Add build instructions and refresh the code to make it buildable

[ericzolf]

As the subject says, there are no build instructions and I don't know if the code can be built on a modern Linux host.

[ericzolf]

Just noticed that there is still a package of rdiff-backup-fs in Debian so the code seems buildable with few patches, and documented dependencies.

@anotherMuppet on which Linux did you try to build the code?

[anotherMuppet]

debian testing

…

On Tue, 23 Mar 2021 at 16:59, Eric L. ***@***.***> wrote: Just noticed that there is still a package of rdiff-backup-fs in Debian <https://packages.debian.org/stable/utils/rdiff-backup-fs> so the code seems buildable with few patches, and documented dependencies. @anotherMuppet <https://github.com/anotherMuppet> on which Linux did you try to build the code? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#4 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ATBO3C26QFNUBQDI2IWYAR3TFAU2PANCNFSM4ZUPXK7Q> .

[ericzolf]

ChatGPT gave me the following; I have no clue but that looks relatively sound:

# ===========================
# rdiff-backup-fs Build Setup
# ===========================

# ---------------------------
# 1. Install dependencies
# ---------------------------

# Debian / Ubuntu
if [ -f /etc/debian_version ]; then
    sudo apt update
    sudo apt install -y \
        build-essential \
        autoconf automake libtool pkg-config \
        libfuse3-dev libssl-dev zlib1g-dev \
        git
fi

# Fedora / RHEL / CentOS
if [ -f /etc/fedora-release ] || [ -f /etc/redhat-release ]; then
    sudo dnf install -y \
        gcc gcc-c++ make automake autoconf libtool \
        pkgconf-pkg-config fuse3-devel openssl-devel zlib-devel \
        git
fi

# ---------------------------
# 2. Clone the repository
# ---------------------------
git clone https://github.com/rdiff-backup/rdiff-backup-fs.git
cd rdiff-backup-fs

# Optional: checkout PR #XX branch
#git fetch origin pull/7/head:prXX
#git checkout prXX

# ---------------------------
# 3. Prepare the build system
# ---------------------------
# Only needed if configure is missing or you changed configure.ac
autoreconf -i

# ---------------------------
# 4. Configure the build
# ---------------------------
./configure --prefix=/usr

# ---------------------------
# 5. Build
# ---------------------------
make -j$(nproc)

# ---------------------------
# 6. Test (optional but recommended)
# ---------------------------
make check

# ---------------------------
# 7. Install
# ---------------------------
sudo make install

# ---------------------------
# 8. Verify
# ---------------------------
rdiff-backup-fs --help

# Optional: test mounting
mkdir /tmp/testmount
rdiff-backup-fs /tmp/testmount