Linux cross-compile error, can't find .proto file, but it exists.

[RavenGluttonous]

Dear Developer,

I'm encountering issues while cross-compiling for v7a, and I'd appreciate your assistance in identifying the root cause.

Compiler Version: 11.4.0
System: Linux

CMake Commands:

# For ARMv7-A
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)

set(CMAKE_C_COMPILER  /usr/bin/arm-linux-gnueabihf-gcc)
set(CMAKE_CXX_COMPILER /usr/bin/arm-linux-gnueabihf-g++)
set(DCMAKE_CXX_STANDARD 14)

Terminal Error Messages:

[ 54%] Running cpp protocol buffer compiler on /home/xy/Desktop/protobuf/protobuf/src/google/protobuf/util/message_differencer_unittest_proto3.proto
gmake[2]: protobuf::protoc: No such file or directory
gmake[2]: *** [CMakeFiles/libtest_common.dir/build.make:435：google/protobuf/util/message_differencer_unittest_proto3.pb.h] Error 127
gmake[1]: *** [CMakeFiles/Makefile2:1602：CMakeFiles/libtest_common.dir/all] Error 2
gmake: *** [Makefile:146：all] Error 2

CMakeError.log Contents:

Performing C++ SOURCE FILE Test ABSL_INTERNAL_AT_LEAST_CXX20 failed with the following output:
Change Dir: /home/xy/Desktop/protobuf/protobuf/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_d8636/fast && /usr/bin/gmake -f CMakeFiles/cmTC_d8636.dir/build.make CMakeFiles/cmTC_d8636.dir/build
gmake[1]: Entering directory "/home/xy/Desktop/protobuf/protobuf/CMakeFiles/CMakeTmp"
Building CXX object CMakeFiles/cmTC_d8636.dir/src.cxx.o
/usr/bin/arm-linux-gnueabihf-g++ -DABSL_INTERNAL_AT_LEAST_CXX20  -o CMakeFiles/cmTC_d8636.dir/src.cxx.o -c /home/xy/Desktop/protobuf/protobuf/CMakeFiles/CMakeTmp/src.cxx
/home/xy/Desktop/protobuf/protobuf/CMakeFiles/CMakeTmp/src.cxx:6:4: error: #error "The compiler defaults or is configured for C++ < 20"
  6 | # error "The compiler defaults or is configured for C++ < 20"
   |  ^~~~~
gmake[1]: *** [CMakeFiles/cmTC_d8636.dir/build.make:78：CMakeFiles/cmTC_d8636.dir/src.cxx.o] Error 1
gmake[1]: Leaving directory "/home/xy/Desktop/protobuf/protobuf/CMakeFiles/CMakeTmp"
gmake: *** [Makefile:127：cmTC_d8636/fast] Error 2
Source File:

#ifdef _MSC_VER
# if _MSVC_LANG < 202002L
#  error "The compiler defaults or is configured for C++ < 20"
# endif
#elif __cplusplus < 202002L
# error "The compiler defaults or is configured for C++ < 20"
#endif
int main() { return 0; }