Building and compiling lgogdownloader on CentOS 7

building_and_compiling_lgogdownloader_on_CentOS_7.txt

Running and Compiling lgogdownloader on CentOS 7
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Requirements:
- CentOS 7 (at least bare-bones, minimal install), download it at https://www.centos.org/download/
- working internet connection 
- access to the lgogdownloader git repository
- access to the CentOS, EPEL and City-Fan.org repositories
- you have some basic linux knowledge what the commands generally do, otherwise look them up before executing them

If you see here '#' as the first character on a line, enter the commands in as root, '$' means that you should do it
with normal user account.

( user root: install missing software )
You need the city-fan.org repository for curl, system distribution version is way too old, alternative is compiling
and installation (lib)curl for yourself.
# yum install wget yum-utils epel-release
# rpm -Uvh http://mirror.city-fan.org/ftp/contrib/yum-repo/city-fan.org-release-2-1.rhel7.noarch.rpm
# yum-config-manager --enable city-fan.org
# yum install git cmake3 gcc gcc-c++ boost boost-devel libcurl-devel liboauth jsoncpp-devel rhash-devel help2man tinyxml2-devel
# yum check-update && yum update

Not strictly necessary, but to activate kernel updates.
# reboot

( switch to your local unprivileged user account! )
$ mkdir -p "$HOME/sources" && cd "$HOME/sources"

In earlier revisions of CentOS 7 you would to have to compile jsoncpp, rhash, oauth and htmlcxx for yourself. The only 
dependency you have to compile for yourself is htmlcxx, which has its problems in being recognized by the system after
installing it.

If you come from an internet search here, these are the generic building and compiling instructions for htmlcxx on CentOS 7, 
this is not specific to lgogdownloader itself.

( local user: compile HTMLCXX from source )
$ cd "$HOME/sources"
$ wget https://kent.dl.sourceforge.net/project/htmlcxx/htmlcxx/0.86/htmlcxx-0.86.tar.gz
$ tar zxf htmlcxx-0.86.tar.gz && cd htmlcxx-0.86 && ./configure 
$ vi +54 html/tree.h ( add '#include "<cstddef>"' without quotes at line 54, if it's not present )
$ make
$ su -c "make install"
$ su -c "echo /usr/local/lib > /etc/ld.so.conf.d/usrlocal.conf"
$ su -c "echo /usr/local/lib64 >> /etc/ld.so.conf.d/usrlocal.conf"
$ su -c "ldconfig"
$ su -c "ln -s /usr/local/lib/pkgconfig/htmlcxx.pc /usr/lib64/pkgconfig/htmlcxx.pc"

These building instructions are derived and adapted from the generic ones on the README.md from
lgogdownloader itself, with a slight variation (see below).
( local user: compile lgogdownloader )
$ [ -d "$HOME/sources/lgogdownloader" ] && rm -f "$HOME/sources/lgogdownloader"
$ cd "$HOME/sources"
$ git clone https://github.com/Sude-/lgogdownloader.git

$ cd "$HOME/sources/lgogdownloader"
$ [ -d build ] && rm -f build && mkdir build && cd build
$ cmake3 .. -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release

Note that the '3' of 'cmake3' is important on CentOS, otherwise you are using cmake 2.x. Do not forget to set the 
destination path to /usr/local, NOT /usr. If something goes wrong or forgot something just delete the build directory, 
enter it and re-issue the last command until there is no error.

Start compiling with

$ make

and install it to /usr/local

$ su -c "make install"

Voila, now you have your brand new lgogdownloader.

Enjoy!

Instead of building htmlcxx from source you might consider using the rpm package from here:
https://jupiterrise.com/jrpms/el7/x86_64/repoview/index.html

I just updated the package to 0.86 after coming across your guide. The package is basically just a trivial rebuild of the Fedora 28 package.