diff --git a/Makefile b/Makefile
index 50b2fa0..c0824ae 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,10 @@
-# 是否开启openmp 1 开启  0 不开启 单线程版本
+# 是否开启openmp，1 开启，0 不开启 单线程版本。
 OPENMP = 1
-# 是否生成汇编代码，生成的汇编代码在 asm 目录下。1 生成,0 不生成。
+# 是否生成汇编代码，生成的汇编代码在 asm 目录下。1 生成，0 不生成。
 ASM_COMPILE = 0
-# MKL_INT 和 ALPHA_INT 是否使用64位， 1 使用64位，0 使用32位。
+# MKL_INT 和 ALPHA_INT 是否使用64位，1 使用64位，0 使用32位。
 INT_64 = 0
-# 表示编不编译 
+# 表示编不编译
 HIP_ON = $(shell echo $${HIP_ON:-0})
 # PLAIN 依赖 mkl
 PLAIN_ON = $(shell echo $${PLAIN_ON:-1})
@@ -17,45 +17,51 @@ HYGON_ON = 0
 HAS_MKL = 0
 PLAIN_ON = 0
 ROOT = $(shell pwd)
+OS := $(shell uname -s)
 
 LIB_DIR = $(ROOT)/lib
-INC_DIR = $(ROOT)/include 
+INC_DIR = $(ROOT)/include
 OBJ_DIR = $(ROOT)/obj
 BIN_DIR = $(ROOT)/bin
 ASM_DIR = $(ROOT)/asm
 
-ifeq ($(DEBUG_ON),1)
+ifeq ($(DEBUG_ON), 1)
 CPPFLAGS += -ggdb
 endif
 
-ifeq ($(HIP_ON),1)
+ifeq ($(HIP_ON), 1)
 ROCM_DIR = /public/software/compiler/rocm/rocm-3.9.1
 ROCSP_DIR = /home/gcx/csparse
 endif
+
 LIBNAME = libalpha_spblas
 
-INC += -I$(INC_DIR) 
+INC += -I$(INC_DIR)
 
-ifeq ($(HIP_ON),1)
+ifeq ($(HIP_ON), 1)
 INC += -I$(ROCM_DIR)/hip/include
 endif
 
 export ROOT LIB_DIR INC_DIR OBJ_DIR BIN_DIR ASM_DIR INC DEFINE LIBNAME OPENMP ASM_COMPILE INT_64 HIP_ON PLAIN_ON HAS_MKL ARM_ON HYGON_ON
 GCC_VERSION_GE9_3_1 := $(shell expr `gcc --version | awk -F" " '/^gcc/{print $$3}' |  tr -d '.' ` \>= 931)
+
+ifneq ($(OS), Darwin)
 CPUVENDOR := $(shell lscpu | awk -F"[ ;]" '/^Vendor/ {print $$NF}' )
+endif
+
 MAKE = make
 CC = gcc
 HCC= hipcc
 AR = ar
-LDFLAGS = -L$(LIB_DIR) 
+LDFLAGS = -L$(LIB_DIR)
 
-CPPFLAGS += -std=c++11 -fPIC -Ofast  -I$(INC_DIR)
+CPPFLAGS += -std=c++11 -fPIC -Ofast -I$(INC_DIR)
 CFLAGS += -Ofast
 CFLAGS += -std=c11
 CFLAGS += -g
 ifeq ($(OPENMP), 1)
-CFLAGS += -fopenmp 
-CPPFLAGS += -fopenmp 
+CFLAGS += -fopenmp
+CPPFLAGS += -fopenmp
 endif
 # CFLAGS += -mcmodel=large
 CFLAGS += -Wall
@@ -70,20 +76,21 @@ CFLAGS += -fPIC
 # CFLAGS += -Wl,-z,relro -Wl,-z,noexecstack -Wl,-z,now
 
