find .spec file in /usr/src/redhat/SPECS
rpm -bc xxx.spec : build stage
rpm -bi xxx.spec : install stage
rpm -bb xxx.spec : build binary package
rpm -bs xxx.spec : build source package
rpm -ba xxx.spec : build binary & source package
first install source rpm package using rpm command
goto /usr/src/SPECS folder
edit httpd.spec
for example you may want to edit configure part of the httpd.spec file
and then
You can create binary rpm package (redhat 8 & up)
rpmbuild -bb httpd.spec
compiled files will be written in /usr/src/BUILD folder
Then you can use rpm -ivh command to install it.