diff --git a/HISTORY b/HISTORY
index fd99931..b745b96 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,8 +1,9 @@
 
-Version 5.12  2017-10-16
+Version 5.12  2018-05-23
  * code refine for rare case
  * replace print format OFF_PRINTF_FORMAT to PRId64
  * php_ext fix zend_object_store_get_object call in php5.5
+ * make.sh uses macros define in /usr/include/fastcommon/_os_define.h
 
 Version 5.11  2017-05-26
  * bug fixed: file_offset has no effect when use trunk file
diff --git a/client/Makefile.in b/client/Makefile.in
index 6140564..7d702ee 100644
--- a/client/Makefile.in
+++ b/client/Makefile.in
@@ -52,7 +52,7 @@ all: $(ALL_OBJS) $(ALL_PRGS) $(ALL_LIBS)
 libfdfsclient.so:
 	$(COMPILE) -o $@ $< -shared $(FDFS_SHARED_OBJS) $(LIB_PATH)
 libfdfsclient.a:
-	ar cru $@ $< $(FDFS_STATIC_OBJS)
+	ar rcs $@ $< $(FDFS_STATIC_OBJS)
 .o:
 	$(COMPILE) -o $@ $<  $(STATIC_OBJS) $(LIB_PATH) $(INC_PATH)
 .c:
diff --git a/make.sh b/make.sh
index 2514884..4a3ed1e 100755
--- a/make.sh
+++ b/make.sh
@@ -1,51 +1,3 @@
-tmp_src_filename=fdfs_check_bits.c
-cat <<EOF > $tmp_src_filename
-#include <stdio.h>
-#include <unistd.h>
-#include <fcntl.h>
-int main()
-{
-	printf("%d\n", (int)sizeof(long));
-	printf("%d\n", (int)sizeof(off_t));
-	return 0;
-}
-EOF
-
-gcc -D_FILE_OFFSET_BITS=64 -o a.out $tmp_src_filename
-output=$(./a.out)
-
-if [ -f /bin/expr ]; then
-  EXPR=/bin/expr
-else
-  EXPR=/usr/bin/expr
-fi
-
-count=0
-int_bytes=4
-off_bytes=8
-for col in $output; do
-    if [ $count -eq 0 ]; then
-        int_bytes=$col
-    else
-        off_bytes=$col
-    fi
-
-    count=$($EXPR $count + 1)
-done
-
-/bin/rm -f a.out $tmp_src_filename
-if [ "$int_bytes" -eq 8 ]; then
- OS_BITS=64
-else
- OS_BITS=32
-fi
-
-if [ "$off_bytes" -eq 8 ]; then
- OFF_BITS=64
-else
- OFF_BITS=32
-fi
-
 ENABLE_STATIC_LIB=0
 ENABLE_SHARED_LIB=1
 TARGET_PREFIX=$DESTDIR/usr
@@ -58,16 +10,30 @@ DEBUG_FLAG=1
 
 CFLAGS='-Wall -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE'
 if [ "$DEBUG_FLAG" = "1" ]; then
-  CFLAGS="$CFLAGS -g -O -DDEBUG_FLAG"
+  CFLAGS="$CFLAGS -g -O1 -DDEBUG_FLAG"
 else
   CFLAGS="$CFLAGS -O3"
 fi
 
+if [ -f /usr/include/fastcommon/_os_define.h ]; then
+  OS_BITS=$(fgrep OS_BITS /usr/include/fastcommon/_os_define.h | awk '{print $NF;}')
+elif [ -f /usr/local/include/fastcommon/_os_define.h ]; then
+  OS_BITS=$(fgrep OS_BITS /usr/local/include/fastcommon/_os_define.h | awk '{print $NF;}')
+else
+  OS_BITS=64
+fi
+
+if [ "$OS_BITS" -eq 64 ]; then
+  LIB_VERSION=lib64
+else
+  LIB_VERSION=lib
+fi
+
 LIBS=''
 
 uname=$(uname)
 if [ "$uname" = "Linux" ]; then
-  if [ $OS_BITS -eq 64 ]; then
+  if [ "$OS_BITS" -eq 64 ]; then
     LIBS="$LIBS -L/usr/lib64"
   else
     LIBS="$LIBS -L/usr/lib"
diff --git a/storage/trunk_mgr/trunk_mem.c b/storage/trunk_mgr/trunk_mem.c
index b0a051f..95d078a 100644
--- a/storage/trunk_mgr/trunk_mem.c
+++ b/storage/trunk_mgr/trunk_mem.c
@@ -1710,7 +1710,7 @@ static int trunk_wait_file_ready(const char *filename, const int64_t file_size,
 			return 0;
 		}
 
-		if (abs(g_current_time - file_mtime) > 10)
+		if (labs(g_current_time - file_mtime) > 10)
 		{
 			return ETIMEDOUT;
 		}