Re: Upstreaming OpenRISC with GCC mainline

[Stafford Horne <shorne@gmail.com>]

On Thu, Oct 28, 2021 at 05:15:00PM +0000, Joseph Myers wrote:
> On Thu, 28 Oct 2021, Stafford Horne via Libc-alpha wrote:
> 
> > I was seeing failures there and thought the warnings I was seeing were
> > affecting all architectures.  But now I see the builds are mostly clean.
> > So it's something I'll have to track down.
> 
> The only issue I know of at present with GCC mainline is the testsuite 
> build failures for 32-bit platforms that are addressed by my patch 
> <https://sourceware.org/pipermail/libc-alpha/2021-October/132348.html>.

Thanks, yes I saw that patch.

I am trying to compare builds of multiple architectures.  I do see similar
errors on riscv32.  I am continuing to try looking at other architectures, but
just wanted to note this:

FAIL: compilers-riscv32-linux-gnu-rv32imac-ilp32 glibc riscv32-linux-gnu-rv32imac-ilp32 build

    malloc.c: In function ‘_int_malloc’:
    malloc.c:4226:53: error: ‘nb’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
     4226 |                   set_head (victim, nb | PREV_INUSE |
	  |                                                     ^
    malloc.c:3657:19: note: ‘nb’ was declared here
     3657 |   INTERNAL_SIZE_T nb;               /* normalized request size */
	  |                   ^~

FAIL: compilers-or1k-linux-gnu-soft glibc or1k-linux-gnu-soft build

    malloc.c: In function ‘_int_malloc’:
    malloc.c:4226:53: error: ‘nb’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
     4226 |                   set_head (victim, nb | PREV_INUSE |
	  |                                                     ^
    malloc.c:3657:19: note: ‘nb’ was declared here
     3657 |   INTERNAL_SIZE_T nb;               /* normalized request size */
	  |                   ^~

GCC: mainline   (2021-10-29 308531d148a)
GLIBC: mainline (2021-10-19 46baeb61e1)

Ill try to update GLIBC.

-Stafford