[Buildroot] [PATCH 2/2] host-m4: fix build when -std=gnu99 and inline functions are used

[Arnout Vandecappelle]

On 02/25/16 16:33, Alexey Brodkin wrote:
> Hi Thomas,
> 
> On Thu, 2016-02-25 at 14:26 +0100, Thomas Petazzoni wrote:
>> Hello,
>>
>> On Thu, 25 Feb 2016 12:58:05 +0000, Lada Trimasova wrote:
>>
>>> I used CentOS 5.7, gcc 4.9.2, glibc 2.5.
[snip explanation of why this combination of gcc 4.9 with glibc 2.5 is broken]
> That's why with older host glibc we need to pass "-fgnu89-inline"
> flag to compiler.

 I think you can basically say your host toolchain is broken: it fails to
compile valid programs, because glibc doesn't satisfy the -std=gnu99 option.

> And now I think we may even consider adding it
> to the top-level HOST_CFLAGS instead of fixing problem on per-package
> basis.

 Since this is an issue with your toolchain, I think you should fix it globally
(not just for buildroot) by setting CFLAGS_FOR_BUILD=-fgnu89-inline in your
environment.


 Note: installing your own glibc (somewhere outside of /usr/lib) is possible,
but awkward.

 Regards,
 Arnout

> 
> Any thoughts?
> 
> And indeed we now have to determine last glibc version that relies on
> C89 inline semantics.
> 
> -Alexey
> 
> P.S. Just in case that article was of great help:
> http://stackoverflow.com/questions/2722276/multiple-definition-of-inline-function
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Arnout Vandecappelle                          arnout at mind be
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