[Bug ld/25110] FAIL: --gc-sections with __start_SECTIONNAME

[dave.anglin at bell dot net]

https://sourceware.org/bugzilla/show_bug.cgi?id=25110

--- Comment #2 from dave.anglin at bell dot net ---
On 2019-10-15 10:23 p.m., amodra at gmail dot com wrote:
> Works for me with hppa-linux-gcc (GCC) 8.1.1 20180502
It's probably because I recently changed the optimization of indirect calls in
gcc-9 and gcc-10.  Gcc
no longer converts indirect calls to an inline version of $$dyncall if
$$dyncall can be reached with a
pc-relative or "ble" branch.  Only the long PIC branch to $$dyncall is now
optimized into inline
versions of $$dyncall.

The reason is $$dyncall is slightly shorter and the inline sequences got
slightly longer in order to
load the branch target before the new PIC register value.

The above changes are preliminary to fixing a glibc race in lazy binding.

Final executables always need to be linked against the millicode library on
hppa to provide $$dyncall
and various arithmetic operations that are implemented in assembly.  Seems we
have lost that in test.

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