explained reason why IPP is disabled on 32-bit Linux. disable IPP's…

explained reason why IPP is disabled on 32-bit Linux. disable IPP's minMaxLoc_32f on 32-bit OSes only

cmake/OpenCVFindIPP.cmake

@@ -35,7 +35,7 @@ unset(IPP_VERSION_MINOR)
 unset(IPP_VERSION_BUILD)
 
 if (X86 AND UNIX AND NOT APPLE AND NOT ANDROID AND BUILD_SHARED_LIBS)
-    message(STATUS "On 32-bit Linux IPP can not currently be used with dynamic libs. Set BUILD_SHARED_LIBS=OFF")
+    message(STATUS "On 32-bit Linux IPP can not currently be used with dynamic libs because of linker errors. Set BUILD_SHARED_LIBS=OFF")
     return()
 endif()
 

modules/core/src/stat.cpp

@@ -2314,7 +2314,10 @@ void cv::minMaxIdx(InputArray _src, double* minVal,
                     depth == CV_8U ? (ippiMinMaxIndxFuncC1)ippiMinMaxIndx_8u_C1R :
                     depth == CV_8S ? (ippiMinMaxIndxFuncC1)ippiMinMaxIndx_8s_C1R :
                     depth == CV_16U ? (ippiMinMaxIndxFuncC1)ippiMinMaxIndx_16u_C1R :
-                    /*depth == CV_32F ? (ippiMinMaxIndxFuncC1)ippiMinMaxIndx_32f_C1R :*/ 0;
+                #if !((defined _MSC_VER && defined _M_IX86) || defined __i386__)
+                    depth == CV_32F ? (ippiMinMaxIndxFuncC1)ippiMinMaxIndx_32f_C1R :
+                #endif
+                    0;
                 CV_SUPPRESS_DEPRECATED_END
 
                 if( ippFuncC1 )