# This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
 # Local configure fragment for sysdeps/s390/s390-64.

# Bypass result of runtime configure check for known linker versions as
# e.g. crt-files or libc.so might not be available in bootstrapping
# environments.
case $($LD --version) in
  "GNU gold"*)
    # As of 2023-08-07, gold does not support static PIE due to
    # Bug 22221 - add --no-dynamic-linker option
    # https://sourceware.org/bugzilla/show_bug.cgi?id=22221
    libc_cv_s390x_staticpie_req_version=no
    ;;
  "LLD"*)
    # As of 2023-08-07, there is no lld which supports s390x.
    libc_cv_s390x_staticpie_req_version=no
    ;;
  *)
    # The required binutils patches are available with bintuils 2.39
    libc_cv_s390x_staticpie_req_version=yes
    # Skip AC_CHECK_PROGS and just use the result from main configure.ac.
    libc_cv_s390x_staticpie_req_LD=$LD
    for ac_prog in $LD
do
  # Extract the first word of "$ac_prog", so it can be a program name with args.
set dummy $ac_prog; ac_word=$2
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
printf %s "checking for $ac_word... " >&6; }
if test ${ac_cv_prog_libc_cv_s390x_staticpie_req_LD+y}
then :
  printf %s "(cached) " >&6
else $as_nop
  if test -n "$libc_cv_s390x_staticpie_req_LD"; then
  ac_cv_prog_libc_cv_s390x_staticpie_req_LD="$libc_cv_s390x_staticpie_req_LD" # Let the user override the test.
else
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
  IFS=$as_save_IFS
  case $as_dir in #(((
    '') as_dir=./ ;;
    */) ;;
    *) as_dir=$as_dir/ ;;
  esac
    for ac_exec_ext in '' $ac_executable_extensions; do
  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
    ac_cv_prog_libc_cv_s390x_staticpie_req_LD="$ac_prog"
    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
    break 2
  fi
done
  done
IFS=$as_save_IFS

fi
fi
libc_cv_s390x_staticpie_req_LD=$ac_cv_prog_libc_cv_s390x_staticpie_req_LD
if test -n "$libc_cv_s390x_staticpie_req_LD"; then
  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_s390x_staticpie_req_LD" >&5
printf "%s\n" "$libc_cv_s390x_staticpie_req_LD" >&6; }
else
  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
printf "%s\n" "no" >&6; }
fi


  test -n "$libc_cv_s390x_staticpie_req_LD" && break
done

if test -z "$libc_cv_s390x_staticpie_req_LD"; then
  ac_verc_fail=yes
else
  # Found it, now check the version.
  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking version of $libc_cv_s390x_staticpie_req_LD" >&5
printf %s "checking version of $libc_cv_s390x_staticpie_req_LD... " >&6; }
  ac_prog_version=`$libc_cv_s390x_staticpie_req_LD --version 2>&1 | sed -n 's/^.*GNU ld.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
  case $ac_prog_version in
    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
    2.1[0-9][0-9]*|2.39*|2.[4-9][0-9]*|[3-9].*|[1-9][0-9]*)
       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;

  esac
  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
printf "%s\n" "$ac_prog_version" >&6; }
fi
if test $ac_verc_fail = yes; then
  libc_cv_s390x_staticpie_req_version=no
fi

    ;;
esac
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for s390-specific static PIE requirements (version check)" >&5
printf %s "checking for s390-specific static PIE requirements (version check)... " >&6; }
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_s390x_staticpie_req_version" >&5
printf "%s\n" "$libc_cv_s390x_staticpie_req_version" >&6; }

# Minimal checking for static PIE support in ld.
# Compare to ld testcase/bugzilla:
# <binutils-source>/ld/testsuite/ld-elf/pr22263-1.rd
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for s390-specific static PIE requirements (runtime check)" >&5
printf %s "checking for s390-specific static PIE requirements (runtime check)... " >&6; }
if { as_var=\
libc_cv_s390x_staticpie_req_runtime; eval test \${$as_var+y}; }
then :
  printf %s "(cached) " >&6
else $as_nop
    cat > conftest1.c <<EOF
__thread int * foo;

void
bar (void)
{
  *foo = 1;
}
EOF
  cat > conftest2.c <<EOF
extern __thread int *foo;
extern void bar (void);
static int x;

