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      1 # Platform defines.
      2 set(CMAKE_SYSTEM_NAME Linux)
      3 
      4 set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS TRUE)
      5 
      6 set(CMAKE_CROSSCOMPILING 1)
      7 
      8 # NDK installation path
      9 if (NOT DEFINED ANDROID_NDK_PATH)
     10 	message(FATAL_ERROR "Please provide ANDROID_NDK_PATH")
     11 endif ()
     12 
     13 # Host os (for toolchain binaries)
     14 if (NOT DEFINED ANDROID_NDK_HOST_OS)
     15 	message(STATUS "Warning: ANDROID_NDK_HOST_OS is not set")
     16 	if (WIN32)
     17 		set(ANDROID_NDK_HOST_OS "windows")
     18 	elseif (UNIX)
     19 		set(ANDROID_NDK_HOST_OS "linux-86")
     20 	endif ()
     21 endif ()
     22 
     23 # Compile target
     24 set(ANDROID_ABI			"armeabi-v7a"			CACHE STRING "Android ABI")
     25 set(ANDROID_NDK_TARGET	"android-${DE_ANDROID_API}")
     26 
     27 # dE defines
     28 set(DE_OS		"DE_OS_ANDROID")
     29 set(DE_COMPILER	"DE_COMPILER_CLANG")
     30 if (NOT DEFINED DE_ANDROID_API)
     31 	set(DE_ANDROID_API 5)
     32 endif ()
     33 
     34 # Select cpu
     35 if (ANDROID_ABI STREQUAL "x86")
     36 	set(DE_CPU					"DE_CPU_X86")
     37 	set(CMAKE_SYSTEM_PROCESSOR	i686-android-linux)
     38 else ()
     39 	set(DE_CPU					"DE_CPU_ARM")
     40 	set(CMAKE_SYSTEM_PROCESSOR	arm-linux-androideabi)
     41 endif ()
     42 
     43 # Path to LLVM
     44 set(LLVM_PATH	"${ANDROID_NDK_PATH}/toolchains/llvm-3.4/prebuilt/${ANDROID_NDK_HOST_OS}/")
     45 
     46 # Cross-compiler, search paths and sysroot
     47 if (ANDROID_ABI STREQUAL "x86")
     48 	set(ANDROID_CC_PATH	"${ANDROID_NDK_PATH}/toolchains/x86-4.8/prebuilt/${ANDROID_NDK_HOST_OS}/")
     49 	set(CROSS_COMPILE	"${ANDROID_CC_PATH}bin/i686-linux-android-")
     50 	set(ANDROID_SYSROOT	"${ANDROID_NDK_PATH}/platforms/${ANDROID_NDK_TARGET}/arch-x86")
     51 
     52 	set(CMAKE_FIND_ROOT_PATH
     53 		"${ANDROID_NDK_PATH}/sources/cxx-stl/gnu-libstdc++/4.8/libs/${ANDROID_ABI}"
     54 		"${ANDROID_CC_PATH}i686-linux-android"
     55 		"${ANDROID_CC_PATH}lib/gcc/i686-linux-android/4.8"
     56 		${ANDROID_SYSROOT}
     57 		)
     58 
     59 else ()
     60 	set(ANDROID_CC_PATH	"${ANDROID_NDK_PATH}/toolchains/arm-linux-androideabi-4.8/prebuilt/${ANDROID_NDK_HOST_OS}/")
     61 	set(CROSS_COMPILE	"${ANDROID_CC_PATH}bin/arm-linux-androideabi-")
     62 	set(ANDROID_SYSROOT	"${ANDROID_NDK_PATH}/platforms/${ANDROID_NDK_TARGET}/arch-arm")
     63 
     64 	set(CMAKE_FIND_ROOT_PATH
     65 		"${ANDROID_NDK_PATH}/sources/cxx-stl/gnu-libstdc++/4.8/libs/${ANDROID_ABI}"
     66 		"${ANDROID_CC_PATH}arm-linux-androideabi"
     67 		${ANDROID_SYSROOT}
     68 		)
     69 
     70 endif ()
     71 
     72 # crtbegin_so.o & crtend_so.o \todo [pyry] Is there some special CMake variable for these?
