From ded91614ab3713d443d8d8d7db2edadb17e3f5cb Mon Sep 17 00:00:00 2001
From: Julian Smith <jules@op59.net>
Date: Sat, 5 Jun 2021 12:29:47 +0100
Subject: [PATCH] simgear/debug/logstream.cxx: enable file:line on startup if
 SG_LOG_FILE_LINE is 1.

E.g. allows file:line in diagnostics when running test-suite.
---
 simgear/debug/logstream.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/simgear/debug/logstream.cxx b/simgear/debug/logstream.cxx
index 36b5650c..cb7881e3 100644
--- a/simgear/debug/logstream.cxx
+++ b/simgear/debug/logstream.cxx
@@ -299,6 +299,10 @@ public:
             m_consoleCallbacks.push_back(m_callbacks.back());
         }
 #endif
+        const char* fl = getenv("SG_LOG_FILE_LINE");
+        if (fl && !strcmp(fl, "1")) {
+            m_fileLine = true;
+        }
     }
 
     ~LogStreamPrivate()