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gerrit-public.fairphone.software / platform / external / libkmsxx / 07c6c86874fef1e4aeccd37dc62cc009ba7212b8
commit07c6c86874fef1e4aeccd37dc62cc009ba7212b8[log] [tgz]
authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>Mon Sep 19 14:38:16 2016 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>Wed Sep 28 10:14:07 2016 +0300
treec79906daa4a4054a0be2b85442d782179d09ad9a
parentf093a5529cc925e18104e62764e209358c7a4ec2 [diff]
Fix LTO detection

Catch gcc-ar and gcc-ranlib versions compiled without plugin support and
disable LTO in that case.

Also do the LTO check only once by checking if HAS_LTO_FLAG has been set.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
1 file changed
tree: c79906daa4a4054a0be2b85442d782179d09ad9a
  1. ext/
  2. kms++/
  3. kms++util/
  4. kmscube/
  5. py/
  6. utils/
  7. .gitignore
  8. .gitmodules
  9. CMakeLists.txt
  10. LICENSE
  11. README.md
  12. TODO
README.md

kms++ - C++ library for kernel mode setting

kms++ is a C++11 library for kernel mode setting.

Also included are some simple utilities for KMS and python bindings for kms++.

Utilities

  • kmstest - set modes and planes and show test pattern on crtcs/planes, and test page flips
  • kmsprint - print information about DRM objects
  • kmsview - view raw images
  • kmscube - rotating 3D cube on crtcs/planes
  • kmscapture - show captured frames from a camera on screen

Dependencies:

  • libdrm
  • Python 3.x (for python bindings)

Build instructions:

To build the Python bindings you need to set up the git-submodule for pybind11:

git submodule update --init

And to compile:

$ mkdir build
$ cd build
$ cmake ..
$ make -j4

Cross compiling instructions:

Directions for cross compiling depend on your environment.

These are for mine with buildroot:

$ mkdir build
$ cd build
$ cmake -DCMAKE_TOOLCHAIN_FILE=<buildrootpath>/output/host/usr/share/buildroot/toolchainfile.cmake ..
$ make -j4

Your environment may provide similar toolchainfile. If not, you can create a toolchainfile of your own, something along these lines:

SET(CMAKE_SYSTEM_NAME Linux)

SET(BROOT "<buildroot>/output/")

# specify the cross compiler
SET(CMAKE_C_COMPILER   ${BROOT}/host/usr/bin/arm-buildroot-linux-gnueabihf-gcc)
SET(CMAKE_CXX_COMPILER ${BROOT}/host/usr/bin/arm-buildroot-linux-gnueabihf-g++)

# where is the target environment
SET(CMAKE_FIND_ROOT_PATH ${BROOT}/target ${BROOT}/host)

SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

Build options

You can use the following cmake flags to control the build. Use -DFLAG=VALUE to set them.

Option nameValuesDefaultNotes
CMAKE_BUILD_TYPERelease/DebugRelease
BUILD_SHARED_LIBSON/OFFOFF
KMSXX_ENABLE_PYTHONON/OFFON
KMSXX_ENABLE_KMSCUBE  ON/OFFOFF

Env variables

You can use the following runtime environmental variables to control the behavior of kms++.

VariableDescription
KMSXX_DISABLE_UNIVERSAL_PLANESSet to disable the use of universal planes
KMSXX_DISABLE_ATOMICSet to disable the use of atomic modesetting