configure: expand ${prefix} in create_config

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
diff --git a/configure b/configure
index c99461a..9d8b4b3 100755
--- a/configure
+++ b/configure
@@ -2073,8 +2073,7 @@
 echo "datadir=$datadir" >> $config_host_mak
 echo "sysconfdir=$sysconfdir" >> $config_host_mak
 echo "docdir=$docdir" >> $config_host_mak
-echo "CONFIG_QEMU_SHAREDIR=\"$prefix$datasuffix\"" >> $config_host_mak
-echo "CONFIG_QEMU_CONFDIR=\"$confdir\"" >> $config_host_mak
+echo "confdir=$confdir" >> $config_host_mak
 
 case "$cpu" in
   i386|x86_64|alpha|cris|hppa|ia64|m68k|microblaze|mips|mips64|ppc|ppc64|s390|s390x|sparc|sparc64)
diff --git a/create_config b/create_config
index edcad25..23c0cd5 100755
--- a/create_config
+++ b/create_config
@@ -13,6 +13,15 @@
     pkgversion=${line#*=}
     echo "#define QEMU_PKGVERSION \"$pkgversion\""
     ;;
+ prefix=* | *dir=*) # directory configuration
+    name=${line%=*}
+    value=${line#*=}
+    define_name=`echo $name | tr '[:lower:]' '[:upper:]'`
+    eval "define_value=\"$value\""
+    echo "#define CONFIG_QEMU_$define_name \"$define_value\""
+    # save for the next definitions
+    eval "$name=\$define_value"
+    ;;
  CONFIG_AUDIO_DRIVERS=*)
     drivers=${line#*=}
     echo "#define CONFIG_AUDIO_DRIVERS \\"
diff --git a/vl.c b/vl.c
index 7121cd0..6d08ec8 100644
--- a/vl.c
+++ b/vl.c
@@ -3423,7 +3423,7 @@
     }
     /* If all else fails use the install patch specified when building.  */
     if (!data_dir) {
-        data_dir = CONFIG_QEMU_SHAREDIR;
+        data_dir = CONFIG_QEMU_DATADIR;
     }
 
     /*