From: Joel Rosdahl <joel@rosdahl.net>
Date: Mon, 5 Apr 2021 17:12:10 +0000 (+0200)
Subject: Disable split-dwarf code paths when outputting to /dev/null
X-Git-Tag: v4.3~20
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4caef178e00c464c4ac80372cfa607f81d516dec;p=thirdparty%2Fccache.git

Disable split-dwarf code paths when outputting to /dev/null

This avoids an attempt to delete /dev/null.dwo, which is harmless but
apparently flagged by the sandboxing feature of Gentoo’s build system.

Fixes #833.
---

diff --git a/src/argprocessing.cpp b/src/argprocessing.cpp
index e39c4e54f..a2e600bf9 100644
--- a/src/argprocessing.cpp
+++ b/src/argprocessing.cpp
@@ -1107,7 +1107,14 @@ process_args(Context& ctx)
   }
 
   if (args_info.seen_split_dwarf) {
-    args_info.output_dwo = Util::change_extension(args_info.output_obj, ".dwo");
+    if (args_info.output_obj == "/dev/null") {
+      // Outputting to /dev/null -> compiler won't write a .dwo, so just pretend
+      // we haven't seen the -gsplit-dwarf option.
+      args_info.seen_split_dwarf = false;
+    } else {
+      args_info.output_dwo =
+        Util::change_extension(args_info.output_obj, ".dwo");
+    }
   }
 
   // Cope with -o /dev/null.