[commit: ghc] master: Only build iserv with -threaded if GhcThreaded is set (317ceb4)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/317ceb41e1efe0566178090fa077c4e6f4f03f10/ghc

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

commit 317ceb41e1efe0566178090fa077c4e6f4f03f10
Author: Reid Barton <rwbarton at gmail.com>
Date:   Sun Apr 23 10:03:22 2017 -0400

    Only build iserv with -threaded if GhcThreaded is set
    
    By default GhcThreaded is set by
    ```
    GhcThreaded = $(if $(findstring thr,$(GhcRTSWays)),YES,NO)
    ```
    so it seems incorrect to try to build iserv with -threaded when
    GhcThreaded is not set. This came up when I was building GHC with
    some strange combination of flavours (debugged and profiled but not
    threaded).
    
    Test Plan: harbormaster
    
    Reviewers: simonmar, austin, bgamari
    
    Reviewed By: bgamari
    
    Subscribers: thomie, snowleopard
    
    Differential Revision: https://phabricator.haskell.org/D3429


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

317ceb41e1efe0566178090fa077c4e6f4f03f10
 iserv/ghc.mk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/iserv/ghc.mk b/iserv/ghc.mk
index 8497313..ff8b153 100644
--- a/iserv/ghc.mk
+++ b/iserv/ghc.mk
@@ -20,9 +20,11 @@ iserv_stage2_p_MORE_HC_OPTS += -debug
 iserv_stage2_dyn_MORE_HC_OPTS += -debug
 endif
 
+ifeq "$(GhcThreaded)" "YES"
 iserv_stage2_MORE_HC_OPTS += -threaded
 iserv_stage2_p_MORE_HC_OPTS += -threaded
 iserv_stage2_dyn_MORE_HC_OPTS += -threaded
+endif
 
 # Add -Wl,--export-dynamic enables GHCi to load dynamic objects that
 # refer to the RTS.  This is harmless if you don't use it (adds a bit