[commit: ghc] master: Add some llvm build options to build.mk.sample (6b58460)

[David Terei]

Repository : ssh://darcs.haskell.org//srv/darcs/ghc

On branch  : master

http://hackage.haskell.org/trac/ghc/changeset/6b58460309598b399fba1bdd223da7bc96d07431

>---------------------------------------------------------------

commit 6b58460309598b399fba1bdd223da7bc96d07431
Author: David Terei <davidterei at gmail.com>
Date:   Fri Jan 13 13:51:47 2012 -0800

    Add some llvm build options to build.mk.sample

>---------------------------------------------------------------

 mk/build.mk.sample |   27 ++++++++++++++++++++++++++-
 1 files changed, 26 insertions(+), 1 deletions(-)

diff --git a/mk/build.mk.sample b/mk/build.mk.sample
index 10ab7af..e979f39 100644
--- a/mk/build.mk.sample
+++ b/mk/build.mk.sample
@@ -10,6 +10,9 @@
 # Full build with max optimisation and everything enabled (very slow build)
 #BuildFlavour = perf
 
+# As above but build GHC using the LLVM backend
+#BuildFlavour = perf-llvm
+
 # Fast build with optimised libraries, no profiling (RECOMMENDED):
 #BuildFlavour = quick
 
@@ -51,6 +54,23 @@ endif
 
 endif
 
+# ---------------- Perf build using LLVM -------------------------------------
+
+ifeq "$(BuildFlavour)" "perf-llvm"
+
+SRC_HC_OPTS     = -O -H64m -fllvm
+GhcStage1HcOpts = -O -fllvm
+GhcStage2HcOpts = -O2 -fllvm
+GhcHcOpts       = -Rghc-timing
+GhcLibHcOpts    = -O2
+GhcLibWays     += p
+
+ifeq "$(PlatformSupportsSharedLibs)" "YES"
+GhcLibWays += dyn
+endif
+
+endif
+
 # -------- A Fast build ------------------------------------------------------
 
 ifeq "$(BuildFlavour)" "quickest"
@@ -151,10 +171,14 @@ endif
 
 ifeq "$(BuildFlavour)" "unreg"
 
+# Note that the LLVM backend works in unregisterised mode as well as
+# registerised mode. This often makes it a good choice for porting
+# GHC.
+
 GhcUnregisterised    = YES
 GhcWithNativeCodeGen = NO
 
-SRC_HC_OPTS          = -O -H64m
+SRC_HC_OPTS          = -O -H64m # -fllvm
 GhcStage1HcOpts      = -O
 GhcStage2HcOpts      = -O2
 GhcHcOpts            = -Rghc-timing
@@ -173,3 +197,4 @@ endif
 # NoFib settings
 NoFibWays =
 STRIP_CMD = :
+