Re: [PATCH 1/3] Ignore undefined symbols for -mtls-dialect=gnu2

[Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>]

On 05/03/24 17:07, H.J. Lu wrote:
> On Thu, Feb 29, 2024 at 11:46 AM Adhemerval Zanella
> <adhemerval.zanella@linaro.org> wrote:
>>
>> So it is not fail for arm config that defaults to -mtp=soft (which
>> issues a call to __aeabi_read_tp).
>> ---
>>  configure    | 2 +-
>>  configure.ac | 2 +-
>>  2 files changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/configure b/configure
>> index 59ff1e415d..ab8a10ed92 100755
>> --- a/configure
>> +++ b/configure
>> @@ -7020,7 +7020,7 @@ void foo (void)
>>  }
>>  EOF
>>  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -fPIC -mtls-dialect=gnu2 -nostdlib -nostartfiles
>> -                  conftest.c -o conftest 1>&5'
>> +                  -Wl,--unresolved-symbols=ignore-all conftest.c -o conftest 1>&5'
>>    { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
>>    (eval $ac_try) 2>&5
>>    ac_status=$?
>> diff --git a/configure.ac b/configure.ac
>> index 65799e5685..4bb9aeef95 100644
>> --- a/configure.ac
>> +++ b/configure.ac
>> @@ -1297,7 +1297,7 @@ void foo (void)
>>  }
>>  EOF
>>  if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -fPIC -mtls-dialect=gnu2 -nostdlib -nostartfiles
>> -                  conftest.c -o conftest 1>&AS_MESSAGE_LOG_FD])
>> +                  -Wl,--unresolved-symbols=ignore-all conftest.c -o conftest 1>&AS_MESSAGE_LOG_FD])
>>  then
> 
> Can we use -shared instead?

It works as well, I don't have a strong preference.

> 
>>    libc_cv_mtls_dialect_gnu2=yes
>>  else
>> --
>> 2.34.1
>>
> 
>