1st_error

/bin/sh ./libtool  --tag=CXX   --mode=compile c++ -std=gnu++11 -DHAVE_CONFIG_H -I.  -I./external/bitcoin-ripemd160/ -I./external/libsodium/src/libsodium/include/ -I./external/secp256k1/include/ -I./external/jsmn  -Wall -Werror -pthread -I/usr/local/include  -I/usr/local/include  -I/usr/local/include -g -O2 -MT Bitcoin/libclboss_la-hash160.lo -MD -MP -MF Bitcoin/.deps/libclboss_la-hash160.Tpo -c -o Bitcoin/libclboss_la-hash160.lo `test -f 'Bitcoin/hash160.cpp' || echo './'`Bitcoin/hash160.cpp
libtool: compile:  c++ -std=gnu++11 -DHAVE_CONFIG_H -I. -I./external/bitcoin-ripemd160/ -I./external/libsodium/src/libsodium/include/ -I./external/secp256k1/include/ -I./external/jsmn -Wall -Werror -pthread -I/usr/local/include -I/usr/local/include -I/usr/local/include -g -O2 -MT Bitcoin/libclboss_la-hash160.lo -MD -MP -MF Bitcoin/.deps/libclboss_la-hash160.Tpo -c Bitcoin/hash160.cpp -o Bitcoin/libclboss_la-hash160.o
In file included from Bitcoin/hash160.cpp:1:
./Bitcoin/hash160.hpp:21:40: error: no type named 'size_t' in namespace 'std'; did you mean '__size_t'?
Ripemd160::Hash hash160(void const* p, std::size_t len);
                                       ^~~~~~~~~~~
                                       __size_t
/usr/include/x86/_types.h:110:20: note: '__size_t' declared here
typedef __uint64_t      __size_t;               /* sizeof() */
                        ^
In file included from Bitcoin/hash160.cpp:1:
./Bitcoin/hash160.hpp:23:23: error: no type named 'size_t' in namespace 'std'; did you mean '__size_t'?
            , void const* p, std::size_t len
                             ^~~~~~~~~~~
                             __size_t
/usr/include/x86/_types.h:110:20: note: '__size_t' declared here
typedef __uint64_t      __size_t;               /* sizeof() */