From c929f5c967cd8347719e8377142a7f01557c3d64 Mon Sep 17 00:00:00 2001
From: Bill Thiede <wathiede@google.com>
Date: Thu, 10 Oct 2019 19:55:25 -0700
Subject: [PATCH] Error if profiling disabled and -pprof specifed.

---
 rtiow/src/bin/tracer.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rtiow/src/bin/tracer.rs b/rtiow/src/bin/tracer.rs
index 293b3cb..9c3e3e6 100644
--- a/rtiow/src/bin/tracer.rs
+++ b/rtiow/src/bin/tracer.rs
@@ -97,6 +97,9 @@ fn main() -> Result<(), std::io::Error> {
     let opt = Opt::from_args();
     let scene = opt.model.scene(&opt);
     fs::create_dir_all(&opt.output)?;
+    if opt.pprof.is_some() && !cfg!(feature = "profile") {
+        panic!("profiling disabled at compile time, but -pprof specified");
+    }
     if let Some(ref pprof_path) = opt.pprof {
         PROFILER
             .lock()