[Bug ld/21294] New: Binary size regression on PPC embedded (COMMONPAGESIZE 64k)

[floessie.mail at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21294

            Bug ID: 21294
           Summary: Binary size regression on PPC embedded (COMMONPAGESIZE
                    64k)
           Product: binutils
           Version: 2.27
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: floessie.mail at gmail dot com
  Target Milestone: ---

Hello,

Since updating our toolchains for PPC 405, e300c3, and e500v2 we experience a
massive size increase for small binaries. Our 405 target has very small
storage, and as the rootfs contains a lot of small binaries, we can't supply
images linked with binutils 2.27 or 2.28 anymore.

I filed a bug over at crosstool-ng [1] to get some help, and Alexey Neyman was
kind enough to give me a hint to COMMONPAGESIZE. Doing some research, I found
out that it was raised from 4k to 64k in 2014 [2]. You discussed about the
impact on embedded, but it wasn't considered as an obstacle. Maybe that should
be reconsidered.

Is it possible to treat embedded, size constrained targets differently than
servers? There's a special 4k COMMONPAGESIZE for __QNXTARGET__. Or would it be
possible to add a configure option for this? Or is there already another
mechanism to alter COMMONPAGESIZE?

Kind regards,
Flössie

[1] https://github.com/crosstool-ng/crosstool-ng/issues/656
[2] https://sourceware.org/ml/binutils/2014-12/msg00165.html

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