Build nacl_helper_nonsfi with GN

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 6b1e8979e35fe5f1352ff36680b6cb79ddcf7525..6fb09b89afa0f17a55cb10b71c550d4266204945 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -450,6 +450,30 @@ config("compiler_cpu_abi") {
         ]
         ldflags += [ "-mips64r2" ]
       }
+    } else if (current_cpu == "pnacl" && is_nacl_nonsfi) {
+      if (target_cpu == "x86" || target_cpu == "x64") {
+        cflags += [
+          "-arch",
+          "x86-32-nonsfi",
+          "--pnacl-bias=x86-32-nonsfi",
+          "--target=i686-unknown-nacl",
+        ]
+        ldflags += [
+          "-arch",
+          "x86-32-nonsfi",
+          "--target=i686-unknown-nacl",
+        ]
+      } else if (target_cpu == "arm") {
+        cflags += [
+          "-arch",
+          "arm-nonsfi",
+          "--pnacl-bias=arm-nonsfi",
+        ]
+        ldflags += [
+          "-arch",
+          "arm-nonsfi",
+        ]
+      }
     }
   }
 
@@ -758,6 +782,13 @@ config("default_warnings") {
         "-Wno-bitfield-width",
       ]
     }
+
+    if (is_nacl_nonsfi) {
+      cflags += [
+        # TODO(phosek): Enable this after fixing NaCl IRT.
+        "-Wno-sign-compare",

[brettw, 2015/10/25 08:45:33]

Since this is already fixed, I'm OK adding is a temporary measure. But can this
comment be specific about when this can be removed (i.e. link to the code review
and say it can be removed when that's rolled in) in case you forget and somebody
comes along later looking at it.

[Petr Hosek, 2015/10/25 22:50:48]

Done.

+      ]
+    }
   }
 }