- more fixes for Windows build

src/CMakeLists.txt

@@ -1,5 +1,53 @@
 project(rtphone)
 
+macro(configure_msvc_runtime)
+  if(MSVC)
+    # Default to statically-linked runtime.
+    if("${MSVC_RUNTIME}" STREQUAL "")
+      set(MSVC_RUNTIME "static")
+    endif()
+    # Set compiler options.
+    set(variables
+      CMAKE_C_FLAGS_DEBUG
+      CMAKE_C_FLAGS_MINSIZEREL
+      CMAKE_C_FLAGS_RELEASE
+      CMAKE_C_FLAGS_RELWITHDEBINFO
+      CMAKE_CXX_FLAGS_DEBUG
+      CMAKE_CXX_FLAGS_MINSIZEREL
+      CMAKE_CXX_FLAGS_RELEASE
+      CMAKE_CXX_FLAGS_RELWITHDEBINFO
+    )
+    if(${MSVC_RUNTIME} STREQUAL "static")
+      message(STATUS
+        "rtphone: MSVC -> forcing use of statically-linked runtime."
+      )
+      foreach(variable ${variables})
+        if(${variable} MATCHES "/MD")
+          string(REGEX REPLACE "/MD" "/MT" ${variable} "${${variable}}")
+        endif()
+      endforeach()
+    else()
+      message(STATUS
+        "rtphone: MSVC -> forcing use of dynamically-linked runtime."
+      )
+      foreach(variable ${variables})
+        if(${variable} MATCHES "/MT")
+          string(REGEX REPLACE "/MT" "/MD" ${variable} "${${variable}}")
+        endif()
+      endforeach()
+    endif()
+
+    foreach(variable ${variables})
+        string(REGEX REPLACE "/Z[iI7]" ""
+               ${variable}
+               "${${variable}}")
+
+        set(${variable} "${${variable}} /Zi /Oy-")
+    endforeach()
+  endif()
+endmacro()
+
+
 # Rely on C++ 11
 set (CMAKE_CXX_STANDARD 11)
 set (CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -74,3 +122,5 @@ target_include_directories(rtphone
     PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
            $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/engine>
     PRIVATE ../../libs/speex/include ../../libs ../)
+
+configure_msvc_runtime()