bionetgen-2.2.5-8.fc24 fails to build in F24:

g++ -DHAVE_CONFIG_H -I. -I..  -I/usr/include -I../muparser_v2_2_3/include -I../cvode-2.6.0/include   -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -c -o run_network-network.o `test -f 'network.cpp' || echo './'`network.cpp
[...]
In file included from network.cpp:52:0:
network.h:42:28: error: 'int isnan(double)' conflicts with a previous declaration
 extern "C" int isnan(double);
                            ^

This seems to be triggered by GCC 6.