From 97ae8f7af7fb1642bd42002682979d676f1a6239 Mon Sep 17 00:00:00 2001
From: Alexander Shishkov <no@email>
Date: Mon, 6 Jun 2011 10:26:59 +0000
Subject: [PATCH] added BUILD_WITH_STATIC_CRT option for static linking with
 CRT on MSVC

---
 CMakeLists.txt              | 49 +++++++++++++++++++++++++++++++++++++
 modules/ffmpeg/ffopencv.cpp |  2 ++
 2 files changed, 51 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index abbfe69490..8466b0605e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -99,6 +99,55 @@ endif()
 # ----------------------------------------------------------------------------
 set(BUILD_SHARED_LIBS ON CACHE BOOL "Build shared libraries (.dll/.so) instead of static ones (.lib/.a)")
 
+# ----------------------------------------------------------------------------
+# Use statically or dynamically linked CRT?
+# Default: dynamic
+# ----------------------------------------------------------------------------
+if(MSVC AND NOT BUILD_SHARED_LIBS)
+  option (BUILD_WITH_STATIC_CRT "Enables use of staticaly linked CRT" OFF)
+endif()
+  
+if(MSVC)
+	if(BUILD_WITH_STATIC_CRT)
+		foreach(flag_var
+				CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
+				CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
+				CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+				CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+		   if(${flag_var} MATCHES "/MD")
+			  string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
+		   endif(${flag_var} MATCHES "/MD")
+
+		   if(${flag_var} MATCHES "/MDd")
+			  string(REGEX REPLACE "/MDd" "/MTd" ${flag_var} "${${flag_var}}")
+		   endif(${flag_var} MATCHES "/MDd")		   
+		endforeach(flag_var)
+		
+		set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /NODEFAULTLIB:atlthunk.lib /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:msvcrtd.lib")
+		
+		set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} /NODEFAULTLIB:libcmt.lib")
+		set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /NODEFAULTLIB:libcmtd.lib")
+				
+	else(BUILD_WITH_STATIC_CRT)
+		foreach(flag_var
+				CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
+				CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
+				CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+				CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+		   if(${flag_var} MATCHES "/MT")
+			  string(REGEX REPLACE "/MT" "/MD" ${flag_var} "${${flag_var}}")
+		   endif(${flag_var} MATCHES "/MT")
+
+		   if(${flag_var} MATCHES "/MTd")
+			  string(REGEX REPLACE "/MTd" "/MDd" ${flag_var} "${${flag_var}}")
+		   endif(${flag_var} MATCHES "/MTd")		   
+		endforeach(flag_var)
+
+	endif(BUILD_WITH_STATIC_CRT)
+endif(MSVC)
+
+
+
 # ----------------------------------------------------------------------------
 #  Variables for cvconfig.h.cmake
 # ----------------------------------------------------------------------------
diff --git a/modules/ffmpeg/ffopencv.cpp b/modules/ffmpeg/ffopencv.cpp
index 4a3aa3a863..44f83f8728 100644
--- a/modules/ffmpeg/ffopencv.cpp
+++ b/modules/ffmpeg/ffopencv.cpp
@@ -528,7 +528,9 @@ That's all there is to it!
 
 #if defined _MSC_VER && _MSC_VER >= 1200
 
+#if !defined(_MT) || defined(_DLL) 
 extern "C" { __declspec(dllexport) unsigned int __lc_codepage = 0; }
+#endif
 
 #pragma comment(lib, "libgcc_.a")
 #pragma comment(lib, "libmingwex_.a")