How to Rebuild Apache httpd to Change suexec AP_DOC_ROOT from /var/www to /home (CentOS & RHEL)

Standard RPM packages of Apache httpd in CentOS and RHEL compile suexec with a hardcoded document root of /var/www (--with-suexec-docroot=/var/www). However, web control panels like Virtualmin host customer accounts under /home. When suexec executes a user script under /home, it aborts with "command not in docroot". Here is how to rebuild the official upstream httpd SRPM with AP_DOC_ROOT set to /home.

Compilation Flag: --with-suexec-docroot=/home

Rebuilding the RPM

# 1. Install build tools and dependencies
yum install rpm-build redhat-rpm-config gcc make -y
yum-builddep httpd -y

# 2. Download and unpack httpd SRPM
mkdir -p ~/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
cd ~/rpmbuild/SRPMS
yumdownloader --source httpd
rpm -ivh httpd-*.src.rpm

# 3. Edit SPECS/httpd.spec and modify suexec docroot
cd ~/rpmbuild/SPECS
sed -i 's|--with-suexec-docroot=/var/www|--with-suexec-docroot=/home|g' httpd.spec

# 4. Rebuild binary RPM
rpmbuild -bb httpd.spec

# 5. Install the custom suexec binary
rpm -Uvh --force ~/rpmbuild/RPMS/x86_64/httpd-*.rpm

Confirm the new docroot:

suexec -V | grep AP_DOC_ROOT