共享库编译 gcc

Question

我正在尝试编译使用 libwebsockets 库的程序。

我已经在我的 linux 机器上下载并编译了 libwebsockets 并且具有以下目录结构。

/libwebsockets/build/bin/  -> contains the compiled binaries (test-server,test-client etc)

/libwebsockets/build/lib/  -> contains the shared libraries. libwebsockets.so libwebsockets.a libwebsockets.so.5.0.0             

/libwebsockets/lib/ -> contains all the header files. eg: libwebsockets.h libwebsockets.c

/libwebsockets/test-server -> contains application programs..(test-server.c test-client.c etc)

现在我创建了我的 C 程序文件 simple-server.c /libwebsockets/test-server目录。

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <syslog.h>
#include <signal.h>
#include <libwebsockets.h>

当我尝试编译这个程序时：

gcc -L/home/gadre/Desktop/Testing/libwebsockets/build/lib/ -lwebsockets simple-server.c -o s

我收到链接器错误：

simple-server.c:(.text+0x14c): undefined reference to `lwsl_emit_syslog'
simple-server.c:(.text+0x158): undefined reference to `lws_set_log_level'
simple-server.c:(.text+0x16d): undefined reference to `libwebsocket_get_internal_extensions'
simple-server.c:(.text+0x1a5): undefined reference to `libwebsocket_create_context'
simple-server.c:(.text+0x1c4): undefined reference to `_lws_log'
simple-server.c:(.text+0x1e9): undefined reference to `libwebsocket_service'
simple-server.c:(.text+0x209): undefined reference to `libwebsocket_context_destroy'
simple-server.c:(.text+0x21d): undefined reference to `_lws_log'

如何解决这个问题..我也尝试将路径放在 LD_LIBRARY_PATH 中。但链接器仍然找不到共享库。

Answer 1

我现在可以编译了...我使用了以下命令。使用运行时间 link 选项。

gcc -L/home/gadre/Desktop/Testing/libwebsockets/build/lib -Wl,-rpath=/home/gadre/Desktop/Testing/libwebsockets/build/lib -Wall -o server incr_server.c -lwebsockets

我不知道具体细节，但目前可以使用

共享库编译 gcc

Shared library compilation gcc

c

gcc

websocket

linker-errors

undefined-reference