Compilation fails on Debian buster, "wrong" use of -Isystem

[jkur]

Compiling on Debian/buster with gcc-8 fails :
[...]
[ 14%] Building CXX object CMakeFiles/rviz_visual_tools_remote_control.dir/src/remote_control.cpp.o
In file included from /usr/include/c++/8/ext/string_conversions.h:41,
from /usr/include/c++/8/bits/basic_string.h:6400,
from /usr/include/c++/8/string:52,
from /home/jkur/dev/ros/ros-testbed/src/rviz_visual_tools/src/remote_control.cpp:40:
/usr/include/c++/8/cstdlib:75:15: fatal error: stdlib.h: Datei oder Verzeichnis nicht gefunden
#include_next <stdlib.h>

A vague search suggest a wrong use of the -Isystem flag with gcc-8 (and gcc-7).

Removing "SYSTEM" from CMakeLists.txt :78

include_directories(include ${catkin_INCLUDE_DIRS} ${EIGEN3_INCLUDE_DIRS} ${OGRE_OV_INCLUDE_DIRS})

fixes this issue for me. I'm unsure if this is a general fix or breaks something elsewhere...