[glibc] Ignore undefined symbols for -mtls-dialect=gnu2

[glibc] Ignore undefined symbols for -mtls-dialect=gnu2

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=968b0ca9440040a2b31248a572891f0e55c1ab10

commit 968b0ca9440040a2b31248a572891f0e55c1ab10
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Tue Mar 12 13:21:18 2024 -0300

    Ignore undefined symbols for -mtls-dialect=gnu2
    
    So it does not fail for arm config that defaults to -mtp=soft (which
    issues a call to __aeabi_read_tp).
    Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

Diff:
---
 configure    | 2 +-
 configure.ac | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 59ff1e415d..117b48a421 100755
--- a/configure
+++ b/configure
@@ -7020,7 +7020,7 @@ void foo (void)
 }
 EOF
 if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -fPIC -mtls-dialect=gnu2 -nostdlib -nostartfiles
-		   conftest.c -o conftest 1>&5'
+		   -shared conftest.c -o conftest 1>&5'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
diff --git a/configure.ac b/configure.ac
index 65799e5685..19b88a47a5 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])
+		   -shared conftest.c -o conftest 1>&AS_MESSAGE_LOG_FD])
 then
   libc_cv_mtls_dialect_gnu2=yes
 else