 ARCH = $(shell uname -m)
-ifeq ($(ARCH),aarch64)
+ifeq ($(ARCH), aarch64)
 CC = gcc
 DEFINE += -D__aarch64__
-ifeq ($(GCC_VERSION_GE9_3_1),1)
+ifeq ($(GCC_VERSION_GE9_3_1), 1)
 CFLAGS += -march=armv8.3-a
 DEFINE += -DCMLA
 endif
 endif
-ifeq ($(ARCH),x86_64)
+ifeq ($(ARCH), x86_64)
 CC = gcc
-ifeq ($(CPUVENDOR),GenuineIntel)
+ifneq ($(OS), Darwin)
+ifeq ($(CPUVENDOR), GenuineIntel)
 CC = icc
 endif
-CFLAGS += -march=native
+endif
 CFLAGS += -m64
 CFLAGS += -march=native
 DEFINE += -D__x86_64__
@@ -91,6 +98,18 @@ ifeq ($(HAS_MKL), 1)
 DEFINE += -D__MKL__
 endif
 endif
+ifeq ($(ARCH), ppc)
+CC = gcc
+CFLAGS += -mtune=native
+CFLAGS += -arch ppc
+DEFINE += -Dppc
+endif
+ifeq ($(ARCH), ppc64)
+CC = gcc
+CFLAGS += -mtune=native
+CFLAGS += -arch ppc64
+DEFINE += -Dppc64
+endif
 ifeq ($(CC), gcc)
 endif
 ifeq ($(CC), icc)
@@ -101,33 +120,35 @@ DEFINE += -DMKL_ILP64
 DEFINE += -DALPHA_INT=int64_t
 endif
 
+ifeq ($(HIP_ON), 1)
 CEXTRAFLAGS += -lstdc++ -L$(ROCM_DIR)/hip/lib -L$(ROCM_DIR)/rocsparse/lib -lamdhip64 -lrocsparse
-
-ifeq ($(HIP_ON),1)
 LDFLAGS += $(CEXTRAFLAGS)
 DEFINE += -D__DCU__
 endif
 
-ifeq ($(PLAIN_ON),1)
+ifeq ($(PLAIN_ON), 1)
 DEFINE += -D__PLAIN__
 endif
 
 export MAKE CC HCC AR CFLAGS CPPFLAGS CEXTRAFLAGS ARCH LDFLAGS
 
-.PHONY :  clean lib test tool
+.PHONY : clean lib so test
 
-all : lib test tool so
+all : lib so test
 
-lib : 
+lib :
 	$(MAKE) -C src $(@F)
 
-so : lib 
-	$(CC) -shared -o $(LIB_DIR)/$(LIBNAME).so -Wl,--whole-archive $(LIB_DIR)/$(LIBNAME).a -Wl,--no-whole-archive 
+# FIXME: this will not work on macOS:
+so : lib
+	$(CC) -shared -o $(LIB_DIR)/$(LIBNAME).so -Wl,--whole-archive $(LIB_DIR)/$(LIBNAME).a -Wl,--no-whole-archive
 
+# TODO: implement tests for PPC.
 test : lib
 	$(MAKE) -C test $(@F)
 
-# tool : 
+# TODO: implement tool target (needs fixes to makefiles).
+# tool :
 # 	$(MAKE) -C tools $(@F)
 
 clean :
diff --git a/Makefile.tail b/Makefile.tail
index edddeed..f703a34 100644
--- a/Makefile.tail
+++ b/Makefile.tail
@@ -51,15 +51,15 @@ SPBLASOBJS = $(XSSPBLASOBJS) $(XDSPBLASOBJS) $(XCSPBLASOBJS) $(XZSPBLASOBJS) \
 			 $(XSSPBLASOBJSCPP) $(XDSPBLASOBJSCPP) $(XCSPBLASOBJSCPP) $(XZSPBLASOBJSCPP) \
              $(FSSPBLASOBJSCPP) $(FDSPBLASOBJSCPP) $(CCSPBLASOBJSCPP) $(CZSPBLASOBJSCPP)
 
