Re: jdk build fails due to "warning: ‘readdir_r’ is deprecated"

[David Holmes]

We already dealt with this in the VM:

http://hg.openjdk.java.net/jdk10/master/rev/f5f2a2d13775

by disabling the warning.

That suggests to me that this warning must have been disabled in the JDK 
build too. So perhaps recent flag reworking has modified that. ??

David

On 12/03/2018 5:15 PM, David Holmes wrote:
> Hi Thomas,
> 
> On 12/03/2018 5:02 PM, Thomas Stüfe wrote:
>> Hi all,
>>
>> maybe someone has an idea:
>>
>> I build on a freshly installed Linux instance (MX17), using gcc 6.3.0.
>>
>> I get this error:
>>
>> Creating support/modules_cmds/jdk.pack/unpack200 from 7 file(s)
>> /shared/projects/openjdk/jdk-hs/source/src/jdk.management/unix/native/libmanagement_ext/OperatingSystemImpl.c: 
>>
>> In function ‘read_dir’:
>> /shared/projects/openjdk/jdk-hs/source/src/jdk.management/unix/native/libmanagement_ext/OperatingSystemImpl.c:83:5: 
>>
>> warning: ‘readdir_r’ is deprecated [-Wdeprecated-declarations]
>>       if (readdir_r(dirp, entry, &p) == 0) {
>>       ^~
>> In file included from
>> /shared/projects/openjdk/jdk-hs/source/src/hotspot/os/posix/include/jvm_md.h:34:0, 
>>
>>                   from
>> /shared/projects/openjdk/jdk-hs/source/src/hotspot/share/include/jvm.h:32, 
>>
>>                   from
>> /shared/projects/openjdk/jdk-hs/source/src/jdk.management/unix/native/libmanagement_ext/OperatingSystemImpl.c:29: 
>>
>> /usr/include/dirent.h:183:12: note: declared here
>>   extern int readdir_r (DIR *__restrict __dirp,
>>              ^~~~~~~~~
>>
>> I digged and was not able to pin it to any recent change. I also think  I
>> never successfully built on this box, so it may be my environment.
>>
>> Could it be that my gcc is too new?
> 
> We've built with gcc 7 so it can't be that on its own. May be a 
> combination of gcc and glibc version. It was deprecated in glibc 2.24.
> 
> David
> 
>> Thanks! Thomas
>>