3rdparty: TBB version 2018u1 => 2019u8

- make it configurable via OPENCV_TBB_RELEASE + OPENCV_TBB_RELEASE_MD5
- remove legacy support

3rdparty/tbb/CMakeLists.txt

@@ -5,19 +5,14 @@ if (WIN32 AND NOT ARM)
   message(FATAL_ERROR "BUILD_TBB option supports Windows on ARM only!\nUse regular official TBB build instead of the BUILD_TBB option!")
 endif()
 
-set(tbb_filename "2018_U1.tar.gz")
-set(tbb_subdir "tbb-2018_U1")
-set(tbb_md5 "b2f2fa09adf44a22f4024049907f774b")
-
-ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4702
-    -Wshadow
-    -Wunused-parameter
-    -Wmissing-prototypes  # MacOSX
-)
+ocv_update(OPENCV_TBB_RELEASE "2019_U8")
+ocv_update(OPENCV_TBB_RELEASE_MD5 "7c371d0f62726154d2c568a85697a0ad")
+ocv_update(OPENCV_TBB_FILENAME "${OPENCV_TBB_RELEASE}.tar.gz")
+ocv_update(OPENCV_TBB_SUBDIR "tbb-${OPENCV_TBB_RELEASE}")
 
 set(tbb_src_dir "${OpenCV_BINARY_DIR}/3rdparty/tbb")
-ocv_download(FILENAME ${tbb_filename}
-             HASH ${tbb_md5}
+ocv_download(FILENAME ${OPENCV_TBB_FILENAME}
+             HASH ${OPENCV_TBB_RELEASE_MD5}
              URL
                "${OPENCV_TBB_URL}"
                "$ENV{OPENCV_TBB_URL}"
@@ -29,7 +24,7 @@ ocv_download(FILENAME ${tbb_filename}
 if(NOT res)
   return()
 endif()
-set(tbb_src_dir "${tbb_src_dir}/${tbb_subdir}")
+set(tbb_src_dir "${tbb_src_dir}/${OPENCV_TBB_SUBDIR}")
 
 ocv_include_directories("${tbb_src_dir}/include"
                         "${tbb_src_dir}/src/"
@@ -82,18 +77,19 @@ endif()
 
 if(ANDROID_COMPILER_IS_CLANG)
   add_definitions(-D__TBB_GCC_BUILTIN_ATOMICS_PRESENT=1)
-  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wmissing-prototypes)
 endif()
 
-set(TBB_SOURCE_FILES ${lib_srcs} ${lib_hdrs})
+ocv_warnings_disable(CMAKE_CXX_FLAGS
+    /wd4702
+    -Wshadow
+    -Wunused-parameter
+    -Wclass-memaccess                  # TBB 2018 under GCC 8+
+    -Wimplicit-fallthrough             # TBB 2018 under GCC 7+
+    -Wmissing-prototypes               # MacOSX, Android/Clang
+    -Wundef -Wmissing-declarations     # TBB 2019
+)
 
-if (ARM AND NOT WIN32)
-  if (NOT ANDROID)
-    set(TBB_SOURCE_FILES ${TBB_SOURCE_FILES} "${CMAKE_CURRENT_SOURCE_DIR}/arm_linux_stub.cpp")
-  endif()
-  set(TBB_SOURCE_FILES ${TBB_SOURCE_FILES} "${CMAKE_CURRENT_SOURCE_DIR}/android_additional.h")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -include \"${CMAKE_CURRENT_SOURCE_DIR}/android_additional.h\"")
-endif()
+set(TBB_SOURCE_FILES ${lib_srcs} ${lib_hdrs})
 
 set(tbb_version_file "version_string.ver")
 configure_file("${CMAKE_CURRENT_SOURCE_DIR}/${tbb_version_file}.cmakein" "${CMAKE_CURRENT_BINARY_DIR}/${tbb_version_file}" @ONLY)
@@ -122,8 +118,6 @@ else()
   target_link_libraries(tbb c m dl)
 endif()
 
-ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef -Wmissing-declarations)
-
 # filter out flags that are not handled well by the TBB code
 foreach(var CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG)
   string(REPLACE "-Werror=non-virtual-dtor" "" ${var} "${${var}}")

3rdparty/tbb/android_additional.h

-#include <cstdio>
-
-static inline int getPossibleCPUs()
-{
-   FILE* cpuPossible = fopen("/sys/devices/system/cpu/possible", "r");
-   if(!cpuPossible)
-       return 1;
-
-   char buf[2000]; //big enough for 1000 CPUs in worst possible configuration
-   char* pbuf = fgets(buf, sizeof(buf), cpuPossible);
-   fclose(cpuPossible);
-   if(!pbuf)
-      return 1;
-
-   //parse string of form "0-1,3,5-7,10,13-15"
-   int cpusAvailable = 0;
-
-   while(*pbuf)
-   {
-      const char* pos = pbuf;
-      bool range = false;
-      while(*pbuf && *pbuf != ',')
-      {
-          if(*pbuf == '-') range = true;
-          ++pbuf;
-      }
-      if(*pbuf) *pbuf++ = 0;
-      if(!range)
-        ++cpusAvailable;
-      else
-      {
-          int rstart = 0, rend = 0;
-          sscanf(pos, "%d-%d", &rstart, &rend);
-          cpusAvailable += rend - rstart + 1;
-      }
-
-   }
-   return cpusAvailable ? cpusAvailable : 1;
-}
-
-#define __TBB_HardwareConcurrency() getPossibleCPUs()

3rdparty/tbb/arm_linux_stub.cpp

-#include "tbb/tbb_misc.h"
-
-namespace tbb {
-namespace internal {
-
-void affinity_helper::protect_affinity_mask(bool) {}
-affinity_helper::~affinity_helper() {}
-void destroy_process_mask() {}
-
-}
-}