Torbjörn SVENSSON <[email protected]> writes:

> On 2026-02-06 11:49, Richard Biener wrote:
>> On Thu, 5 Feb 2026, Torbjorn SVENSSON wrote:
>> 
>>> Hi,
>>>
>>> Gentle ping for below patch.
>> 
>> I think I'm now seeing
>> 
>> +UNRESOLVED: gcc.dg/lto/pr122515 c_lto_pr122515_0.o-c_lto_pr122515.a
>> execute  -f
>> lto=auto -ffat-lto-objects
>> +UNRESOLVED: gcc.dg/lto/pr122515 c_lto_pr122515_0.o-c_lto_pr122515.a link
>> -flto
>> =auto -ffat-lto-objects
>> +FAIL: gcc.dg/lto/pr122515, ar returned 1: /home/rguenther/obj/gcc/gcc-ar:
>> Cannot find plugin 'liblto_plugin.so'
>> 
>> because of this.  This might be a pre-existing issue just exposed, but
>> it's still a bug.
>
> Not sure why my tests did not catch this error.
> Anyway, I've retested with and without my patch and it's clear that the -B 
> argument is missed with my patch.
> I've pushed below patch as obvious to fix the issue for both trunk and 
> release/gcc-15.

FWIW, this is why some soaking time on trunk is best if possible first.

>
> Sorry!
>
> Kind regards,
> Torbjörn
>
>> 
>> Richard.
>> 
>>> Kind regards,
>>> Torbjörn
>>>
>>> On 2026-01-29 13:58, Torbjörn SVENSSON wrote:
>>>> Changes since v1:
>>>>
>>>> - Replaced implementation with the same approach as for gcov in
>>>>     gcc/testsuite/gcc.misc-tests/gcov.exp to properly support out of
>>>>     tree testing.
>>>>
>>>> Ok for trunk and releases/gcc-15?
>>>>
>>>> --
>>>>
>>>> When the the gcc binary is named arm-none-eabi-gcc, the gcc-ar binary
>>>> will be named arm-none-eabi-gcc-ar.  The current approach works fine as
>>>> long as the binary does not contain any prefix, but if it does, the
>>>> gcc-ar binary will not be found.
>>>>
>>>> gcc/testsuite/ChangeLog
>>>>
>>>>   * lib/lto.exp (lto-build-archive): Transform gcc-ar binary name.
>>>>
>>>> Signed-off-by: Torbjörn SVENSSON <[email protected]>
>>>> ---
>>>>    gcc/testsuite/lib/lto.exp | 17 ++++++++++++++---
>>>>    1 file changed, 14 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/gcc/testsuite/lib/lto.exp b/gcc/testsuite/lib/lto.exp
>>>> index c307762abc3..0181a3f4e85 100644
>>>> --- a/gcc/testsuite/lib/lto.exp
>>>> +++ b/gcc/testsuite/lib/lto.exp
>>>> @@ -313,6 +313,7 @@ proc lto-build-archive { testname objlist dest } {
>>>>        global testcase
>>>>        global tool
>>>>        global GCC_UNDER_TEST
>>>> +    global GCC_AR_UNDER_TEST
>>>>    
>>>>        upvar dg-messages-by-file dg-messages-by-file
>>>>    @@ -327,9 +328,19 @@ proc lto-build-archive { testname objlist dest } {
>>>>     }
>>>>        }
>>>>    -    # Hack up the gcc-ar command from $GCC_UNDER_TEST.
>>>> -    set ar_cmd [file dirname [lindex $GCC_UNDER_TEST 0]]
>>>> -    set ar_cmd "$ar_cmd/gcc-ar [lrange $GCC_UNDER_TEST 1 end]"
>>>> +    # For now find gcc-ar in the same directory as $GCC_UNDER_TEST, unless
>>>> +    # GCC_AR_UNDER_TEST is defined.
>>>> +
>>>> +    if ![info exists GCC_AR_UNDER_TEST] {
>>>> +  if { ![is_remote host] && [string match "*/*" [lindex $GCC_UNDER_TEST
>>>> 0]] } {
>>>> +      set ar_cmd [file dirname [lindex $GCC_UNDER_TEST
>>>> 0]]/[gcc-transform-out-of-tree gcc-ar]
>>>> +  } else {
>>>> +      set ar_cmd [gcc-transform-out-of-tree gcc-ar]
>>>> +  }
>>>> +    } else {
>>>> +        set ar_cmd $GCC_AR_UNDER_TEST
>>>> +    }
>>>> +
>>>>        set ar_output [remote_exec host "$ar_cmd rcs $dest $objlist"]
>>>>        set retval [lindex $ar_output 0]
>>>>        set retmsg [lindex $ar_output 1]
>>>
>>>
>>>
>> 
>
>
> gcc/testsuite/ChangeLog:
>
>       * lib/lto.exp (lto-build-archive): Forward extra command line
>       arguments from $GCC_UNDER_TEST to gcc-ar.
>
> Signed-off-by: Torbjörn SVENSSON <[email protected]>
> ---
>  gcc/testsuite/lib/lto.exp | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/gcc/testsuite/lib/lto.exp b/gcc/testsuite/lib/lto.exp
> index 0181a3f4e85..2a7b8b0de93 100644
> --- a/gcc/testsuite/lib/lto.exp
> +++ b/gcc/testsuite/lib/lto.exp
> @@ -337,6 +337,7 @@ proc lto-build-archive { testname objlist dest } {
>       } else {
>           set ar_cmd [gcc-transform-out-of-tree gcc-ar]
>       }
> +     set ar_cmd "$ar_cmd [lrange $GCC_UNDER_TEST 1 end]"
>      } else {
>          set ar_cmd $GCC_AR_UNDER_TEST
>      }

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