This is ほたるび (Hotarubi), a hobby OS developed from scratch just for the sake of it.
The development started in August 2014 and is ongoing.
Depending on how things work out there may one day be more sources like
userspace or even ports of existing software here.
For now it's just the sources required to build the kernel itself.
Unless otherwise stated all files are licensed under the GNU GPL version 3 or,
at your oppinion any later version (see COPYING for details).
Refer to the license headers in individual files for different / additional licensing terms.
Some files, for example parts of the build system, may not contain explicit licensing headers.
In this case the files should be considered to be licensed as stated in COPYING.
(These files are mostly in-development code which I consider unstable or that I'm currently
working on.)
ほたるび uses Rake as the build system of choice.
In addition to that a working C/C++ compiler is required to build the needed tools.
All recent versions of GCC 4.7 or newer should work.
For builds on OS X systems the clang compiler that is installed along with XCode
or as part of the Commandline Developer Tools will do just fine.
Building the kernel requires a GCC based toolchain targeting x86_64-elf.
This source tree includes some patches to the stock GCC to be able to use libgcc
and a few other builtin features for free.
To download, patch and build the toolchain run:
rake toolchain:build
After building the toolchain temporary files can be removed with:
rake toolchain:clean
This will delete the archives, extracted sources and build trees.
After having the toolchain in-place the kernel can be build with a simple rake call.
Use rake clean to remove any intermediate build results or rake clobber to remove all binaries and
intermediate files.
Some parts of ほたるび can be tested offline without having to build and run the complete kernel. To provide a robust test suite the source tree contains a fused copy of the Google Test Framework (gtest).
gtest is released under the New BSD License - see scripts/test/gtest/LICENSE for details.
Local tests can be build and run by executing:
rake test:offline
Additionally there is a special target to clean only the test executables:
rake test:clean
(this is also part of the regular rake clean task.)