Merge pull request #398 from codeWorm2015/develop

#397 modify ios cmake tool chain, add macro option for multi-platform

CMakeLists.txt

 cmake_minimum_required(VERSION 3.0)
 project(paddle-mobile)
 
-option(DEBUGING "enable debug mode" OFF)
+option(DEBUGING "enable debug mode" ON)
 option(USE_OPENMP "openmp support" OFF)
-option(USE_EXCEPTION "use std exception" OFF)
+option(USE_EXCEPTION "use std exception" ON)
+
+option(CPU "cpu" ON)
+option(MALI_GPU "mali gpu" OFF)
+option(FPGA "fpga" OFF)
+
+if (CPU)
+    add_definitions(-DPADDLE_MOBILE_CPU)
+elseif (MALI_GPU)
+    add_definitions(-DPADDLE_MOBILE_MALI_GPU)
+elseif(FPGA)
+    add_definitions(-DPADDLE_MOBILE_FPGA)
+endif()
 
 if (DEBUGING)
     set(CMAKE_BUILD_TYPE Debug)
@@ -127,8 +139,13 @@ else ()
     add_definitions(-DTRANSPOSE_OP)
 endif()
 
-
-add_library(paddle-mobile SHARED ${PADDLE_MOBILE_CC} ${PADDLE_MOBILE_H})
+if (IS_IOS)
+    add_library(paddle-mobile STATIC ${PADDLE_MOBILE_CC} ${PADDLE_MOBILE_H})
+elseif(ANDROID)
+    add_library(paddle-mobile SHARED ${PADDLE_MOBILE_CC} ${PADDLE_MOBILE_H})
+else()
+    add_library(paddle-mobile SHARED ${PADDLE_MOBILE_CC} ${PADDLE_MOBILE_H})
+endif ()
 
 if(DEBUGING)
     add_subdirectory(test)

src/framework/op_registry.h

@@ -96,24 +96,74 @@ class OpRegistry {
   }
 };
 
-#define REGISTER_OPERATOR(op_type, op_class)                                \
-  template <typename Dtype, typename T>                                     \
-  class _OpClass_##op_type##_ : public op_class<Dtype, T> {                 \
-   public:                                                                  \
-    DEFINE_OP_CONSTRUCTOR(_OpClass_##op_type##_, op_class);                 \
-  };                                                                        \
-  static paddle_mobile::framework::OperatorRegistrar<                       \
-      paddle_mobile::CPU, _OpClass_##op_type##_<paddle_mobile::CPU, float>> \
-      __op_registrar_##op_type##__(#op_type);                               \
-  int TouchOpRegistrar_##op_type() {                                        \
-    __op_registrar_##op_type##__.Touch();                                   \
-    return 0;                                                               \
+#ifdef PADDLE_MOBILE_CPU
+
+#define REGISTER_OPERATOR_CPU(op_type, op_class)                               \
+  template <typename Dtype, typename T>                                        \
+  class _OpClass_##op_type##_cpu : public op_class<Dtype, T> {                 \
+   public:                                                                     \
+    DEFINE_OP_CONSTRUCTOR(_OpClass_##op_type##_cpu, op_class);                 \
+  };                                                                           \
+  static paddle_mobile::framework::OperatorRegistrar<                          \
+      paddle_mobile::CPU, _OpClass_##op_type##_cpu<paddle_mobile::CPU, float>> \
+      __op_registrar_##op_type##__cpu(#op_type);                               \
+  int TouchOpRegistrar_##op_type##_cpu() {                                     \
+    __op_registrar_##op_type##__cpu.Touch();                                   \
+    return 0;                                                                  \
   }
 
-#define USE_OP(op_type)                                           \
-  extern int TouchOpRegistrar_##op_type();                        \
+#define USE_OP_CPU(op_type)                                       \
+  extern int TouchOpRegistrar_##op_type##_cpu();                  \
   static int use_op_itself_##op_type##_ __attribute__((unused)) = \
-      TouchOpRegistrar_##op_type()
+      TouchOpRegistrar_##op_type##_cpu()
+
+#endif
+
+#ifdef PADDLE_MOBILE_MALI_GPU
+#define REGISTER_OPERATOR_MALI_GPU(op_type, op_class)               \
+  template <typename Dtype, typename T>                             \
+  class _OpClass_##op_type##_mali_gpu : public op_class<Dtype, T> { \
+   public:                                                          \
+    DEFINE_OP_CONSTRUCTOR(_OpClass_##op_type##_mali_gpu, op_class); \
+  };                                                                \
+  static paddle_mobile::framework::OperatorRegistrar<               \
+      paddle_mobile::CPU,                                           \
+      _OpClass_##op_type##_mali_gpu<paddle_mobile::CPU, float>>     \
+      __op_registrar_##op_type##__mali_gpu(#op_type);               \
+  int TouchOpRegistrar_##op_type##_mali_gpu() {                     \
+    __op_registrar_##op_type##__mali_gpu.Touch();                   \
+    return 0;                                                       \
+  }
+
+#define USE_OP_MALI_GPU(op_type)                                  \
+  extern int TouchOpRegistrar_##op_type##_mali_gpu();             \
+  static int use_op_itself_##op_type##_ __attribute__((unused)) = \
+      TouchOpRegistrar_##op_type##_mali_gpu()
+
+#endif
+
+#ifdef PADDLE_MOBILE_FPGA
+#define REGISTER_OPERATOR_FPGA(op_type, op_class)               \
+  template <typename Dtype, typename T>                         \
+  class _OpClass_##op_type##_fpga : public op_class<Dtype, T> { \
+   public:                                                      \
+    DEFINE_OP_CONSTRUCTOR(_OpClass_##op_type##_fpga, op_class); \
+  };                                                            \
+  static paddle_mobile::framework::OperatorRegistrar<           \
+      paddle_mobile::CPU,                                       \
+      _OpClass_##op_type##_fpga<paddle_mobile::CPU, float>>     \
+      __op_registrar_##op_type##__fpga(#op_type);               \
+  int TouchOpRegistrar_##op_type##_fpga() {                     \
+    __op_registrar_##op_type##__fpga.Touch();                   \
+    return 0;                                                   \
+  }
+
+#define USE_OP_FPGA(op_type)                                      \
+  extern int TouchOpRegistrar_##op_type##_fpga();                 \
+  static int use_op_itself_##op_type##_ __attribute__((unused)) = \
+      TouchOpRegistrar_##op_type##_fpga()
+
+#endif
 
