I did the following, in this order, using the instructions provided from the site:
sudo apt install git nasm autoconf automake texinfo flex bison gawk build-essential unzip wget zip less zlib1g-dev xorriso libtool mtools gcc-multilib python3
git clone https://review.haiku-os.org/buildtools
git clone https://review.haiku-os.org/haiku
…/configure --build-cross-tools x86_64 …/…/buildtools
jam -q -j2 @nightly-anyboot
At #8, it told me: "Command ‘jam’ not found, but can be installed with:
sudo apt install ftjam
sudo apt install jam
I assumed I should use “sudo apt install jam”, because I didn’t know what “ftjam” was.
Upon trying to jam again, it told me: “You can only build Haiku with Haiku’s Jam, not Perforce Jam or some other variant (you are using 2.6).”
Thinking maybe I needed to run …/configure again, I tried, and it said:
“…/configure: could not find setfattr, assuming host has no extended attributes.” and quit, saying the crosstools already exist and that it was configured successfully.
So, it won’t let me Jam, because I don’t have Haiku’s Jam and, try as I might, I can’t find anything anywhere that explains why or how to solve.