conflicting declaration of C function ‘float fsub(double, double)’

[usthyrj]

In file included from /usr/include/c++/9/cmath:45,
from /usr/include/c++/9/math.h:36,
from ABY/src/abycore/ENCRYPTO_utils/cbitvector.h:24,
from ABY/src/abycore/ENCRYPTO_utils/connection.h:24,
from ABY/src/abycore/ENCRYPTO_utils/connection.cpp:19:
/usr/include/x86_64-linux-gnu/bits/mathcalls-narrow.h:24:20: error: conflicting declaration of C function ‘float fadd(double, double)’
24 | __MATHCALL_NARROW (__MATHCALL_NAME (add), __MATHCALL_REDIR_NAME (add), 2);

I'm sorry to bother you, but I was wondering if you could help me with this problem.