 }  // namespace framework
 }  // namespace paddle_mobile

src/framework/operator.cpp

@@ -58,7 +58,12 @@ void OperatorBase<Dtype>::Run() const {
 }
 
 template class OperatorBase<CPU>;
+template class OperatorBase<FPGA>;
+template class OperatorBase<GPU_MALI>;
+
 template class OperatorWithKernel<CPU>;
+template class OperatorWithKernel<FPGA>;
+template class OperatorWithKernel<GPU_MALI>;
 
 }  // namespace framework
 }  // namespace paddle_mobile

src/framework/operator.h

@@ -153,6 +153,7 @@ class FusionOpMatcher {
 
   std::string BeginType() { return node_.Type(); }
 
+  //  virtual  bool Fusion();
  protected:
   Node node_;
   std::string type_;

src/operators/batchnorm_op.cpp

@@ -31,7 +31,13 @@ template class BatchNormOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(batch_norm);
-REGISTER_OPERATOR(batch_norm, ops::BatchNormOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(batch_norm);
+REGISTER_OPERATOR_CPU(batch_norm, ops::BatchNormOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/box_coder_op.cpp

@@ -52,7 +52,13 @@ template class BoxCoderOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(box_coder);
-REGISTER_OPERATOR(box_coder, ops::BoxCoderOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(box_coder);
+REGISTER_OPERATOR_CPU(box_coder, ops::BoxCoderOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/concat_op.cpp

@@ -62,7 +62,13 @@ template class ConcatOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(concat);
-REGISTER_OPERATOR(concat, ops::ConcatOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(concat);
+REGISTER_OPERATOR_CPU(concat, ops::ConcatOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/conv_op.cpp

@@ -53,7 +53,17 @@ template class ConvOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(conv2d);
-REGISTER_OPERATOR(conv2d, ops::ConvOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(conv2d);
+REGISTER_OPERATOR_CPU(conv2d, ops::ConvOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+USE_OP_MALI_GPU(conv2d);
+REGISTER_OPERATOR_MALI_GPU(conv2d, ops::ConvOp);
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+USE_OP_FPGA(conv2d);
+REGISTER_OPERATOR_FPGA(conv2d, ops::ConvOp);
+#endif
 
 #endif

src/operators/depthwise_conv_op.cpp

@@ -54,7 +54,13 @@ template class DepthwiseConvOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(depthwise_conv2d);
-REGISTER_OPERATOR(depthwise_conv2d, ops::DepthwiseConvOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(depthwise_conv2d);
+REGISTER_OPERATOR_CPU(depthwise_conv2d, ops::DepthwiseConvOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/elementwise_add_op.cpp

@@ -29,7 +29,13 @@ template class ElementwiseAddOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(elementwise_add);
-REGISTER_OPERATOR(elementwise_add, ops::ElementwiseAddOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(elementwise_add);
+REGISTER_OPERATOR_CPU(elementwise_add, ops::ElementwiseAddOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/feed_op.h

@@ -43,8 +43,14 @@ class FeedOp : public framework::OperatorBase<DeviceType> {
 };
 
 namespace ops = paddle_mobile::operators;
-USE_OP(feed);
-REGISTER_OPERATOR(feed, ops::FeedOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(feed);
+REGISTER_OPERATOR_CPU(feed, ops::FeedOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 }  // namespace operators
 }  // namespace paddle_mobile

src/operators/fetch_op.h

@@ -43,8 +43,14 @@ class FetchOp : public framework::OperatorBase<DeviceType> {
 };
 
 namespace ops = paddle_mobile::operators;
-USE_OP(fetch);
-REGISTER_OPERATOR(fetch, ops::FetchOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(fetch);
+REGISTER_OPERATOR_CPU(fetch, ops::FetchOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 }  // namespace operators
 }  // namespace paddle_mobile

src/operators/fusion_conv_add.cpp

@@ -25,7 +25,13 @@ template class FushionConvAddOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(conv_add);
-REGISTER_OPERATOR(conv_add, ops::FushionConvAddOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(conv_add);
+REGISTER_OPERATOR_CPU(conv_add, ops::FushionConvAddOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/fusion_conv_add.h

@@ -64,7 +64,13 @@ class FushionConvAddOp : public framework::OperatorWithKernel<DeviceType> {
   //  FushionFcParam param_;
 };
 
-// static framework::FusionOpRegistrar fc_registrar(new FusionConvAddMatcher());
+#ifdef PADDLE_MOBILE_CPU
+static framework::FusionOpRegistrar fc_registrar(new FusionConvAddMatcher());
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 }  // namespace operators
 }  // namespace paddle_mobile

src/operators/fusion_conv_add_relu_op.h

@@ -46,8 +46,14 @@ class ConvAddReluOp {
  private:
 };
 
-// static framework::FusionOpRegistrar fc_registrar(
-//    new FushionConvAddReluOpMatcher());
+#ifdef PADDLE_MOBILE_CPU
+// static framework::FusionOpRegistrar fusion_conv_add_relu_registrar(
+//        new FushionConvAddReluOpMatcher());
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 }  // namespace operators
 }  // namespace paddle_mobile

src/operators/fusion_fc_op.cpp

@@ -54,7 +54,13 @@ template class FushionFcOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(fc);
-REGISTER_OPERATOR(fc, ops::FushionFcOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(fc);
+REGISTER_OPERATOR_CPU(fc, ops::FushionFcOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/fusion_fc_op.h

@@ -37,8 +37,6 @@ class FusionFcMatcher : public framework::FusionOpMatcher {
   void FolderNodes(
       framework::Node *node,
       std::vector<std::shared_ptr<framework::Node>> *removed_nodes) {
-    vector<std::shared_ptr<framework::OpDesc>> origin_descs =
-        node->OpDescs(node_.Depth());
     node->Folder(node_.Depth(), Type(),
                  {{G_OP_TYPE_ELEMENTWISE_ADD, {"Y", "Z"}}}, removed_nodes);
   }
@@ -69,7 +67,14 @@ class FushionFcOp : public framework::OperatorWithKernel<DeviceType> {
   FushionFcParam param_;
 };
 
-// static framework::FusionOpRegistrar fc_registrar(new FusionFcMatcher());
+#ifdef PADDLE_MOBILE_CPU
+static framework::FusionOpRegistrar fc_registrar(new FusionFcMatcher());
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+static framework::FusionOpRegistrar fc_registrar(new FusionFcMatcher());
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 }  // namespace operators
 }  // namespace paddle_mobile

src/operators/kernel/fpga/conv_kernel.cpp

@@ -14,15 +14,16 @@ limitations under the License. */
 
 #ifdef CONV_OP
 
+#include "operators/kernel/conv_kernel.h"
+
 namespace paddle_mobile {
 namespace operators {
 