-$(XSSPBLASOBJS) $(FSSPBLASOBJS): override CFLAGS += -UDOUBLE  -UCOMPLEX
-$(XDSPBLASOBJS) $(FDSPBLASOBJS): override CFLAGS += -DDOUBLE  -UCOMPLEX
-$(XCSPBLASOBJS) $(CCSPBLASOBJS): override CFLAGS += -UDOUBLE  -DCOMPLEX
-$(XZSPBLASOBJS) $(CZSPBLASOBJS): override CFLAGS += -DDOUBLE  -DCOMPLEX
+$(XSSPBLASOBJS) $(FSSPBLASOBJS): override CFLAGS += -UDOUBLE -UCOMPLEX
+$(XDSPBLASOBJS) $(FDSPBLASOBJS): override CFLAGS += -DDOUBLE -UCOMPLEX
+$(XCSPBLASOBJS) $(CCSPBLASOBJS): override CFLAGS += -UDOUBLE -DCOMPLEX
+$(XZSPBLASOBJS) $(CZSPBLASOBJS): override CFLAGS += -DDOUBLE -DCOMPLEX
 
-$(XSSPBLASOBJSCPP) $(FSSPBLASOBJSCPP): override CPPFLAGS += -UDOUBLE  -UCOMPLEX
-$(XDSPBLASOBJSCPP) $(FDSPBLASOBJSCPP): override CPPFLAGS += -DDOUBLE  -UCOMPLEX
-$(XCSPBLASOBJSCPP) $(CCSPBLASOBJSCPP): override CPPFLAGS += -UDOUBLE  -DCOMPLEX
-$(XZSPBLASOBJSCPP) $(CZSPBLASOBJSCPP): override CPPFLAGS += -DDOUBLE  -DCOMPLEX
+$(XSSPBLASOBJSCPP) $(FSSPBLASOBJSCPP): override CPPFLAGS += -UDOUBLE -UCOMPLEX
+$(XDSPBLASOBJSCPP) $(FDSPBLASOBJSCPP): override CPPFLAGS += -DDOUBLE -UCOMPLEX
+$(XCSPBLASOBJSCPP) $(CCSPBLASOBJSCPP): override CPPFLAGS += -UDOUBLE -DCOMPLEX
+$(XZSPBLASOBJSCPP) $(CZSPBLASOBJSCPP): override CPPFLAGS += -DDOUBLE -DCOMPLEX
 
 .SECONDEXPANSION:
 
@@ -121,19 +121,19 @@ $(CZSPBLASOBJSCPP) : $(OBJ_DIR)/%.o : $$(subst _z_,_c_,%.cpp)
 	$(HCC) -c -o $@ $^ $(CPPFLAGS) -UONAME -DONAME=$(*F)
 
 $(COMMONOBJS) : $(OBJ_DIR)/%.o : %.c
-	$(CC) -c -o $@ $^ $(CFLAGS) -UONAME 
+	$(CC) -c -o $@ $^ $(CFLAGS) -UONAME
 
-$(COMMONOBJSCPP) : $(OBJ_DIR)/%.o : %.cpp	
-	$(HCC) -c -o $@ $^ $(CPPFLAGS) -UONAME 
+$(COMMONOBJSCPP) : $(OBJ_DIR)/%.o : %.cpp
+	$(HCC) -c -o $@ $^ $(CPPFLAGS) -UONAME
 
