macOS 10.13 error: unknown type name 'uint8_t'

Hi,

I encountered this error running the very basic hello world tutorial

cythoning hello.pyx to hello.cpp
building 'hello' extension
creating build
creating build/temp.macosx-10.7-x86_64-3.6
gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/haotian/anaconda3/include -arch x86_64 -I/Users/haotian/anaconda3/include -arch x86_64 -I/Users/haotian/anaconda3/include/python3.6m -c hello.cpp -o build/temp.macosx-10.7-x86_64-3.6/hello.o -stdlib=libc++
In file included from hello.cpp:4:
In file included from /Users/haotian/anaconda3/include/python3.6m/Python.h:34:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/stdlib.h:94:
In file included from /usr/include/stdlib.h:65:
In file included from /usr/include/sys/wait.h:110:
/usr/include/sys/resource.h:196:2: error: unknown type name 'uint8_t'
        uint8_t  ri_uuid[16];
        ^
/usr/include/sys/resource.h:197:2: error: unknown type name 'uint64_t'
        uint64_t ri_user_time;
        ^
/usr/include/sys/resource.h:198:2: error: unknown type name 'uint64_t'
        uint64_t ri_system_time;
        ^
/usr/include/sys/resource.h:199:2: error: unknown type name 'uint64_t'
        uint64_t ri_pkg_idle_wkups;
        ^
/usr/include/sys/resource.h:200:2: error: unknown type name 'uint64_t'
        uint64_t ri_interrupt_wkups;
        ^
/usr/include/sys/resource.h:201:2: error: unknown type name 'uint64_t'
        uint64_t ri_pageins;
        ^
/usr/include/sys/resource.h:202:2: error: unknown type name 'uint64_t'
        uint64_t ri_wired_size;
        ^
/usr/include/sys/resource.h:203:2: error: unknown type name 'uint64_t'
        uint64_t ri_resident_size;
        ^
/usr/include/sys/resource.h:204:2: error: unknown type name 'uint64_t'
        uint64_t ri_phys_footprint;
        ^
/usr/include/sys/resource.h:205:2: error: unknown type name 'uint64_t'
        uint64_t ri_proc_start_abstime;
        ^
/usr/include/sys/resource.h:206:2: error: unknown type name 'uint64_t'
        uint64_t ri_proc_exit_abstime;
        ^
/usr/include/sys/resource.h:210:2: error: unknown type name 'uint8_t'
        uint8_t  ri_uuid[16];
        ^
/usr/include/sys/resource.h:211:2: error: unknown type name 'uint64_t'
        uint64_t ri_user_time;
        ^
/usr/include/sys/resource.h:212:2: error: unknown type name 'uint64_t'
        uint64_t ri_system_time;
        ^
/usr/include/sys/resource.h:213:2: error: unknown type name 'uint64_t'
        uint64_t ri_pkg_idle_wkups;
        ^
/usr/include/sys/resource.h:214:2: error: unknown type name 'uint64_t'
        uint64_t ri_interrupt_wkups;
        ^
/usr/include/sys/resource.h:215:2: error: unknown type name 'uint64_t'
        uint64_t ri_pageins;
        ^
/usr/include/sys/resource.h:216:2: error: unknown type name 'uint64_t'
        uint64_t ri_wired_size;
        ^
/usr/include/sys/resource.h:217:2: error: unknown type name 'uint64_t'
        uint64_t ri_resident_size;
        ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
error: command 'gcc' failed with exit status 1

I’m using python 3.6.3, Cython 0.27.3. Any idea why this is happening?