Index: Makefile.generic
--- Makefile.generic.orig	2018-12-02 23:41:17.000000000 +0100
+++ Makefile.generic	2018-12-03 09:42:33.961471000 +0100
@@ -1 +1 @@
-COPT	= -Wall -O2 # -DGEMMTEST
+COPT	= -O2 # -DGEMMTEST
Index: Makefile.system
--- Makefile.system.orig	2018-12-02 23:41:17.000000000 +0100
+++ Makefile.system	2018-12-03 09:43:29.002606000 +0100
@@ -582,7 +582,7 @@
 # ifeq logical or. GCC or CLANG or LSB
 # http://stackoverflow.com/questions/7656425/makefile-ifeq-logical-or
 ifeq ($(C_COMPILER), $(filter $(C_COMPILER),GCC CLANG LSB))
-CCOMMON_OPT += -Wall
+CCOMMON_OPT += 
 COMMON_PROF += -fno-inline
 NO_UNINITIALIZED_WARN =  -Wno-uninitialized
 
@@ -685,9 +685,9 @@
 FCOMMON_OPT += -i8
 endif
 endif
-FCOMMON_OPT += -Wall
+FCOMMON_OPT +=
 else
-FCOMMON_OPT += -Wall
+FCOMMON_OPT +=
 endif
 ifeq ($(USE_OPENMP), 1)
 FCOMMON_OPT += -fopenmp
@@ -696,7 +696,7 @@
 
 ifeq ($(F_COMPILER), G77)
 CCOMMON_OPT += -DF_INTERFACE_G77
-FCOMMON_OPT += -Wall
+FCOMMON_OPT += 
 ifndef NO_BINARY_MODE
 ifneq ($(OSNAME), AIX)
 ifdef BINARY64
@@ -710,7 +710,7 @@
 
 ifeq ($(F_COMPILER), G95)
 CCOMMON_OPT += -DF_INTERFACE_G95
-FCOMMON_OPT += -Wall
+FCOMMON_OPT +=
 ifneq ($(OSNAME), AIX)
 ifndef NO_BINARY_MODE
 ifdef BINARY64
@@ -724,7 +724,7 @@
 
 ifeq ($(F_COMPILER), GFORTRAN)
 CCOMMON_OPT += -DF_INTERFACE_GFORT
-FCOMMON_OPT += -Wall
+FCOMMON_OPT +=
 # make single-threaded LAPACK calls thread-safe #1847
 FCOMMON_OPT += -frecursive
 #Don't include -lgfortran, when NO_LAPACK=1 or lsbcc
