Suppressed hundreds of useless MSVC warnings (can be reenabled setting cmake variable ENABLE_NOISY_WARNINGS to ON). Fixed some of remaining warnings.

3rdparty/libjasper/CMakeLists.txt

@@ -22,8 +22,10 @@ file(GLOB lib_ext_hdrs jasper/*.h)
 add_library(${JASPER_LIBRARY} STATIC ${lib_srcs} ${lib_hdrs} ${lib_ext_hdrs})
 
 if(MSVC)
-  string(REPLACE "/W3" "/W0" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-  string(REPLACE "/W4" "/W0" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  if(NOT ENABLE_NOISY_WARNINGS)
+    string(REPLACE "/W3" "/W0" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
+    string(REPLACE "/W4" "/W0" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  endif()
   add_definitions(-DJAS_WIN_MSVC_BUILD)
 endif()
 
@@ -33,7 +35,7 @@ if(UNIX)
   endif()
 endif()
 
-if(CMAKE_COMPILER_IS_GNUCXX)
+if(CMAKE_COMPILER_IS_GNUCXX AND NOT ENABLE_NOISY_WARNINGS)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-implicit-function-declaration -Wno-unused")
 endif()
 

3rdparty/libtiff/CMakeLists.txt

@@ -82,8 +82,7 @@ set(lib_srcs
 
 if(UNIX)
   list(APPEND lib_srcs tif_unix.c)
-  if(CMAKE_COMPILER_IS_GNUCXX)
-    #set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-strict-aliasing -Wno-int-to-pointer-cast")
+  if(CMAKE_COMPILER_IS_GNUCXX AND NOT ENABLE_NOISY_WARNINGS)
     set_source_files_properties(tif_unix.c PROPERTIES COMPILE_FLAGS "-w")
   endif()
 endif()
@@ -92,7 +91,7 @@ if(WIN32)
   list(APPEND lib_srcs tif_win32.c)
 endif(WIN32)
 
-if(MSVC)
+if(MSVC AND NOT ENABLE_NOISY_WARNINGS)
   string(REPLACE "/W4" "/W0" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
   string(REPLACE "/W4" "/W0" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 endif()

3rdparty/zlib/CMakeLists.txt

@@ -82,7 +82,7 @@ if(UNIX)
   endif()
 endif()
 
-if(MSVC)
+if(MSVC AND NOT ENABLE_NOISY_WARNINGS)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4013")
 endif()