[PATCH 1/2] runqemu: set host DRI driver path for all instances of virgl usage

["Alexander Kanavin" <alex.kanavin@gmail.com>]

Falling through to host GL stack via epoxy chrpath hack was
found to be problematic in case of SDL particularly (because it does
not actually use epoxy, and does its own dlopen()).

So let's just use the mesa-native libraries everywhere, but instruct
them to load DRI drivers from the host.

NVidia's proprietary blob users have to take care of themselves, I'm afraid.

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
---
 scripts/runqemu | 37 ++++++++++++++++++++++---------------
 1 file changed, 22 insertions(+), 15 deletions(-)

diff --git a/scripts/runqemu b/scripts/runqemu
index 310d79fdc5..7eb7a9c7b4 100755
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -420,6 +420,23 @@ class BaseConfig(object):
             logger.error("%s not a directory valid DEPLOY_DIR_IMAGE" % deploy_dir_image)
             self.set("MACHINE", arg)
 
+    def set_dri_path(self):
+        # As runqemu can be run within bitbake (when using testimage, for example),
+        # we need to ensure that we run host pkg-config, and that it does not
+        # get mis-directed to native build paths set by bitbake.
+        try:
+            del os.environ['PKG_CONFIG_PATH']
+            del os.environ['PKG_CONFIG_DIR']
+            del os.environ['PKG_CONFIG_LIBDIR']
+            del os.environ['PKG_CONFIG_SYSROOT_DIR']
+        except KeyError:
+            pass
+        try:
+            dripath = subprocess.check_output("PATH=/bin:/usr/bin:$PATH pkg-config --variable=dridriverdir dri", shell=True)
+        except subprocess.CalledProcessError as e:
+            raise RunQemuError("Could not determine the path to dri drivers on the host via pkg-config.\nPlease install Mesa development files (particularly, dri.pc) on the host machine.")
+        os.environ['LIBGL_DRIVERS_PATH'] = dripath.decode('utf-8').strip()
+
     def check_args(self):
         for debug in ("-d", "--debug"):
             if debug in sys.argv:
@@ -440,15 +457,19 @@ class BaseConfig(object):
                 self.kernel_cmdline_script += ' console=ttyS0'
             elif arg == 'sdl':
                 if 'gl' in sys.argv[1:]:
+                    self.set_dri_path()
                     self.qemu_opt_script += ' -vga virtio -display sdl,gl=on'
                 elif 'gl-es' in sys.argv[1:]:
+                    self.set_dri_path()
                     self.qemu_opt_script += ' -vga virtio -display sdl,gl=es'
                 else:
                     self.qemu_opt_script += ' -display sdl'
             elif arg == 'gtk':
                 if 'gl' in sys.argv[1:]:
+                    self.set_dri_path()
                     self.qemu_opt_script += ' -vga virtio -display gtk,gl=on'
                 elif 'gl-es' in sys.argv[1:]:
+                    self.set_dri_path()
                     self.qemu_opt_script += ' -vga virtio -display gtk,gl=es'
                 else:
                     self.qemu_opt_script += ' -display gtk'
@@ -456,22 +477,8 @@ class BaseConfig(object):
                 # These args are handled inside sdl or gtk blocks above
                 pass
             elif arg == 'egl-headless':
+                self.set_dri_path()
                 self.qemu_opt_script += ' -vga virtio -display egl-headless'
-                # As runqemu can be run within bitbake (when using testimage, for example),
-                # we need to ensure that we run host pkg-config, and that it does not
-                # get mis-directed to native build paths set by bitbake.
-                try:
-                    del os.environ['PKG_CONFIG_PATH']
-                    del os.environ['PKG_CONFIG_DIR']
-                    del os.environ['PKG_CONFIG_LIBDIR']
-                    del os.environ['PKG_CONFIG_SYSROOT_DIR']
-                except KeyError:
-                    pass
-                try:
-                    dripath = subprocess.check_output("PATH=/bin:/usr/bin:$PATH pkg-config --variable=dridriverdir dri", shell=True)
-                except subprocess.CalledProcessError as e:
-                    raise RunQemuError("Could not determine the path to dri drivers on the host via pkg-config.\nPlease install Mesa development files (particularly, dri.pc) on the host machine.")
-                os.environ['LIBGL_DRIVERS_PATH'] = dripath.decode('utf-8').strip()
             elif arg == 'serial':
                 self.kernel_cmdline_script += ' console=ttyS0'
                 self.serialconsole = True
-- 
2.26.1