Add work-around for linux/armhf target compiling as 64bit w/ OpenSSL

Author: Doy-lee

external/openssl-cmake/CMakeLists.txt

@@ -162,6 +162,17 @@ if(CMAKE_CROSSCOMPILING)
     endif()
   endif()
 endif()
+
+# NOTE: Running the configure step with OpenSSL on linux/armhf defaults to aarch64 instead of armv4
+# so we must set the cross-host value to force it to do the right thing. We detect that platform
+# here and do so accordingly.
+if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+  string(TOLOWER "${CMAKE_SYSTEM_PROCESSOR}" proc)
+  if(proc MATCHES "^arm" OR proc MATCHES "^armv[4-7]")
+    set(cross_host "linux-armv4")
+  endif()
+endif()
+
 build_external(openssl
   CONFIGURE_COMMAND ${CMAKE_COMMAND} -E env
     CC=${deps_cc}