GCC: Check if AR works with --plugin and rc

AR from older binutils doesn't work with --plugin and rc: [hjl@gnu-cfl-2 bin]$ touch foo.c [hjl@gnu-cfl-2 bin]$ ar --plugin /usr/libexec/gcc/x86_64-redhat-linux/10/liblto_plugin.so rc libfoo.a foo.c [hjl@gnu-cfl-2 bin]$ ./ar --plugin /usr/libexec/gcc/x86_64-redhat-linux/10/liblto_plugin.so rc libfoo.a foo.c ./ar: no operation specified [hjl@gnu-cfl-2 bin]$ ./ar --version GNU ar (Linux/GNU Binutils) 2.29.51.0.1.20180112 Copyright (C) 2018 Free Software Foundation, Inc. This program is free software; you may redistribute it under the terms of the GNU General Public License version 3 or (at your option) any later version. This program has absolutely no warranty. [hjl@gnu-cfl-2 bin]$ Check if AR works with --plugin and rc before passing --plugin to AR and RANLIB. PR ld/27173 * configure: Regenerated. * libtool.m4 (_LT_CMD_OLD_ARCHIVE): Check if AR works with --plugin and rc before enabling --plugin. config/ PR ld/27173 * gcc-plugin.m4 (GCC_PLUGIN_OPTION): Check if AR works with --plugin and rc before enabling --plugin. libiberty/ PR ld/27173 * configure: Regenerated. zlib/ PR ld/27173 * configure: Regenerated.
2021-01-11 16:26:39 -08:00 · 2021-01-11 16:26:39 -08:00 · 88d86e5970
parent d8d5dac0fe
commit 88d86e5970
19 changed files with 299 additions and 49 deletions
--- a/config/gcc-plugin.m4
+++ b/config/gcc-plugin.m4
@ -132,6 +132,18 @@ for plugin in $plugin_names; do
    break
  fi
 done
+dnl Check if ${AR} $plugin_option rc works.
+AC_CHECK_TOOL(AR, ar)
+if test "${AR}" = "" ; then
+  AC_MSG_ERROR([Required archive tool 'ar' not found on PATH.])
+fi
+touch conftest.c
+${AR} $plugin_option rc conftest.a conftest.c
+if test "$?" != 0; then
+  AC_MSG_WARN([Failed: $AR $plugin_option rc])
+  plugin_option=
+fi
+rm -f conftest.*
 if test -n "$plugin_option"; then
  $1="$plugin_option"
  AC_MSG_RESULT($plugin_option)
--- a/103
+++ b/103
@ -10024,6 +10024,109 @@ for plugin in $plugin_names; do
    break
  fi
 done
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ar; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AR"; then
+  ac_cv_prog_AR="$AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    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_AR="${ac_tool_prefix}ar"
+    $as_echo "$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
+AR=$ac_cv_prog_AR
+if test -n "$AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+$as_echo "$AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_AR"; then
+  ac_ct_AR=$AR
+  # Extract the first word of "ar", so it can be a program name with args.
+set dummy ar; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_AR"; then
+  ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    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_ac_ct_AR="ar"
+    $as_echo "$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
+ac_ct_AR=$ac_cv_prog_ac_ct_AR
+if test -n "$ac_ct_AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+$as_echo "$ac_ct_AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_AR" = x; then
+    AR=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    AR=$ac_ct_AR
+  fi
+else
+  AR="$ac_cv_prog_AR"
+fi
+
+if test "${AR}" = "" ; then
+  as_fn_error $? "Required archive tool 'ar' not found on PATH." "$LINENO" 5
+fi
+touch conftest.c
+${AR} $plugin_option rc conftest.a conftest.c
+if test "$?" != 0; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+  plugin_option=
+fi
+rm -f conftest.*
 if test -n "$plugin_option"; then
  PLUGIN_OPTION="$plugin_option"
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $plugin_option" >&5
--- a/libtool.m4
+++ b/libtool.m4
@ -1340,7 +1340,14 @@ AC_CHECK_TOOL(AR, ar, false)
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      AC_MSG_WARN([Failed: $AR $plugin_option rc])
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
--- a/newlib/configure
+++ b/newlib/configure
@ -6734,7 +6734,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11841,7 +11849,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11844 "configure"
+#line 11852 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11947,7 +11955,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11950 "configure"
+#line 11958 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/iconvdata/configure
+++ b/newlib/iconvdata/configure
@ -6309,7 +6309,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11416,7 +11424,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11419 "configure"
+#line 11427 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11522,7 +11530,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11525 "configure"
+#line 11533 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/configure
+++ b/newlib/libc/configure
@ -6433,7 +6433,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11540,7 +11548,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11543 "configure"
+#line 11551 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11646,7 +11654,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11649 "configure"
+#line 11657 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/machine/configure
+++ b/newlib/libc/machine/configure
@ -6371,7 +6371,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11478,7 +11486,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11481 "configure"
+#line 11489 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11584,7 +11592,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11587 "configure"
+#line 11595 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/machine/i386/configure
+++ b/newlib/libc/machine/i386/configure
@ -6311,7 +6311,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11418,7 +11426,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11421 "configure"
