Merge pull request #6866 from alalek:gnu_toolchain

platforms/linux/aarch64-gnu.toolchain.cmake

+set(CMAKE_SYSTEM_PROCESSOR aarch64)
+set(GCC_COMPILER_VERSION "4.8" CACHE STRING "GCC Compiler version")
+set(GNU_MACHINE "aarch64-linux-gnu" CACHE STRING "GNU compiler triple")
+include("${CMAKE_CURRENT_LIST_DIR}/arm.toolchain.cmake")

platforms/linux/arm-gnueabi.toolchain.cmake

-set(CMAKE_SYSTEM_NAME Linux)
-set(CMAKE_SYSTEM_VERSION 1)
-set(CMAKE_SYSTEM_PROCESSOR arm)
-
 set(GCC_COMPILER_VERSION "4.6" CACHE STRING "GCC Compiler version")
-
-set(FLOAT_ABI_SUFFIX "")
-if (NOT SOFTFP)
-  set(FLOAT_ABI_SUFFIX "hf")
-endif()
-
-find_program(CMAKE_C_COMPILER NAMES arm-linux-gnueabi${FLOAT_ABI_SUFFIX}-gcc-${GCC_COMPILER_VERSION})
-find_program(CMAKE_CXX_COMPILER NAMES arm-linux-gnueabi${FLOAT_ABI_SUFFIX}-g++-${GCC_COMPILER_VERSION})
-set(ARM_LINUX_SYSROOT /usr/arm-linux-gnueabi${FLOAT_ABI_SUFFIX} CACHE PATH "ARM cross compilation system root")
-
-set(CMAKE_CXX_FLAGS           ""                    CACHE STRING "c++ flags")
-set(CMAKE_C_FLAGS             ""                    CACHE STRING "c flags")
-set(CMAKE_SHARED_LINKER_FLAGS ""                    CACHE STRING "shared linker flags")
-set(CMAKE_MODULE_LINKER_FLAGS ""                    CACHE STRING "module linker flags")
-set(CMAKE_EXE_LINKER_FLAGS    "-Wl,-z,nocopyreloc"  CACHE STRING "executable linker flags")
-
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi")
-set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi")
-
-set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--fix-cortex-a8 -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,--fix-cortex-a8 -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,--fix-cortex-a8 -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_LINUX_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( ${ARGN} )
- SET( WIN32 )
- SET( APPLE )
- SET( UNIX 1 )
- set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
- set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
- set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
-endmacro()
+set(GNU_MACHINE "arm-linux-gnueabi" CACHE STRING "GNU compiler triple")
+include("${CMAKE_CURRENT_LIST_DIR}/arm.toolchain.cmake")

platforms/linux/arm.toolchain.cmake

+if(COMMAND toolchain_save_config)
+  return() # prevent recursive call
+endif()
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_VERSION 1)
+if(NOT DEFINED CMAKE_SYSTEM_PROCESSOR)
+  set(CMAKE_SYSTEM_PROCESSOR arm)
+else()
+  #message("CMAKE_SYSTEM_PROCESSOR=${CMAKE_SYSTEM_PROCESSOR}")
+endif()
+
+include("${CMAKE_CURRENT_LIST_DIR}/gnu.toolchain.cmake")
+
+if(CMAKE_SYSTEM_PROCESSOR STREQUAL arm AND NOT ARM_IGNORE_FP)
+  set(FLOAT_ABI_SUFFIX "")
+  if(NOT SOFTFP)
+    set(FLOAT_ABI_SUFFIX "hf")
+  endif()
+endif()
+
+if(NOT "x${GCC_COMPILER_VERSION}" STREQUAL "x")
+  set(__GCC_VER_SUFFIX "-${GCC_COMPILER_VERSION}")
+endif()
+
+if(NOT DEFINED CMAKE_C_COMPILER)
+  find_program(CMAKE_C_COMPILER NAMES ${GNU_MACHINE}${FLOAT_ABI_SUFFIX}-gcc${__GCC_VER_SUFFIX})
+else()
+  #message(WARNING "CMAKE_C_COMPILER=${CMAKE_C_COMPILER} is defined")
+endif()
+if(NOT DEFINED CMAKE_CXX_COMPILER)
+  find_program(CMAKE_CXX_COMPILER NAMES ${GNU_MACHINE}${FLOAT_ABI_SUFFIX}-g++${__GCC_VER_SUFFIX})
+else()
+  #message(WARNING "CMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER} is defined")
+endif()
+
+if(NOT DEFINED ARM_LINUX_SYSROOT AND DEFINED GNU_MACHINE)
+  set(ARM_LINUX_SYSROOT /usr/${GNU_MACHINE}${FLOAT_ABI_SUFFIX})
+endif()
+
+if(NOT DEFINED CMAKE_CXX_FLAGS)
+  set(CMAKE_CXX_FLAGS           "" CACHE INTERAL "")
+  set(CMAKE_C_FLAGS             "" CACHE INTERAL "")
+  set(CMAKE_SHARED_LINKER_FLAGS "" CACHE INTERAL "")
+  set(CMAKE_MODULE_LINKER_FLAGS "" CACHE INTERAL "")
+  set(CMAKE_EXE_LINKER_FLAGS    "" CACHE INTERAL "")
+
+  set(CMAKE_CXX_FLAGS           "${CMAKE_CXX_FLAGS} -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi")
+  set(CMAKE_C_FLAGS             "${CMAKE_C_FLAGS} -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi")
+  if(CMAKE_SYSTEM_PROCESSOR STREQUAL arm)
+    set(CMAKE_CXX_FLAGS           "-mthumb ${CMAKE_CXX_FLAGS}")
+    set(CMAKE_C_FLAGS             "-mthumb ${CMAKE_C_FLAGS}")
+    set(CMAKE_EXE_LINKER_FLAGS    "${CMAKE_EXE_LINKER_FLAGS} -Wl,-z,nocopyreloc")
+  endif()
+  if(CMAKE_SYSTEM_PROCESSOR STREQUAL arm)
+    set(ARM_LINKER_FLAGS "-Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now")
+  elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL aarch64)
+    set(ARM_LINKER_FLAGS "-Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now")
+  endif()
+  set(CMAKE_SHARED_LINKER_FLAGS "${ARM_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}")
+  set(CMAKE_MODULE_LINKER_FLAGS "${ARM_LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS}")
+  set(CMAKE_EXE_LINKER_FLAGS    "${ARM_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}")
+else()
+  #message(WARNING "CMAKE_CXX_FLAGS='${CMAKE_CXX_FLAGS}' is defined")
+endif()
+
+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_LINUX_SYSROOT})
+
+if(EXISTS ${CUDA_TOOLKIT_ROOT_DIR})
+  set(CMAKE_FIND_ROOT_PATH ${CMAKE_FIND_ROOT_PATH} ${CUDA_TOOLKIT_ROOT_DIR})
+endif()
+
+set(TOOLCHAIN_CONFIG_VARS ${TOOLCHAIN_CONFIG_VARS}
+    ARM_LINUX_SYSROOT
+    ENABLE_NEON
+    ENABLE_VFPV3
+    CUDA_TOOLKIT_ROOT_DIR
+)
+toolchain_save_config()

