rosserial找不到math函数的库

发布于 2019-08-08 11:35:07 浏览：1865 订阅该版

* 本帖最后由 deepsky2018 于 2019-8-8 11:46 编辑 *

大家好，在ubuntu16.04下使用gcc-arm-none-eabi工具链+stlink编译rosserial，rtt为最新版本，报错找不到math库中的函数。是需要改rtconfig.py的编译选项吗， -lm之类的好像不管用？谢谢！

编译信息如下：
```CXX build/packages/rosserial-latest/examples/hello_world_serial.o
In file included from packages/rosserial-latest/src/ros/time.h:38:0,
                 from packages/rosserial-latest/src/std_msgs/Time.h:8,
                 from packages/rosserial-latest/src/ros/node_handle.h:40,
                 from packages/rosserial-latest/port/ros.h:5,
                 from packages/rosserial-latest/examples/hello_world_serial.cpp:2:
packages/rosserial-latest/src/ros/duration.h: In member function 'double ros::Duration::round(double)':
packages/rosserial-latest/src/ros/duration.h:64:37: error: 'floor' was not declared in this scope
     return (r > 0.0) ? floor(r + 0.5) : ceil(r - 0.5);
                                     ^
packages/rosserial-latest/src/ros/duration.h:64:53: error: 'ceil' was not declared in this scope
     return (r > 0.0) ? floor(r + 0.5) : ceil(r - 0.5);
                                                     ^
packages/rosserial-latest/src/ros/duration.h: In member function 'void ros::Duration::fromSec(double)':
packages/rosserial-latest/src/ros/duration.h:69:29: error: 'floor' was not declared in this scope
     sec = (uint32_t) floor(t);
                             ^
```