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(-)

Index: qemu-6.0.0/configure
===================================================================
--- qemu-6.0.0.orig/configure
+++ qemu-6.0.0/configure
@@ -3366,7 +3366,7 @@ if ! test "$gio" = "no"; then
         gio_cflags=$($pkg_config --cflags gio-2.0)
         gio_libs=$($pkg_config --libs gio-2.0)
         gdbus_codegen=$($pkg_config --variable=gdbus_codegen gio-2.0)
-        if [ ! -x "$gdbus_codegen" ]; then
+        if ! has "$gdbus_codegen"; then
             gdbus_codegen=
         fi
         # Check that the libraries actually work -- Ubuntu 18.04 ships
@@ -5704,6 +5704,8 @@ if test "$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
