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Added possibility to cross compile project from host linux machine #6

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21 changes: 17 additions & 4 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -4,18 +4,31 @@ project ("openGLES 2.0 for Raspberry Pi tutorials")

SET(COMPILE_DEFINITIONS -Werror)

if (CROSS_COMPILE)
message("Cross compilation mode enabled.")

# Some cmake systems has bug, and uses install rpath
# always, even while building
# (CMAKE_BUILD_RPATH is always equal to CMAKE_INSTALL_RPATH).
# In cross-compilation case such rpath would be wrong.
# E.g. we don't need rpath=/opt/vc/lib
# but we need rpath=${ROOTFS}/opt/vc/lib
# Currently the we just hardcode that linker flag.
SET(CMAKE_EXE_LINKER_FLAGS "-Wl,-rpath,${CMAKE_SOURCE_DIR}/libs/ilclient:${CMAKE_SYSROOT}/opt/vc/lib")
endif(CROSS_COMPILE)

include_directories(
/opt/vc/include
/opt/vc/include/interface/vcos/pthreads
/opt/vc/include/interface/vmcs_host/linux
${CMAKE_SYSROOT}/opt/vc/include
${CMAKE_SYSROOT}/opt/vc/include/interface/vcos/pthreads
${CMAKE_SYSROOT}/opt/vc/include/interface/vmcs_host/linux
# ${CMAKE_SOURCE_DIR}/libs/glm/
${CMAKE_SOURCE_DIR}/libs/ilclient
${CMAKE_SOURCE_DIR}/common
)

link_directories(
${CMAKE_SOURCE_DIR}/libs/ilclient
/opt/vc/lib
${CMAKE_SYSROOT}/opt/vc/lib
)


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4 changes: 3 additions & 1 deletion encode_OGL/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -12,5 +12,7 @@ target_link_libraries(encode_OGL
${GL_LIBS}
${CAM_LIBS}
${ILC_LIBS}
m
pthread
)
set (CMAKE_C_FLAGS "-DOMX_SKIP64BIT -lpthread -lm")
set (CMAKE_C_FLAGS "-DOMX_SKIP64BIT")
36 changes: 36 additions & 0 deletions raspberry-toolchain.cmake
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Original file line number Diff line number Diff line change
@@ -0,0 +1,36 @@
SET(CMAKE_SYSTEM_NAME Linux)
SET(CMAKE_SYSTEM_VERSION 1)

# Setup rootfs directory here
SET(PIROOT /home/stepan/projects/alpha_racing/raspberry-rootfs/rootfs)

# Directory to raspberry cross compiling tools
SET(PITOOLS /opt/tools)

SET(TOOLROOT ${PITOOLS}/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64)

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

SET(CMAKE_SYSROOT ${PIROOT})
SET(CMAKE_FIND_ROOT_PATH ${PIROOT})


# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)


# Some cmake systems has bug, and uses install rpath
# always, even while building.
# In cross-compilation case such rpath would be wrong.
# E.g. we don't need rpath=/opt/vc/lib
# but we need rpath=${ROOTFS}/opt/vc/lib
# Currently we should hardcode that linker flag in project CMakeLists.txt
SET(CMAKE_SKIP_BUILD_RPATH True)

set(CROSS_COMPILE True)