无法从google协议缓冲区编译示例 [英] Can't compile example from google protocol buffers

问题描述

我grep的其他主题，但他们不帮助我=（。
在我的工作服务器，我没有sudo权限，所以我安装PB

I grep for other topics, but they dont help me =(. On my working server, i have no sudo privilegies, so i install PB with

./ configure --prefix = / home / username / local

./configure --prefix=/home/username/local

我没有pkg-info =（。我尝试用

I have no pkg-info =(. I try to compile it with

g ++ -I / home / username / local / include -L / home / username / local / lib -lprotobuf
-lpthread main.cpp person.pb。 cc

g++ -I /home/username/local/include -L /home/username/local/lib -lprotobuf -lpthread main.cpp person.pb.cc

，然后会出现十亿个错误，例如

and then have a billion simular errors i.e.

person.pb.cc :(。text + 0x4cf）：未定义的引用
`google :: protobuf :: internal :: kEmptyString'

person.pb.cc:(.text+0x4cf): undefined reference to `google::protobuf::internal::kEmptyString'

我认为这是一个链接问题，但是如何解决呢？

I think, that it is a problem with linking, but how to solve it?

echo $ LD_LIBRARY_PATH
/ home / username / local / lib

echo $LD_LIBRARY_PATH /home/username/local/lib

在main.cpp中：

in main.cpp:

#include "person.pb.h"
...

b
$ b

感谢。

Thanks.

推荐答案

将库结束：

g ++ -I / home / username / local / include -L / home / username / local / lib main.cpp person.pb.cc -lprotobuf -pthread

g++ -I /home/username/local/include -L /home/username/local/lib main.cpp person.pb.cc -lprotobuf -pthread

从 GCC链接选项：

-llibrary
-l library
    Search the library named library when linking. 
    (The second alternative with the library as a separate argument
    is only for POSIX compliance and is not recommended.)

    It makes a difference where in the command you write this option;
    the linker searches and processes libraries and object files in the
    order they are specified.
    Thus, `foo.o -lz bar.o' searches library `z' after file foo.o but
    before bar.o. If bar.o refers to functions in `z', those functions
    may not be loaded.

此外，使用 -pthread 而不是 -lpthread as -pthread 可为预处理器和链接器设置标志。

Also, use -pthread instead of -lpthread as -pthread may set flags for preprocessor and linker.

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