-// template<>
-// void ConvKernel<FPGA, float>::Compute(const ConvParam &param) const
-// {}
-//
-// template class ConvKernel<FPGA, float>;
-}
+template <>
+void ConvKernel<FPGA, float>::Compute(const ConvParam &param) const {}
+template class ConvKernel<FPGA, float>;
+
+}  // namespace operators
 }  // namespace paddle_mobile
 
 #endif

src/operators/lrn_op.cpp

@@ -29,7 +29,13 @@ template class LrnOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(lrn);
-REGISTER_OPERATOR(lrn, ops::LrnOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(lrn);
+REGISTER_OPERATOR_CPU(lrn, ops::LrnOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/mul_op.cpp

@@ -55,7 +55,13 @@ template class MulOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(mul);
-REGISTER_OPERATOR(mul, ops::MulOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(mul);
+REGISTER_OPERATOR_CPU(mul, ops::MulOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/multiclass_nms_op.cpp

@@ -39,7 +39,13 @@ template class MultiClassNMSOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(multiclass_nms);
-REGISTER_OPERATOR(multiclass_nms, ops::MultiClassNMSOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(multiclass_nms);
+REGISTER_OPERATOR_CPU(multiclass_nms, ops::MultiClassNMSOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/pool_op.cpp

@@ -59,7 +59,13 @@ template class PoolOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(pool2d);
-REGISTER_OPERATOR(pool2d, ops::PoolOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(pool2d);
+REGISTER_OPERATOR_CPU(pool2d, ops::PoolOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/prior_box_op.cpp

@@ -49,7 +49,13 @@ template class PriorBoxOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(prior_box);
-REGISTER_OPERATOR(prior_box, ops::PriorBoxOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(prior_box);
+REGISTER_OPERATOR_CPU(prior_box, ops::PriorBoxOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/relu_op.cpp

@@ -33,7 +33,13 @@ template class ReluOp<CPU, float>;
  * 都是需要和model中类型对应起来的
  * */
 namespace ops = paddle_mobile::operators;
-USE_OP(relu);
-REGISTER_OPERATOR(relu, ops::ReluOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(relu);
+REGISTER_OPERATOR_CPU(relu, ops::ReluOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/reshape_op.cpp

@@ -32,7 +32,13 @@ template class ReshapeOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(reshape);
-REGISTER_OPERATOR(reshape, ops::ReshapeOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(reshape);
+REGISTER_OPERATOR_CPU(reshape, ops::ReshapeOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/sigmoid_op.cpp

@@ -27,7 +27,13 @@ template class SigmoidOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(sigmoid);
-REGISTER_OPERATOR(sigmoid, ops::SigmoidOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(sigmoid);
+REGISTER_OPERATOR_CPU(sigmoid, ops::SigmoidOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/softmax_op.cpp

@@ -27,7 +27,13 @@ template class SoftmaxOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(softmax);
-REGISTER_OPERATOR(softmax, ops::SoftmaxOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(softmax);
+REGISTER_OPERATOR_CPU(softmax, ops::SoftmaxOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

src/operators/transpose_op.cpp

@@ -52,7 +52,13 @@ template class TransposeOp<CPU, float>;
 }  // namespace paddle_mobile
 
 namespace ops = paddle_mobile::operators;
-USE_OP(transpose);
-REGISTER_OPERATOR(transpose, ops::TransposeOp);
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(transpose);
+REGISTER_OPERATOR_CPU(transpose, ops::TransposeOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
 
 #endif

tools/build.sh

@@ -98,7 +98,7 @@ build_for_ios() {
     BUILD_DIR=../build/release/"${PLATFORM}"
     TOOLCHAIN_FILE="./tools/ios-cmake/ios.toolchain.cmake"
     C_FLAGS="-fobjc-abi-version=2 -fobjc-arc -isysroot ${CMAKE_OSX_SYSROOT}"
-    CXX_FLAGS="-fobjc-abi-version=2 -fobjc-arc -std=gnu++11 -stdlib=libc++ -isysroot ${CMAKE_OSX_SYSROOT}"
+    CXX_FLAGS="-fobjc-abi-version=2 -fobjc-arc -std=gnu++14 -stdlib=libc++ -isysroot ${CMAKE_OSX_SYSROOT}"
     mkdir -p "${BUILD_DIR}"
     if [ $# -eq 1 ]; then
         NET=$1

