[libvirt] [PATCH V2 1/2] libxl: drop support for Xen < 4.6

[Jim Fehlig]

Currently the libxl driver claims support for Xen >= 4.4, but
Xen 4.4 and 4.5 are no longer supported upstream. Let's increase
the minimum supported version to 4.6.

Since Xen 4.6 contains a pkgconfig file, drop the now unused code
that falls back to using LIBVIRT_CHECK_LIB in the absence of
pkgconfig file.

Signed-off-by: Jim Fehlig <jfehlig at suse.com>
---
 docs/drvxen.html.in     |  2 +-
 m4/virt-driver-libxl.m4 | 22 +---------------------
 2 files changed, 2 insertions(+), 22 deletions(-)

diff --git a/docs/drvxen.html.in b/docs/drvxen.html.in
index 2e45e09527..ff67291ec6 100644
--- a/docs/drvxen.html.in
+++ b/docs/drvxen.html.in
@@ -8,7 +8,7 @@
 
     <p>
       The libvirt libxl driver provides the ability to manage virtual
-      machines on any Xen release from 4.4.0 onwards.
+      machines on any Xen release from 4.6.0 onwards.
     </p>
 
     <h2><a id="project">Project Links</a></h2>
diff --git a/m4/virt-driver-libxl.m4 b/m4/virt-driver-libxl.m4
index 90338eb306..fa51afd2f8 100644
--- a/m4/virt-driver-libxl.m4
+++ b/m4/virt-driver-libxl.m4
@@ -29,33 +29,13 @@ AC_DEFUN([LIBVIRT_DRIVER_CHECK_LIBXL], [
   LIBXL_API_VERSION="-DLIBXL_API_VERSION=0x040400"
 
   dnl search for libxl, aka libxenlight
-  dnl Xen > 4.5 introduced a pkgconfig file, check for it first
   old_with_libxl="$with_libxl"
-  LIBVIRT_CHECK_PKG([LIBXL], [xenlight], [4.4.0], [true])
+  LIBVIRT_CHECK_PKG([LIBXL], [xenlight], [4.6.0], [true])
   if test "x$with_libxl" = "xyes" ; then
     LIBXL_FIRMWARE_DIR=$($PKG_CONFIG --variable xenfirmwaredir xenlight)
     LIBXL_EXECBIN_DIR=$($PKG_CONFIG --variable libexec_bin xenlight)
   fi
 
-  dnl pkgconfig file not found, fallback to lib probe
-  if test "x$with_libxl" = "xno" ; then
-    with_libxl="$old_with_libxl"
-
-    dnl LIBXL_API_VERSION 4.4.0 introduced a new parameter to
-    dnl libxl_domain_create_restore for specifying restore parameters.
-    dnl The libxl driver will make use of this new parameter for specifying
-    dnl the Xen migration stream version. Specify LIBXL_API_VERSION to trigger
-    dnl an error if there is too old xenlight
-    libxlold_CFLAGS="$CFLAGS"
-    CFLAGS="$CFLAGS $LIBXL_API_VERSION"
-    LIBVIRT_CHECK_LIB([LIBXL], [xenlight], [libxl_ctx_alloc], [libxl.h], [fail="1"])
-    CFLAGS="$libxlold_CFLAGS"
-
-    if test $fail = 1; then
-      AC_MSG_ERROR([You must install the libxl Library from Xen >= 4.4 to compile libxenlight driver with -lxl])
-    fi
-  fi
-
   if test "$with_libxl" = "yes"; then
     old_LIBS="$LIBS"
     old_CFLAGS="$CFLAGS"
-- 
2.18.0