path: root/doc/texi/building/chapter.via.terminal.texi

@anchor{terminal}
@chapter Building via Terminal

@c %**-------------------------------------------------------------------------
@anchor{terminal.checkout}
@section Checkout Sources
@include building/method.checkout.texi

@c %**-------------------------------------------------------------------------
@anchor{terminal.configure}
@section Configure
Configure the build system.

@example
rm -fr build/
mkdir build/
cd build/
../configure
@end example

Create a scratch directory which will contain all files created during the build process. The directory name is arbitrary but we recommend something simple and descriptive. One directory is required for each distinctly configured build. We name our directory @file{build} for example purposes.

The @command{configure} utility accepts many options. It is recommended that you specify @command{--help} for the complete list of options. The following options are also documented here:

@table @samp
@item --help
List available options.

@item --prefix=PREFIX
Specify destination directory for final product install.
This defaults to a reasonable platform-specific value.

@item --disable-xcode
Disable driving the build through Xcode. If this option is disabled only @command{HandBrakeCLI} will be produced and Xcode will not be invoked. @value{OS.osx} only.

@item --disable-gtk
Disable building the GTK GUI on applicable platforms such as @value{OS.linux}.

@item --debug=MODE
Select debug mode. Must be one of @samp{none}, @samp{min}, @samp{std}, @samp{max}.
This generally maps to gcc options @samp{-g0}, @samp{-g1}, @samp{-g2}, @samp{-g3}.

@item --optimize=MODE
Select optimize mode. Must be one of @samp{none}, @samp{speed}, @samp{size}.
This generally maps to gcc options @samp{-g0}, @samp{-O0}, @samp{-O3}, @samp{-Os}.

@item --arch=MODE
Select build architecture. The available architectures vary by platform. Most platforms support exactly one architecture except @value{OS.osx} which has support for various universal binary architectures. The available choices are hard-coded per platform and no sanity checks for the required tools are performed.

@item --gcc=EXE
Specify the @command{gcc} executable to use where @b{EXE} is the executable name which is either absolute or environment @samp{PATH} is searched accordingly.
@end table

Clean-room procedures dictate that when certain factors change, old builds should be scrapped and new builds configured. This is the main reason for requiring a scratch directory; to promote consistent, reliable and clean software builds. The following is a short list of some of the reasons why someone may choose to scrap an existing build:

@itemize
@item configure with different options
@item subversion working dir is updated and you want configure to re-evaluate working dir metadata.
@item build corruption is suspected
@end itemize

There are generally two methods for scrapping a build. The @file{build} directory can be recusrively removed which has the effect of loosing your existing configuration but does guarantee no residuals are left behind. The other method is to ask the build system to perform an @command{make xclean}. This is known to work well but will leave empty directories behind. However, the configuration is left intact.

@c %**-------------------------------------------------------------------------
@anchor{terminal.build}
@section Build
Build main product. All necessary dependencies are also built if required.

@example
make
@end example

Parallel builds may optionally be enabled. Be aware that while a parallel build may save time on systems with additional cores, the output is often mixed, overlapped and sometimes even corrupted with binary characters. Thus if you experience a build issue, you should clean and redo the build in default serial mode to produce a readable log. The following command allows for up to 4 concurrent jobs via make:

@example
make -j4
@end example

@c %**-------------------------------------------------------------------------
@anchor{terminal.targets}
@section Make Targets

The build system supports passing many kinds of targets some of which become very useful in normal development cycles. The targets by convention are lower-case words passed to @command{make}. Global targets are one-word targets. Scoped targets are usually two-words seperated by a period.

@anchor{terminal.targets.global}
@subsection Global

@table @samp
@item make
Alias for @samp{make build}.

@item make build
Build main product. All necessary dependencies are also built if required.

@item make clean
Clean all build output excluding contrib modules. Configuration is retained.

@item make install
Perform final product(s) install.
This will install build products to a standard directory or one specified via @command{configure --prefix} option.

@item make uninstall
Perform final product(s) uninstall.
This will uninstall any products which may have been previously installed.

@item make xclean
Clean all build output including contrib modules. Configuration is retained.

@item make doc
Build auto-generated project documentation. Various articles are produced and may be found in @file{build/doc/articles}.

