[Buildroot] [PATCH] util-linux: link scriptreplay with libm (for isnan)

[Carlos Santos]

> From: "Thomas Petazzoni" <thomas.petazzoni at free-electrons.com>
> To: "Carlos Santos" <casantos at datacom.ind.br>
> Cc: buildroot at buildroot.org
> Sent: Thursday, February 9, 2017 7:14:44 PM
> Subject: Re: [Buildroot] [PATCH] util-linux: link scriptreplay with libm (for isnan)

> Hello,
> 
> On Wed,  8 Feb 2017 13:17:43 -0200, Carlos Santos wrote:
>> - Cherry-pick a patch from upstream to link scriptreplay to libm (for
>>   "isnam").
>> - Add a patch that improves the detection of isnan when using uClibc.
>>   This patch is for util-linux v2.29.1 and must be adapted to their
>>   master branch to be submitted upstream.
>> 
>> Fixes:
>>   http://autobuild.buildroot.net/results/2c2/2c29a78ed81ca844a87dcd076ab3e14ea080296d
>>   http://autobuild.buildroot.net/results/404/404b10f359b2ae8a7216729fa1bab37fed2d3d4c
>> 
>> Signed-off-by: Carlos Santos <casantos at datacom.ind.br>
>> ---
>>  ...-sys-use-lm-for-scriptreplay-if-necessary.patch | 32 +++++++++++++++++++
>>  ...mprove-detection-of-the-isnan-function-in.patch | 37 ++++++++++++++++++++++
>>  2 files changed, 69 insertions(+)
>>  create mode 100644
>>  package/util-linux/0001-build-sys-use-lm-for-scriptreplay-if-necessary.patch
>>  create mode 100644
>>  package/util-linux/0002-build-sys-improve-detection-of-the-isnan-function-in.patch
> 
> Applied to master, thanks. To be honest I'm not sure PATCH 2/2 is the
> most correct solution, but it's good enough. Could you submit it
> upstream?

Patch 2/2 was accepted upstream. Quoting the maintainer (Karel Zak):

“Applied, thanks. (It would be possible to use AC_COMPILE_IFELSE() monster,
but if AC_CHECK_LIB() is good enough than it's probably better.)”

Carlos Santos (Casantos) - DATACOM, P&D
“Something must be done. This is something. Therefore we must do it.”
(from the BBC series “Yes, Prime Minister”, “Power to the people”)