     73 if (DE_ANDROID_API GREATER 8)
     74 	set(CRTBEGIN_SO	"${ANDROID_SYSROOT}/usr/lib/crtbegin_so.o")
     75 	set(CRTEND_SO	"${ANDROID_SYSROOT}/usr/lib/crtend_so.o")
     76 endif ()
     77 
     78 # libgcc
     79 if (ANDROID_ABI STREQUAL "armeabi-v7a")
     80 	set(LIBGCC "${ANDROID_CC_PATH}lib/gcc/arm-linux-androideabi/4.8/armv7-a/libgcc.a")
     81 elseif (ANDROID_ABI STREQUAL "armeabi")
     82 	set(LIBGCC "${ANDROID_CC_PATH}lib/gcc/arm-linux-androideabi/4.8/libgcc.a")
     83 elseif (ANDROID_ABI STREQUAL "x86")
     84 	set(LIBGCC "${ANDROID_CC_PATH}lib/gcc/i686-linux-android/4.8/libgcc.a")
     85 else ()
     86 	message(FATAL_ERROR "Don't know where libgcc.a is")
     87 endif ()
     88 
     89 # C++ library
     90 set(LIBCPP "${ANDROID_NDK_PATH}/sources/cxx-stl/gnu-libstdc++/4.8/libs/${ANDROID_ABI}/libgnustl_static.a")
     91 
     92 include(CMakeForceCompiler)
     93 
     94 # Compiler binaries
     95 if (ANDROID_NDK_HOST_OS STREQUAL "linux-x86" OR
     96 	ANDROID_NDK_HOST_OS STREQUAL "linux-x86_64" OR
     97 	ANDROID_NDK_HOST_OS STREQUAL "darwin-x86")
     98 	cmake_force_c_compiler("${LLVM_PATH}bin/clang"			Clang)
     99 	cmake_force_cxx_compiler("${LLVM_PATH}bin/clang++"		Clang)
    100 	set(CMAKE_AR "${CROSS_COMPILE}ar" CACHE FILEPATH "Archiver")
    101 elseif (ANDROID_NDK_HOST_OS STREQUAL "windows")
    102 	cmake_force_c_compiler("${LLVM_PATH}bin/clang.exe"		Clang)
    103 	cmake_force_cxx_compiler("${LLVM_PATH}bin/clang++.exe"	Clang)
    104 	set(CMAKE_AR "${CROSS_COMPILE}ar.exe" CACHE FILEPATH "Archiver")
    105 else ()
    106 	message(FATAL_ERROR "Unknown ANDROID_NDK_HOST_OS")
    107 endif ()
    108 
    109 set(CMAKE_SHARED_LIBRARY_C_FLAGS	"")
    110 set(CMAKE_SHARED_LIBRARY_CXX_FLAGS	"")
    111 
    112 
    113 set(CMAKE_C_CREATE_SHARED_LIBRARY	"<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
    114 set(CMAKE_CXX_CREATE_SHARED_LIBRARY	"<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> -o <TARGET> ${CRTBEGIN_SO} <OBJECTS> <LINK_LIBRARIES> ${LIBCPP} ${LIBGCC} ${CRTEND_SO}")
    115 set(CMAKE_CXX_LINK_EXECUTABLE		"<CMAKE_CXX_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES> ${LIBCPP} ${LIBGCC}")
    116 
    117 set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
    118 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
    119 set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
    120 
    121 set(COMMON_C_FLAGS		"-gcc-toolchain ${ANDROID_CC_PATH} --sysroot=${ANDROID_SYSROOT} -fpic -no-canonical-prefixes -DANDROID -D__ANDROID__ -D__STDC_INT64__")
    122 set(COMMON_LINKER_FLAGS	"")
    123 set(ARM_C_FLAGS			"-mfloat-abi=softfp -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ ")
    124 
    125 if (ANDROID_ABI STREQUAL "armeabi-v7a")
    126 	# For armeabi-v7a
    127 	set(TARGET_C_FLAGS		"${ARM_C_FLAGS} -target armv7-none-linux-androideabi -march=armv7-a -mfpu=vfpv3-d16")
    128 	set(TARGET_LINKER_FLAGS	"-Wl,--fix-cortex-a8 -march=armv7-a")
    129 
    130 elseif (ANDROID_ABI STREQUAL "armeabi")
    131 	# For armeabi (ARMv5TE)
    132 	set(TARGET_C_FLAGS		"${ARM_C_FLAGS} -target armv5te-none-linux-androideabi -march=armv5te")
    133 	set(TARGET_LINKER_FLAGS	"${ARM_LINKER_FLAGS} -march=armv5te")
    134 
    135 elseif (ANDROID_ABI STREQUAL "x86")
    136 	set(TARGET_C_FLAGS		"-target i686-none-linux-android -march=i686 -msse3 -mstackrealign")
    137 	set(TARGET_LINKER_FLAGS	"")
    138 
    139 else ()
    140 	message(FATAL_ERROR "Unknown Android ABI \"${ANDROID_ABI}\"")
    141 endif ()
    142 
    143 # \note Without CACHE STRING FORCE cmake ignores these.
    144 set(CMAKE_C_FLAGS				"${COMMON_C_FLAGS} ${TARGET_C_FLAGS}" CACHE STRING "" FORCE)
    145 set(CMAKE_CXX_FLAGS				"${COMMON_C_FLAGS} ${TARGET_C_FLAGS} -I${ANDROID_NDK_PATH}/sources/cxx-stl/gnu-libstdc++/4.8/include -I${ANDROID_NDK_PATH}/sources/cxx-stl/gnu-libstdc++/4.8/libs/${ANDROID_ABI}/include" CACHE STRING "" FORCE)
    146 set(CMAKE_SHARED_LINKER_FLAGS	"-nostdlib -Wl,-shared,-Bsymbolic -Wl,--no-undefined ${COMMON_LINKER_FLAGS} ${TARGET_LINKER_FLAGS}" CACHE STRING "" FORCE)
    147 set(CMAKE_EXE_LINKER_FLAGS		"${COMMON_LINKER_FLAGS} ${TARGET_LINKER_FLAGS}" CACHE STRING "" FORCE)
    148