Staticly link the windows jnidispatch.dll when build with MSVC compiler

Without this modification the jnidispatch.dll (when built by MSVC) is
dynamicly linked against msvcr100.dll. This requires the corresponding
runtime libraries to be installed.

Closes: #636

Author: matthiasblaesing

Diff for: CHANGES.md

@@ -72,6 +72,7 @@ Bug Fixes
 * [#633](https://github.com/java-native-access/jna/pull/633): Restore default usage of platform native encoding for Java strings passed to native functions (was hard-coded to UTF-8 in 4.0 and later) [@amake](https://github.com/amake)
 * [#634](https://github.com/java-native-access/jna/pull/634): Improve BSTR handling and add `SysStringByteLen` and `SysStringLen` to `com.sun.jna.platform.win32.OleAuto` - [@matthiasblaesing](https://github.com/matthiasblaesing).
 * [#646](https://github.com/java-native-access/jna/issues/646): `platform.win32.COM.COMBindingBaseObject` swallows reason if instantiation fails - [@matthiasblaesing](https://github.com/matthiasblaesing).
+* [#636](https://github.com/java-native-access/jna/issues/636); Staticly link visual c++ runtime when building with MSVC - [@matthiasblaesing](https://github.com/matthiasblaesing).
 
 Release 4.2.1
 =============

Diff for: lib/native/win32-x86-64.jar

@@ -207,19 +207,24 @@ STRIP=@echo
 LIBPFX=
 LIBSFX=.dll
 TESTLIB_TRUNC=$(BUILD)/testlib-truncated.dll
+
 ifeq ($(ARCH),amd64)
 MINGW_PREFIX?=x86_64-w64-mingw32-
 FFI_CONFIG+=--host=x86_64-w64-mingw32
-# Need windres from mingw distribution, even if building with MSVC
-WINDRES=$(MINGW_PREFIX)windres
-MINGW=$(MINGW_PREFIX)gcc 
 else
-MINGW_PREFIX?=i686-pc-mingw32-
+FFI_CONFIG+=--host=i686-w64-mingw32
+MINGW_PREFIX?=i686-w64-mingw32-
 endif
+# Need windres from mingw distribution, even if building with MSVC
+WINDRES=$(MINGW_PREFIX)windres
+MINGW=$(MINGW_PREFIX)gcc
 
 ifeq ($(USE_MSVC),true)
 # MS compiler
 CC=$(FFI_SRC)/msvcc.sh
+ifneq ($(DYNAMIC_LIBFFI),true)
+CDEFINES+=-DUSE_STATIC_RTL
+endif
 COPT=
 CPP=cl -nologo -EP
 LD=link