[Qemu-devel] [PATCH] Check availability of uuid header / library

[Stefan Weil]

If available, the Universally Unique Identifier library
is used by the vdi block driver.

Other parts of QEMU (vl.c) could also use it.

This is an updated version of my previous patch
with changes needed by the current QEMU configuration
standard.

Signed-off-by: Stefan Weil <address@hidden>
---
 block/vdi.c |    4 ++--
 configure   |   36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/block/vdi.c b/block/vdi.c
index f5e38db..45aa81c 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -53,7 +53,7 @@
 #include "block_int.h"
 #include "module.h"
 
-#if defined(HAVE_UUID_H)
+#if defined(CONFIG_UUID)
 #include <uuid/uuid.h>
 #else
 /* TODO: move uuid emulation to some central place in QEMU. */
@@ -116,7 +116,7 @@ void uuid_unparse(const uuid_t uu, char *out);
 /* Unallocated blocks use this index (no need to convert endianess). */
 #define VDI_UNALLOCATED UINT32_MAX
 
-#if !defined(HAVE_UUID_H)
+#if !defined(CONFIG_UUID)
 void uuid_generate(uuid_t out)
 {
     memset(out, 0, sizeof(out));
diff --git a/configure b/configure
index fb5b6bb..33521d1 100755
--- a/configure
+++ b/configure
@@ -187,6 +187,7 @@ kvm=""
 nptl=""
 sdl=""
 sparse="no"
+uuid=""
 vde=""
 vnc_tls=""
 vnc_sasl=""
@@ -451,6 +452,10 @@ for opt do
   ;;
   --disable-slirp) slirp="no"
   ;;
+  --disable-uuid) uuid="no"
+  ;;
+  --enable-uuid) uuid="yes"
+  ;;
   --disable-vde) vde="no"
   ;;
   --enable-vde) vde="yes"
@@ -695,6 +700,8 @@ echo "  --fmod-inc               path to FMOD includes"
 echo "  --oss-lib                path to OSS library"
 echo "  --enable-uname-release=R Return R for uname -r in usermode emulation"
 echo "  --sparc_cpu=V            Build qemu for Sparc architecture v7, v8, 
v8plus, v8plusa, v9"
+echo "  --disable-uuid           disable uuid support"
+echo "  --enable-uuid            enable uuid support"
 echo "  --disable-vde            disable support for vde network"
 echo "  --enable-vde             enable support for vde network"
 echo "  --disable-linux-aio      disable Linux AIO support"
@@ -1047,6 +1054,31 @@ if compile_prog "" "" ; then
 fi
 
 ##########################################
+# uuid_generate() probe, used for vdi block driver
+if test "$uuid" != "no" ; then
+  uuid_libs="-luuid"
+  cat > $TMPC << EOF
+#include <uuid/uuid.h>
+int main(void)
+{
+    uuid_t my_uuid;
+    uuid_generate(my_uuid);
+    return 0;
+}
+EOF
+  if compile_prog "" "$uuid_libs" ; then
+    uuid="yes"
+    libs_softmmu="$uuid_libs $libs_softmmu"
+    libs_tools="$uuid_libs $libs_tools"
+  else
+    if test "$uuid" = "yes" ; then
+      feature_not_found "uuid"
+    fi
+    uuid=no
+  fi
+fi
+
+##########################################
 # vde libraries probe
 if test "$vde" != "no" ; then
   vde_libs="-lvdeplug"
@@ -1751,6 +1783,7 @@ echo "KVM support       $kvm"
 echo "fdt support       $fdt"
 echo "preadv support    $preadv"
 echo "fdatasync         $fdatasync"
+echo "uuid support      $uuid"
 
 if test $sdl_too_old = "yes"; then
 echo "-> Your SDL version is too old - please upgrade to have SDL support"
@@ -1861,6 +1894,9 @@ fi
 if test "$fnmatch" = "yes" ; then
   echo "CONFIG_FNMATCH=y" >> $config_host_mak
 fi
+if test "$uuid" = "yes" ; then
+  echo "CONFIG_UUID=y" >> $config_host_mak
+fi
 qemu_version=`head $source_path/VERSION`
 echo "VERSION=$qemu_version" >>$config_host_mak
 echo "PKGVERSION=$pkgversion" >>$config_host_mak
-- 
1.5.6.5