README.md: formatting updates to make it nicer + typo fixes.
Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com> Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
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@@ -1,8 +1,8 @@
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Building libmraa {#building}
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===============
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libmraa uses cmake in order to make compilation relatively painless. Cmake runs
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build out of tree so the recommended way is to clone from git and make a build/
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libmraa uses cmake in order to make compilation relatively painless. CMake runs
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build out of tree so the recommended way is to clone from git and make a `build/`
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directory inside the clone directory.
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## Build dependencies
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@@ -22,7 +22,7 @@ sudo apt-get install git build-essential swig3.0 python-dev nodejs-dev cmake
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To build the documentation you'll also need:
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* [Doxygen](http://www.stack.nl/~dimitri/doxygen/) 1.8.9.1+
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* [Graphviz](http://graphviz.org/) 2+ (For doxygen graph generation)
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* [Graphviz](http://graphviz.org/) 2+ (For Doxygen graph generation)
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* [Sphinx](http://sphinx-doc.org/) 1.1.3+ (For Python docs)
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@@ -64,66 +64,67 @@ in the path accordingly.
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## Configuration flags
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Our cmake configure has a number of options, cmake-gui or ccmake (cmake -i is
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Our CMake configuration has a number of options, `cmake-gui` or `ccmake` (`cmake -i` is
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no longer with us :() can show you all the options. A few of the more common
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ones are listed below. Note that when the option starts with CMAKE_ it's an
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option that is made available by cmake and will be similar in all cmake
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projects. You need to add them after `cmake` but before `..`.
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ones are listed below. Note that when the option starts with `CMAKE_` it's an
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option that is made available by CMake and will be similar in all CMake
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projects. You need to add them after `cmake` but before `..`
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A few recommended options:
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Changing install path from /usr/local to /usr:
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-DCMAKE_INSTALL_PREFIX:PATH=/usr
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Building debug build - adds -g and disables optimisations - this will force a
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Changing install path from `/usr/local` to `/usr`:
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`-DCMAKE_INSTALL_PREFIX:PATH=/usr`
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Building debug build - adds `-g` and disables optimisations - this will force a
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full rebuild:
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-DCMAKE_BUILD_TYPE=DEBUG
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`-DCMAKE_BUILD_TYPE=DEBUG`
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Using clang instead of gcc:
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-DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++
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Using `clang` instead of `gcc`:
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`-DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++`
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Building with an older version of SWIG (< 3.0.2) requires the disabling of javascript:
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-DBUILDSWIGNODE=OFF
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Building with an older version of SWIG (< 3.0.2) requires the disabling of JavaScript:
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`-DBUILDSWIGNODE=OFF`
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Disabling python module building:
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-DBUILDSWIGPYTHON=OFF
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Disabling Python module building:
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`-DBUILDSWIGPYTHON=OFF`
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Building doc, this will require [SPHINX](http://sphinx-doc.org) &
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[Doxygen](http://doxygen.org):
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-DBUILDDOC=ON
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`-DBUILDDOC=ON`
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Building with python3 (careful you need to clear cmake cache between python
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Building with Python 3 (careful you need to clear CMake cache between Python
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version switches!)
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-DBUILDPYTHON3=ON
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`-DBUILDPYTHON3=ON`
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Override build architecture (this is useful because on x86 arm code is not
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Override build architecture (this is useful because on x86 ARM code is not
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compiled so use this flag to force the target arch)
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-DBUILDARCH=arm
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`-DBUILDARCH=arm`
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## Dependencies continued
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You'll need at least SWIG version 3.0.2 and we recommend 3.0.5 to build the
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javascript & python modules. If your version of SWIG is older than this then
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please see above for disabling SWIGNODE. Otherwise you will get a weird build
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failure when building the javascript module. The python module builds with SWIG
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JavaScript & Python modules. If your version of SWIG is older than this then
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please see above for disabling `SWIGNODE`. Otherwise you will get a weird build
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failure when building the JavaScript module. The Python module builds with SWIG
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2.x.
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During the build, we'll assume you're building from git, note that if you
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compile with git installed your version of mraa will be tagged -dirty. This
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simply means git wasn't installed or that you where building form a tarball.
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You can modify build/src/version.c before running make if this is incorrect.