tools/ios-cmake/ios.toolchain.cmake

-# This file is part of the ios-cmake project. It was retrieved from
-# https://github.com/cristeab/ios-cmake.git, which is a fork of
-# https://code.google.com/p/ios-cmake/. Which in turn is based off of
-# the Platform/Darwin.cmake and Platform/UnixPaths.cmake files which
-# are included with CMake 2.8.4
-#
-# The ios-cmake project is licensed under the new BSD license.
-#
-# Copyright (c) 2014, Bogdan Cristea and LTE Engineering Software,
-# Kitware, Inc., Insight Software Consortium.  All rights reserved.
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#
-# 2. Redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution.
-#
-# 3. Neither the name of the copyright holder nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-# POSSIBILITY OF SUCH DAMAGE.
-#
-# This file is based off of the Platform/Darwin.cmake and
-# Platform/UnixPaths.cmake files which are included with CMake 2.8.4
-# It has been altered for iOS development.
-#
-# Updated by Alex Stewart (alexs.mac@gmail.com)
-#
-# *****************************************************************************
-#      Now maintained by Alexander Widerberg (widerbergaren [at] gmail.com)
-#                      under the BSD-Clause-3 licence
-# *****************************************************************************
-#
-#                           INFORMATION / HELP
-#
-# The following variables control the behaviour of this toolchain:
-#
-# IOS_PLATFORM: OS (default) or SIMULATOR or SIMULATOR64 or TVOS or SIMULATOR_TVOS
-#    OS = Build for iPhoneOS.
-#    SIMULATOR = Build for x86 i386 iPhone Simulator.
-#    SIMULATOR64 = Build for x86_64 iPhone Simulator.
-#    TVOS = Build for AppleTVOS.
-#    SIMULATOR_TVOS = Build for x86_64 AppleTV Simulator.
-# CMAKE_OSX_SYSROOT: Path to the iOS SDK to use.  By default this is
-#    automatically determined from IOS_PLATFORM and xcodebuild, but
-#    can also be manually specified (although this should not be required).
-# CMAKE_IOS_DEVELOPER_ROOT: Path to the Developer directory for the iOS platform
-#    being compiled for.  By default this is automatically determined from
-#    CMAKE_OSX_SYSROOT, but can also be manually specified (although this should
-#    not be required).
-# ENABLE_BITCODE: (1|0) Enables or disables bitcode support. Default 1 (true)
-# ENABLE_ARC: (1|0) Enables or disables ARC support. Default 1 (true, ARC enabled by default)
-# IOS_ARCH: (armv7 armv7s arm64 i386 x86_64) If specified, will override the default architectures for the given IOS_PLATFORM
-#    OS = armv7 armv7s arm64
-#    SIMULATOR = i386
-#    SIMULATOR64 = x86_64
-#    TVOS = arm64
-#    SIMULATOR_TVOS = x86_64
+# This file is based off of the Platform/Darwin.cmake and Platform/UnixPaths.cmake
+# files which are included with CMake 2.8.4
+# It has been altered for iOS development
+
+# Options:
 #
-# This toolchain defines the following variables for use externally:
+# IOS_PLATFORM = OS (default) or SIMULATOR or SIMULATOR64
+#   This decides if SDKS will be selected from the iPhoneOS.platform or iPhoneSimulator.platform folders
+#   OS - the default, used to build for iPhone and iPad physical devices, which have an arm arch.
+#   SIMULATOR - used to build for the Simulator platforms, which have an x86 arch.
 #
-# XCODE_VERSION: Version number (not including Build version) of Xcode detected.
-# IOS_SDK_VERSION: Version of iOS SDK being used.
-# CMAKE_OSX_ARCHITECTURES: Architectures being compiled for (generated from
-#    IOS_PLATFORM).
+# CMAKE_IOS_DEVELOPER_ROOT = automatic(default) or /path/to/platform/Developer folder
+#   By default this location is automatcially chosen based on the IOS_PLATFORM value above.
+#   If set manually, it will override the default location and force the user of a particular Developer Platform
 #
-# This toolchain defines the following macros for use externally:
+# CMAKE_IOS_SDK_ROOT = automatic(default) or /path/to/platform/Developer/SDKs/SDK folder
+#   By default this location is automatcially chosen based on the CMAKE_IOS_DEVELOPER_ROOT value.
+#   In this case it will always be the most up-to-date SDK found in the CMAKE_IOS_DEVELOPER_ROOT path.
+#   If set manually, this will force the use of a specific SDK version
+
+# Macros:
 #
-# set_xcode_property (TARGET XCODE_PROPERTY XCODE_VALUE XCODE_VARIANT)
-#   A convenience macro for setting xcode specific properties on targets.
-#   Available variants are: All, Release, RelWithDebInfo, Debug, MinSizeRel
-#   example: set_xcode_property (myioslib IPHONEOS_DEPLOYMENT_TARGET "3.1" "all").
+# set_xcode_property (TARGET XCODE_PROPERTY XCODE_VALUE)
+#  A convenience macro for setting xcode specific properties on targets
+#  example: set_xcode_property (myioslib IPHONEOS_DEPLOYMENT_TARGET "3.1")
 #
 # find_host_package (PROGRAM ARGS)
-#   A macro used to find executable programs on the host system, not within the
-#   iOS environment.  Thanks to the android-cmake project for providing the
-#   command.
-
-# Fix for PThread library not in path
-set(CMAKE_THREAD_LIBS_INIT "-lpthread")
-set(CMAKE_HAVE_THREADS_LIBRARY 1)
-set(CMAKE_USE_WIN32_THREADS_INIT 0)
-set(CMAKE_USE_PTHREADS_INIT 1)
-
-# Get the Xcode version being used.
