qemu: backport a patch to fix meson 0.58 builds

(From OE-Core rev: fe6889ed05edf2f1e4ac7b06debd4cc43ebb9607)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/qemu/qemu.inc

@@ -57,6 +57,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
            file://CVE-2020-27821.patch \
            file://CVE-2021-20263.patch \
            file://CVE-2021-3392.patch \
+           file://0001-configure-fix-detection-of-gdbus-codegen.patch \
            "
 UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
 

meta/recipes-devtools/qemu/qemu/0001-configure-fix-detection-of-gdbus-codegen.patch

@@ -0,0 +1,53 @@
+From 464cfc64201b21386030b8f353fe9724a3413a85 Mon Sep 17 00:00:00 2001
+From: Paolo Bonzini <pbonzini@redhat.com>
+Date: Wed, 5 May 2021 10:15:34 -0400
+Subject: [PATCH] configure: fix detection of gdbus-codegen
+
+"pkg-config --variable=gdbus_codegen gio-2.0" returns "gdbus-codegen",
+and it does not pass test -x (which does not walk the path).
+
+Meson 0.58.0 notices that something is iffy, as the dbus_vmstate1
+assignment in tests/qtest/meson.build uses an empty string as the
+command, and fails very eloquently:
+
+../tests/qtest/meson.build:92:2: ERROR: No program name specified.
+
+Use the "has" function instead of test -x, and fix the generation
+of config-host.mak since meson.build expects that GDBUS_CODEGEN
+is absent, rather than empty, if the tool is unavailable.
+
+Reported-by: Sebastian Mitterle <smitterl@redhat.com>
+Fixes: #178
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+Upstream-Status: Backport [https://git.qemu.org/?p=qemu.git;a=commitdiff;h=5ecfb76ccc056eb6127e44268e475827ae73b9e0]
+(not in 6.0.0, should be kept when upgrading)
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+---
+ configure | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/configure b/configure
+index 18c26e0389..4c36e221d3 100755
+--- a/configure
++++ b/configure
+@@ -3496,7 +3496,7 @@ if $pkg_config --atleast-version=$glib_req_ver gio-2.0; then
+     gio_cflags=$($pkg_config --cflags gio-2.0)
+     gio_libs=$($pkg_config --libs gio-2.0)
+     gdbus_codegen=$($pkg_config --variable=gdbus_codegen gio-2.0)
+-    if [ ! -x "$gdbus_codegen" ]; then
++    if ! has "$gdbus_codegen"; then
+         gdbus_codegen=
+     fi
+     # Check that the libraries actually work -- Ubuntu 18.04 ships
+@@ -6172,6 +6172,8 @@ if test "$gio" = "yes" ; then
+     echo "CONFIG_GIO=y" >> $config_host_mak
+     echo "GIO_CFLAGS=$gio_cflags" >> $config_host_mak
+     echo "GIO_LIBS=$gio_libs" >> $config_host_mak
++fi
++if test "$gdbus_codegen" != "" ; then
+     echo "GDBUS_CODEGEN=$gdbus_codegen" >> $config_host_mak
+ fi
+ echo "CONFIG_TLS_PRIORITY=\"$tls_priority\"" >> $config_host_mak
+-- 
+2.24.0
+