需求如题，从网上下载了memtest源码压缩包，准备放到系统源码编译，然后push到板子上执行，结果，编译出来一堆问题，报build err。

    做如下代码改动：

 external/memtester-4.5.1/Android.mk  | 16 ++++++++++++++++
 external/memtester-4.5.1/memtester.c |  8 ++++----
 2 files changed, 20 insertions(+), 4 deletions(-)
 create mode 100644 external/memtester-4.5.1/Android.mk

diff --git a/external/memtester-4.5.1/Android.mk b/external/memtester-4.5.1/Android.mk
new file mode 100644
index 0000000000..86cf6d8935
--- /dev/null
+++ b/external/memtester-4.5.1/Android.mk
@@ -0,0 +1,16 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := memtester.c tests.c
+
+LOCAL_MODULE := memtester
+
+LOCAL_CFLAGS += -Wall -Wno-unused-parameter
+
+LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog
+
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)
+
+include $(BUILD_EXECUTABLE)
diff --git a/external/memtester-4.5.1/memtester.c b/external/memtester-4.5.1/memtester.c
index 44d331e2cf..e6d86635e2 100755
--- a/external/memtester-4.5.1/memtester.c
+++ b/external/memtester-4.5.1/memtester.c
@@ -117,7 +117,7 @@ int main(int argc, char **argv) {
     ulv *bufa, *bufb;
     int do_mlock = 1, done_mem = 0;
     int exit_code = 0;
-    int memfd, opt, memshift;
+    int memfd, opt, memshift = 0;
     size_t maxbytes = -1; /* addressable memory, in bytes */
     size_t maxmb = (maxbytes >> 20) + 1; /* addressable memory, in MB */
     /* Device to mmap memory from with -p, default is normal core */
@@ -139,7 +139,7 @@ int main(int argc, char **argv) {
     /* If MEMTESTER_TEST_MASK is set, we use its value as a mask of which
        tests we run.
      */
-    if (env_testmask = getenv("MEMTESTER_TEST_MASK")) {
+    if (env_testmask == getenv("MEMTESTER_TEST_MASK")) {
         errno = 0;
         testmask = strtoul(env_testmask, 0, 0);
         if (errno) {
@@ -310,7 +310,7 @@ int main(int argc, char **argv) {
             fflush(stdout);
             if ((size_t) buf % pagesize) {
                 /* printf("aligning to page -- was 0x%tx\n", buf); */
-                aligned = (void volatile *) ((size_t) buf & pagesizemask) + pagesize;
+                aligned = (void volatile *) (((size_t) buf & pagesizemask) + pagesize);
                 /* printf("  now 0x%tx -- lost %d bytes\n", aligned,
                  *      (size_t) aligned - (size_t) buf);
                  */
@@ -363,7 +363,7 @@ int main(int argc, char **argv) {
        define out the use of mlock() (cough HP/UX 10 cough). */
     if ((size_t) buf % pagesize) {
         /* printf("aligning to page -- was 0x%tx\n", buf); */
-        aligned = (void volatile *) ((size_t) buf & pagesizemask) + pagesize;
+        aligned = (void volatile *) (((size_t) buf & pagesizemask) + pagesize);
         /* printf("  now 0x%tx -- lost %d bytes\n", aligned,
          *      (size_t) aligned - (size_t) buf);
          */
-- 

编译好后push到android设备里面，测试前需先在android看里面设置环境变量

export MEMTESTER_TEST_MASK=0

执行memtester输出结果如下：

Mark。