Try fix msvc error and cmake error on android

modules/dnn/3rdparty/protobuf/CMakeLists.txt

@@ -95,9 +95,10 @@ configure_file("cmake/config.h.in" "config.h")
 
 if(MSVC)
   add_definitions( -D_CRT_SECURE_NO_WARNINGS=1 )
-  ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146 /wd4305)
+  ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146 /wd4305 /wd4127 /wd4100 /wd4512 /wd4125 /w4398 /w4510 /w4610 /w4244 /w4702 /w4389)
 else()
-  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wno-deprecated -Wshadow -Wmissing-declarations -Wunused-parameter -Wunused-local-typedefs -Wsign-compare -Wsign-promo -Wundef)
+  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wno-deprecated -Wmissing-prototypes -Wmissing-declarations -Wshadow -Wunused-parameter -Wunused-local-typedefs -Wsign-compare -Wsign-promo -Wundef)
+  ocv_warnings_disable(CMAKE_C_FLAGS -Wunused-parameter) # clang
 endif()
 
 # Easier to support different versions of protobufs
@@ -171,6 +172,6 @@ if(ENABLE_SOLUTION_FOLDERS)
   set_target_properties(libprotobuf PROPERTIES FOLDER "3rdparty")
 endif()
 
-#if(NOT BUILD_SHARED_LIBS)
-#  ocv_install_target(libprotobuf EXPORT OpenCVModules ARCHIVE DESTINATION ${OPENCV_3P_LIB_INSTALL_PATH} COMPONENT dev)
-#endif()
+if(NOT BUILD_SHARED_LIBS)
+  ocv_install_target(libprotobuf EXPORT OpenCVModules ARCHIVE DESTINATION ${OPENCV_3P_LIB_INSTALL_PATH} COMPONENT dev)
+endif()

modules/dnn/3rdparty/protobuf/src/google/protobuf/io/zero_copy_stream_impl_lite.cc

@@ -35,6 +35,7 @@
 #include <google/protobuf/io/zero_copy_stream_impl_lite.h>
 #include <google/protobuf/stubs/common.h>
 #include <google/protobuf/stubs/stl_util.h>
+#include <algorithm>
 
 namespace google {
 namespace protobuf {
@@ -63,7 +64,7 @@ ArrayInputStream::~ArrayInputStream() {
 
 bool ArrayInputStream::Next(const void** data, int* size) {
   if (position_ < size_) {
-    last_returned_size_ = min(block_size_, size_ - position_);
+    last_returned_size_ = std::min(block_size_, size_ - position_);
     *data = data_ + position_;
     *size = last_returned_size_;
     position_ += last_returned_size_;
@@ -116,7 +117,7 @@ ArrayOutputStream::~ArrayOutputStream() {
 
 bool ArrayOutputStream::Next(void** data, int* size) {
   if (position_ < size_) {
-    last_returned_size_ = min(block_size_, size_ - position_);
+    last_returned_size_ = std::min(block_size_, size_ - position_);
     *data = data_ + position_;
     *size = last_returned_size_;
     position_ += last_returned_size_;
@@ -163,7 +164,7 @@ bool StringOutputStream::Next(void** data, int* size) {
     // that the new size is at least kMinimumSize.
     STLStringResizeUninitialized(
       target_,
-      max(old_size * 2,
+      std::max(old_size * 2,
           kMinimumSize + 0));  // "+ 0" works around GCC4 weirdness.
   }
 
@@ -190,7 +191,7 @@ int CopyingInputStream::Skip(int count) {
   char junk[4096];
   int skipped = 0;
   while (skipped < count) {
-    int bytes = Read(junk, min(count - skipped,
+    int bytes = Read(junk, std::min(count - skipped,
                                implicit_cast<int>(sizeof(junk))));
     if (bytes <= 0) {
       // EOF or read error.

modules/dnn/cmake/find_protobuf.cmake

@@ -4,7 +4,6 @@ endif()
 
 if(NOT BUILD_LIBPROTOBUF_FROM_SOURCES AND PROTOBUF_FOUND AND EXISTS ${PROTOBUF_PROTOC_EXECUTABLE})
   message(STATUS "The protocol buffer compiler and libprotobuf were found")
-
   PROTOBUF_GENERATE_CPP(PROTOBUF_HDRS PROTOBUF_SRCS src/caffe/caffe.proto)
   add_definitions(-DHAVE_PROTOBUF=1)
 else()
@@ -18,19 +17,18 @@ else()
   add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/protobuf)
   endif()
 
+  set(PROTOBUF_LIBRARIES libprotobuf)
+  set(PROTOBUF_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/protobuf/src ${CMAKE_CURRENT_BINARY_DIR})
+  set(PROTOBUF_SRCS ${CMAKE_CURRENT_BINARY_DIR}/caffe.pb.cc)
+  set(PROTOBUF_HDRS ${CMAKE_CURRENT_BINARY_DIR}/caffe.pb.h)
+  add_definitions(-DHAVE_PROTOBUF=1)
+
   add_custom_command(
-    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/caffe.pb.cc
-           ${CMAKE_CURRENT_BINARY_DIR}/caffe.pb.h
+    OUTPUT ${PROTOBUF_SRCS} ${PROTOBUF_HDRS}
     COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_CURRENT_SOURCE_DIR}/src/caffe/compiled/caffe.tar.gz
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     COMMENT "Unpacking compiled caffe protobuf files"
     VERBATIM
   )
-
-  set(PROTOBUF_LIBRARIES libprotobuf)
-  set(PROTOBUF_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/protobuf/src ${CMAKE_CURRENT_BINARY_DIR})
-  set(PROTOBUF_SRCS ${CMAKE_CURRENT_BINARY_DIR}/caffe.pb.cc)
-  set(PROTOBUF_HDRS ${CMAKE_CURRENT_BINARY_DIR}/caffe.pb.h)
-  set(PROTOBUF_PROTOC_EXECUTABLE "")
-  add_definitions(-DHAVE_PROTOBUF=1)
+  set_source_files_properties(${PROTOBUF_SRCS} ${PROTOBUF_HDRS} PROPERTIES GENERATED TRUE)
 endif()