Building Subsurface from Source
===============================

Subsurface uses a few open source libraries and frameworks to do its
job. The most important ones include libdivecomputer, Qt, Marble
(more precisely libmarblewidget), libxml2, libxslt, libsqlite3, libzip,
and libgit2.

Below are instructions for building Subsurface under some popular
Linux distributions, for building Subsurface using Homebrew on a Mac,
and for cross-building Subsurface for Windows. The lack of a working
package management system for Windows makes it really painful to build
Subsurface natively under Windows, we have some hints how to do so
here as well.

As of Subsurface 4.3 all of the prebuilt binaries that we provide (right
now Windows64, Windows32, Mac, Ubuntu and LinuxMint) are built using our
own custom "flavors" of libdivecomputer and libmarblewidget. You can get
these from

git://git.subsurface-divelog.org/marble (in the Subsurface-4.3 branch)
git://git.subsurface-divelog.org/libdc (in the Subsurface-4.3 branch)

Both of these repositories also have a Subsurface-testing branch. That
branch is explicitly marked as NOT STABLE and will receive force pushes.
The rationale for this is that we have no intention of forking either of
these two projects. We simply are adding a few patches on top of their
latest versions and so those testing branches get frequently rebased.

Also, all of the prebuilt binaries (with the exception of the Windows32
build) are now Qt5 based and Qt5 is considered the stable and supported
framework to use for building Subsurface.

Build options for Subsurface
----------------------------

The following options are recognized when passed to qmake:

 -config debug        Create a debug build
 -config release      Create a release build
		      The default depends on how Qt was built.
 V=1                  Disable the "silent" build mode
 LIBDCDEVEL=1         Search for libdivecomputer in ../libdivecomputer
 LIBMARBLEDEVEL=path  Search for marble library and includes in path
 SPECIAL_MARBLE_PREFIX=1 Use libssrfmarblewidget as library name
                      This is needed when building with our marble branch
 LIBGIT2DEVEL=path    Search for libgit2 library and includes in path
 INCLUDEPATH+=xxx     Add xxx to the include paths to the compiler
		      (pass the actual path, without -I)
 LIBS+=xxx            Add xxx to the linker flags. -l and -L options are
		      recognized.

The INCLUDEPATH and LIBS options are useful to tell the buildsystem
about non-standard installation paths for the dependencies (such as
Marble). They can be repeated as often as needed, or multiple
arguments can be passed on the same switch, separated by a space. For
example:

  qmake LIBS+="-L$HOME/marble/lib -L$HOME/libdivecomputer/lib" \
	INCLUDEPATH+="$HOME/marble/include $HOME/libdivecomputer/include"


Building Subsurface 4 under Linux
---------------------------------

On Fedora you need

sudo yum install git gcc-c++ make autoconf automake libtool cmake \
	libzip-devel libxml2-devel libxslt-devel libsqlite3x-devel \
	libgit2-devel libudev-devel libusbx-devel \
	qt5-qtbase-devel qt5-qtdeclarative-devel qt5-qtscript-devel \
	qt5-qtwebkit-devel qt5-qtsvg-devel qt5-qttools-devel

Package names are sadly different on OpenSUSE

sudo zypper install git gcc-c++ make autoconf automake libtool cmake libzip-devel \
	libxml2-devel libxslt-devel sqlite3-devel libgit2-devel libusb-1_0-devel \
	libqt5-linguist-devel libqt5-qttools-devel libQt5WebKitWidgets-devel \
	libqt5-qtbase-devel libQt5WebKit5-devel libqt5-qtsvg-devel \
	libqt5-qtscript-devel libqt5-qtdeclarative-devel

On Debian Jessie this seems to work

sudo apt-get install git g++ make autoconf libtool cmake pkg-config \
	libxml2-dev libxslt1-dev libzip-dev libsqlite3-dev \
	libusb-1.0-0-dev libgit2-dev \
	qt5-default qt5-qmake qtchooser qttools5-dev-tools libqt5svg5-dev \
	libqt5webkit5-dev libqt5qml5 libqt5quick5 libqt5declarative5 \
	qtscript5-dev

On Debian style distributions you can install the required development
packages by running (once Qt version of subsurface is available in your
distribution)
$ sudo apt-get build-dep subsurface
but on many of them this will give you the build dependencies for the
official package (which is often way out of date). So be careful that this
doesn't get you a Qt4 based environment


First you need to compile our version of libdivecomputer:

$ mkdir ~/src # unless you have this already
$ cd ~/src
$ git clone -b Subsurface-4.3 git://subsurface-divelog.org/libdc libdivecomputer
       # or -b Subsurface-testing to get the testing version - careful,
       #                          careful - this gets rebased and may be broken
       # -> when not building a release version of Subsurface but the
       #    latest master, it may be necessary to build against the
       #    Subsurface-testing branch

$ cd libdivecomputer
$ autoreconf --install
$ ./configure --disable-shared
$ make
$ sudo make install

