xcode Mac OS X Sierra：体系结构 x86_64 的未定义符号
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Mac OS X Sierra : Undefined symbols for architecture x86_64
提问by SoftDev
I am trying to build a C source file based on Linphone in Mac OS X Sierra but getting the following error.
我正在尝试在 Mac OS X Sierra 中构建基于 Linphone 的 C 源文件，但出现以下错误。
This is the link for the C source file. http://www.linphone.org/docs/liblinphone/group__basic__call__tutorials.html
这是 C 源文件的链接。 http://www.linphone.org/docs/liblinphone/group__basic__call__tutorials.html
Edited:
编辑：
I am trying to compile the source code with this command
我正在尝试使用此命令编译源代码
clang -o tt tt.c -I/Users/softdev/Downloads/linphone-sdk-3.11.1-mac/include/
clang -o tt tt.c -I/Users/softdev/Downloads/linphone-sdk-3.11.1-mac/include/
Error:
错误：
Undefined symbols for architecture x86_64
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
体系结构 x86_64
ld 的未定义符号：未找到体系结构 x86_64
clang 的符号：错误：链接器命令失败，退出代码为 1（使用 -v 查看调用）
I have tried to change the target cpu but didn't work.
我曾尝试更改目标 cpu 但没有奏效。
My system has XCode 8. Any help regarding this will be appreciated.
我的系统有 XCode 8。对此的任何帮助将不胜感激。
Edited: Complete Output
编辑：完成输出
Undefined symbols for architecture x86_64:
"_linphone_call_get_state", referenced from:
_main in tt-ca2045.o
"_linphone_call_ref", referenced from:
_main in tt-ca2045.o
"_linphone_call_unref", referenced from:
_main in tt-ca2045.o
"_linphone_core_destroy", referenced from:
_main in tt-ca2045.o
"_linphone_core_invite", referenced from:
_main in tt-ca2045.o
"_linphone_core_iterate", referenced from:
_main in tt-ca2045.o
"_linphone_core_new", referenced from:
_main in tt-ca2045.o
"_linphone_core_terminate_call", referenced from:
_main in tt-ca2045.o
"_ms_usleep", referenced from:
_main in tt-ca2045.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
采纳答案by Michael Dautermann
I got the sample code to compile using this:
我得到了使用这个编译的示例代码：
clang -o hello hello.c -Ilinphone-sdk-3/include -Llinphone-sdk-3/lib -llinphone -lmediastreamer_base
Clang's -Iparameter points to the where the header (.h) files live
Clang 的-I参数指向头文件 (.h) 所在的位置
And as for my additions, -Lspecifies the pathfor clang to get to where the lib files live. In your case, it might live in -L/Users/softdev/Downloads/linphone-sdk-3.11.1-mac/lib
至于我的补充，-L指定了clang 到达 lib 文件所在位置的路径。在你的情况下，它可能住在-L/Users/softdev/Downloads/linphone-sdk-3.11.1-mac/lib
then -lspecifies which dylibs you want to include (strip off the libprefix and the dylibsuffix).
然后-l指定要包含哪些 dylib（去掉lib前缀和dylib后缀）。
Lastly, you need to add a missing line to the sample code you pointed to. Add:
最后，您需要在您指向的示例代码中添加一个缺失的行。添加：
#include <unistd.h>
after signal.h
后 signal.h
