Find readelf with AC_CHECK_TOOL for use in configure tests.

ChangeLog

@@ -1,3 +1,9 @@
+2011-07-09  Roland McGrath  <roland@hack.frob.com>
+
+	* configure.in (READELF): Find it with AC_CHECK_TOOL.
+	Update tests that use readelf to use $READELF instead.
+	* configure: Regenerated.
+
 2011-07-08  Ulrich Drepper  <drepper@gmail.com>
 
 	* malloc/hooks.c (memalign_check): Avoid using checked_request2size

configure

@@ -669,6 +669,7 @@ libc_cv_gcc_static_libgcc
 CXX_SYSINCLUDES
 SYSINCLUDES
 AUTOCONF
+READELF
 SED
 MAKEINFO
 MSGFMT
@@ -5226,6 +5227,99 @@ if test $ac_verc_fail = yes; then
 fi
 
 
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}readelf", so it can be a program name with args.
+set dummy ${ac_tool_prefix}readelf; 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_READELF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$READELF"; then
+  ac_cv_prog_READELF="$READELF" # Let the user override the test.
+else
+as_save_IFS=$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 '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_READELF="${ac_tool_prefix}readelf"
+    $as_echo "$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
+READELF=$ac_cv_prog_READELF
+if test -n "$READELF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $READELF" >&5
+$as_echo "$READELF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_READELF"; then
+  ac_ct_READELF=$READELF
+  # Extract the first word of "readelf", so it can be a program name with args.
+set dummy readelf; 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_READELF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_READELF"; then
+  ac_cv_prog_ac_ct_READELF="$ac_ct_READELF" # Let the user override the test.
+else
+as_save_IFS=$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 '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_ac_ct_READELF="readelf"
+    $as_echo "$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_READELF=$ac_cv_prog_ac_ct_READELF
+if test -n "$ac_ct_READELF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_READELF" >&5
+$as_echo "$ac_ct_READELF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_READELF" = x; then
+    READELF="false"
+  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
+    READELF=$ac_ct_READELF
+  fi
+else
+  READELF="$ac_cv_prog_READELF"
+fi
+
+
 for ac_prog in autoconf
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
@@ -6102,7 +6196,7 @@ EOF
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }
   then
-    if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
+    if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
       libc_cv_initfini_array=yes
     else
       libc_cv_initfini_array=no
@@ -6414,7 +6508,7 @@ EOF
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }
   then
-    if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
+    if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
       libc_cv_z_combreloc=yes
     else
       libc_cv_z_combreloc=no

configure.in

@@ -1046,6 +1046,8 @@ AC_CHECK_PROG_VER(SED, sed, --version,
   [3.0[2-9]*|3.[1-9]*|[4-9]*],
   SED=: aux_missing="$aux_missing sed")
 
+AC_CHECK_TOOL(READELF, readelf, false)
+
 AC_CHECK_PROGS(AUTOCONF, autoconf, no)
 case "x$AUTOCONF" in
 xno|x|x:) AUTOCONF=no ;;
@@ -1469,7 +1471,7 @@ EOF
   if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
 		     -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
   then
-    if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then
+    if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
       libc_cv_initfini_array=yes
     else
       libc_cv_initfini_array=no
@@ -1666,7 +1668,7 @@ dnl cross-platform since the gcc used can be a cross compiler.  Without
 dnl introducing new options this is not easily doable.  Instead use a tool
 dnl which always is cross-platform: readelf.  To detect whether -z combreloc
 dnl look for a section named .rel.dyn.
-    if readelf -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
+    if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
       libc_cv_z_combreloc=yes
     else
       libc_cv_z_combreloc=no