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-rw-r--r--mk/validate-settings.mk4
1 files changed, 2 insertions, 2 deletions
diff --git a/mk/validate-settings.mk b/mk/validate-settings.mk
index f0d8de1a2a..6afac177a6 100644
--- a/mk/validate-settings.mk
+++ b/mk/validate-settings.mk
@@ -19,9 +19,9 @@ SRC_HC_OPTS += -Wall $(WERROR) -H64m -O0
# Safe by default
#SRC_HC_OPTS += -Dsh_SAFE_DEFAULT
-GhcStage1HcOpts += -O
+GhcStage1HcOpts += -O -fwarn-tabs
-GhcStage2HcOpts += -O
+GhcStage2HcOpts += -O -fwarn-tabs
# Using -O (rather than -O0) here bringes my validate down from 22mins to 16 mins.
# Compiling stage2 takes longer, but we gain a faster haddock, faster
# running of the tests, and faster building of the utils to be installed