Merge pull request #89 from semanux/choice-between-mt-and-md

Choice between `\MT` and `\MD` on Windows

Author: vonnieda

CMakeLists.txt

@@ -18,6 +18,7 @@ set(OPENPNP_CAPTURE_LIB_SOVERSION "0" CACHE STRING "openpnp-capture library sove
 # Library type options
 option(BUILD_SHARED_LIBS "Build shared library" ON)
 option(BUILD_STATIC_LIBS "Build static library" OFF)
+option(LINK_DYNAMIC_MSVC_RUNTIME "Link MSVC runtime statically" OFF)
 
 # Validate library type options
 if(BUILD_STATIC_LIBS AND BUILD_SHARED_LIBS)
@@ -93,10 +94,13 @@ set_target_properties(openpnp-capture PROPERTIES
 
 IF (WIN32)
     if(MSVC)
-        # build with static runtime rather than DLL based so that we
-        # don't have to distribute it
-        set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")
-        set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MTd")
+        if(LINK_DYNAMIC_MSVC_RUNTIME)
+            set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MD")
+            set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MDd")
+        else()
+            set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MT")
+            set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MTd")
+        endif()
     endif()
 
     # set the platform identification string

README_BUILD.md

@@ -45,6 +45,7 @@ cmake -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=OFF -DBUILD_STATIC_LIBS=ON -G
 
 - `BUILD_SHARED_LIBS`: Build shared library (default: ON)
 - `BUILD_STATIC_LIBS`: Build static library (default: OFF)
+- `LINK_DYNAMIC_MSVC_RUNTIME`: Link MSVC runtime statically, aka `\MD`. Otherwise `\MT`. (default: OFF)
 
 **Note**: If both options are enabled, the build will default to static library with a warning.