Convert GN source_set to static_library.

dl/BUILD.gn

 # Copyright 2014 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/android/config.gni")
 import("//build/config/arm.gni")
 
 declare_args() {
   # Override this value to build with small float FFT tables
   openmax_big_float_fft = true
@@ skipping 20 matching lines @@
     if (is_android) {
       rebased_android_toolchain_root =
           rebase_path(android_toolchain_root, root_build_dir)
       # Else /usr/bin/as gets picked up.
       asmflags += [ "-B${rebased_android_toolchain_root}/bin" ]
     }
   }
 }
 
 # GYP: third_party/openmax_dl/dl/dl.gyp:openmax_dl
-source_set("dl") {
+static_library("dl") {
   public_configs = [ ":dl_config" ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
   sources = [
     "api/omxtypes.h",
     "sp/api/omxSP.h",
     "sp/src/armSP_FFT_F32TwiddleTable.c",
   ]
 
   cflags = []
@@ skipping 117 matching lines @@
       "sp/src/mips/omxSP_FFTInit_R_F32.c",
       "sp/src/mips/omxSP_FFTInv_CCSToR_F32_Sfs.c",
     ]
   }
 }
 
 if (current_cpu == "arm") {
   # GYP: third_party/openmax_dl/dl/dl.gyp:openmax_dl_armv7
   # Non-NEON implementation of FFT. This library is NOT
   # standalone. Applications must link with openmax_dl.
-  source_set("openmax_dl_armv7") {
+  static_library("openmax_dl_armv7") {
     configs += [ ":dl_config" ]
     visibility = [ ":*" ]
 
     sources = [
       # Complex floating-point FFT
       "sp/src/arm/armv7/armSP_FFT_CToC_FC32_Radix2_fs_unsafe_s.S",
       "sp/src/arm/armv7/armSP_FFT_CToC_FC32_Radix4_fs_unsafe_s.S",
       "sp/src/arm/armv7/armSP_FFT_CToC_FC32_Radix4_unsafe_s.S",
       "sp/src/arm/armv7/armSP_FFT_CToC_FC32_Radix8_fs_unsafe_s.S",
       "sp/src/arm/armv7/omxSP_FFTInv_CToC_FC32_Sfs_s.S",
@@ skipping 10 matching lines @@
       # To get the __android_log_print routine
       libs = [ "log" ]
       # Detection routine
       sources += [ "sp/src/arm/detect.c" ]
     }
   }
 
   # GYP: third_party/openmax_dl/dl/dl.gyp:openmax_dl_neon
   # NEON implementation of FFT. This library is NOT
   # standalone. Applications must link with openmax_dl.
-  source_set("openmax_dl_neon") {
+  static_library("openmax_dl_neon") {
     configs += [ ":dl_config" ]
     visibility = [ ":*" ]
 
     if (!arm_use_neon) {
       configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
       asmflags = [ "-mfpu=neon" ]
     }
 
     sources = [
       # Complex 32-bit fixed-point FFT.
@@ skipping 42 matching lines @@
       "sp/src/arm/neon/omxSP_FFTFwd_CToC_FC32_Sfs_s.S",
       "sp/src/arm/neon/omxSP_FFTInv_CToC_FC32_Sfs_s.S",
 
       # Real floating-point FFT
       "sp/src/arm/neon/armSP_FFTInv_CCSToR_F32_preTwiddleRadix2_unsafe_s.S",
       "sp/src/arm/neon/omxSP_FFTFwd_RToCCS_F32_Sfs_s.S",
       "sp/src/arm/neon/omxSP_FFTInv_CCSToR_F32_Sfs_s.S",
     ]
   }
 }