[PATCH] malloc: Fix MALLOC_DEBUG -Wundef warning

[Carlos O'Donell]

On 04/08/2014 08:34 AM, Will Newton wrote:
> On 31 March 2014 16:04, Will Newton <will.newton@linaro.org> wrote:
>> MALLOC_DEBUG is set optionally on the command line. Default the value
>> to zero if it is not set on the command line, and test its value
>> with #if rather than #ifdef. Verified the code is identical before
>> and after this change apart from line numbers.
>>
>> ChangeLog:
>>
>> 2014-03-31  Will Newton  <will.newton@linaro.org>
>>
>>         * malloc/malloc.c [!MALLOC_DEBUG]: #define MALLOC_DEBUG
>>         to zero if it is not defined elsewhere.  (mtrim): Test
>>         the value of MALLOC_DEBUG with #if rather than #ifdef.
>> ---
>>  malloc/malloc.c | 6 +++++-
>>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> Ping?
> 
>> diff --git a/malloc/malloc.c b/malloc/malloc.c
>> index 9a45707..1120d4d 100644
>> --- a/malloc/malloc.c
>> +++ b/malloc/malloc.c
>> @@ -270,6 +270,10 @@
>>    or other mallocs available that do this.
>>  */
>>
>> +#ifndef MALLOC_DEBUG
>> +#define MALLOC_DEBUG 0
>> +#endif
>> +
>>  #ifdef NDEBUG
>>  # define assert(expr) ((void) 0)
>>  #else
>> @@ -4477,7 +4481,7 @@ mtrim (mstate av, size_t pad)
>>
>>                  if (size > psm1)
>>                    {
>> -#ifdef MALLOC_DEBUG
>> +#if MALLOC_DEBUG
>>                      /* When debugging we simulate destroying the memory
>>                         content.  */
>>                      memset (paligned_mem, 0x89, size & ~psm1);

Looks good to me.

Cheers,
Carlos.