libmodbus编译时libc和newlib库sigval等重复定于

发布于 2021-12-23 15:45:18 浏览：1338 订阅该版

```
xia@linux:~/codedate/stm32f407v04$ scons
/home/xia/.local/lib/python3.8/site-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: 0.1.36ubuntu1 is an invalid version and will not be supported in a future release
  warnings.warn(
/home/xia/.local/lib/python3.8/site-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning: 0.23ubuntu1 is an invalid version and will not be supported in a future release
  warnings.warn(
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
scons: building associated VariantDir targets: build
CC build/applications/main.o
In file included from /usr/include/newlib/signal.h:6,
                 from /home/xia/rt-thread/include/libc/libc_signal.h:71,
                 from /home/xia/rt-thread/include/rtlibc.h:21,
                 from /home/xia/rt-thread/include/rtdef.h:1087,
                 from /home/xia/rt-thread/include/rtthread.h:24,
                 from applications/main.c:11:
/usr/include/newlib/sys/signal.h:42:7: error: redefinition of 'union sigval'
   42 | union sigval {
      |       ^~~~~~
In file included from /home/xia/rt-thread/include/rtlibc.h:21,
                 from /home/xia/rt-thread/include/rtdef.h:1087,
                 from /home/xia/rt-thread/include/rtthread.h:24,
                 from applications/main.c:11:
/home/xia/rt-thread/include/libc/libc_signal.h:27:7: note: originally defined here
   27 | union sigval
      |       ^~~~~~
In file included from /usr/include/newlib/signal.h:6,
                 from /home/xia/rt-thread/include/libc/libc_signal.h:71,
                 from /home/xia/rt-thread/include/rtlibc.h:21,
                 from /home/xia/rt-thread/include/rtdef.h:1087,
                 from /home/xia/rt-thread/include/rtthread.h:24,
                 from applications/main.c:11:
/usr/include/newlib/sys/signal.h:47:8: error: redefinition of 'struct sigevent'
   47 | struct sigevent {
      |        ^~~~~~~~
In file included from /home/xia/rt-thread/include/rtlibc.h:21,
                 from /home/xia/rt-thread/include/rtdef.h:1087,
                 from /home/xia/rt-thread/include/rtthread.h:24,
                 from applications/main.c:11:
/home/xia/rt-thread/include/libc/libc_signal.h:35:8: note: originally defined here
   35 | struct sigevent
      |        ^~~~~~~~
In file included from /usr/include/newlib/signal.h:6,
                 from /home/xia/rt-thread/include/libc/libc_signal.h:71,
                 from /home/xia/rt-thread/include/rtlibc.h:21,
                 from /home/xia/rt-thread/include/rtdef.h:1087,
                 from /home/xia/rt-thread/include/rtthread.h:24,
                 from applications/main.c:11:
/usr/include/newlib/sys/signal.h:72:3: error: conflicting types for 'siginfo_t'
   72 | } siginfo_t;
      |   ^~~~~~~~~
In file included from /home/xia/rt-thread/include/rtlibc.h:21,
                 from /home/xia/rt-thread/include/rtdef.h:1087,
                 from /home/xia/rt-thread/include/rtthread.h:24,
                 from applications/main.c:11:
/home/xia/rt-thread/include/libc/libc_signal.h:54:24: note: previous declaration of 'siginfo_t' was here
   54 | typedef struct siginfo siginfo_t;
      |                        ^~~~~~~~~
scons: *** [build/applications/main.o] Error 1
scons: building terminated because of errors.

在Ubuntu20.04环境下通过menuconfig使用libmodbus软件包编译时出现库重复定义问题，帮看下是什么问题

```