Merge pull request nim-lang#2010 from modk/freebsd-parallel-build

Fix parallel build on FreeBSD

lib/posix/posix.nim

@@ -1405,14 +1405,6 @@ var
     ## Report status of stopped child process.
   WEXITSTATUS* {.importc, header: "<sys/wait.h>".}: cint
     ## Return exit status.
-  WIFCONTINUED* {.importc, header: "<sys/wait.h>".}: cint
-    ## True if child has been continued.
-  WIFEXITED* {.importc, header: "<sys/wait.h>".}: cint
-    ## True if child exited normally.
-  WIFSIGNALED* {.importc, header: "<sys/wait.h>".}: cint
-    ## True if child exited due to uncaught signal.
-  WIFSTOPPED* {.importc, header: "<sys/wait.h>".}: cint
-    ## True if child is currently stopped.
   WSTOPSIG* {.importc, header: "<sys/wait.h>".}: cint
     ## Return signal number that caused process to stop.
   WTERMSIG* {.importc, header: "<sys/wait.h>".}: cint
@@ -1559,6 +1551,14 @@ var
   MSG_OOB* {.importc, header: "<sys/socket.h>".}: cint
     ## Out-of-band data.
 
+proc WIFCONTINUED*(s:cint) : bool {.importc, header: "<sys/wait.h>".}
+  ## True if child has been continued.
+proc WIFEXITED*(s:cint) : bool {.importc, header: "<sys/wait.h>".}
+  ## True if child exited normally.
+proc WIFSIGNALED*(s:cint) : bool {.importc, header: "<sys/wait.h>".}
+  ## True if child exited due to uncaught signal.
+proc WIFSTOPPED*(s:cint) : bool {.importc, header: "<sys/wait.h>".}
+  ## True if child is currently stopped.
 
 when defined(linux):
   var

lib/pure/osproc.nim

@@ -848,7 +848,14 @@ elif not defined(useNimRtl):
     if kill(p.id, SIGCONT) != 0'i32: raiseOsError(osLastError())
 
   proc running(p: Process): bool =
-    var ret = waitpid(p.id, p.exitCode, WNOHANG)
+    var ret : int
+    when not defined(freebsd):
+      ret = waitpid(p.id, p.exitCode, WNOHANG)
+    else:
+      var status : cint = 1
+      ret = waitpid(p.id, status, WNOHANG)
+      if WIFEXITED(status):
+        p.exitCode = status
     if ret == 0: return true # Can't establish status. Assume running.
     result = ret == int(p.id)