+#line 11429 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11524,7 +11532,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11527 "configure"
+#line 11535 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/sys/configure
+++ b/newlib/libc/sys/configure
@ -6341,7 +6341,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11448,7 +11456,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11451 "configure"
+#line 11459 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11554,7 +11562,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11557 "configure"
+#line 11565 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/sys/linux/configure
+++ b/newlib/libc/sys/linux/configure
@ -6357,7 +6357,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11464,7 +11472,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11467 "configure"
+#line 11475 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11570,7 +11578,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11573 "configure"
+#line 11581 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/sys/linux/linuxthreads/configure
+++ b/newlib/libc/sys/linux/linuxthreads/configure
@ -6355,7 +6355,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11462,7 +11470,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11465 "configure"
+#line 11473 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11568,7 +11576,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11571 "configure"
+#line 11579 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/sys/linux/linuxthreads/machine/configure
+++ b/newlib/libc/sys/linux/linuxthreads/machine/configure
@ -6313,7 +6313,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11420,7 +11428,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11423 "configure"
+#line 11431 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11526,7 +11534,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11529 "configure"
+#line 11537 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/sys/linux/linuxthreads/machine/i386/configure
+++ b/newlib/libc/sys/linux/linuxthreads/machine/i386/configure
@ -6351,7 +6351,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11458,7 +11466,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11461 "configure"
+#line 11469 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11564,7 +11572,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11567 "configure"
+#line 11575 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/sys/linux/machine/configure
+++ b/newlib/libc/sys/linux/machine/configure
@ -6314,7 +6314,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11421,7 +11429,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11424 "configure"
+#line 11432 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11527,7 +11535,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11530 "configure"
+#line 11538 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libc/sys/linux/machine/i386/configure
+++ b/newlib/libc/sys/linux/machine/i386/configure
@ -6351,7 +6351,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11458,7 +11466,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11461 "configure"
+#line 11469 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11564,7 +11572,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11567 "configure"
+#line 11575 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libm/configure
+++ b/newlib/libm/configure
@ -6373,7 +6373,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11480,7 +11488,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11483 "configure"
+#line 11491 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11586,7 +11594,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11589 "configure"
+#line 11597 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libm/machine/configure
+++ b/newlib/libm/machine/configure
@ -6324,7 +6324,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11431,7 +11439,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11434 "configure"
+#line 11442 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11537,7 +11545,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11540 "configure"
+#line 11548 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libm/machine/i386/configure
+++ b/newlib/libm/machine/i386/configure
@ -6309,7 +6309,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11416,7 +11424,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11419 "configure"
+#line 11427 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11522,7 +11530,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11525 "configure"
+#line 11533 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
--- a/newlib/libm/machine/x86_64/configure
+++ b/newlib/libm/machine/x86_64/configure
@ -6309,7 +6309,15 @@ fi
 test -z "$AR" && AR=ar
 if test -n "$plugin_option"; then
  if $AR --help 2>&1 | grep -q "\--plugin"; then
-    AR="$AR $plugin_option"
+    touch conftest.c
+    $AR $plugin_option rc conftest.a conftest.c
+    if test "$?" != 0; then
+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Failed: $AR $plugin_option rc" >&5
+$as_echo "$as_me: WARNING: Failed: $AR $plugin_option rc" >&2;}
+    else
+      AR="$AR $plugin_option"
+    fi
+    rm -f conftest.*
  fi
 fi
 test -z "$AR_FLAGS" && AR_FLAGS=cru
@ -11416,7 +11424,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11419 "configure"
+#line 11427 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H
@ -11522,7 +11530,7 @@ else
  lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
  lt_status=$lt_dlunknown
  cat > conftest.$ac_ext <<_LT_EOF
-#line 11525 "configure"
+#line 11533 "configure"
 #include "confdefs.h"

 #if HAVE_DLFCN_H