Then you compile our custom branch of libmarblewidget

$ cd ~/src
$ git clone -b Subsurface-4.3 git://subsurface-divelog.org/marble marble-source
       # or -b Subsurface-testing to get the testing version - careful,
       #                          careful - this gets rebased and may be broken

$ mkdir marble-build
$ cd marble-build
$ cmake -DQTONLY=ON -DQT5BUILD=ON \
	-DBUILD_MARBLE_APPS=OFF -DBUILD_MARBLE_EXAMPLES=OFF \
	-DBUILD_MARBLE_TESTS=OFF -DBUILD_MARBLE_TOOLS=OFF \
	-DBUILD_TESTING=OFF -DWITH_DESIGNER_PLUGIN=OFF \
	-DBUILD_WITH_DBUS=OFF ../marble-source
$ make # <- this step will take quite a while... if you have more cores
       #    try make -j8 or something like that
$ sudo make install

Finally you can compile Subsurface:

$ cd ~/src
$ git clone git://subsurface-divelog.org/subsurface.git
$ cd subsurface
$ git checkout v4.3      # this get's you the last release
                         # skip this step to build the latest development
			 # version
$ qmake SPECIAL_MARBLE_PREFIX=1
# on Fedora/OpenSUSE you need qmake-qt5
$ make
$ sudo make install    # [optionally, add: prefix=/usr/local]

At least on Fedora and OpenSUSE you need to make sure that /usr/local/lib
is searched for shared libraries (this is where the steps above installed
libdivecomputer and libmarblewidget in order not to conflict with system
pacakges). So you need to do the following:

$ sudo echo "/usr/local/lib" > /etc/ld.so.conf.d/local.conf
$ sudo ldconfig

Now you should be able to start the Subsurface binary you just created
with

$ ./subsurface


Building Subsurface under MacOSX (using Homebrew)
-------------------------------------------------

0) You need to have XCode installed. The first time (and possibly after updating OSX)
you need to run

$ xcode-select --install

1)  Install Homebrew

$ ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go/install)"

2) Install needed dependencies

$ brew install asciidoc libzip sqlite cmake libusb pkg-config

3) Make the brew version of sqlite the default

$ brew link --force sqlite

4) Download Qt from http://www.qt.io/download-open-source/

In the installer, chose an install folder (e.g., /home/username/Qt5), in
"Select components" select the most recent version and be sure you also
install the "Source Components".

Build it (takes a long time)

$ cd ~/Qt5/5.4/Src/

$ ./configure -prefix /usr/local -opensource

$ make -j4

$ make install

5) Install custom subsurface Marble

$ cd ~/src
$ git clone -b Subsurface-4.3 git://subsurface-divelog.org/marble marble-source
$ cd marble-source
$ mkdir marble-build
$ cd marble-build
$ cmake -DCMAKE_BUILD_TYPE=Debug -DQTONLY=TRUE \
	-DQT5BUILD=ON -DCMAKE_INSTALL_PREFIX=/usr/local ../../marble-source
$ cd src/lib/marble
$ make -j4
$ make install

5) Install Libdivecomputer

$ brew install automake libtool
$ cd ~/src
$ git clone -b Subsurface-4.3 git://subsurface-divelog.org/libdc libdivecomputer
       # -> when not building a release version of Subsurface but the
       #    latest master, it may be necessary to build against the
       #    Subsurface-testing branch
$ cd libdivecomputer
$ autoreconf --install
$ ./configure --disable-shared
$ make -j4
$ make install


6) Compile Subsurface

$ cd ~/src
$ git clone git://subsurface-divelog.org/subsurface.git
$ cd subsurface
$ qmake SPECIAL_MARBLE_PREFIX=1 INCLUDEPATH+=/usr/local/include \
	LIBS+=-L/usr/local/lib \
	LIBS+='-L/usr/local/Cellar/libzip/0.11.2/lib -lzip -lz' \
	INCLUDEPATH+=/usr/local/Cellar/libzip/0.11.2/include V=1 \
	LIBMARBLEDEVEL=../marble-source/marble-build/
$ make -j4
$ make install_mac_bundle

After the above is done, Subsurface will be installed to /Applications.

Another option is to create a .dmg for distribution:

$ qmake
$ make
$ make mac-create-dmg


Cross-building Subsurface on Linux for Windows
----------------------------------------------

Subsurface builds nicely with MinGW - the official builds are done as
cross builds under Linux (currently on Fedora 20). A shell script to do
that (plus the .nsi file to create the installer with makensis) are
included in the packaging/windows directory.

Everywhere below the mingw64- prefix is used for the cross tools. If you
really need a 32bit binary you need to use mingw32- as prefix and you may
also run into issues creating an installable binary with Qt5 (i.e., you
may have to go back to Qt4).