platforms/linux/gnu.toolchain.cmake

+cmake_minimum_required(VERSION 2.8)
+
+# load settings in case of "try compile"
+set(TOOLCHAIN_CONFIG_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/toolchain.config.cmake")
+get_property(__IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
+if(__IN_TRY_COMPILE)
+  include("${CMAKE_CURRENT_SOURCE_DIR}/../toolchain.config.cmake" OPTIONAL) # CMAKE_BINARY_DIR is different
+  macro(toolchain_save_config)
+    # nothing
+  endmacro()
+else()
+  macro(toolchain_save_config)
+    set(__config "#message(\"Load TOOLCHAIN config...\")\n")
+    get_cmake_property(__variableNames VARIABLES)
+    set(__vars_list ${ARGN})
+    list(APPEND __vars_list
+        ${TOOLCHAIN_CONFIG_VARS}
+        CMAKE_SYSTEM_NAME
+        CMAKE_SYSTEM_VERSION
+        CMAKE_SYSTEM_PROCESSOR
+        CMAKE_C_COMPILER
+        CMAKE_CXX_COMPILER
+        CMAKE_C_FLAGS
+        CMAKE_CXX_FLAGS
+        CMAKE_SHARED_LINKER_FLAGS
+        CMAKE_MODULE_LINKER_FLAGS
+        CMAKE_EXE_LINKER_FLAGS
+        CMAKE_SKIP_RPATH
+        CMAKE_FIND_ROOT_PATH
+        GCC_COMPILER_VERSION
+    )
+    foreach(__var ${__variableNames})
+      foreach(_v ${__vars_list})
+        if("x${__var}" STREQUAL "x${_v}")
+          if(${__var} MATCHES " ")
+            set(__config "${__config}set(${__var} \"${${__var}}\")\n")
+          else()
+            set(__config "${__config}set(${__var} ${${__var}})\n")
+          endif()
+        endif()
+      endforeach()
+    endforeach()
+    if(EXISTS "${TOOLCHAIN_CONFIG_FILE}")
+      file(READ "${TOOLCHAIN_CONFIG_FILE}" __config_old)
+    endif()
+    if("${__config_old}" STREQUAL "${__config}")
+      # nothing
+    else()
+      #message("Update TOOLCHAIN config: ${__config}")
+      file(WRITE "${TOOLCHAIN_CONFIG_FILE}" "${__config}")
+    endif()
+    unset(__config)
+    unset(__config_old)
+    unset(__vars_list)
+    unset(__variableNames)
+  endmacro()
+endif() # IN_TRY_COMPILE
+
+set(CMAKE_SKIP_RPATH TRUE)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
+
+# macro to find programs on the host OS
+macro(find_host_program)
+ set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+ set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER)
+ set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER)
+ if(CMAKE_HOST_WIN32)
+  SET(WIN32 1)
+  SET(UNIX)
+ elseif(CMAKE_HOST_APPLE)
+  SET(APPLE 1)
+  SET(UNIX)
+ endif()
+ find_program(${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()
+
+set(CMAKE_SKIP_RPATH TRUE CACHE BOOL "If set, runtime paths are not added when using shared libraries.")