small fixes for BSD

config/nimrod.cfg

@@ -63,6 +63,9 @@ hint[LineTooLong]=off
     gcc.options.linker = "-ldl"
     clang.options.linker = "-ldl"
     tcc.options.linker = "-ldl"
+  @else:
+    # BSD got posix_spawn only recently, so we deactivate it for osproc:
+    define:useFork
   @end
 @end
 

lib/pure/os.nim

@@ -1377,7 +1377,7 @@ proc getAppFilename*(): string {.rtl, extern: "nos$1".} =
     result = getApplAux("/proc/" & $getpid() & "/path/a.out")
   elif defined(bsd):
     result = getApplAux("/proc/" & $getpid() & "/file")
-  elif defined(macosx):
+  elif defined(macosx) or defined(bsd):
     var size: int32
     getExecPath1(nil, size)
     result = newString(int(size))