[ 34%] Building CXX object src/CMakeFiles/zdoom.dir/sound/fmodsound.cpp.o
[ 34%] Building CXX object src/CMakeFiles/zdoom.dir/sound/mpg123_decoder.cpp.o
[ 34%] Building CXX object src/CMakeFiles/zdoom.dir/sound/music_midi_base.cpp.o
In file included from /home/mchan223/doom/gzdoom-5adf7463cddb42c3d1b10d6a4337fc98604d23cf/src/swrenderer/r_all.cpp:13:0:

/home/mchan223/doom/gzdoom-5adf7463cddb42c3d1b10d6a4337fc98604d23cf/src/swrenderer/line/r_walldraw.cpp:49:12: 
error: ‘constexpr bool std::isnan(double)’ conflicts with a previous declaration
 using std::isnan;
            ^
In file included from /usr/include/features.h:374:0,
                 from /usr/include/stdlib.h:24,
                 from /home/mchan223/doom/gzdoom-5adf7463cddb42c3d1b10d6a4337fc98604d23cf/src/swrenderer/r_memory.cpp:14,
                 
from /home/mchan223/doom/gzdoom-5adf7463cddb42c3d1b10d6a4337fc98604d23cf/src/swrenderer/r_all.cpp:1:

/usr/include/x86_64-linux-gnu/bits/mathcalls.h:234:1: note: previous declaration ‘int isnan(double)’
 
__MATHDECL_1 (int,isnan,, (_Mdouble_ __value)) __attribute__ ((__const__));
 ^
[ 34%] Building CXX object src/CMakeFiles/zdoom.dir/sound/oalsound.cpp.o
[ 35%] Building CXX object src/CMakeFiles/zdoom.dir/sound/sndfile_decoder.cpp.o
[ 35%] Building CXX object src/CMakeFiles/zdoom.dir/sound/mididevices/music_timiditypp_mididevice.cpp.o

src/CMakeFiles/zdoom.dir/build.make:559: recipe for target 'src/CMakeFiles/zdoom.dir/swrenderer/r_all.cpp.o' 
failed
make[2]: *** [src/CMakeFiles/zdoom.dir/swrenderer/r_all.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
CMakeFiles/Makefile2:719: recipe for target 'src/CMakeFiles/zdoom.dir/all' failed
make[1]: *** [src/CMakeFiles/zdoom.dir/all] Error 2
Makefile:117: recipe for target 'all' failed
make: *** [all] Error 2