From cee7c0baa5b72e8d0ec2d9a5414d9c41324171cd Mon Sep 17 00:00:00 2001
From: SachinVin <sachinvinayak2000@gmail.com>
Date: Fri, 19 Oct 2018 13:47:24 +0530
Subject: [PATCH] Externals: Find and build cpu-features for cryptopp on
 android

---
 CMakeModules/AndroidNdkModules.cmake | 58 ++++++++++++++++++++++++++++
 externals/cryptopp/CMakeLists.txt    |  6 +++
 2 files changed, 64 insertions(+)
 create mode 100644 CMakeModules/AndroidNdkModules.cmake

diff --git a/CMakeModules/AndroidNdkModules.cmake b/CMakeModules/AndroidNdkModules.cmake
new file mode 100644
index 000000000..64f37fdee
--- /dev/null
+++ b/CMakeModules/AndroidNdkModules.cmake
@@ -0,0 +1,58 @@
+# Copyright (c) 2014, Pavel Rojtberg
+# 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.
+
+macro(android_ndk_import_module_cpufeatures)
+    if(ANDROID)
+        include_directories(${ANDROID_NDK}/sources/android/cpufeatures)
+        add_library(cpufeatures ${ANDROID_NDK}/sources/android/cpufeatures/cpu-features.c)
+        target_link_libraries(cpufeatures dl)
+    endif()
+endmacro()
+
+macro(android_ndk_import_module_native_app_glue)
+    if(ANDROID)
+        include_directories(${ANDROID_NDK}/sources/android/native_app_glue)
+        add_library(native_app_glue ${ANDROID_NDK}/sources/android/native_app_glue/android_native_app_glue.c)
+        target_link_libraries(native_app_glue log)
+    endif()
+endmacro()
+
+macro(android_ndk_import_module_ndk_helper)
+    if(ANDROID)
+        android_ndk_import_module_cpufeatures()
+        android_ndk_import_module_native_app_glue()
+        
+        include_directories(${ANDROID_NDK}/sources/android/ndk_helper)
+        file(GLOB _NDK_HELPER_SRCS ${ANDROID_NDK}/sources/android/ndk_helper/*.cpp ${ANDROID_NDK}/sources/android/ndk_helper/gl3stub.c)
+        add_library(ndk_helper ${_NDK_HELPER_SRCS})
+        target_link_libraries(ndk_helper log android EGL GLESv2 cpufeatures native_app_glue)
+        
+        unset(_NDK_HELPER_SRCS)
+    endif()
+endmacro()
\ No newline at end of file
diff --git a/externals/cryptopp/CMakeLists.txt b/externals/cryptopp/CMakeLists.txt
index db40f06cb..940b5c6b1 100644
--- a/externals/cryptopp/CMakeLists.txt
+++ b/externals/cryptopp/CMakeLists.txt
@@ -242,3 +242,9 @@ target_include_directories(cryptopp INTERFACE .)
 
 find_package(Threads)
 target_link_libraries(cryptopp PRIVATE ${CMAKE_THREAD_LIBS_INIT})
+
+if(ANDROID)
+    include(AndroidNdkModules)
+    android_ndk_import_module_cpufeatures()
+    target_link_libraries(cryptopp PRIVATE cpufeatures)
+endif()