fixes DLL generation

lib/system/embedded.nim

@@ -15,7 +15,7 @@ proc chckRange(i, a, b: int): int {.inline, compilerproc.}
 proc chckRangeF(x, a, b: float): float {.inline, compilerproc.}
 proc chckNil(p: pointer) {.inline, compilerproc.}
 
-proc pushFrame(s: PFrame) {.compilerRtl, inl, exportc: "nimFrame".} = discard
+proc nimFrame(s: PFrame) {.compilerRtl, inl, exportc: "nimFrame".} = discard
 proc popFrame {.compilerRtl, inl.} = discard
 
 proc setFrame(s: PFrame) {.compilerRtl, inl.} = discard

lib/system/excpt.nim

@@ -44,9 +44,15 @@ var
     # a global variable for the root of all try blocks
   currException {.rtlThreadVar.}: ref E_Base
 
-proc pushFrame(s: PFrame) {.compilerRtl, inl, exportc: "nimFrame".} =
-  s.prev = framePtr
-  framePtr = s
+when defined(nimRequiresNimFrame):
+  proc nimFrame(s: PFrame) {.compilerRtl, inl, exportc: "nimFrame".} =
+    s.prev = framePtr
+    framePtr = s
+else:
+  proc pushFrame(s: PFrame) {.compilerRtl, inl, exportc: "nimFrame".} =
+    # XXX only for backwards compatibility
+    s.prev = framePtr
+    framePtr = s
 
 proc popFrame {.compilerRtl, inl.} =
   framePtr = framePtr.prev

lib/system/inclrtl.nim

@@ -30,9 +30,9 @@ when defined(createNimRtl):
   {.pragma: inl.}
   {.pragma: compilerRtl, compilerproc, exportc: "nimrtl_$1", dynlib.}
 elif defined(useNimRtl):
-  when hostOS == "windows": 
+  when defined(windows): 
     const nimrtl* = "nimrtl.dll"
-  elif hostOS == "macosx":
+  elif defined(macosx):
     const nimrtl* = "nimrtl.dylib"
   else: 
     const nimrtl* = "libnimrtl.so"