libchrome: Add -Wno-unreachable-code.

During the preparation of SCons -> gn migration for libchrome,
-Wunreachable-code is set by default
https://chromium.git.corp.google.com/chromiumos/platform2/+/8eb370f60f962801a98efce8dd3b3ec84048ebd0
which causes a build failure of libchrome.

BUG=chromium:807158
TEST=Build locally.

Change-Id: Ic71cb7a94fec1084c7164738268b103f32019e0c
Reviewed-on: https://chromium-review.googlesource.com/1377819
Commit-Ready: Hidehiko Abe <hidehiko@chromium.org>
Tested-by: Hidehiko Abe <hidehiko@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/BUILD.gn b/BUILD.gn
index 7df846a0e..6c310b9bd 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -13,7 +13,11 @@ group("all") {
 
 # Suppressing warning in base/strings/stringprintf.cc.
 config("base_core_config") {
-  cflags = [ "-Wno-format-nonliteral" ]
+  cflags = [
+    "-Wno-format-nonliteral",
+    # This is for _exit(1) in base/debug/debugger_posix.cc.
+    "-Wno-unreachable-code",
+  ]
 }
 
 libbase_sublibs = [