Is there a way to support cross compile mips target

[mllw]

Describe the bug
I wanted to use overlay-triplets to compile the software needed for openwrt across platforms, but there was an error when I specified it as a mips platform

Environment

• OS: [linux cross build]
• Compiler:
  Host Compiler: gcc version 7.3.1 20180303 (Red Hat 7.3.1-5) (GCC)
  Cross Compiler:
  Target: mipsel-openwrt-linux-musl
  Thread model: posix
  gcc version 8.4.0 (OpenWrt GCC 8.4.0 unknown)

To Reproduce
Steps to reproduce the behavior:
1.
vcpkg --overlay-triplets=/root/workspace/triplets --feature-flags="-manifests" install nng --triplet=mips-linux-openwrt
2. See error
Computing installation plan...
The following packages will be built and installed:
nng[core]:mips-linux-openwrt
Failure to read file for hashing: No such file or directory

Custom triplets
arm-linux.cmake mips-linux-openwrt.cmake

mips-linux-openwrt.cmake file info

set(VCPKG_TARGET_ARCHITECTURE mispel)
set(VCPKG_CRT_LINKAGE dynamic)
set(VCPKG_LIBRARY_LINKAGE static)

set(VCPKG_CMAKE_SYSTEM_NAME Linux)

if(NOT CMAKE_HOST_SYSTEM_PROCESSOR)
execute_process(COMMAND "uname" "-m" OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_PROCESSOR OUTPUT_STRIP_TRAILING_WHITESPACE)
endif()

set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE ../toolchain/openwrt.cmake)

openwrt.cmake info:

if(NOT _VCPKG_LINUX_TOOLCHAIN)
set(_VCPKG_LINUX_TOOLCHAIN 1)
if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux")
set(CMAKE_CROSSCOMPILING ON CACHE BOOL "")
endif()
set(CMAKE_SYSTEM_NAME Linux CACHE STRING "")
if(VCPKG_TARGET_ARCHITECTURE STREQUAL "x64")
set(CMAKE_SYSTEM_PROCESSOR x86_64 CACHE STRING "")
elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "x86")
set(CMAKE_SYSTEM_PROCESSOR x86 CACHE STRING "")
string(APPEND VCPKG_C_FLAGS " -m32")
string(APPEND VCPKG_CXX_FLAGS " -m32")
elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm")
set(CMAKE_SYSTEM_PROCESSOR armv7l CACHE STRING "")
elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64")
set(CMAKE_SYSTEM_PROCESSOR aarch64 CACHE STRING "")
elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "mipsel")
set(CMAKE_SYSTEM_PROCESSOR mipsel CACHE STRING "")
endif()

get_property( _CMAKE_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE )
if(NOT _CMAKE_IN_TRY_COMPILE)
string(APPEND CMAKE_C_FLAGS_INIT " -fPIC ${VCPKG_C_FLAGS} ")
string(APPEND CMAKE_CXX_FLAGS_INIT " -fPIC ${VCPKG_CXX_FLAGS} ")
string(APPEND CMAKE_C_FLAGS_DEBUG_INIT " ${VCPKG_C_FLAGS_DEBUG} ")
string(APPEND CMAKE_CXX_FLAGS_DEBUG_INIT " ${VCPKG_CXX_FLAGS_DEBUG} ")
string(APPEND CMAKE_C_FLAGS_RELEASE_INIT " ${VCPKG_C_FLAGS_RELEASE} ")
string(APPEND CMAKE_CXX_FLAGS_RELEASE_INIT " ${VCPKG_CXX_FLAGS_RELEASE} ")

string(APPEND CMAKE_SHARED_LINKER_FLAGS_INIT " ${VCPKG_LINKER_FLAGS} ")
string(APPEND CMAKE_EXE_LINKER_FLAGS_INIT " ${VCPKG_LINKER_FLAGS} ")
if(VCPKG_CRT_LINKAGE STREQUAL "static")
    string(APPEND CMAKE_SHARED_LINKER_FLAGS_INIT "-static ")
    string(APPEND CMAKE_EXE_LINKER_FLAGS_INIT "-static ")
endif()
string(APPEND CMAKE_SHARED_LINKER_FLAGS_DEBUG_INIT " ${VCPKG_LINKER_FLAGS_DEBUG} ")
string(APPEND CMAKE_EXE_LINKER_FLAGS_DEBUG_INIT " ${VCPKG_LINKER_FLAGS_DEBUG} ")
string(APPEND CMAKE_SHARED_LINKER_FLAGS_RELEASE_INIT " ${VCPKG_LINKER_FLAGS_RELEASE} ")
string(APPEND CMAKE_EXE_LINKER_FLAGS_RELEASE_INIT " ${VCPKG_LINKER_FLAGS_RELEASE} ")

endif()
endif()