Add CMake OpenSSL module

Author: Liryna

cmake/modules/FindOpenSSL.cmake

@@ -0,0 +1,31 @@
+#
+# Set hints for FindOpenSSL and then call the real FindOpenSSL module.
+#
+# Our way of placing OpenSSL installation outside of the sysroot does not play well
+# with CMake's find_xxx() stuff, so cheat a little and pre-set certain internal
+# variables of FindOpenSSL.cmake so it will skip its searching steps.
+#
+
+# Find the OpenSSL version
+file( GLOB OPENSSL_ROOTS "${ANDROID_NDK}/sources/openssl/*" )
+list( LENGTH OPENSSL_ROOTS OPENSSL_ROOTS_NR )
+
+if( OPENSSL_ROOTS_NR GREATER 1 )
+	message( FATAL_ERROR "Not implemented: more than one OpenSSL version bundled with NDK" )
+endif()
+
+list( GET OPENSSL_ROOTS 0 OPENSSL_ROOT )
+# Set hard-coded pathes for the real FindOpenSSL.cmake (see above)
+set( OPENSSL_INCLUDE_DIR	"${OPENSSL_ROOT}/include"                       CACHE STRING "Bundled OpenSSL include directory")
+set( OPENSSL_ROOT_DIR		"${OPENSSL_ROOT}/libs/${ANDROID_NDK_ABI_NAME}"	CACHE STRING "Bundled OpenSSL root directory")
+
+unset(OPENSSL_SSL_LIBRARY)
+# Cleanup and chain to real FindOpenSSL.cmake
+unset( OPENSSL_ROOT )
+unset( OPENSSL_ROOTS )
+
+set( ORIG_CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" )
+list( REMOVE_ITEM CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}" )
+find_package( OpenSSL )
+set( CMAKE_MODULE_PATH "${ORIG_CMAKE_MODULE_PATH}" )
+unset( ORIG_CMAKE_MODULE_PATH )