The best way to get libdivecomputer to build appears to be

$ mkdir -p ~/src
$ cd ~/src
$ git clone -b Subsurface-4.3 git://subsurface-divelog.org/libdc libdivecomputer
       # or -b Subsurface-testing to get the testing version - careful,
       #                          careful - this gets rebased and may be broken
       # -> when not building a release version of Subsurface but the
       #    latest master, it may be necessary to build against the
       #    Subsurface-testing branch

$ cd libdivecomputer
$ autoreconf --install
$ mingw64-configure --disable-shared
$ mingw64-make
$ sudo mingw64-make install

To compile Marble, use:

$ cd ~/src
$ git clone -b Subsurface-4.3 git://subsurface-divelog.org/marble marble-source
       # or -b Subsurface-testing to get the testing version - careful,
       #                          careful - this gets rebased and may be broken

$ mkdir marble-build
$ cd marble-build
$ mingw64-cmake -DQTONLY=ON -DQT5BUILD=ON \
	-DBUILD_MARBLE_APPS=OFF -DBUILD_MARBLE_EXAMPLES=OFF \
	-DBUILD_MARBLE_TESTS=OFF -DBUILD_MARBLE_TOOLS=OFF \
	-DBUILD_TESTING=OFF -DWITH_DESIGNER_PLUGIN=OFF \
	-DBUILD_WITH_DBUS=OFF ../marble-source
$ mingw64-make # <- this step will take quite a while... if you have more cores
               #    try ming64-make -j8 or something like that
$ sudo mingw64-make install


To compile libgit2, use:

$ mkdir -p ~/src/libgit2/build
$ git clone git://github.com/libgit2/libgit2 ~/src/libgit2
$ cd ~/src/libgit2/build
$ mingw64-cmake ..
$ mingw64-make
$ sudo mingw64-make install

To compile Subsurface, use:

$ cd ~/src
$ git clone git://subsurface-divelog.org/subsurface.git
$ cd subsurface
$ cd git checkout v4.3   # this get's you the last release
                         # skip this step to build the latest development
			 # version
$ packagin/windows/mingw-make.sh Qt5 SPECIAL_MARBLE_PREFIX=1
$ packaging/windows/mingw-make.sh install
$ packaging/windows/mingw-make.sh installer

The last step assumes that you have a link from packaging/windows/dll to
the correct directory in your MinGW installation. On my machine that is
/usr/i686-w64-mingw64/sys-root/mingw/bin
Similarly, the paths used in packaging/windows/mingw-make.sh may need to
be adjusted according to your distributions layout

Also, at least one version of Qt DLLs shipping with Fedora was
self-inconsistent at caused random crashes at startup. Unless you have
good reasons to build your own binaries, on Windows you may be better off
with the pre-compiled binaries we provide.


Building Subsurface on Windows
------------------------------

This is NOT RECOMMENDED. To the best of our knowledge there is one single
person who regularly does this (and he provided these instructions). The
Subsurface team does not provide support for Windows binary build from
sources...

1) Install msys-git:
http://msysgit.github.io

Tools part of MSYS are required for building Subsurface, while you also
need Git to be upstream and contribute to the project.
Make sure that the msys/bin (or git/bin) folder is in PATH.

2) Install Qt
http://qt-project.org/downloads

Subsurface is currently built against Qt 4.8.5.

3) Install a MinGW toolchain
https://docs.google.com/open?id=0B4D8x6CJEmtuczdiQklwMEs4RUU

Qt 4.8.5 comes without a compiler and you will have to download it from
a separate location. Other compiler may work, but there are no guaranties for
that. Make sure that the mingw/bin folder is in PATH.

4) Install Libdivecomputer
Use similar steps to the previous section, without the sudo command.

5) Install CMake (required for building Marble):
http://www.cmake.org/cmake/resources/software.html

Make sure that the cmake/bin folder is in PATH.

5) Download and build Marble
http://marble.kde.org/sources.php
http://techbase.kde.org/Projects/Marble/WindowsCompiling#Compiling_Marble_using_MingW

Make sure you build both the Debug and Release versions.

6) Install pkg-config
http://ftp.gnome.org/pub/gnome/binaries/win32/dependencies/pkg-config_0.26-1_win32.zip

pkg-config depends on DLL files such as libglib-2.0-0.dll and has to be in
PATH, so it's best that you copy the executable to msys/bin.

7) Install other dependencies
Subsurface also depends on the following libraries:

* libxml2
http://www.xmlsoft.org/downloads.html
* libxslt
http://xmlsoft.org/XSLT/
* libusb-1.0
http://sourceforge.net/apps/trac/libusb-win32/wiki
* zlib
http://www.zlib.net/
* libzip
http://www.nih.at/libzip/

Once you have the libraries, create .pc files (pkg-config) for them and place
the files in a folder that is indicated by the PKG_CONFIG_PATH environment
variable - e.g. PKG_CONFIG_PATH=c:\msys\pkg-config

To build subsurface, use:

$ git clone git://subsurface-divelog.org/subsurface.git
$ cd subsurface
$ qmake
$ make
$ make install
$ make installer
