Fixed recently introduced build problems on some platforms

cmake/OpenCVFindLibsGrfmt.cmake

@@ -61,6 +61,16 @@ if(TIFF_BIGTIFF_VERSION AND NOT TIFF_VERSION_BIG)
   set(TIFF_VERSION_BIG ${TIFF_BIGTIFF_VERSION})
 endif()
 
+if(NOT TIFF_VERSION_STRING AND TIFF_INCLUDE_DIR)
+  list(GET TIFF_INCLUDE_DIR 0 _TIFF_INCLUDE_DIR)
+  if(EXISTS "${_TIFF_INCLUDE_DIR}/tiffvers.h")
+    file(STRINGS "${_TIFF_INCLUDE_DIR}/tiffvers.h" tiff_version_str REGEX "^#define[\t ]+TIFFLIB_VERSION_STR[\t ]+\"LIBTIFF, Version .*")
+    string(REGEX REPLACE "^#define[\t ]+TIFFLIB_VERSION_STR[\t ]+\"LIBTIFF, Version +([^ \\n]*).*" "\\1" TIFF_VERSION_STRING "${tiff_version_str}")
+    unset(tiff_version_str)
+  endif()
+  unset(_TIFF_INCLUDE_DIR)
+endif()
+
 # --- libjpeg (optional) ---
 if(WITH_JPEG)
   if(BUILD_JPEG)

cmake/OpenCVModule.cmake

@@ -131,7 +131,7 @@ macro(ocv_add_module _name)
         set(OPENCV_MODULES_PUBLIC ${OPENCV_MODULES_PUBLIC} "${the_module}" CACHE INTERNAL "List of OpenCV modules marked for export")
       endif()
     endif()
-    
+
     # add self to the world dependencies
     if(NOT DEFINED OPENCV_MODULE_IS_PART_OF_WORLD AND NOT OPENCV_MODULE_${the_module}_CLASS STREQUAL "BINDINGS" OR OPENCV_MODULE_IS_PART_OF_WORLD)
       ocv_add_dependencies(opencv_world OPTIONAL ${the_module})
@@ -512,8 +512,8 @@ endmacro()
 macro(ocv_add_precompiled_headers the_target)
     if("${the_target}" MATCHES "^opencv_test_.*$")
         SET(pch_path "test/test_")
-	elseif("${the_target}" MATCHES "opencv_perf_gpu_cpu")
-	    SET(pch_path "perf_cpu/perf_cpu_")
+  elseif("${the_target}" MATCHES "opencv_perf_gpu_cpu")
+      SET(pch_path "perf_cpu/perf_cpu_")
     elseif("${the_target}" MATCHES "^opencv_perf_.*$")
         SET(pch_path "perf/perf_")
     else()

cmake/OpenCVUtils.cmake

@@ -32,6 +32,32 @@ macro(ocv_clear_vars)
   endforeach()
 endmacro()
 
+
+include(CheckCXXCompilerFlag)
+include(CheckCCompilerFlag)
+
+macro(ocv_check_flag_support lang flag varname)
+  if("_${lang}_" MATCHES "_CXX_")
+    set(_lang CXX)
+  elseif("_${lang}_" MATCHES ".*_C_.*")
+    set(_lang C)
+  else()
+    set(_lang ${lang})
+  endif()
+
+  string(TOUPPER "${flag}" ${varname})
+  string(REGEX REPLACE "^(/|-)" "HAVE_${_lang}_" ${varname} "${${varname}}")
+  string(REPLACE "-" "_" ${varname} "${${varname}}")
+
+  if(_lang STREQUAL "CXX")
+    CHECK_CXX_COMPILER_FLAG(${flag} ${${varname}})
+  elseif(_lang STREQUAL "C")
+    CHECK_C_COMPILER_FLAG("${flag}" ${${varname}})
+  else()
+    set(${varname} FALSE)
+  endif()
+endmacro()
+
 # turns off warnings
 macro(ocv_warnings_disable)
   if(NOT ENABLE_NOISY_WARNINGS)
@@ -56,11 +82,12 @@ macro(ocv_warnings_disable)
     elseif(CV_COMPILER_IS_GNU AND _gxx_warnings AND _flag_vars)
       foreach(var ${_flag_vars})
         foreach(warning ${_gxx_warnings})
-          if(warning MATCHES "^-Wno-")
-            set(${var} "${${var}} ${warning}")
-          else()
+          if(NOT warning MATCHES "^-Wno-")
             string(REPLACE "${warning}" "" ${var} "${${var}}")
             string(REPLACE "-W" "-Wno-" warning "${warning}")
+          endif()
+          ocv_check_flag_support(${var} "${warning}" _varname)
+          if(${_varname})
             set(${var} "${${var}} ${warning}")
           endif()
         endforeach()