CMake toolchain file for building OpenSceneGraph with a cross compiler toolchain

toolchain-arm-cortexa9_neon-linux-gnueabihf.cmake

SET(CMAKE_SYSTEM_NAME Linux)

SET(CMAKE_SYSROOT /path/to/rootfs)

#debian dependencies required for building:
# libpthread-stubs0-dev_0.3-2_armel.deb
# libx11-6_1.3.3-4+squeeze1_armel.deb
# libx11-dev_1.3.3-4+squeeze1_armel.deb
# libxau-dev_1.0.6-1_armel.deb
# libxcb1_1.6-1+squeeze1_armel.deb
# libxcb1-dev_1.6-1+squeeze1_armel.deb
# libxdmcp-dev_1.0.3-2_armel.deb
# libxrandr2_1.3.0-3+squeeze1_armel.deb
# libxrandr2_1.3.0-3+squeeze1_armel.deb.1
# libxrandr-dev_1.3.0-3+squeeze1_armel.deb
# libxrender-dev_0.9.6-1+squeeze1_armel.deb
# x11-common_7.5+8+squeeze1_all.deb
# x11proto-core-dev_7.0.16-1_all.deb
# x11proto-input-dev_2.0-2_all.deb
# x11proto-kb-dev_1.0.4-1_all.deb
# x11proto-randr-dev_1.3.1-1_all.deb
# x11proto-render-dev_0.11-1_all.deb
# xtrans-dev_1.2.5-1_all.deb

SET(CMAKE_C_COMPILER /path/to/cross-compiler-root/bin/arm-cortexa9_neon-linux-gnueabihf-gcc)
SET(CMAKE_CXX_COMPILER /path/to/cross-compiler-root/bin/arm-cortexa9_neon-linux-gnueabihf-g++)

SET(CMAKE_FIND_ROOT_PATH /path/to/cross-compiler-root /path/to/rootfs)

SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)

#ARM Vivante GPU headers require LINUX and EGL_API_FB to be defined to correctly detect the target platform

SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -U_FORTIFY_SOURCE -DLINUX=1 -DEGL_API_FB=1" CACHE STRING "")
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -U_FORTIFY_SOURCE -DLINUX=1 -DEGL_API_FB=1" CACHE STRING "")

#CMAKE command used to configure (Change OPENGL_PROFILE=GLES1 for OpenGL ES1 build)
#
# cmake -DCMAKE_TOOLCHAIN_FILE=../../toolchain-arm-cortexa9_neon-linux-gnueabihf.cmake -DOPENGL_PROFILE=GLES2 -DDYNAMIC_OPENTHREADS=OFF -DDYNAMIC_OPENSCENEGRAPH=OFF -DOPENGL_INCLUDE_DIR=../../debian_rootfs/usr/include -D_OPENTHREADS_ATOMIC_USE_GCC_BUILTINS_EXITCODE:BOOL=OFF -DBUILD_OSG_APPLICATIONS:BOOL=OFF ../osg-master/