On Mon, Jan 4, 2016 at 12:58 PM, Sebastian Huber < sebastian.hu...@embedded-brains.de> wrote:
> > > ----- Am 4. Jan 2016 um 18:01 schrieb Joel Sherrill j...@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. > Thanks. I trusted you that it was an improvement.. Just didn't know how. :) The small data area can be a pain. On the MIPS, there is a GCC flag to control the maximum size of a data item allowed to be placed in it.
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