1 files changed, 50 insertions, 0 deletions
diff --git a/lib/system/inclrtl.nim b/lib/system/inclrtl.nim
new file mode 100644
index 000000000..3bf0b9893
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+++ b/lib/system/inclrtl.nim
@@ -0,0 +1,50 @@
+#
+#
+#            Nim's Runtime Library
+#        (c) Copyright 2015 Andreas Rumpf
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+# Pragmas for RTL generation. Has to be an include, because user-defined
+# pragmas cannot be exported.
+
+# There are 3 different usages:
+# 1) Ordinary imported code.
+# 2) Imported from nimrtl.
+#    -> defined(useNimRtl) or appType == "lib" and not defined(createNimRtl)
+# 3) Exported into nimrtl.
+#    -> appType == "lib" and defined(createNimRtl)
+when not defined(nimNewShared):
+  {.pragma: gcsafe.}
+
+when defined(createNimRtl):
+  when defined(useNimRtl):
+    {.error: "Cannot create and use nimrtl at the same time!".}
+  elif appType != "lib":
+    {.error: "nimrtl must be built as a library!".}
+
+when defined(createNimRtl):
+  {.pragma: rtl, exportc: "nimrtl_$1", dynlib, gcsafe.}
+  {.pragma: inl.}
+  {.pragma: compilerRtl, compilerproc, exportc: "nimrtl_$1", dynlib.}
+elif defined(useNimRtl):
+  #[
+  `{.rtl.}` should only be used for non-generic procs.
+  ]#
+  const nimrtl* =
+    when defined(windows): "nimrtl.dll"
+    elif defined(macosx): "libnimrtl.dylib"
+    else: "libnimrtl.so"
+  {.pragma: rtl, importc: "nimrtl_$1", dynlib: nimrtl, gcsafe.}
+  {.pragma: inl.}
+  {.pragma: compilerRtl, compilerproc, importc: "nimrtl_$1", dynlib: nimrtl.}
+else:
+  {.pragma: rtl, gcsafe.}
+  {.pragma: inl, inline.}
+  {.pragma: compilerRtl, compilerproc.}
+
+{.pragma: benign, gcsafe.}
+
+{.push sinkInference: on.}