From ec482840b9d651ddadb0aae39e4a8a9b77260725 Mon Sep 17 00:00:00 2001
From: Vikram Auradkar <auradkar@google.com>
Date: Wed, 11 May 2022 13:59:27 -0700
Subject: [PATCH] crosvm: Better error message

Prints only compiled-in options

BUG=b:227659915
TEST=presubmit

Change-Id: If58013fc0d0387237da0c4ab0677efcd317a6fed
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3649737
Commit-Queue: Vikram Auradkar <auradkar@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
---
 src/main.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index 5ed80cb16d..ee684f7047 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -289,7 +289,10 @@ fn parse_gpu_options(s: Option<&str>, gpu_params: &mut GpuParameters) -> argumen
                         return Err(argument::Error::InvalidValue {
                             value: v.to_string(),
                             expected: String::from(
+                                #[cfg(feature = "gfxstream")]
                                 "gpu parameter 'backend' should be one of (2d|virglrenderer|gfxstream)",
+                                #[cfg(not(feature = "gfxstream"))]
+                                "gpu parameter 'backend' should be one of (2d|3d)",
                             ),
                         });
                     }