http_c++ example compile error

[zengkui]

Describe the bug (描述bug)
centos 下完成brpc的编译后，编译echo_c++是正常的，但是编译http_c++的example的时候出现了编译错误，如下：

$make
> Compiling http_client.o
g++ -c -I/usr/include/ -I/usr/local/include/ -I../..//output/include -DBRPC_WITH_GLOG=1 -DGFLAGS_NS=google -D_GLIBCXX_USE_CXX11_ABI=0 -g -std=c++0x -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Wno-unused-parameter -fPIC -fno-omit-frame-pointer -DBRPC_ENABLE_CPU_PROFILER http_client.cpp -o http_client.o
>Linking http_client
g++ -L/usr/lib64 -L/usr/local/lib -L/usr/local/lib64 -L../..//output/lib -Xlinker "-(" http_client.o -Wl,-Bstatic -lgflags -lglog -lbrpc -Wl,-Bdynamic -Xlinker "-)" -lpthread -lssl -lcrypto -ldl -lz -lrt -lprotobuf -lleveldb -o http_client
../..//output/lib/libbrpc.a(pprof_service.o): In function brpc::PProfService::profile(google::protobuf::RpcController*, brpc::ProfileRequest const*, brpc::ProfileResponse*, google::protobuf::Closure*)': /home/work/incubator-brpc-1.1.0/src/brpc/builtin/pprof_service.cpp:103: undefined reference to ProfilerStart'
/home/work/incubator-brpc-1.1.0/src/brpc/builtin/pprof_service.cpp:139: undefined reference to ProfilerStart' ../..//output/lib/libbrpc.a(hotspots_service.o): In function brpc::DoProfiling(brpc::ProfilingType, google::protobuf::RpcController*, google::protobuf::Closure*)':
/home/work/incubator-brpc-1.1.0/src/brpc/builtin/hotspots_service.cpp:732: undefined reference to ProfilerStart' /home/work/incubator-brpc-1.1.0/src/brpc/builtin/hotspots_service.cpp:749: undefined reference to ProfilerStart'
http_client.o: In function main': /home/work/incubator-brpc-1.1.0/example/http_c++/../..//output/include/brpc/details/profiler_linker.h:46: undefined reference to ProfilerStart'
collect2: error: ld returned 1 exit status
make: *** [http_client] Error 1

To Reproduce (复现方法)

Expected behavior (期望行为)

Versions (各种版本)
OS: centos
Compiler: gcc 4.8.5
brpc: 1.1.0
protobuf: 3.6.1
gflags: 2.1.1
glog : 0.6.0
cmake : 3.23.1

Additional context/screenshots (更多上下文/截图)

[serverglen]

没有安装tcmalloc吧？