benchmark complile error

[rangerToby]

benchmark complile error
device: jetson nano
os: ubuntu18.04
gcc7.4/g++7.4/cmake3.10.2

when i try to compile dabnn and its third part code on jetson nano ubuntu16.04(arm-noAndroid)，
cmake .. is all right
when i come to “cmake --build .” ，i got some errors about benchmark code:

In file included from /home/t/project_win/02_190731_BNN/dabnn/benchmark/benchmark_single_model.cpp:3:0:
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h: In instantiation of ‘benchmark::RegisterBenchmark(const char*, Lambda&&, Args&& ...)::<lambda(benchmark::State&)> [with Lambda = void (&)(benchmark::State&, std::__cxx11::basic_string); Args = {char*&}]’:
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h:1053:48: required from ‘struct benchmark::RegisterBenchmark(const char*, Lambda&&, Args&& ...) [with Lambda = void (&)(benchmark::State&, std::__cxx11::basic_string); Args = {char*&}]::<lambda(class benchmark::State&)>’
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h:1052:38: required from ‘benchmark::internal::Benchmark* benchmark::RegisterBenchmark(const char*, Lambda&&, Args&& ...) [with Lambda = void (&)(benchmark::State&, std::__cxx11::basic_string); Args = {char*&}]’/home/t/project_win/02_190731_BNN/dabnn/benchmark/benchmark_single_model.cpp:22:74: required from here
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h:1053:41: error: variable ‘fn’ has function type
name, [=](benchmark::State& st) { fn(st, args...); });
^~
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h:1053:41: error: variable ‘fn’ has function type
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h: In instantiation of ‘struct benchmark::RegisterBenchmark(const char*, Lambda&&, Args&& ...) [with Lambda = void (&)(benchmark::State&, std::__cxx11::basic_string); Args = {char*&}]::<lambda(class benchmark::State&)>’:
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h:1052:38: required from ‘benchmark::internal::Benchmark* benchmark::RegisterBenchmark(const char*, Lambda&&, Args&& ...) [with Lambda = void (&)(benchmark::State&, std::__cxx11::basic_string); Args = {char*&}]’/home/t/project_win/02_190731_BNN/dabnn/benchmark/benchmark_single_model.cpp:22:74: required from here
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h:1053:41: error: field ‘benchmark::RegisterBenchmark(const char*, Lambda&&, Args&& ...) [with Lambda = void (&)(benchmark::State&, std::__cxx11::basic_string); Args = {char*&}]::<lambda(benchmark::State&)>::’ invalidly declared function type
/home/t/project_win/02_190731_BNN/dabnn/third_party/benchmark/src/../include/benchmark/benchmark.h:1039:22: warning: ‘benchmark::internal::Benchmark* benchmark::RegisterBenchmark(const char*, Lambda&&) [with Lambda = benchmark::RegisterBenchmark(const char*, Lambda&&, Args&& ...) [with Lambda = void (&)(benchmark::State&, std::__cxx11::basic_string); Args = {char*&}]::<lambda(benchmark::State&)>]’, declared using local type ‘benchmark::RegisterBenchmark(const char*, Lambda&&, Args&& ...) [with Lambda = void (&)(benchmark::State&, std::__cxx11::basic_string); Args = {char*&}]::<lambda(benchmark::State&)>’, is used but never defined [-fpermissive]
internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn) {
^~~~~~~~~~~~~~~~~
benchmark/CMakeFiles/benchmark_single_model.dir/build.make:62: recipe for target 'benchmark/CMakeFiles/benchmark_single_model.dir/benchmark_single_model.cpp.o' failed

i tried to add "add_cxx_compiler_flag(-fpermissive)" in benchmark/CMakeLists.txt ， and third_part/benchmark/CMakeLists.txt，but got the same error.
I googled it and got close issue on this link: gabime/spdlog#931

tmp solution :
set CMakeLists.txt
option(BNN_BUILD_BENCHMARK "Build benchmark" OFF)
option(BNN_NET_BENCHMARK "define BNN_BENCHMARK" OFF)
rm old cmake files and compile again, it can be compiled completely.

[danyan0820]

I have the issue too.I solved it by add '&' before 'BM_single_model' in benchmark_single_model.cpp.
benchmark::RegisterBenchmark("single_model", &BM_single_model, argv[1]);