-execute_process(COMMAND xcodebuild -version
-  OUTPUT_VARIABLE XCODE_VERSION
-  ERROR_QUIET
-  OUTPUT_STRIP_TRAILING_WHITESPACE)
-string(REGEX MATCH "Xcode [0-9\\.]+" XCODE_VERSION "${XCODE_VERSION}")
-string(REGEX REPLACE "Xcode ([0-9\\.]+)" "\\1" XCODE_VERSION "${XCODE_VERSION}")
-message(STATUS "Building with Xcode version: ${XCODE_VERSION}")
-# Default to building for iPhoneOS if not specified otherwise, and we cannot
-# determine the platform from the CMAKE_OSX_ARCHITECTURES variable.  The use
-# of CMAKE_OSX_ARCHITECTURES is such that try_compile() projects can correctly
-# determine the value of IOS_PLATFORM from the root project, as
-# CMAKE_OSX_ARCHITECTURES is propagated to them by CMake.
-if (NOT DEFINED IOS_PLATFORM)
-  if (CMAKE_OSX_ARCHITECTURES)
-    if (CMAKE_OSX_ARCHITECTURES MATCHES ".*arm.*")
-      set(IOS_PLATFORM "OS")
-    elseif (CMAKE_OSX_ARCHITECTURES MATCHES "i386")
-      set(IOS_PLATFORM "SIMULATOR")
-    elseif (CMAKE_OSX_ARCHITECTURES MATCHES "x86_64")
-      set(IOS_PLATFORM "SIMULATOR64")
-    endif()
-  endif()
-  if (NOT IOS_PLATFORM)
-    set(IOS_PLATFORM "OS")
-  endif()
-endif()
-set(IOS_PLATFORM ${IOS_PLATFORM} CACHE STRING
-  "Type of iOS platform for which to build.")
-# Determine the platform name and architectures for use in xcodebuild commands
-# from the specified IOS_PLATFORM name.
-if (IOS_PLATFORM STREQUAL "OS")
-  set(XCODE_IOS_PLATFORM iphoneos)
-  if(NOT IOS_ARCH)
-    set(IOS_ARCH armv7 armv7s arm64)
-  endif()
-elseif (IOS_PLATFORM STREQUAL "SIMULATOR")
-  set(XCODE_IOS_PLATFORM iphonesimulator)
-  if(NOT IOS_ARCH)
-    set(IOS_ARCH i386)
-  endif()
-elseif(IOS_PLATFORM STREQUAL "SIMULATOR64")
-  set(XCODE_IOS_PLATFORM iphonesimulator)
-  if(NOT IOS_ARCH)
-    set(IOS_ARCH x86_64)
-  endif()
-elseif (IOS_PLATFORM STREQUAL "TVOS")
-  set(XCODE_IOS_PLATFORM appletvos)
-  if(NOT IOS_ARCH)
-    set(IOS_ARCH arm64)
-  endif()
-elseif (IOS_PLATFORM STREQUAL "SIMULATOR_TVOS")
-  set(XCODE_IOS_PLATFORM appletvsimulator)
-  if(NOT IOS_ARCH)
-    set(IOS_ARCH x86_64)
-  endif()
-else()
-  message(FATAL_ERROR "Invalid IOS_PLATFORM: ${IOS_PLATFORM}")
-endif()
-message(STATUS "Configuring iOS build for platform: ${IOS_PLATFORM}, "
-  "architecture(s): ${IOS_ARCH}")
-# If user did not specify the SDK root to use, then query xcodebuild for it.
-if (NOT CMAKE_OSX_SYSROOT)
-  execute_process(COMMAND xcodebuild -version -sdk ${XCODE_IOS_PLATFORM} Path
-    OUTPUT_VARIABLE CMAKE_OSX_SYSROOT
-    ERROR_QUIET
-    OUTPUT_STRIP_TRAILING_WHITESPACE)
-  message(STATUS "Using SDK: ${CMAKE_OSX_SYSROOT} for platform: ${IOS_PLATFORM}")
-endif()
-if (NOT EXISTS ${CMAKE_OSX_SYSROOT})
-  message(FATAL_ERROR "Invalid CMAKE_OSX_SYSROOT: ${CMAKE_OSX_SYSROOT} "
-    "does not exist.")
-endif()
-# Specify minimum version of deployment target.
-if (NOT DEFINED IOS_DEPLOYMENT_TARGET)
-  # Unless specified, SDK version 8.0 is used by default as minimum target version.
-  set(IOS_DEPLOYMENT_TARGET "8.0"
-      CACHE STRING "Minimum iOS version to build for." )
-  message(STATUS "Using the default min-version since IOS_DEPLOYMENT_TARGET not provided!")
-endif()
-# Use bitcode or not
-if (NOT DEFINED ENABLE_BITCODE)
-  # Unless specified, enable bitcode support by default
-  set(ENABLE_BITCODE TRUE CACHE BOOL "Wheter or not to enable bitcode")
-  message(STATUS "Enabling bitcode support by default. ENABLE_BITCODE not provided!")
-endif()
-# Use ARC or not
-if (NOT DEFINED ENABLE_ARC)
-  # Unless specified, enable ARC support by default
-  set(ENABLE_ARC TRUE CACHE BOOL "Wheter or not to enable ARC")
-  message(STATUS "Enabling ARC support by default. ENABLE_ARC not provided!")
-endif()
-# Get the SDK version information.
-execute_process(COMMAND xcodebuild -sdk ${CMAKE_OSX_SYSROOT} -version SDKVersion
-  OUTPUT_VARIABLE IOS_SDK_VERSION
-  ERROR_QUIET
-  OUTPUT_STRIP_TRAILING_WHITESPACE)
-# Find the Developer root for the specific iOS platform being compiled for
-# from CMAKE_OSX_SYSROOT.  Should be ../../ from SDK specified in
-# CMAKE_OSX_SYSROOT.  There does not appear to be a direct way to obtain
-# this information from xcrun or xcodebuild.
-if (NOT CMAKE_IOS_DEVELOPER_ROOT)
-  get_filename_component(IOS_PLATFORM_SDK_DIR ${CMAKE_OSX_SYSROOT} PATH)
-  get_filename_component(CMAKE_IOS_DEVELOPER_ROOT ${IOS_PLATFORM_SDK_DIR} PATH)
-endif()
-if (NOT EXISTS ${CMAKE_IOS_DEVELOPER_ROOT})
-  message(FATAL_ERROR "Invalid CMAKE_IOS_DEVELOPER_ROOT: "
-    "${CMAKE_IOS_DEVELOPER_ROOT} does not exist.")
-endif()
-# Find the C & C++ compilers for the specified SDK.
-if (NOT CMAKE_C_COMPILER)
-  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT} -find clang
-    OUTPUT_VARIABLE CMAKE_C_COMPILER
-    ERROR_QUIET
-    OUTPUT_STRIP_TRAILING_WHITESPACE)
-  message(STATUS "Using C compiler: ${CMAKE_C_COMPILER}")
-endif()
-if (NOT CMAKE_CXX_COMPILER)
-  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT} -find clang++
-    OUTPUT_VARIABLE CMAKE_CXX_COMPILER
-    ERROR_QUIET
-    OUTPUT_STRIP_TRAILING_WHITESPACE)
-  message(STATUS "Using CXX compiler: ${CMAKE_CXX_COMPILER}")
-endif()
-# Find (Apple's) libtool.
-execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT} -find libtool
-  OUTPUT_VARIABLE IOS_LIBTOOL
-  ERROR_QUIET
-  OUTPUT_STRIP_TRAILING_WHITESPACE)
