[mythtv] noob to MythTV development
roger at beardandsandals.co.uk
Wed Mar 15 12:35:46 UTC 2017
Ok some typos corrected in this version.
I agree that the learning curve for eclipse is steep. However if you follow
some simple rules you can bypass most of the curve and get a fully
integrated IDE with compiling, source debugging, and much more. The steps
below work on Ubuntu but should work on any linux distro.
1. Download the Eclipse CDT Neon (or later) installer from eclipse.org. You
need Neon or later for debugging to work properly.
2. Do not set up your eclipse workspace directory anywhere where above your
Mythtv source code directory. i.e. Do not have the myth source in any
subdirectory of the eclipse workspace directory. This is important!
3. Configure and build the Mythtv code in the normal way from the command
line. i.e. ./configure --compile-type=debug; make. This is also an
important step and must be done before you try to create an eclipse project.
4. Launch eclipse. Select File - New - Makefile Project with Existing Code.
For Existing code location choose the directory where you have just run
configure and created a Makefile.
5. When the process finishes and the c++ indexer has run, then try a build.
At this point I suggest you change the default make command to suit your
system. For my quad core system I use "make -j8". To do this select Project
- Properties. On the property dialogue select C/C++ Build and uncheck the
Use default build command box, type your new build command into the box
below. Remember to OK all the way out. Then select Project - Build All.
Check the console tab to see if the build runs OK.
To avoid problems with debugging and running from within the ide. Go to the
run menu and create a new debug launch configuration for each myth program
you want to debug. Select C/C++ application as the launch template and
press the new launch configuration button just above. In the main tab
browse to the project name just just created and select that. For the C/C++
application box, select browse project and browse to the executable you
want to run. For example for mythbackend you should end up with
programs/mythbackend/mythbackend in the box. After you have done this go to
the environment variables tab and create a new LD_PRELOAD environment
variable and set it to this.
These are all on a single line separated by single spaces (you can use
colons if you prefer).
Finally go to the source code tab and check that it looks like this.
Absolute File Path
Program Relative File Path
name_of_a_directory_in_mythtv_source_top - /name_of_your_project
... more directories in the top of your source tree.
If it does not look like this then something has gone wrong and you should
clean out the .settings directory and the .project and .cproject files from
the project top directory (should be where you ran configure), and clean
out your project and launch related stuff from the eclipse workspace
directory (the easiest way to do this is delete everything including hidden
files and directories from this directory). After that the first thing to
check is that you really followed step 2. of the above. I have wasted many
hours trying to replicate what eclipse puts under that default entry
without success. If you end up with an empty default source path container,
you really need to start over. Once you get into a situation where restore
default on the sources tab gives you an empty container there is no way back.
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