fix up ppc64le cross target

cmake/StaticBuild.cmake

@@ -256,6 +256,9 @@ if(CMAKE_CROSSCOMPILING)
   elseif(ARCH_TRIPLET MATCHES arm-linux)
     # cross compile armhf
     set(openssl_system_env SYSTEM=Linux MACHINE=armv4)
+  elseif(ARCH_TRIPLET MATCHES powerpc64le)
+    # cross compile ppc64le
+    set(openssl_system_env SYSTEM=Linux MACHINE=ppc64le)
   endif()
 elseif(CMAKE_C_FLAGS MATCHES "-march=armv7")
   # Help openssl figure out that we're building from armv7 even if on armv8 hardware:

contrib/cross/ppc64le.toolchain.cmake

@@ -10,3 +10,4 @@ set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
 
 set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}-gcc${TOOLCHAIN_SUFFIX})
 set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}-g++${TOOLCHAIN_SUFFIX})
+set(ARCH_TRIPLET ${TOOLCHAIN_PREFIX})