Locks modules should give a compile error when threads are not enabled. (#12231)

* Locks modules should give a compile error when threads are not enabled.

* fix the compile flags to make the tests pass, or ignore files where necessary.

* Fixed when statement to account for doc builds.

lib/core/locks.nim

@@ -9,6 +9,10 @@
 
 ## This module contains Nim's support for locks and condition vars.
 
+
+when not compileOption("threads") and not defined(nimdoc):
+  {.error: "Locks requires --threads:on option.".}
+
 const insideRLocksModule = false
 include "system/syslocks"
 

lib/core/rlocks.nim

@@ -9,6 +9,10 @@
 
 ## This module contains Nim's support for reentrant locks.
 
+
+when not compileOption("threads") and not defined(nimdoc):
+  {.error: "Rlocks requires --threads:on option.".}
+
 const insideRLocksModule = true
 include "system/syslocks"
 

testament/testament.nim

@@ -558,6 +558,10 @@ const disabledFilesDefault = @[
   "setimpl.nim",
   "hashcommon.nim",
 
+  # Requires compiling with '--threads:on`
+  "sharedlist.nim",
+  "sharedtables.nim",
+
   # Error: undeclared identifier: 'hasThreadSupport'
   "ioselectors_epoll.nim",
   "ioselectors_kqueue.nim",

tests/stdlib/tsharedtable.nim

@@ -1,4 +1,5 @@
 discard """
+cmd: "nim $target --threads:on $options $file"
 output: '''
 '''
 """