Hash :
66a4eb0c
        
        Author :
  
        
        Date :
2017-03-06T00:05:50
        
      
Check for WNOWAIT in waitpid() in runtime (not in cmake/configure)
Because checking in cmake breaks cross-compiling.
Introduced-in: 43eb56c7c738e3642f0981e3dd6ab9e082eec798.
Fixes: #482
Fixes: #462
Refs: #475
v2: use waitid() with WNOWAIT
v3: use WNOWAIT only if it available in waitpid(), because not all netbsd
    supports it