From 63dd6723703c0fc57cf863a974993c6b66e019bc Mon Sep 17 00:00:00 2001
From: jao <jao@gnu.org>
Date: Sat, 1 Dec 2018 02:51:08 +0000
Subject: Propagating RTS compilation flags to recompile

---
 src/Xmobar/App/Compile.hs | 17 +++++++++++++----
 xmobar.cabal              |  3 +++
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/Xmobar/App/Compile.hs b/src/Xmobar/App/Compile.hs
index 3332c45..6c136dc 100644
--- a/src/Xmobar/App/Compile.hs
+++ b/src/Xmobar/App/Compile.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE CPP #-}
+
 ------------------------------------------------------------------------------
 -- |
 -- Module: Xmobar.App.Compile
@@ -71,9 +73,9 @@ shouldRecompile verb src bin lib = do
       trace verb "Xmobar doing recompile because some files have changed."
       return True
     else do
-      trace verb "Xmobar skipping recompile because it is not forced \
-                 \ (e.g. via --recompile), and not any *.hs / *.lhs / *.hsc \
-                 \ files in lib/ have been changed."
+      trace verb $ "Xmobar skipping recompile because it is not forced "
+                   ++ "(e.g. via --recompile), and not any *.hs / *.lhs / *.hsc"
+                   ++ "files in lib/ have been changed."
       return False
   where isSource = flip elem [".hs",".lhs",".hsc"] . takeExtension
         allFiles t = do
@@ -159,7 +161,14 @@ recompile dir execName force verb = liftIO $ do
         return (status == ExitSuccess)
       else return True
  where opts bin = ["--make" , execName ++ ".hs" , "-i" , "-ilib"
-                  , "-fforce-recomp" , "-main-is", "main" , "-v0" , "-o", bin]
+                  , "-fforce-recomp" , "-main-is", "main" , "-v0"]
+#ifdef THREADED_RUNTIME
+                  ++ ["-threaded"]
+#endif
+#ifdef DRTSOPTS
+                  ++ ["-rtsopts", "-with-rtsopts", "-V0"]
+#endif
+                  ++ ["-o", bin]
        runGHC bin = runProc "ghc" (opts bin)
        runScript script bin = runProc script [bin]
 
diff --git a/xmobar.cabal b/xmobar.cabal
index e96c4a2..d7ea53a 100644
--- a/xmobar.cabal
+++ b/xmobar.cabal
@@ -190,6 +190,9 @@ library
        ghc-options: -threaded
        cpp-options: -DTHREADED_RUNTIME
 
+    if flag(with_rtsopts)
+       cpp-options: -DRTSOPTS
+
     if flag(with_xft) || flag(all_extensions)
        build-depends: utf8-string >= 0.3 && < 1.1, X11-xft >= 0.2 && < 0.4
        other-modules: Xmobar.X11.MinXft
-- 
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