Metal: Use -weak_framework to support OS 10.10.

This OS is still tested in Chromium configurations. e.g.: https://ci.chromium.org/p/chromium/builders/ci/Mac10.10%20Tests/47668 Bug: chromium:1014228 Bug: angleproject:2634 Change-Id: Iadefd461ba8bbaec03dcc711227580f6ecdcad6a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1860105 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

Metal: Use -weak_framework to support OS 10.10.
e7b5c5e9 · Jamie Madill · da1f90aa · e7b5c5e9
Commit e7b5c5e9 authored Oct 14, 2019 by Jamie Madill
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BUILD.gn src/libANGLE/renderer/metal/BUILD.gn +5 -1

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--- a/src/libANGLE/renderer/metal/BUILD.gn
+++ b/src/libANGLE/renderer/metal/BUILD.gn
@@ -6,6 +6,7 @@

 import("../../../../gni/angle.gni")

+assert(is_mac)
 assert(angle_enable_metal)

 _metal_backend_sources = [
@@ -65,7 +66,10 @@ angle_source_set("angle_metal_backend") {
  cflags_objc += objc_flags
  cflags_objcc += objc_flags

-  libs += [ "Metal.framework" ]
+  ldflags += [
+    "-weak_framework",
+    "Metal",
+  ]

  if (is_mac) {
    libs += [