Fixes for swig builds and tests using MSVC

On windows platforms, with paths set up for MSVC toolchains,
this works to build swig and run test suites, assuming
"windows" install of boost.

./autogen.sh;  ./configure CC='cl' CXX='cl' --with-boost=c:/boost_1_55_0 --without-pcre

Also remove -g flag generating annoying swig warnings.
May be some more proper autoconf way to do this.

configure.ac

@@ -27,11 +27,21 @@ AH_BOTTOM([
 
 dnl Check for programs that a user requires to build SWIG
 AC_PROG_CC
+# When using CL for CC should use it for CXX too
+# AM_PROG_CC_C_O rewrites $CC, so cannot test "$CC" = cl
+MSVC=
+$CC -? 2>&1 | grep -i microsoft >/dev/null && MSVC=yes
+CXX=$CC
 AC_PROG_CXX
 AC_EXEEXT
 AC_OBJEXT
 AM_PROG_CC_C_O  # Needed for subdir-objects in AUTOMAKE_OPTIONS
-
+# Want CXX to be same rewritten CC
+if test "$MSVC" = yes; then
+CFLAGS=`echo "$CFLAGS" | sed -e 's/-g//'`
+CXXFLAGS=`echo "$CFLAGS" | sed -e 's/-g//'`
+CXX=$CC
+fi
 AC_COMPILE_WARNINGS # Increase warning levels
 
 AC_DEFINE_UNQUOTED(SWIG_CXX, ["$CXX"], [Compiler that built SWIG])
@@ -104,11 +114,15 @@ AS_IF([test "x$with_pcre" != xno],
   ])
 
 
+if test "$MSVC" = yes; then
+enable_ccache=
+AC_MSG_NOTICE([Disabling ccache for $CC])
+else
 dnl CCache
 AC_ARG_ENABLE([ccache], AS_HELP_STRING([--disable-ccache], [disable building and installation of ccache-swig executable (default enabled)]), [enable_ccache=$enableval], [enable_ccache=yes])
 AC_MSG_CHECKING([whether to enable ccache-swig])
 AC_MSG_RESULT([$enable_ccache])
-
+fi
 if test "$enable_ccache" = yes; then
   AC_CONFIG_SUBDIRS(CCache)
   ENABLE_CCACHE=1
@@ -187,9 +201,10 @@ then
             if test "$GCC" = yes; then
                 LDSHARED="$CC -shared"
             else
-                if test "cl" = $CC ;  then
-                    # Microsoft Visual C++ (MSVC)
-                    LDSHARED="$CC -nologo -LD"
+
+                if test "$MSVC" = yes ;  then
+                    # Microsoft Visual C++ (MSVC).  '/' else autotools 'compile' breaks
+                    LDSHARED='$(CC) /nologo /LD'
                 else
                     # Unknown compiler try gcc approach
                     LDSHARED="$CC -shared"
@@ -253,9 +268,9 @@ then
             if test "$GCC" = yes; then
                 TRYLINKINGWITHCXX="CXXSHARED= $CXX -shared "
             else
-                if test "cl" = $CXX ;  then
-                    # Microsoft Visual C++ (MSVC)
-                    TRYLINKINGWITHCXX="CXXSHARED= $CXX -nologo -LD"
+                if test "$MSVC" = yes ;  then
+                    # Microsoft Visual C++ (MSVC).  '/' else autotools 'compile' breaks
+                    TRYLINKINGWITHCXX='CXXSHARED= $(CXX) /nologo /LD'
                 else
                     TRYLINKINGWITHCXX="#unknown Windows compiler"
                 fi
@@ -356,9 +371,13 @@ fi
 # libc++ for tests and examples to run under mono. May affect 
 # other language targets as well - problem is an OSX incompatibility
 # between libraries depending on libstdc++ and libc++.
+# MS compiler requires /EHsc for exception support to run tests
 CLANGXX=
 $CXX -v 2>&1 | grep -i clang >/dev/null && CLANGXX=yes
 case $host in
+  *-*-cygwin* |*-*-mingw*  ) if test "$MSVC" = "yes";
+    then PLATCXXFLAGS="$PLATCXXFLAGS -EHsc"
+    fi;;
   *-*-darwin11* | *-*-darwin12* |*-*-darwin13*  ) if test "$CLANGXX" = "yes";
     then PLATCXXFLAGS="$PLATCXXFLAGS -stdlib=libc++"
     fi;;

preinst-swig.in

@@ -2,6 +2,8 @@
 builddir=`dirname $0`
 srcdir=`cd "$builddir" && cd '@srcdir@' && pwd`
 SWIG_LIB=$srcdir/Lib
-#SWIG_LIB=`cygpath -w $srcdir/Lib` # For native Windows version of SWIG
+# For native Windows version of SWIG
+"$builddir/swig" -version 2>&1 | \
+  grep -i 'compiled with' | grep -i -e ' cl ' -e ' cl.exe ' && SWIG_LIB=`cygpath -w $srcdir/Lib`
 export SWIG_LIB
 exec "$builddir/swig" $*