Strip dead code on all Release builds.

Today we do this only on Windows (/OPT:REF).

This extends to Mac-likes (-dead_strip) and non-Macs
(-ffunction-sections, -fdata-sections, -Wl,--gc-sections).

Should be no harm passing -ffunction-sections and -fdata-sections on Mac too.

CQ_INCLUDE_TRYBOTS=skia.primary:Build-Ubuntu-Clang-x86_64-Release-Mini

Change-Id: I3a1b41be1d258ff509b0355215cb25dab47db57b
Reviewed-on: https://skia-review.googlesource.com/8307
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/gn/BUILD.gn b/gn/BUILD.gn
index 43c5928730..37852251cb 100644
--- a/gn/BUILD.gn
+++ b/gn/BUILD.gn
@@ -394,8 +394,15 @@ config("release") {
   } else {
     cflags = [
       "-O3",
+      "-fdata-sections",
+      "-ffunction-sections",
       "-momit-leaf-frame-pointer",
     ]
+    if (is_mac || is_ios) {
+      ldflags = [ "-dead_strip" ]
+    } else {
+      ldflags = [ "-Wl,--gc-sections" ]
+    }
   }
   defines = [ "NDEBUG" ]
 }