diff -up mesa-19.2.0-rc3/meson.build.2~ mesa-19.2.0-rc3/meson.build
--- mesa-19.2.0-rc3/meson.build.2~	2019-09-11 18:23:35.000000000 +0200
+++ mesa-19.2.0-rc3/meson.build	2019-09-13 01:42:07.786526054 +0200
@@ -125,8 +125,8 @@ if dri_drivers.contains('auto')
     # TODO: PPC, Sparc
     if ['x86', 'x86_64'].contains(host_machine.cpu_family())
       dri_drivers = ['i915', 'i965', 'r100', 'r200', 'nouveau']
-    elif ['arm', 'aarch64'].contains(host_machine.cpu_family())
-      dri_drivers = []
+    elif ['arm', 'aarch64', 'riscv64'].contains(host_machine.cpu_family())
+      dri_drivers = ['r100', 'r200', 'nouveau']
     else
       error('Unknown architecture @0@. Please pass -Ddri-drivers to set driver options. Patches gladly accepted to fix this.'.format(
             host_machine.cpu_family()))
@@ -160,7 +160,13 @@ if gallium_drivers.contains('auto')
     elif ['arm', 'aarch64'].contains(host_machine.cpu_family())
       gallium_drivers = [
         'kmsro', 'v3d', 'vc4', 'freedreno', 'etnaviv', 'nouveau',
-        'tegra', 'virgl', 'lima', 'panfrost', 'swrast'
+        'tegra', 'virgl', 'lima', 'panfrost', 'swrast',
+        'r300', 'r600', 'radeonsi'
+      ]
+    elif ['riscv64'].contains(host_machine.cpu_family())
+      gallium_drivers = [
+        'nouveau', 'swrast',
+        'r300', 'r600', 'radeonsi'
       ]
     else
       error('Unknown architecture @0@. Please pass -Dgallium-drivers to set driver options. Patches gladly accepted to fix this.'.format(
@@ -215,8 +221,8 @@ if _vulkan_drivers.contains('auto')
   if system_has_kms_drm
     if host_machine.cpu_family().startswith('x86')
       _vulkan_drivers = ['amd', 'intel']
-    elif ['arm', 'aarch64'].contains(host_machine.cpu_family())
-      _vulkan_drivers = []
+    elif ['arm', 'aarch64', 'riscv64'].contains(host_machine.cpu_family())
+      _vulkan_drivers = ['amd']
     else
       error('Unknown architecture @0@. Please pass -Dvulkan-drivers to set driver options. Patches gladly accepted to fix this.'.format(
             host_machine.cpu_family()))