diff --git a/config/dunnington/bli_config.h b/config/dunnington/bli_config.h
index 22fc0a412..b397f3c94 100644
--- a/config/dunnington/bli_config.h
+++ b/config/dunnington/bli_config.h
@@ -69,7 +69,7 @@
 // -- MULTITHREADING -----------------------------------------------------------
 
 // The maximum number of BLIS threads that will run concurrently.
-#define BLIS_MAX_NUM_THREADS             24
+#define BLIS_MAX_NUM_THREADS             1
 
 
 
@@ -80,7 +80,7 @@
 // The number of MC x KC, KC x NC, and MC x NC blocks to reserve in the
 // contiguous memory pools.
 #define BLIS_NUM_MC_X_KC_BLOCKS          BLIS_MAX_NUM_THREADS
-#define BLIS_NUM_KC_X_NC_BLOCKS          4
+#define BLIS_NUM_KC_X_NC_BLOCKS          1
 #define BLIS_NUM_MC_X_NC_BLOCKS          0
 
 // The maximum preload byte offset is used to pad the end of the contiguous
diff --git a/config/dunnington/make_defs.mk b/config/dunnington/make_defs.mk
index b8af82d5d..a1f741d8e 100644
--- a/config/dunnington/make_defs.mk
+++ b/config/dunnington/make_defs.mk
@@ -80,7 +80,7 @@ CC             := gcc
 # Enable IEEE Standard 1003.1-2004 (POSIX.1d). 
 # NOTE: This is needed to enable posix_memalign().
 CPPROCFLAGS    := -D_POSIX_C_SOURCE=200112L
-CMISCFLAGS     := -std=c99 -fopenmp #-pg
+CMISCFLAGS     := -std=c99 # -fopenmp -pg
 CDBGFLAGS      := #-g
 CWARNFLAGS     := -Wall
 COPTFLAGS      := -O2 -mfpmath=sse -fomit-frame-pointer
@@ -100,7 +100,7 @@ ARFLAGS        := cru
 
 # --- Determine the linker and related flags ---
 LINKER         := $(CC)
-LDFLAGS        := -lm -fopenmp
+LDFLAGS        := -lm
 
 
 
diff --git a/config/reference/bli_config.h b/config/reference/bli_config.h
index 2078a080d..f6be2e573 100644
--- a/config/reference/bli_config.h
+++ b/config/reference/bli_config.h
@@ -69,7 +69,7 @@
 // -- MULTITHREADING -----------------------------------------------------------
 
 // The maximum number of BLIS threads that will run concurrently.
-#define BLIS_MAX_NUM_THREADS             2
+#define BLIS_MAX_NUM_THREADS             1
 
 
 
diff --git a/config/reference/make_defs.mk b/config/reference/make_defs.mk
index a1e884808..ab2b5a462 100644
--- a/config/reference/make_defs.mk
+++ b/config/reference/make_defs.mk
@@ -76,14 +76,14 @@ GIT_LOG    := $(GIT) log --decorate
 #
 
 # --- Determine the C compiler and related flags ---
-CC             := gcc-4.8
+CC             := gcc
 # Enable IEEE Standard 1003.1-2004 (POSIX.1d). 
 # NOTE: This is needed to enable posix_memalign().
 CPPROCFLAGS    := -D_POSIX_C_SOURCE=200112L
-CMISCFLAGS     := -std=c99 -fopenmp # -pg
+CMISCFLAGS     := -std=c99 # -fopenmp -pg
 CDBGFLAGS      := -g
 CWARNFLAGS     := -Wall
-COPTFLAGS      := -O0 -g
+COPTFLAGS      := -O2
 CKOPTFLAGS     := $(COPTFLAGS)
 CVECFLAGS      := #-msse3 -march=native # -mfpmath=sse
 
@@ -100,7 +100,7 @@ ARFLAGS        := cru
 
 # --- Determine the linker and related flags ---
 LINKER         := $(CC)
-LDFLAGS        := -fopenmp -lm
+LDFLAGS        := -lm