Viewer on Mac.

  - Support ObjC / ObjC++
  - Build SDL on Mac.
  - Build viewer on Mac.

Patched from Jim's CL.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3760

Change-Id: I12663f2ed2969e22f51aefed560fbc22b2524167
Reviewed-on: https://skia-review.googlesource.com/3760
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/gn/BUILD.gn b/gn/BUILD.gn
index 0ea41a8253..5d6a82ae38 100644
--- a/gn/BUILD.gn
+++ b/gn/BUILD.gn
@@ -200,6 +200,7 @@ config("default") {
 config("warnings") {
   cflags = []
   cflags_cc = []
+  cflags_objc = []
   if (is_win) {
     cflags += [
       "/W3",  # Turn on lots of warnings.
@@ -288,6 +289,10 @@ config("warnings") {
         "-Wno-c++98-compat-pedantic",
         "-Wno-undefined-func-template",
       ]
+      cflags_objc += [
+        "-Wno-direct-ivar-access",
+        "-Wno-objc-interface-ivars",
+      ]
     }
   }
 }
@@ -484,6 +489,26 @@ toolchain("gcc_like") {
     description = "compile {{source}}"
   }
 
+  tool("objc") {
+    depfile = "{{output}}.d"
+    command = "$cc_wrapper $cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_objc}} -c {{source}} -o {{output}}"
+    depsformat = "gcc"
+    outputs = [
+      "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
+    ]
+    description = "compile {{source}}"
+  }
+
+  tool("objcxx") {
+    depfile = "{{output}}.d"
+    command = "$cc_wrapper $cxx -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} {{cflags_objc}} -c {{source}} -o {{output}}"
+    depsformat = "gcc"
+    outputs = [
+      "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
+    ]
+    description = "compile {{source}}"
+  }
+
   tool("asm") {
     depfile = "{{output}}.d"
     command = "$cc_wrapper $cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{asmflags}} -c {{source}} -o {{output}}"