continue booting the compiler with refc (#20421)

* continue boot the compiler with refc

* koch

* use `gc:refc`

.github/workflows/ci_docs.yml

@@ -100,7 +100,7 @@ jobs:
 
       - name: 'Build the real compiler'
         shell: bash
-        run: ./koch boot -d:release --gc:refc
+        run: ./koch boot -d:release
 
       - name: 'Build documentation'
         shell: bash

compiler/nim.cfg

@@ -6,6 +6,7 @@ define:booting
 define:nimcore
 define:nimPreviewFloatRoundtrip
 define:nimPreviewSlimSystem
+gc:refc
 
 #import:"$projectpath/testability"
 

koch.nim

@@ -548,7 +548,7 @@ proc runCI(cmd: string) =
   # boot without -d:nimHasLibFFI to make sure this still works
   # `--lib:lib` is needed for bootstrap on openbsd, for reasons described in
   # https://github.com/nim-lang/Nim/pull/14291 (`getAppFilename` bugsfor older nim on openbsd).
-  kochExecFold("Boot in release mode", "boot -d:release --gc:refc -d:nimStrictMode --lib:lib")
+  kochExecFold("Boot in release mode", "boot -d:release -d:nimStrictMode --lib:lib")
 
   when false: # debugging: when you need to run only 1 test in CI, use something like this:
     execFold("debugging test", "nim r tests/stdlib/tosproc.nim")