 $(ASMOBJS) : $(OBJ_DIR)/%.o : %.S
-	$(CC) -c -o $@ $^ $(CFLAGS) -UONAME 
+	$(CC) -c -o $@ $^ $(CFLAGS) -UONAME
 
 $(OBJ) : $(OBJ_DIR)/%.o : %.c
-	$(CC) -c -o $@ $^ $(CFLAGS) -UONAME 
+	$(CC) -c -o $@ $^ $(CFLAGS) -UONAME
 
 $(OBJCPP) : $(OBJ_DIR)/%.o : %.cpp
-	$(HCC) -c -o $@ $^ $(CPPFLAGS) -UONAME 
+	$(HCC) -c -o $@ $^ $(CPPFLAGS) -UONAME
 
 $(BIN_DIR)/% : $(OBJ_DIR)/%.o $(LIB_DIR)/libalpha_spblas.a $(TEST_COMMON_OBJS)
 	$(CC) -o $@ $^ $(CFLAGS) $(LDFLAGS)
diff --git a/include/alphasparse/opt.h b/include/alphasparse/opt.h
index 68cc4e7..20693d7 100644
--- a/include/alphasparse/opt.h
+++ b/include/alphasparse/opt.h
@@ -5,3 +5,8 @@
  */
 
 #include "alphasparse/util/thread.h"
+
+#ifndef __COMPAR_FN_T
+#define __COMPAR_FN_T
+    typedef int (*__compar_fn_t)(const void *, const void *);
+#endif
diff --git a/src/Makefile b/src/Makefile
index 3503b91..81cc0cc 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,24 +1,24 @@
 CFLAGS += $(INC) $(DEFINE)
 CPPFLAGS += $(INC) $(DEFINE)
 
-SUBDIRS = core kernel util tuning
+SUBDIRS = core kernel util
 
-ifeq ($(HIP_ON),1)
-SUBDIRS += util_cpp
-SUBDIRS += tuning
-endif
 ifeq ($(PLAIN_ON),1)
 SUBDIRS += plain
 endif
+ifeq ($(HIP_ON),1)
+SUBDIRS += util_cpp
+# SUBDIRS += tuning
+endif
 ifeq ($(ARM_ON),1)
-SUBDIRS += tuning
+# SUBDIRS += tuning
 endif
 
 .PHONY : lib
 
-lib : 
+lib :
 	@for d in $(SUBDIRS) ; \
 	do if test -d $$d; then \
 	  $(MAKE) -C $$d $(@F) || exit 1 ; \
 	fi; \
-	done
\ No newline at end of file
+	done
diff --git a/src/util/malloc.c b/src/util/malloc.c
index 824611f..75a9aa9 100644
--- a/src/util/malloc.c
+++ b/src/util/malloc.c
@@ -5,7 +5,7 @@
 
 #include "alphasparse/util/malloc.h"
 
-#include <malloc.h>
+#include <stdlib.h>
 #include <stdio.h>
 #include <time.h>
 
diff --git a/src/util_cpp/malloc_dcu.cpp b/src/util_cpp/malloc_dcu.cpp
index 28f248a..030062b 100644
--- a/src/util_cpp/malloc_dcu.cpp
+++ b/src/util_cpp/malloc_dcu.cpp
@@ -10,7 +10,7 @@ extern "C" {
 }
 #endif
 
-#include <malloc.h>
+#include <stdlib.h>
 #include <stdio.h>
 #include <time.h>
 #ifdef __DCU__
diff --git a/test/Makefile b/test/Makefile
index ea41074..4cbfb50 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -27,4 +27,4 @@ test :
 # CFLAGS += $(INC) -I$(ROOT)/test/include $(DEFINE)
 # CPPFLAGS += $(INC) -I$(ROOT)/test/include $(DEFINE)
 # $(TEST_COMMON_OBJS) : $(OBJ_DIR)/%.o : %.c
-# 	$(CC) -c -o $@ $^ $(CFLAGS) 
+# 	$(CC) -c -o $@ $^ $(CFLAGS)
diff --git a/test/dcu/Makefile b/test/dcu/Makefile
index 99c7041..2d541b4 100644
--- a/test/dcu/Makefile
+++ b/test/dcu/Makefile
@@ -10,6 +10,6 @@ TEST_BIN = $(patsubst %.cpp, $(BIN_DIR)/%, $(notdir $(TEST_SRC)) )
 CFLAGS += $(INC) $(LIB) $(DEFINE) -l:libalpha_spblas.a -lm -I$(ROOT)/test
 
