linux - 编译 AR Drone SDK 失败，命令行缺少 DSO

Question

我正在尝试在 Ubuntu 上构建 AR Drone SDK。编译库时出现错误:

//lib/x86_64-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

我不明白这是什么问题。我正在关注 this tutorial当我运行 make 时出现问题。我已经运行 ARDroneLib/Soft/Build/check_dependencies.sh 并且它输出正常。

知道问题出在哪里吗？以下是运行 make 的完整输出。

soribo@soribo-vm:~/Projects/ARDrone/ARDrone_SDK_2_0_1/Examples/Linux$ make
make[1]: Entering directory `/home/soribo/Projects/ARDrone/ARDrone_SDK_2_0_1/ARDroneLib/Soft/Build'
Libs already extracted
Building target static
Architecture x86_64 is already built
Creating universal static lib file from architectures x86_64
Build done.
Checking required Ubuntu packages ...
ok.
Building ARDroneTool/Lib
Building ARDroneTool/Lib
make[1]: Leaving directory `/home/soribo/Projects/ARDrone/ARDrone_SDK_2_0_1/ARDroneLib/Soft/Build'
make[1]: Entering directory `/home/soribo/Projects/ARDrone/ARDrone_SDK_2_0_1/Examples/Linux/Navigation/Build'
-- Building ardrone_navigation -- 
Libs already extracted
Building target static
Architecture x86_64 is already built
Creating universal static lib file from architectures x86_64
Build done.
Checking required Ubuntu packages ...
ok.
Building ARDroneTool/Lib
Building ARDroneTool/Lib
-- Linking ardrone_navigation --
ld common/mobile_main
/usr/bin/ld: ../../Soft/Build/targets_versions/ffmpeg_static_PROD_MODE_Linux_3.19.0-25-generic_GNU_Linux_usrbingcc_4.8.4/libavutil.a(eval.o): undefined reference to symbol 'fabs@@GLIBC_2.2.5'
//lib/x86_64-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[4]: *** [/home/soribo/Projects/ARDrone/ARDrone_SDK_2_0_1/Examples/Linux/Navigation/Build/../../Build/Release/common/mobile_main] Error 1
make[3]: *** [all] Error 2
make[2]: *** [build_app] Error 2
make[1]: *** [ardrone_navigation] Error 2
make[1]: Leaving directory `/home/soribo/Projects/ARDrone/ARDrone_SDK_2_0_1/Examples/Linux/Navigation/Build'
make: *** [all] Error 2

Answer 1

我遇到了同样的问题。我在这里找到了解决方案:

http://jderobot.org/Varribas-tfm/ARDrone:starting_up#Building_Examples

Looking for undefined reference to symbol 'fabs@@GLIBC_2.2.5', I reached to [2], that confirms an unmeet dependency problem [1]. What happened here?

libavutil.a(eval.o): undefined reference to symbol 'fabs@@GLIBC_2.2.5'
libm.so.6: error adding symbols: DSO missing from command line 

First line say us that libavutil is using fabs. It is declared into libm library, but -lm is missed in command line (Makefile).

ARDrone_SDK_2_0_1/Examples/Linux/Navigation/Build/Makefile:131
GENERIC_LIBS+=-liw -lpc_ardrone -lgthread-2.0 -lgtk-x11-2.0 -lrt -lxml2 -ludev -lswscale -lSDL -lm

Then, Navigation will compile successfully.