[PATCH 2/2] linkers: Fix for targets with a small-data area
sebastian.huber at embedded-brains.de
Mon Jan 4 18:58:17 UTC 2016
----- Am 4. Jan 2016 um 18:01 schrieb Joel Sherrill joel at rtems.org:
> What exactly does this fix and how does it fix it?
I will add this to the commit message:
On certain targets (e.g. PowerPC) global data below a certain threshold (e.g. 8 bytes) may resided in a special memory area, the small-data area. This allows more efficient load/store operations. Placing such data into the wrong section (e.g. .rodata) leads to relocation errors during link-time. See test program libtests/dl02 in the RTEMS testsuite. Using an array of unspecified size prevents that the compiler assumes that a certain variable is in the small-data area.
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