NEW BUILD SYSTEM: Cannot build rtems-libbsd
sebastian.huber at embedded-brains.de
Wed Jul 8 06:13:55 UTC 2020
On 08/07/2020 08:10, Niteesh G. S. wrote:
> On Tue, Jul 7, 2020 at 10:42 AM Sebastian Huber
> <sebastian.huber at embedded-brains.de
> <mailto:sebastian.huber at embedded-brains.de>> wrote:
> the problem is that the new build system doesn't export optimization
> flags such as -Wl,--gc-sections. The libbsd build should enable this
> linker option unconditionally.
> Thank you. I got it fixed (temporarily) by modifying rtems.py.
> conf.env.CFLAGS = cflags['cflags'] + ['-ffunction-sections'] +
This instructs the compiler to add data elements and functions into
separate sections. This is necessary so that the linker can carry out
the garbage collection.
> As per Christian suggestions, I tried exporting CFLAGS with these GCC
> flags and then calling ./waf configure but they didn't work.
You have to add -Wl,--gc-sections to the linker flags.
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