configure: preserve qemu-ga variables

Ensure that qemu-ga variables set at configure time are kept
later when the script is rerun.  For preserve_env to work,
the variables need to be empty so move the default values
to config-host.mak generation.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/configure b/configure
index ed4038ba10bbb4256b8c6402a25df7ba9018e551..3f7d07d4becef7d17fd9d89da5eaba7b8a7a0004 100755 (executable)
--- a/configure
+++ b/configure
@@ -2227,20 +2227,6 @@ if test "$have_ubsan" = "yes"; then
   QEMU_LDFLAGS="-fsanitize=undefined $QEMU_LDFLAGS"
 fi
 
-##########################################
-# Guest agent Windows MSI package
-
-if test "$QEMU_GA_MANUFACTURER" = ""; then
-  QEMU_GA_MANUFACTURER=QEMU
-fi
-if test "$QEMU_GA_DISTRO" = ""; then
-  QEMU_GA_DISTRO=Linux
-fi
-if test "$QEMU_GA_VERSION" = ""; then
-    QEMU_GA_VERSION=$(cat "$source_path"/VERSION)
-fi
-
-
 #######################################
 # cross-compiled firmware targets
 
@@ -2336,9 +2322,9 @@ if test "$debug_tcg" = "yes" ; then
 fi
 if test "$mingw32" = "yes" ; then
   echo "CONFIG_WIN32=y" >> $config_host_mak
-  echo "QEMU_GA_MANUFACTURER=${QEMU_GA_MANUFACTURER}" >> $config_host_mak
-  echo "QEMU_GA_DISTRO=${QEMU_GA_DISTRO}" >> $config_host_mak
-  echo "QEMU_GA_VERSION=${QEMU_GA_VERSION}" >> $config_host_mak
+  echo "QEMU_GA_MANUFACTURER=${QEMU_GA_MANUFACTURER-QEMU}" >> $config_host_mak
+  echo "QEMU_GA_DISTRO=${QEMU_GA_DISTRO-Linux}" >> $config_host_mak
+  echo "QEMU_GA_VERSION=${QEMU_GA_VERSION-$(cat "$source_path"/VERSION)}" >> $config_host_mak
 else
   echo "CONFIG_POSIX=y" >> $config_host_mak
 fi
@@ -2653,6 +2639,9 @@ preserve_env PKG_CONFIG
 preserve_env PKG_CONFIG_LIBDIR
 preserve_env PKG_CONFIG_PATH
 preserve_env PYTHON
+preserve_env QEMU_GA_MANUFACTURER
+preserve_env QEMU_GA_DISTRO
+preserve_env QEMU_GA_VERSION
 preserve_env SDL2_CONFIG
 preserve_env SMBD
 preserve_env STRIP