For building v8 using gn on aix_ppc64, linux_s390x and linux_ppc64.

build/config/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/allocator.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/features.gni")
@@ skipping 274 matching lines @@
   } else if (is_mac) {
     configs += [
       "//build/config/mac:mac_dynamic_flags",
       "//build/config/mac:mac_executable_flags",
     ]
   } else if (is_ios) {
     configs += [
       "//build/config/ios:ios_dynamic_flags",
       "//build/config/ios:ios_executable_flags",
     ]
-  } else if (is_linux || is_android) {
+  } else if (is_linux || is_android || current_os == "aix") {
     configs += [ "//build/config/gcc:executable_ldconfig" ]
     if (is_android) {
       configs += [ "//build/config/android:executable_config" ]
     } else if (is_chromecast) {
       configs += [ "//build/config/chromecast:executable_config" ]
     }
   }
 
   # If we're using the prebuilt instrumented libraries with the sanitizers, we
   # need to add ldflags to every binary to make sure they are picked up.
@@ skipping 54 matching lines @@
       # variant for each language used in the target).
       precompiled_source = "//build/precompile.cc"
 
       # Force include the header.
       cflags = [ "/FI$precompiled_header" ]
     } else if (is_mac) {
       precompiled_source = "//build/precompile.h"
     }
   }
 }