arches="x86_64-linux-gnu aarch64-linux-gnu mips-linux-gnu mips64el-linux-gnuabi64 powerpc64le-linux-gnu"
for arch in $arches; do mkdir -p "$arch/{lib,usr/{include,lib}}"

Copy sysroots

See also