include(CMakeForceCompiler)

set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_VERSION 1)
set(CMAKE_SYSTEM_PROCESSOR arm)

set(CMAKE_SIZEOF_VOID_P 32)
set(GENERIC 1)
set(TI_TDA2XX_ARM_A15 1)

set(GCC_COMPILER_VERSION "4.7" CACHE STRING "GCC Compiler version")

set(FLOAT_ABI_SUFFIX "")

set(ARM_NONE_SYSROOT /opt/ti/ccsv5/tools/compiler/gcc-arm-none-eabi-4_7-2012q4${FLOAT_ABI_SUFFIX} CACHE PATH "ARM cross compilation system root")

set(CMAKE_LINKER "${ARM_NONE_SYSROOT}/bin/arm-none-eabi-ld" CACHE PATH "linker")
set(CMAKE_AR "${ARM_NONE_SYSROOT}/bin/arm-none-eabi-ar" CACHE PATH "archiver")
#set(CMAKE_C_COMPILER "${ARM_NONE_SYSROOT}/bin/arm-none-eabi-gcc" CACHE PATH "C compiler")
#set(CMAKE_CXX_COMPILER "${ARM_NONE_SYSROOT}/bin/arm-none-eabi-g++" CACHE PATH "C++ compiler")

cmake_force_c_compiler(${ARM_NONE_SYSROOT}/bin/arm-none-eabi-gcc GNU)
cmake_force_cxx_compiler(${ARM_NONE_SYSROOT}/bin/arm-none-eabi-g++ GNU)

##########################################################################
#                   Cmake C and CXX flags                                #
##########################################################################

set(CMAKE_CXX_FLAGS           "-DGENERIC_ARM -DGENERIC -D_POSIX_THREADS -O3"                    CACHE STRING "c++ flags")
set(CMAKE_C_FLAGS             "-DGENERIC_ARM -DGENERIC -D_POSIX_THREADS -O3"                    CACHE STRING "c flags")

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcpu=cortex-a15 -mtune=cortex-a15 -mfpu=neon -mfloat-abi=hard -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi")
set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -mcpu=cortex-a15 -mtune=cortex-a15 -mfpu=neon -mfloat-abi=hard -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi")

##########################################################################
#                       Cmake linker flags                               #
##########################################################################

set(CMAKE_SHARED_LINKER_FLAGS "--specs=rdimon.specs -lgcc -lc -lm -lgloss-linux -lrdimon -lnosys"                    CACHE STRING "shared linker flags")
set(CMAKE_MODULE_LINKER_FLAGS "--specs=rdimon.specs -lgcc -lc -lm -lgloss-linux -lrdimon  -lnosys"                    CACHE STRING "module linker flags")
set(CMAKE_EXE_LINKER_FLAGS    "--specs=rdimon.specs -lgcc -lc -lm -lgloss-linux -lrdimon  -lnosys -Wl,-z,nocopyreloc"  CACHE STRING "executable linker flags")

set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${CMAKE_SHARED_LINKER_FLAGS}")
set(CMAKE_MODULE_LINKER_FLAGS "-Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${CMAKE_MODULE_LINKER_FLAGS}")
set(CMAKE_EXE_LINKER_FLAGS    "-Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${CMAKE_EXE_LINKER_FLAGS}")


if(USE_NEON)
  message(WARNING "You use obsolete variable USE_NEON to enable NEON instruction set. Use -DENABLE_NEON=ON instead." )
  set(ENABLE_NEON TRUE)
elseif(USE_VFPV3)
  message(WARNING "You use obsolete variable USE_VFPV3 to enable VFPV3 instruction set. Use -DENABLE_VFPV3=ON instead." )
  set(ENABLE_VFPV3 TRUE)
endif()

set(CMAKE_FIND_ROOT_PATH ${CMAKE_FIND_ROOT_PATH} ${ARM_NONE_SYSROOT})

if(EXISTS ${CUDA_TOOLKIT_ROOT_DIR})
    set(CMAKE_FIND_ROOT_PATH ${CMAKE_FIND_ROOT_PATH} ${CUDA_TOOLKIT_ROOT_DIR})
endif()

set( CMAKE_SKIP_RPATH TRUE CACHE BOOL "If set, runtime paths are not added when using shared libraries." )
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)

# macro to find programs on the host OS
macro( find_host_program )
 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER )
 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER )
 if( CMAKE_HOST_WIN32 )
  SET( WIN32 1 )
  SET( UNIX )
 elseif( CMAKE_HOST_APPLE )
  SET( APPLE 1 )
  SET( UNIX )
 endif()
 find_program( ${ARGN} )
 SET( WIN32 )
 SET( APPLE )
 SET( UNIX 1 )
 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
endmacro()

# macro to find packages on the host OS
macro( find_host_package )
 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER )
 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER )
 if( CMAKE_HOST_WIN32 )
  SET( WIN32 1 )
  SET( UNIX )
 elseif( CMAKE_HOST_APPLE )
  SET( APPLE 1 )
  SET( UNIX )
 endif()
 find_package( ${ARGN} )
 SET( WIN32 )
 SET( APPLE )
 SET( UNIX 1 )
 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
endmacro()