Use ifeq instead of ifdef for user-definable options

Author: martin-frbg

driver/others/Makefile

@@ -7,7 +7,7 @@ COMMONOBJS	 = memory.$(SUFFIX) xerbla.$(SUFFIX) c_abs.$(SUFFIX) z_abs.$(SUFFIX)
 
 ifdef SMP
 COMMONOBJS	+= blas_server.$(SUFFIX) divtable.$(SUFFIX) blasL1thread.$(SUFFIX)
-ifndef NO_AFFINITY
+ifneq ($(NO_AFFINITY), 1)
 COMMONOBJS	+= init.$(SUFFIX)
 endif
 endif
@@ -32,11 +32,11 @@ else
 COMMONOBJS	+=  parameter.$(SUFFIX)
 endif
 
-ifdef EXPRECISION
+ifeq ($(EXPRECISION), 1)
 COMMONOBJS	+= x_abs.$(SUFFIX) qlamch.$(SUFFIX) qlamc3.$(SUFFIX)
 endif
 
-ifdef QUAD_PRECISION
+ifeq ($(QUAD_PRECISION), 1)
 COMMONOBJS	+= addx.$(SUFFIX) mulx.$(SUFFIX)
 endif
 
@@ -46,11 +46,9 @@ ifeq ($(C_COMPILER), PGI)
 endif
 endif
 
-ifdef USE_CUDA
 ifeq ($(USE_CUDA), 1)
 COMMONOBJS	+= cuda_init.$(SUFFIX)
 endif
-endif
 
 ifdef FUNCTION_PROFILE
 COMMONOBJS	+= profile.$(SUFFIX)