-message(STATUS "Using libtool: ${IOS_LIBTOOL}")
-# Configure libtool to be used instead of ar + ranlib to build static libraries.
-# This is required on Xcode 7+, but should also work on previous versions of
-# Xcode.
-set(CMAKE_C_CREATE_STATIC_LIBRARY
-  "${IOS_LIBTOOL} -static -o <TARGET> <LINK_FLAGS> <OBJECTS> ")
-set(CMAKE_CXX_CREATE_STATIC_LIBRARY
-  "${IOS_LIBTOOL} -static -o <TARGET> <LINK_FLAGS> <OBJECTS> ")
-# Get the version of Darwin (OS X) of the host.
-execute_process(COMMAND uname -r
-  OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION
-  ERROR_QUIET
-  OUTPUT_STRIP_TRAILING_WHITESPACE)
-# Standard settings.
-set(CMAKE_SYSTEM_NAME Darwin CACHE INTERNAL "")
-set(CMAKE_SYSTEM_VERSION ${IOS_SDK_VERSION} CACHE INTERNAL "")
-set(UNIX TRUE CACHE BOOL "")
-set(APPLE TRUE CACHE BOOL "")
-set(IOS TRUE CACHE BOOL "")
+#  A macro used to find executable programs on the host system, not within the iOS environment.
+#  Thanks to the android-cmake project for providing the command
+
+# Standard settings
+set (CMAKE_SYSTEM_NAME Darwin)
+set (CMAKE_SYSTEM_VERSION 1)
+set (UNIX True)
+set (APPLE True)
+set (IOS True)
+
+# Required as of cmake 2.8.10
+set (CMAKE_OSX_DEPLOYMENT_TARGET "" CACHE STRING "Force unset of the deployment target for iOS" FORCE)
+
+# Determine the cmake host system version so we know where to find the iOS SDKs
+find_program (CMAKE_UNAME uname /bin /usr/bin /usr/local/bin)
+if (CMAKE_UNAME)
+  exec_program(uname ARGS -r OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION)
+  string (REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\1" DARWIN_MAJOR_VERSION "${CMAKE_HOST_SYSTEM_VERSION}")
+endif (CMAKE_UNAME)
+
+# Force the compilers to gcc for iOS
+#include (CMakeForceCompiler)
+#CMAKE_C_COMPILER (/usr/bin/gcc)
+#CMAKE_CXX_COMPILER (/usr/bin/g++)
+set(CMAKE_C_COMPILER /usr/bin/gcc)
+set(CMAKE_CXX_COMPILER /usr/bin/g++)
 set(CMAKE_AR ar CACHE FILEPATH "" FORCE)
-set(CMAKE_RANLIB ranlib CACHE FILEPATH "" FORCE)
-# Force unset of OS X-specific deployment target (otherwise autopopulated),
-# required as of cmake 2.8.10.
-set(CMAKE_OSX_DEPLOYMENT_TARGET "" CACHE STRING
-  "Must be empty for iOS builds." FORCE)
-# Set the architectures for which to build.
-set(CMAKE_OSX_ARCHITECTURES ${IOS_ARCH} CACHE STRING "Build architecture for iOS")
-# Skip the platform compiler checks for cross compiling.
-set(CMAKE_CXX_COMPILER_FORCED TRUE)
-set(CMAKE_CXX_COMPILER_WORKS TRUE)
-set(CMAKE_C_COMPILER_FORCED TRUE)
-set(CMAKE_C_COMPILER_WORKS TRUE)
-# All iOS/Darwin specific settings - some may be redundant.
-set(CMAKE_SHARED_LIBRARY_PREFIX "lib")
-set(CMAKE_SHARED_LIBRARY_SUFFIX ".dylib")
-set(CMAKE_SHARED_MODULE_PREFIX "lib")
-set(CMAKE_SHARED_MODULE_SUFFIX ".so")
-set(CMAKE_MODULE_EXISTS 1)
-set(CMAKE_DL_LIBS "")
-set(CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ")
-set(CMAKE_C_OSX_CURRENT_VERSION_FLAG "-current_version ")
-set(CMAKE_CXX_OSX_COMPATIBILITY_VERSION_FLAG "${CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG}")
-set(CMAKE_CXX_OSX_CURRENT_VERSION_FLAG "${CMAKE_C_OSX_CURRENT_VERSION_FLAG}")
-message(STATUS "Building for minimum iOS version: ${IOS_DEPLOYMENT_TARGET}"
-               " (SDK version: ${IOS_SDK_VERSION})")
-# Note that only Xcode 7+ supports the newer more specific:
-# -m${XCODE_IOS_PLATFORM}-version-min flags, older versions of Xcode use:
-# -m(ios/ios-simulator)-version-min instead.
-if (IOS_PLATFORM STREQUAL "OS")
-  if (XCODE_VERSION VERSION_LESS 7.0)
-    set(XCODE_IOS_PLATFORM_VERSION_FLAGS
-      "-mios-version-min=${IOS_DEPLOYMENT_TARGET}")
-  else()
-    # Xcode 7.0+ uses flags we can build directly from XCODE_IOS_PLATFORM.
-    set(XCODE_IOS_PLATFORM_VERSION_FLAGS
-      "-m${XCODE_IOS_PLATFORM}-version-min=${IOS_DEPLOYMENT_TARGET}")
-  endif()
-elseif (IOS_PLATFORM STREQUAL "TVOS")
-  set(XCODE_IOS_PLATFORM_VERSION_FLAGS
-    "-mtvos-version-min=${IOS_DEPLOYMENT_TARGET}")
-elseif (IOS_PLATFORM STREQUAL "SIMULATOR_TVOS")
-  set(XCODE_IOS_PLATFORM_VERSION_FLAGS
-    "-mtvos-simulator-version-min=${IOS_DEPLOYMENT_TARGET}")
-else()
-  # SIMULATOR or SIMULATOR64 both use -mios-simulator-version-min.
-  set(XCODE_IOS_PLATFORM_VERSION_FLAGS
-    "-mios-simulator-version-min=${IOS_DEPLOYMENT_TARGET}")
-endif()
-message(STATUS "Version flags set to: ${XCODE_IOS_PLATFORM_VERSION_FLAGS}")
-
-if (ENABLE_BITCODE)
-  set(BITCODE "-fembed-bitcode")
-  message(STATUS "Enabling bitcode support.")
-else()
-  set(BITCODE "")
-  message(STATUS "Disabling bitcode support.")
-endif()
-
-if (ENABLE_ARC)
-  set(FOBJC_ARC "-fobjc-arc")
-  message(STATUS "Enabling ARC support.")
-else()
-  set(FOBJC_ARC "-fno-objc-arc")
-  message(STATUS "Disabling ARC support.")
-endif()
-
-set(CMAKE_C_FLAGS
-"${XCODE_IOS_PLATFORM_VERSION_FLAGS} ${BITCODE} -fobjc-abi-version=2 ${FOBJC_ARC} ${C_FLAGS}")
-# Hidden visibilty is required for C++ on iOS.
-set(CMAKE_CXX_FLAGS
-"${XCODE_IOS_PLATFORM_VERSION_FLAGS} ${BITCODE} -fvisibility=hidden -fvisibility-inlines-hidden -fobjc-abi-version=2 ${FOBJC_ARC} ${CXX_FLAGS}")
-set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS} -DNDEBUG -Os -fomit-frame-pointer -ffast-math ${BITCODE} ${CXX_FLAGS_MINSIZEREL}")