int
main ()
{
  foo = &x;
  return 0;
}
EOF
  libc_cv_s390x_staticpie_req_runtime=no
  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -fPIE -c conftest1.c -o conftest1.o'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; } \
     && { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -fPIE -c conftest2.c -o conftest2.o'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; } \
     && { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -pie -o conftest conftest1.o conftest2.o'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; } \
     && { ac_try='! LC_ALL=C $READELF -Wr conftest | grep R_390_TLS_TPOFF'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; }
  then
    libc_cv_s390x_staticpie_req_runtime=yes
  fi
  rm -rf conftest.*
fi
eval ac_res=\$\
libc_cv_s390x_staticpie_req_runtime
	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
printf "%s\n" "$ac_res" >&6; }

if test $libc_cv_s390x_staticpie_req_runtime = yes \
   || test $libc_cv_s390x_staticpie_req_version = yes; then
   # Static PIE is supported only on 64bit.
   # Ensure you also have those patches for:
   # - binutils (ld)
   #   - "[PR ld/22263] s390: Avoid dynamic TLS relocs in PIE"
   #     https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=26b1426577b5dcb32d149c64cca3e603b81948a9
   #     (Tested by configure check above)
   #     Otherwise there will be a R_390_TLS_TPOFF relocation, which fails to
   #     be processed in _dl_relocate_static_pie() as static TLS map is not setup.
   #   - "s390: Add DT_JMPREL pointing to .rela.[i]plt with static-pie"
   #     https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=d942d8db12adf4c9e5c7d9ed6496a779ece7149e
   #     (We can't test it in configure as we are not able to link a static PIE
   #     executable if the system glibc lacks static PIE support)
   #     Otherwise there won't be DT_JMPREL, DT_PLTRELA, DT_PLTRELASZ entries
   #     and the IFUNC symbols are not processed, which leads to crashes.
   #
   # - kernel (the mentioned links to the commits belong to 5.19 merge window):
   #   - "s390/mmap: increase stack/mmap gap to 128MB"
   #     https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=f2f47d0ef72c30622e62471903ea19446ea79ee2
   #   - "s390/vdso: move vdso mapping to its own function"
   #     https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=57761da4dc5cd60bed2c81ba0edb7495c3c740b8
   #   - "s390/vdso: map vdso above stack"
   #     https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=9e37a2e8546f9e48ea76c839116fa5174d14e033
   #   - "s390/vdso: add vdso randomization"
   #     https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=41cd81abafdc4e58a93fcb677712a76885e3ca25
   #   (We can't test the kernel of the target system)
   #   Otherwise if /proc/sys/kernel/randomize_va_space is turned off (0),
   #   static PIE executables like ldconfig will crash.  While startup sbrk is
   #   used to enlarge the HEAP.  Unfortunately the underlying brk syscall fails
   #   as there is not enough space after the HEAP.  Then the address of the TLS
   #   image is invalid and the following memcpy in __libc_setup_tls() leads
   #   to a segfault.
   #   If /proc/sys/kernel/randomize_va_space is activated (default: 2), there
   #   is enough space after HEAP.
   #
   # - glibc
   #   - "Linux: Define MMAP_CALL_INTERNAL"
   #     https://sourceware.org/git/?p=glibc.git;a=commit;h=c1b68685d438373efe64e5f076f4215723004dfb
   #   - "i386: Remove OPTIMIZE_FOR_GCC_5 from Linux libc-do-syscall.S"
   #     https://sourceware.org/git/?p=glibc.git;a=commit;h=6e5c7a1e262961adb52443ab91bd2c9b72316402
   #   - "i386: Honor I386_USE_SYSENTER for 6-argument Linux system calls"
   #     https://sourceware.org/git/?p=glibc.git;a=commit;h=60f0f2130d30cfd008ca39743027f1e200592dff
   #   - "ia64: Always define IA64_USE_NEW_STUB as a flag macro"
   #     https://sourceware.org/git/?p=glibc.git;a=commit;h=18bd9c3d3b1b6a9182698c85354578d1d58e9d64
   #   - "Linux: Implement a useful version of _startup_fatal"
   #     https://sourceware.org/git/?p=glibc.git;a=commit;h=a2a6bce7d7e52c1c34369a7da62c501cc350bc31
   #   - "Linux: Introduce __brk_call for invoking the brk system call"
   #     https://sourceware.org/git/?p=glibc.git;a=commit;h=b57ab258c1140bc45464b4b9908713e3e0ee35aa
   #   - "csu: Implement and use _dl_early_allocate during static startup"
   #     https://sourceware.org/git/?p=glibc.git;a=commit;h=f787e138aa0bf677bf74fa2a08595c446292f3d7
   #   The mentioned patch series by Florian Weimer avoids the mentioned failing
   #   sbrk syscall by falling back to mmap.
   printf "%s\n" "#define SUPPORT_STATIC_PIE 1" >>confdefs.h

fi