 CPPFLAGS += $(INC) $(DEFINE) -I$(ROOT)/test
-LDFLAGS += -l:libalpha_spblas.a -lm -lstdc++ 
+LDFLAGS += -l:libalpha_spblas.a -lm -lstdc++
 CFLAGS += $(INC) $(DEFINE) -I$(ROOT)/test
 include $(ROOT)/Makefile.tail
diff --git a/test/x86_64/Makefile b/test/x86_64/Makefile
index f6bce0e..de7cea6 100644
--- a/test/x86_64/Makefile
+++ b/test/x86_64/Makefile
@@ -6,16 +6,16 @@ TEST_SRC = $(wildcard $(SRC_DIR)/*.c)
 OBJ = $(patsubst $(SRC_DIR)/%.c, $(OBJ_DIR)/%.o, $(TEST_SRC) )
 TEST_BIN = $(patsubst $(SRC_DIR)/%.c, $(BIN_DIR)/%, $(TEST_SRC) )
 
-CFLAGS += -lmkl_cdft_core  -lmkl_intel_thread -lmkl_core -lpthread -lmkl_rt -ldl
+CFLAGS += -lmkl_cdft_core -lmkl_intel_thread -lmkl_core -lpthread -lmkl_rt -ldl
 ifeq ($(INT_64),1)
-CFLAGS += -lmkl_intel_ilp64 
+CFLAGS += -lmkl_intel_ilp64
 else
-CFLAGS += -lmkl_intel_lp64 
+CFLAGS += -lmkl_intel_lp64
 endif
 ifeq ($(OPENMP),1)
 CFLAGS += -liomp5
 endif
 
-CFLAGS += $(INC) $(LIB) $(DEFINE) -l:libalphasparse.a -lm
+CFLAGS += $(INC) $(LIB) $(DEFINE) -l:libalpha_spblas.a -lm
 
 include $(ROOT)/Makefile.tail
diff --git a/tools/Makefile b/tools/Makefile
index 939a3b8..4bc6f26 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -8,4 +8,4 @@ TOOL_BIN = $(patsubst %.c, $(BIN_DIR)/%, $(TOOL_SRC) )
 
 CFLAGS = -w -g -O2 -std=c11 -lm
 
-include $(ROOT)/Makefile.tail
\ No newline at end of file
+include $(ROOT)/Makefile.tail
diff --git a/tools/reversible_sparse_gen.c b/tools/reversible_sparse_gen.c
index ceedf8e..39bd20d 100644
--- a/tools/reversible_sparse_gen.c
+++ b/tools/reversible_sparse_gen.c
@@ -8,6 +8,11 @@
 #include <time.h>
 #include <stdint.h>
 
+#ifndef __COMPAR_FN_T
+#define __COMPAR_FN_T
+    typedef int (*__compar_fn_t)(const void *, const void *);
+#endif
+
 inline static int random_int(int m)
 {
     return rand() % m;
diff --git a/tools/sparse_gen.c b/tools/sparse_gen.c
index 00ec853..c64b3d4 100644
--- a/tools/sparse_gen.c
+++ b/tools/sparse_gen.c
@@ -8,6 +8,11 @@
 #include <time.h>
 #include <stdint.h>
 
+#ifndef __COMPAR_FN_T
+#define __COMPAR_FN_T
+    typedef int (*__compar_fn_t)(const void *, const void *);
+#endif
+
 inline static int random_int(int m)
 {
     return rand() % m;
diff --git a/tools/sparse_gen_symv.c b/tools/sparse_gen_symv.c
index 1d7891d..2ad4c35 100644
--- a/tools/sparse_gen_symv.c
+++ b/tools/sparse_gen_symv.c
@@ -8,6 +8,11 @@
 #include <time.h>
 #include <stdint.h>
 
+#ifndef __COMPAR_FN_T
+#define __COMPAR_FN_T
+    typedef int (*__compar_fn_t)(const void *, const void *);
+#endif
+
 inline static int random_int(int m)
 {
     return rand() % m;