-set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS} -DNDEBUG -O2 -g -fomit-frame-pointer -ffast-math ${BITCODE} ${CXX_FLAGS_RELWITHDEBINFO}")
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS} -DNDEBUG -O3 -fomit-frame-pointer -ffast-math ${BITCODE} ${CXX_FLAGS_RELEASE}")
-set(CMAKE_C_LINK_FLAGS "${XCODE_IOS_PLATFORM_VERSION_FLAGS} -Wl,-search_paths_first ${C_LINK_FLAGS}")
-set(CMAKE_CXX_LINK_FLAGS "${XCODE_IOS_PLATFORM_VERSION_FLAGS}  -Wl,-search_paths_first ${CXX_LINK_FLAGS}")
-
-# In order to ensure that the updated compiler flags are used in try_compile()
-# tests, we have to forcibly set them in the CMake cache, not merely set them
-# in the local scope.
-list(APPEND VARS_TO_FORCE_IN_CACHE
-  CMAKE_C_FLAGS
-  CMAKE_CXX_FLAGS
-  CMAKE_CXX_FLAGS_RELWITHDEBINFO
-  CMAKE_CXX_FLAGS_MINSIZEREL
-  CMAKE_CXX_FLAGS_RELEASE
-  CMAKE_C_LINK_FLAGS
-  CMAKE_CXX_LINK_FLAGS)
-foreach(VAR_TO_FORCE ${VARS_TO_FORCE_IN_CACHE})
-  set(${VAR_TO_FORCE} "${${VAR_TO_FORCE}}" CACHE STRING "" FORCE)
-endforeach()
-
-set(CMAKE_PLATFORM_HAS_INSTALLNAME 1)
-set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib -headerpad_max_install_names")
-set(CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle -headerpad_max_install_names")
-set(CMAKE_SHARED_MODULE_LOADER_C_FLAG "-Wl,-bundle_loader,")
-set(CMAKE_SHARED_MODULE_LOADER_CXX_FLAG "-Wl,-bundle_loader,")
-set(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib" ".so" ".a")
-# Hack: if a new cmake (which uses CMAKE_INSTALL_NAME_TOOL) runs on an old
-# build tree (where install_name_tool was hardcoded) and where
-# CMAKE_INSTALL_NAME_TOOL isn't in the cache and still cmake didn't fail in
-# CMakeFindBinUtils.cmake (because it isn't rerun) hardcode
-# CMAKE_INSTALL_NAME_TOOL here to install_name_tool, so it behaves as it did
-# before, Alex.
+
+# Skip the platform compiler checks for cross compiling
+set (CMAKE_CXX_COMPILER_WORKS TRUE)
+set (CMAKE_C_COMPILER_WORKS TRUE)
+
+# All iOS/Darwin specific settings - some may be redundant
+set (CMAKE_SHARED_LIBRARY_PREFIX "lib")
+set (CMAKE_SHARED_LIBRARY_SUFFIX ".dylib")
+set (CMAKE_SHARED_MODULE_PREFIX "lib")
+set (CMAKE_SHARED_MODULE_SUFFIX ".so")
+set (CMAKE_MODULE_EXISTS 1)
+set (CMAKE_DL_LIBS "")
+
+set (CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ")
+set (CMAKE_C_OSX_CURRENT_VERSION_FLAG "-current_version ")
+set (CMAKE_CXX_OSX_COMPATIBILITY_VERSION_FLAG "${CMAKE_C_OSX_COMPATIBILITY_VERSION_FLAG}")
+set (CMAKE_CXX_OSX_CURRENT_VERSION_FLAG "${CMAKE_C_OSX_CURRENT_VERSION_FLAG}")
+
+# Hidden visibilty is required for cxx on iOS
+set (CMAKE_C_FLAGS_INIT "")
+set (CMAKE_CXX_FLAGS_INIT "-fvisibility=hidden -fvisibility-inlines-hidden")
+
+set (CMAKE_C_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_C_LINK_FLAGS}")
+set (CMAKE_CXX_LINK_FLAGS "-Wl,-search_paths_first ${CMAKE_CXX_LINK_FLAGS}")
+
+set (CMAKE_PLATFORM_HAS_INSTALLNAME 1)
+set (CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib -headerpad_max_install_names")
+set (CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle -headerpad_max_install_names")
+set (CMAKE_SHARED_MODULE_LOADER_C_FLAG "-Wl,-bundle_loader,")
+set (CMAKE_SHARED_MODULE_LOADER_CXX_FLAG "-Wl,-bundle_loader,")
+set (CMAKE_FIND_LIBRARY_SUFFIXES ".dylib" ".so" ".a")
+
+# hack: if a new cmake (which uses CMAKE_INSTALL_NAME_TOOL) runs on an old build tree
+# (where install_name_tool was hardcoded) and where CMAKE_INSTALL_NAME_TOOL isn't in the cache
+# and still cmake didn't fail in CMakeFindBinUtils.cmake (because it isn't rerun)
+# hardcode CMAKE_INSTALL_NAME_TOOL here to install_name_tool, so it behaves as it did before, Alex
 if (NOT DEFINED CMAKE_INSTALL_NAME_TOOL)
   find_program(CMAKE_INSTALL_NAME_TOOL install_name_tool)
 endif (NOT DEFINED CMAKE_INSTALL_NAME_TOOL)
-# Set the find root to the iOS developer roots and to user defined paths.
-set(CMAKE_FIND_ROOT_PATH ${CMAKE_IOS_DEVELOPER_ROOT} ${CMAKE_OSX_SYSROOT}
-  ${CMAKE_PREFIX_PATH} CACHE string  "iOS find search path root" FORCE)
-# Default to searching for frameworks first.
-set(CMAKE_FIND_FRAMEWORK FIRST)
-# Set up the default search directories for frameworks.
-set(CMAKE_SYSTEM_FRAMEWORK_PATH
-  ${CMAKE_OSX_SYSROOT}/System/Library/Frameworks
-  ${CMAKE_OSX_SYSROOT}/System/Library/PrivateFrameworks
-  ${CMAKE_OSX_SYSROOT}/Developer/Library/Frameworks)
-# Only search the specified iOS SDK, not the remainder of the host filesystem.
-set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-# This little macro lets you set any XCode specific property.
-macro(set_xcode_property TARGET XCODE_PROPERTY XCODE_VALUE XCODE_RELVERSION)
-  set(XCODE_RELVERSION_I "${XCODE_RELVERSION}")
-  if (XCODE_RELVERSION_I STREQUAL "All")
-    set_property(TARGET ${TARGET} PROPERTY
-    XCODE_ATTRIBUTE_${XCODE_PROPERTY} "${XCODE_VALUE}")
-  else()
-    set_property(TARGET ${TARGET} PROPERTY
-    XCODE_ATTRIBUTE_${XCODE_PROPERTY}[variant=${XCODE_RELVERSION_I}] "${XCODE_VALUE}")
-  endif()
-endmacro(set_xcode_property)
-# This macro lets you find executable programs on the host system.
-macro(find_host_package)
-  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
-  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER)
-  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER)
-  set(IOS FALSE)
+
