[GDB] Use AC_CHECK_SIZEOF to test for PRFPREGSET_T_BROKEN

Yao Qi qiyaoltc@gmail.com
Tue Sep 27 23:42:00 GMT 2016


On Mon, Sep 26, 2016 at 3:17 PM, Matthew Wahab
<matthew.wahab@foss.arm.com> wrote:
> Hello,
>
> If the GDB configure script finds sys/procfs.h and the prfpregset_t
> type, it checks whether prfpregset_t is usable, setting
> PRFPREGSET_T_BROKEN if so. It does this using AC_TRY_RUN to test the
> value of sizeof(prfregset_t). This doesn't work for cross-compiled
> builds so for those PRFPREGSET_T_BROKEN is always set.
>
> This patch replaces the use of AC_TRY_RUN with a test that uses
> AC_CHECK_SIZEOF to decide whether to set PRFPREGSET_T_BROKEN. This can
> be run for cross-compiled builds.
>
> Tested by cross-compiling for aarch64-none-linux-gnu and recent
> glibc and by building with the logic inverted, to check the conditional was
> correctly executing. Also by building for native x86_64-none-linux-gnu.
>
> Ok for trunk?

Hi Matthew,
Thanks for the follow-up patch.  The patch should be sent gdb-patches@ mailing
list.



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