[Qemu-devel] [RFC PATCH 03/10] qemu-ga: Add an configure option to specify path to Windows VSS SDK

[Tomoki Sekiyama]

To enable VSS support in qemu-ga for Windows, header files included in
VSS SDK is required.
The VSS support is enabled when the option like below:
  ./configure --with-vss-sdk="/pass/to/VSS SDK"

VSS SDK is available from:
  http://www.microsoft.com/en-us/download/details.aspx?id=23490

To cross-compilie using mingw32 for Linux, you need to setup the SDK on
Windows environments to extract headers. You can also use wine to run the
setup of SDK on Linux etc.

Signed-off-by: Tomoki Sekiyama <address@hidden>
---
 .gitignore |    1 +
 Makefile   |    1 +
 configure  |   41 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+)

diff --git a/.gitignore b/.gitignore
index 53fe9c3..3f450e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -77,6 +77,7 @@ fsdev/virtfs-proxy-helper.pod
 *.la
 *.pc
 .libs
+.sdk
 *.swp
 *.orig
 .pc
diff --git a/Makefile b/Makefile
index 0d9099a..fab664f 100644
--- a/Makefile
+++ b/Makefile
@@ -252,6 +252,7 @@ distclean: clean
        for d in $(TARGET_DIRS); do \
        rm -rf $$d || exit 1 ; \
         done
+       rm -Rf .sdk
        if test -f pixman/config.log; then make -C pixman distclean; fi
 
 KEYMAPS=da     en-gb  et  fr     fr-ch  is  lt  modifiers  no  pt-br  sv \
diff --git a/configure b/configure
index e279263..da49c52 100755
--- a/configure
+++ b/configure
@@ -220,6 +220,8 @@ usb_redir=""
 opengl=""
 zlib="yes"
 guest_agent="yes"
+guest_agent_with_vss="no"
+vss_win32_sdk=""
 want_tools="yes"
 libiscsi=""
 coroutine=""
@@ -884,6 +886,8 @@ for opt do
   ;;
   --disable-guest-agent) guest_agent="no"
   ;;
+  --with-vss-sdk=*) vss_win32_sdk="$optarg"
+  ;;
   --enable-tools) want_tools="yes"
   ;;
   --disable-tools) want_tools="no"
@@ -1142,6 +1146,7 @@ echo "  --disable-usb-redir      disable usb network 
redirection support"
 echo "  --enable-usb-redir       enable usb network redirection support"
 echo "  --disable-guest-agent    disable building of the QEMU Guest Agent"
 echo "  --enable-guest-agent     enable building of the QEMU Guest Agent"
+echo "  --with-vss-sdk=SDK-path  enable Windows VSS support in QEMU Guest 
Agent"
 echo "  --disable-seccomp        disable seccomp support"
 echo "  --enable-seccomp         enables seccomp support"
 echo "  --with-coroutine=BACKEND coroutine backend. Supported options:"
@@ -2897,6 +2902,38 @@ if test "$usb_redir" != "no" ; then
 fi
 
 ##########################################
+# check if we have VSS SDK headers for win
+
+if test "$mingw32" = "yes" -a "$guest_agent" = "yes" ; then
+  case "$vss_win32_sdk" in
+    "")   vss_win32_include="" ;;
+    *\ *) # The SDK is installed in "Program Files" by default, but we cannot
+          # handle path with spaces. So we copy the headers into ".sdk/sdk".
+          vss_win32_include="-I$source_path/.sdk/vss"
+          symlink "$vss_win32_sdk/inc" "$source_path/.sdk/vss/inc"
+         ;;
+    *)    vss_win32_include="-I$vss_win32_sdk"
+  esac
+  cat > $TMPC << EOF
+#define __MIDL_user_allocate_free_DEFINED__
+#include <inc/win2003/vss.h>
+int main(void) { return VSS_CTX_BACKUP; }
+EOF
+  if compile_prog "$vss_win32_include" "" ; then
+    guest_agent_with_vss="yes"
+    QEMU_CFLAGS="$QEMU_CFLAGS $vss_win32_include"
+    libs_qga="-lole32 -loleaut32 -lshlwapi -luuid -lstdc++ 
-Wl,--enable-stdcall-fixup $libs_qga"
+  else
+    if test "$vss_win32_sdk" != "" ; then
+      echo "ERROR: Please download and install Microsoft VSS SDK from"
+      echo "ERROR: 
http://www.microsoft.com/en-us/download/details.aspx?id=23490";
+      feature_not_found "VSS support"
+    fi
+    guest_agent_with_vss="no"
+  fi
+fi
+
+##########################################
 
 ##########################################
 # check if we have fdatasync
@@ -3343,6 +3380,7 @@ echo "usb net redir     $usb_redir"
 echo "OpenGL support    $opengl"
 echo "libiscsi support  $libiscsi"
 echo "build guest agent $guest_agent"
+echo "QGA VSS support   $guest_agent_with_vss"
 echo "seccomp support   $seccomp"
 echo "coroutine backend $coroutine_backend"
 echo "GlusterFS support $glusterfs"
@@ -3404,6 +3442,9 @@ if test "$mingw32" = "yes" ; then
   version_micro=0
   echo 
"CONFIG_FILEVERSION=$version_major,$version_minor,$version_subminor,$version_micro"
 >> $config_host_mak
   echo 
"CONFIG_PRODUCTVERSION=$version_major,$version_minor,$version_subminor,$version_micro"
 >> $config_host_mak
+  if test "$guest_agent_with_vss" = "yes" ; then
+    echo "CONFIG_QGA_VSS=y" >> $config_host_mak
+  fi
 else
   echo "CONFIG_POSIX=y" >> $config_host_mak
 fi