@item make report.help
Print list of available makefile vars report targets.
These reports detail var definitions and expanded values used by the build system.
@b{For experts only}.

@item make report.all
Convenience target which aggregates all reports.
@b{For experts only}.
@end table

@anchor{terminal.targets.general}
@subsection General Modules

General modules such as @samp{libhb}, @samp{test} and @samp{gtk} have the following scoped targets:

@table @samp
@item make @i{MODULE}.build
Build @i{MODULE}.

@item make @i{MODULE}.clean
Clean build output for @i{MODULE}.
@end table

@anchor{terminal.targets.contrib}
@subsection Contrib Modules

Contrib modules such as @samp{a52dec}, @samp{bzip2}, @samp{faac}, @samp{faad2}, @samp{ffmpeg}, @samp{lame}, @samp{libdca}, @samp{libdvdread}, @samp{libmkv}, @samp{libmp4v2}, @samp{libogg}, @samp{libsamplerate}, @samp{libtheora}, @samp{libvorbis}, @samp{mpeg2dec}, @samp{x264}, @samp{xvidcore} and @samp{zlib} have the following scoped targets:

@table @samp
@item make @i{MODULE}.fetch
Download source tarball from the Internet and save to @file{TOP/downloads} directory. No checksumming is performed.

@item make @i{MODULE}.extract
Extract source tarball into @file{build} tree.

@item make @i{MODULE}.patch
Apply appropriate patches (if any) to module sources.

@item make @i{MODULE}.configure
Configure module sources.
This usually invokes autotool configure.

@item make @i{MODULE}.build
Build module.
This usually invokes autotool build.

@item make @i{MODULE}.install
Install module products such as headers and libraries into @file{build} tree.
This usually invokes autotool install.

@item make @i{MODULE}.uninstall
Uninstall module products; generally the reverse of install.
This usually invokes autotool uninstall.

@item make @i{MODULE}.clean
Clean module; generally the reverse of build.
This usually invokes autotool clean.

@item make @i{MODULE}.xclean
Extra clean module; first invokes uninstall then recursively removes the module build directory.
@end table

@anchor{terminal.targets.contrib.touch}
@subsection Contrib Touch and Untouch
Also available are some very granular targets which help force builds from specific cycle points. The following targets are available to touch and untouch the respective module target; this will force the build system to treat the target as satisfied after a touch or unsatisfied after an untouch:

@itemize
@item make @i{MODULE}.extract.touch
@item make @i{MODULE}.extract.untouch
@item make @i{MODULE}.patch.touch
@item make @i{MODULE}.patch.untouch
@item make @i{MODULE}.configure.touch
@item make @i{MODULE}.configure.untouch
@item make @i{MODULE}.build.touch
@item make @i{MODULE}.build.untouch
@item make @i{MODULE}.install.touch
@item make @i{MODULE}.install.untouch
@end itemize

@anchor{terminal.targets.contrib.aggregate}
@subsection Contrib Aggregates
For convenience, the following targets aggregate the all contrib modules' respective targets together:

@itemize
@item make contrib.fetch
@item make contrib.extract
@item make contrib.patch
@item make contrib.configure
@item make contrib.build
@item make contrib.install
@item make contrib.uninstall
@item make contrib.clean
@item make contrib.xclean
@end itemize

@c %**-------------------------------------------------------------------------
@anchor{terminal.customizing}
@section Customizing Make
If the need arises to override settings in the build system (essentially gnu-make variables) the recommended method is to create/edit the optional include file @file{build/GNUmakefile.custom} which sits adjacent to the top-level makefile. @b{Do not check this file into the respository}. The sole purpose is to allow a place to store local build settings for testing, tweaking, and experimenting with build configuration without losing your settings if @command{configure} is invoked; ie: @command{configure} would overwrite @file{GNUmakefile} and any customizations contained therein would be lost. Here is a short example of what the contents of @file{build/GNUmakefile.custom} might contain:

@example
## bump to gcc-4.2 in current path
GCC.gcc = gcc-4.2

## replace optimize for 'speed' with more agressive settings
GCC.args.O.speed = -O3 -fomit-frame-pointer -msse4.2
@end example

See also @command{make report.help} which displays a set of reports used to dump makefile vars.