[glibc] LoongArch: Fix static PIE condition for toolchain bootstrapping.

[Yinyu Cai <caiyinyu@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c579293f67f4717054e31b7015418b24b81ca217

commit c579293f67f4717054e31b7015418b24b81ca217
Author: Yang Yujie <yangyujie@loongson.cn>
Date:   Thu Aug 3 16:35:24 2023 +0800

    LoongArch: Fix static PIE condition for toolchain bootstrapping.
    
    This patch allows the static PIE startfile rcrt1.o to be built
    without requiring libgcc_s.so from GCC, which depends on libc
    in the first place.

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

diff --git a/sysdeps/loongarch/configure b/sysdeps/loongarch/configure
index 7f1dabbc37..5843c7cf90 100644
--- a/sysdeps/loongarch/configure
+++ b/sysdeps/loongarch/configure
@@ -55,7 +55,7 @@ EOF
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; } \
-     && { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -shared -fPIC -o conftest2.so conftest2.S'
+     && { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -shared -nostdlib -fPIC -o conftest2.so conftest2.S'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
diff --git a/sysdeps/loongarch/configure.ac b/sysdeps/loongarch/configure.ac
index 39efccfd8f..ba89d8346d 100644
--- a/sysdeps/loongarch/configure.ac
+++ b/sysdeps/loongarch/configure.ac
@@ -42,7 +42,7 @@ EOF
   if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static-pie -nostdlib -fPIE -o conftest1 conftest1.S]) \
      && AC_TRY_COMMAND([LC_ALL=C $READELF -Wr conftest1 | grep -q R_LARCH_RELATIVE]) \
      && ! AC_TRY_COMMAND([LC_ALL=C $READELF -Wl conftest1 | grep -q INTERP]) \
-     && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -shared -fPIC -o conftest2.so conftest2.S]) \
+     && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -shared -nostdlib -fPIC -o conftest2.so conftest2.S]) \
      && AC_TRY_COMMAND([LC_ALL=C $READELF -Wr conftest2.so | grep -q 'R_LARCH_JUMP_SLOT.*external_func'])
   then
     libc_cv_static_pie_on_loongarch=yes