[PATCH mtd-utils 4/5] configure.ac: Add a check for execinfo and backtrace

[Khem Raj]

On 2/18/25 3:01 AM, Fabio Estevam wrote:
> Hi Zhihao,
> 
> Thanks for your review.
> 
> On Tue, Feb 18, 2025 at 6:48 AM Zhihao Cheng <chengzhihao1 at huawei.com> wrote:
> 
>> Hi Fabio,
>> I'm not sure which lib is depended for execinfo by musl. We don't depend
>> any libs for other common compilers, otherwise we could get following
>> messgags for doing configure:
> 
> The musl library doe not provide execinfo.
> It relies on an external execinfo library to provide backtrace support.
> 
>>    checking for sys/random.h... yes
>> checking for backtrace in -lexecinfo... no  # In fact backtrace is
>> supported, but the message tells us not.
> 
> That message is OK. In this case, the backtrace does not come from the
> external libexecinfo.
> It comes from the C library. It does not mean that backtrace is not
> supported. It only means that
> backtrace does not come from the external libexecinfo.
> 
> With musl, the following is seen:
> 
> checking for backtrace in -lexecinfo... yes
> 
> This means that backtrace comes from the external libexecinfo.

maybe check for backtrace function in libc first and if not found then 
try libexecinfo check.

> 
> I will address your other comments and submit a v2 soon.
> 
> Thanks
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