record cppdefine for incremental compilation

compiler/options.nim

@@ -245,9 +245,6 @@ template depConfigFields*(fn) {.dirty.} =
   fn(globalOptions)
   fn(selectedGC)
 
-template serializeConfigFields(fn) {.dirty.} =
-  fn(cppDefines) # XXX TODO: Replay this.
-
 const oldExperimentalFeatures* = {implicitDeref, dotOperators, callOperator, parallel}
 
 const

compiler/pragmas.nim

@@ -748,10 +748,12 @@ proc singlePragma(c: PContext, sym: PSym, n: PNode, i: var int,
       of wImportc:
         let name = getOptionalStr(c, it, "$1")
         cppDefine(c.config, name)
+        recordPragma(c, it, "cppdefine", name)
         makeExternImport(c, sym, name, it.info)
       of wImportCompilerProc:
         let name = getOptionalStr(c, it, "$1")
         cppDefine(c.config, name)
+        recordPragma(c, it, "cppdefine", name)
         processImportCompilerProc(c, sym, name, it.info)
       of wExtern: setExternName(c, sym, expectStrLit(c, it), it.info)
       of wImmediate:
@@ -844,6 +846,7 @@ proc singlePragma(c: PContext, sym: PSym, n: PNode, i: var int,
       of wCompilerProc, wCore:
         noVal(c, it)           # compilerproc may not get a string!
         cppDefine(c.graph.config, sym.name.s)
+        recordPragma(c, it, "cppdefine", sym.name.s)
         if sfFromGeneric notin sym.flags: markCompilerProc(c, sym)
       of wProcVar:
         noVal(c, it)

compiler/rodimpl.nim

@@ -793,6 +793,8 @@ proc replay(g: ModuleGraph; module: PSym; n: PNode) =
         extccomp.addLinkOption(g.config, n[1].strVal)
       of "passc":
         extccomp.addCompileOption(g.config, n[1].strVal)
+      of "cppdefine":
+        options.cppDefine(g.config, n[1].strVal)
       of "inc":
         let destKey = n[1].strVal
         let by = n[2].intVal