[PATCH] build: Ensure mandatory compiler/linker flags
sebastian.huber at embedded-brains.de
Mon Jul 13 05:05:27 UTC 2020
On 13/07/2020 02:09, Chris Johns wrote:
> On 8/7/20 9:37 pm, Sebastian Huber wrote:
>> On 08/07/2020 13:34, Chris Johns wrote:
>>> Are these flags needed for all BSPs?
>> Yes, these flags are needed to build and use libbsd.
> Why not define them for all BSPs
In the new build system they are the default.
> and for all applications?
I don't think we should mandate any optimization flags for applications.
These flags affect the code generation.
> What is special about libbsd that it needs these flags over any other type of
libbsd needs these flags since FreeBSD was not designed as a static
library. In addition, the porting to RTEMS is less intrusive and labour
intensive using these flags.
>>> If so why add to here ...
>> These are optimization flags. I thought the consensus was to export only ABI
>> relevant flags in the new build system.
> In CFLAGS yes. Pkgconfig files (.pc) support variables and I had always thought
> we define a number of RTEMS specific variables and these hold various flags or
> commands needed to handle other things, for example the options to mkimage. A
> user could then test for a variable and if present know this BSP does or has
> extra "what ever".
You mean some sort of recommended optimization flags? We should really
define what the pkg-config files should export so that I can implement
this in the new build system.
Sebastian Huber, embedded brains GmbH
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