build error on OS X: conflicting types for 'snprintf' about libasr HOT 5 CLOSED

/Applications/Xcode-beta.app/Contents/Developer/usr/bin/make  all-recursive
Making all in openbsd-compat
gcc -DHAVE_CONFIG_H -I. -I..  -I../smtpd -I../openbsd-compat -I/usr/local/include -I/usr/local/opt/libressl//include   -g -O2  -Wall -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security -Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result -fno-strict-aliasing -fno-builtin-memset  -c -o arc4random.o arc4random.c
gcc -DHAVE_CONFIG_H -I. -I..  -I../smtpd -I../openbsd-compat -I/usr/local/include -I/usr/local/opt/libressl//include   -g -O2  -Wall -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security -Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result -fno-strict-aliasing -fno-builtin-memset  -c -o base64.o base64.c
In file included from base64.c:58:0:
/usr/include/stdio.h:421:6: error: conflicting types for 'snprintf'
 int  snprintf(char * __restrict, size_t, const char * __restrict, ...) __printflike(3, 4);
      ^
In file included from includes.h:77:0,
                 from base64.c:47:
openbsd-compat.h:152:5: note: previous declaration of 'snprintf' was here
 int snprintf(char *, size_t, SNPRINTF_CONST char *, ...);
     ^
make[2]: *** [base64.o] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2