+# Setup iOS platform unless specified manually with IOS_PLATFORM
+if (NOT DEFINED IOS_PLATFORM)
+  set (IOS_PLATFORM "OS")
+endif (NOT DEFINED IOS_PLATFORM)
+set (IOS_PLATFORM ${IOS_PLATFORM} CACHE STRING "Type of iOS Platform")
+
+# Setup building for arm64 or not
+if (NOT DEFINED BUILD_ARM64)
+  set (BUILD_ARM64 true)
+endif (NOT DEFINED BUILD_ARM64)
+set (BUILD_ARM64 ${BUILD_ARM64} CACHE STRING "Build arm64 arch or not")
+
+# Check the platform selection and setup for developer root
+if (${IOS_PLATFORM} STREQUAL "OS")
+  set (IOS_PLATFORM_LOCATION "iPhoneOS.platform")
+
+  # This causes the installers to properly locate the output libraries
+  set (CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphoneos")
+elseif (${IOS_PLATFORM} STREQUAL "SIMULATOR")
+  set (SIMULATOR true)
+  set (IOS_PLATFORM_LOCATION "iPhoneSimulator.platform")
+
+  # This causes the installers to properly locate the output libraries
+  set (CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphonesimulator")
+elseif (${IOS_PLATFORM} STREQUAL "SIMULATOR64")
+  set (SIMULATOR true)
+  set (IOS_PLATFORM_LOCATION "iPhoneSimulator.platform")
+
+  # This causes the installers to properly locate the output libraries
+  set (CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphonesimulator")
+else (${IOS_PLATFORM} STREQUAL "OS")
+  message (FATAL_ERROR "Unsupported IOS_PLATFORM value selected. Please choose OS or SIMULATOR")
+endif (${IOS_PLATFORM} STREQUAL "OS")
+
+# Setup iOS developer location unless specified manually with CMAKE_IOS_DEVELOPER_ROOT
+# Note Xcode 4.3 changed the installation location, choose the most recent one available
+exec_program(/usr/bin/xcode-select ARGS -print-path OUTPUT_VARIABLE CMAKE_XCODE_DEVELOPER_DIR)
+set (XCODE_POST_43_ROOT "${CMAKE_XCODE_DEVELOPER_DIR}/Platforms/${IOS_PLATFORM_LOCATION}/Developer")
+set (XCODE_PRE_43_ROOT "/Developer/Platforms/${IOS_PLATFORM_LOCATION}/Developer")
+if (NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT)
+  if (EXISTS ${XCODE_POST_43_ROOT})
+    set (CMAKE_IOS_DEVELOPER_ROOT ${XCODE_POST_43_ROOT})
+  elseif(EXISTS ${XCODE_PRE_43_ROOT})
+    set (CMAKE_IOS_DEVELOPER_ROOT ${XCODE_PRE_43_ROOT})
+  endif (EXISTS ${XCODE_POST_43_ROOT})
+endif (NOT DEFINED CMAKE_IOS_DEVELOPER_ROOT)
+set (CMAKE_IOS_DEVELOPER_ROOT ${CMAKE_IOS_DEVELOPER_ROOT} CACHE PATH "Location of iOS Platform")
+
+# Find and use the most recent iOS sdk unless specified manually with CMAKE_IOS_SDK_ROOT
+if (NOT DEFINED CMAKE_IOS_SDK_ROOT)
+  file (GLOB _CMAKE_IOS_SDKS "${CMAKE_IOS_DEVELOPER_ROOT}/SDKs/*")
+  if (_CMAKE_IOS_SDKS)
+    list (SORT _CMAKE_IOS_SDKS)
+    list (REVERSE _CMAKE_IOS_SDKS)
+    list (GET _CMAKE_IOS_SDKS 0 CMAKE_IOS_SDK_ROOT)
+  else (_CMAKE_IOS_SDKS)
+    message (FATAL_ERROR "No iOS SDK's found in default search path ${CMAKE_IOS_DEVELOPER_ROOT}. Manually set CMAKE_IOS_SDK_ROOT or install the iOS SDK.")
+  endif (_CMAKE_IOS_SDKS)
+  message (STATUS "Toolchain using default iOS SDK: ${CMAKE_IOS_SDK_ROOT}")
+endif (NOT DEFINED CMAKE_IOS_SDK_ROOT)
+set (CMAKE_IOS_SDK_ROOT ${CMAKE_IOS_SDK_ROOT} CACHE PATH "Location of the selected iOS SDK")
+
+# Set the sysroot default to the most recent SDK
+set (CMAKE_OSX_SYSROOT ${CMAKE_IOS_SDK_ROOT} CACHE PATH "Sysroot used for iOS support")
+
+# set the architecture for iOS
+if (${IOS_PLATFORM} STREQUAL "OS")
+  set (IOS_ARCH armv7 armv7s arm64)
+elseif (${IOS_PLATFORM} STREQUAL "SIMULATOR")
+  set (IOS_ARCH i386)
+elseif (${IOS_PLATFORM} STREQUAL "SIMULATOR64")
+  set (IOS_ARCH x86_64)
+endif (${IOS_PLATFORM} STREQUAL "OS")
+
+set (CMAKE_OSX_ARCHITECTURES ${IOS_ARCH} CACHE string  "Build architecture for iOS")
+
+# Set the find root to the iOS developer roots and to user defined paths
+set (CMAKE_FIND_ROOT_PATH ${CMAKE_IOS_DEVELOPER_ROOT} ${CMAKE_IOS_SDK_ROOT} ${CMAKE_PREFIX_PATH} CACHE string  "iOS find search path root")
+
+# default to searching for frameworks first
+set (CMAKE_FIND_FRAMEWORK FIRST)
+
+# set up the default search directories for frameworks
+set (CMAKE_SYSTEM_FRAMEWORK_PATH
+        ${CMAKE_IOS_SDK_ROOT}/System/Library/Frameworks
+        ${CMAKE_IOS_SDK_ROOT}/System/Library/PrivateFrameworks
+        ${CMAKE_IOS_SDK_ROOT}/Developer/Library/Frameworks
+        )
+
+# only search the iOS sdks, not the remainder of the host filesystem
+set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
+set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+
+
+# This little macro lets you set any XCode specific property
+macro (set_xcode_property TARGET XCODE_PROPERTY XCODE_VALUE)
+  set_property (TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY} ${XCODE_VALUE})
+endmacro (set_xcode_property)
+
+
+# This macro lets you find executable programs on the host system
+macro (find_host_package)
+  set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER)
+  set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER)
+  set (IOS FALSE)
+
   find_package(${ARGN})
-  set(IOS TRUE)
-  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
-  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
-endmacro(find_host_package)
+
+  set (IOS TRUE)
+  set (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY)
+  set (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endmacro (find_host_package)
+