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The instructions listed here all assume that build/ is an empty dir that lives
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compile with `git` installed your version of mraa will be tagged `-dirty`. This
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simply means `git` wasn't installed or that you where building from a tarball.
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You can modify `build/src/version.c` before running `make` if this is incorrect.
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The instructions listed here all assume that `build/` is an empty dir that lives
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inside the cloned repository of mraa.
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If you have multiple versions of python then mraa can get confused, we
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recommend using virtualenv to select which version of python you want. We test
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2.7 the most but SWIG will generate valid 3.x python code but we do not
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If you have multiple versions of Python then mraa can get confused, we
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recommend using virtualenv to select which version of Python you want. We test
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2.7 the most but SWIG will generate valid 3.x Python code but we do not
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generally support building both at once.
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## Using a yocto/oe toolchain
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## Using a Yocto/OE toolchain
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In order to compile with a yocto/oe toolchain use the following toolchain file.
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This works well on the edison 1.6 SDK. First source the environment file, then
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use our cmake toolchain file.
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In order to compile with a Yocto/OE toolchain use the following toolchain file.
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This works well on the Edison 1.6 SDK. First source the environment file, then
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use our CMake toolchain file.
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~~~~~~~~~~~~~{.sh}
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source /opt/poky-edison/1.6/environment-setup-core2-32-poky-linux
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@@ -132,11 +133,11 @@ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/Toolchains/oe-sdk_cross.cmake ..
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make
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~~~~~~~~~~~~~
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## Using coverity
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## Using Coverity
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Static analysis is routinely performed using coverity on libmraa's codebase.
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This is the procedure to submit a build to coverity. You'll need to install
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coverity-submit for your OS.
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Static analysis is routinely performed using Coverity on libmraa's codebase.
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This is the procedure to submit a build to Coverity. You'll need to install
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`coverity-submit` for your OS.
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~~~~~~~~~~~~~{.sh}
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mkdir covbuild/ && cd covbuild
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@@ -146,24 +147,26 @@ tar caf mraa.tar.bz2 cov-int
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~~~~~~~~~~~~~
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## Building Java bindings
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Have JAVA_HOME set to JDK install directory. Most distributions set this from /etc/profile.d/ and have a way of switching between alternatives. We support both OpenJDK and Oracle's JDK. On Arch Linux with openjdk8 you'll have to set this yourself like this:
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Have JAVA_HOME set to JDK install directory. Most distributions set this from `/etc/profile.d/`
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and have a way of switching between alternatives. We support both OpenJDK and Oracle's JDK.
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On Arch Linux with OpenJDK 8 you'll have to set this yourself like this:
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~~~~~~~~~~~~~{.sh}
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export JAVA_HOME=/usr/lib/jvm/default/
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~~~~~~~~~~~~~
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Then use the cmake configuration flag:
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-DBUILDSWIGJAVA=ON
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To compile Example.java
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Then use the CMake configuration flag:
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`-DBUILDSWIGJAVA=ON`
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To compile `Example.java`
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~~~~~~~~~~~~~{.sh}
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javac -cp $DIR_WHERE_YOU_INSTALLED_MRAA/mraa.jar:. Example.java
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~~~~~~~~~~~~~
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To run, make sure libmraajava.so is in LD_LIBRARY_PATH
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To run, make sure `libmraajava.so` is in `LD_LIBRARY_PATH`
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~~~~~~~~~~~~~{.sh}
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jave -cp $DIR_WHERE_YOU_INSTALLED_MRAA/mraa.jar:. Example
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~~~~~~~~~~~~~
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## Building an IPK/RPM package using cpack
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## Building an IPK/RPM package using `cpack`
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You can get cpack to generate an IPK or RPM package fairly easily if you have
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You can get `cpack` to generate an IPK or RPM package fairly easily if you have
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the correct packaging tools
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~~~~~~~~~~~~~{.sh}
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@@ -171,7 +174,7 @@ cmake -DIPK=ON -DCMAKE_INSTAL_PREFIX=/usr ..
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make package
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~~~~~~~~~~~~~
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To use RPM simply enable the RPM option. You'll need rpmbuild installed on your
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To use RPM simply enable the RPM option. You'll need `rpmbuild` installed on your
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build machine.
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~~~~~~~~~~~~~{.sh}
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