* configure.ac: Check for glibc support for gnu_indirect_function

	support with static linking, setting automake conditional
	IFUNC_STATIC.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

	* testsuite/Makefile.am (ifuncmain1static, ifuncmain2static)
	(ifuncmain4static, ifuncmain5static, ifuncmain7static): Add check
	for IFUNC_STATIC.
	* testsuite/Makefile.in: Regenerate.

1 files changed, 141 insertions, 12 deletions

diff --git a/gold/configure b/gold/configure
index b882223..e0a91f8 100755
--- a/gold/configure
+++ b/gold/configure
@@ -602,6 +602,8 @@ LFS_CFLAGS
 WARN_CXXFLAGS
 NO_WERROR
 WARN_CFLAGS
+IFUNC_STATIC_FALSE
+IFUNC_STATIC_TRUE
 IFUNC_FALSE
 IFUNC_TRUE
 RANDOM_SEED_CFLAGS
@@ -671,6 +673,7 @@ CPPFLAGS
 LDFLAGS
 CFLAGS
 CC
+NM
 TARGETOBJS
 DEFAULT_TARGET_X86_64_FALSE
 DEFAULT_TARGET_X86_64_TRUE
@@ -3526,6 +3529,99 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}nm", so it can be a program name with args.
+set dummy ${ac_tool_prefix}nm; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_NM+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$NM"; then
+  ac_cv_prog_NM="$NM" # Let the user override the test.
+else
+as_save_IFS=$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_NM="${ac_tool_prefix}nm"
+    $as_echo "$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
+NM=$ac_cv_prog_NM
+if test -n "$NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NM" >&5
+$as_echo "$NM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_NM"; then
+  ac_ct_NM=$NM
+  # Extract the first word of "nm", so it can be a program name with args.
+set dummy nm; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if test "${ac_cv_prog_ac_ct_NM+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_NM"; then
+  ac_cv_prog_ac_ct_NM="$ac_ct_NM" # Let the user override the test.
+else
+as_save_IFS=$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_NM="nm"
+    $as_echo "$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_NM=$ac_cv_prog_ac_ct_NM
+if test -n "$ac_ct_NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NM" >&5
+$as_echo "$ac_ct_NM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_NM" = x; then
+    NM=""
+  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
+    NM=$ac_ct_NM
+  fi
+else
+  NM="$ac_cv_prog_NM"
+fi
+
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -6381,12 +6477,14 @@ if test "$gold_cv_c_random_seed" = "yes"; then
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for glibc >= 2.11" >&5
-$as_echo_n "checking for glibc >= 2.11... " >&6; }
-if test "${gold_cv_lib_glibc2_11+set}" = set; then :
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for glibc ifunc support" >&5
+$as_echo_n "checking for glibc ifunc support... " >&6; }
+if test "${gold_cv_lib_glibc_ifunc+set}" = set; then :
   $as_echo_n "(cached) " >&6
 else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+  save_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -static"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #include <features.h>
@@ -6395,20 +6493,39 @@ error
 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
 error
 #endif
-__asm__(".type foo, %gnu_indirect_function");
+void func (void) { }
+void invoke (void);
+__asm__(".type invoke, %gnu_indirect_function");
+typedef void (*funcptr) (void);
+funcptr dispatch (void) __asm__ ("invoke");
+funcptr dispatch (void) { return &func; }
+int
+main ()
+{
+invoke();
+  ;
+  return 0;
+}
 
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  gold_cv_lib_glibc2_11=yes
+if ac_fn_c_try_link "$LINENO"; then :
+
+if ${NM} conftest$EXEEXT | grep "__rela\?_iplt_start" >/dev/null 2>&1; then
+  gold_cv_lib_glibc_ifunc=both
 else
-  gold_cv_lib_glibc2_11=no
+  gold_cv_lib_glibc_ifunc=dyn
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else
+  gold_cv_lib_glibc_ifunc=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LDFLAGS="$save_LDFLAGS"
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gold_cv_lib_glibc2_11" >&5
-$as_echo "$gold_cv_lib_glibc2_11" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gold_cv_lib_glibc_ifunc" >&5
+$as_echo "$gold_cv_lib_glibc_ifunc" >&6; }
 
- if test "$gold_cv_lib_glibc2_11" = "yes"; then
+ if test "$gold_cv_lib_glibc_ifunc" != "no"; then
   IFUNC_TRUE=
   IFUNC_FALSE='#'
 else
@@ -6416,6 +6533,14 @@ else
   IFUNC_FALSE=
 fi
 
+ if test "$gold_cv_lib_glibc_ifunc" = "both"; then
+  IFUNC_STATIC_TRUE=
+  IFUNC_STATIC_FALSE='#'
+else
+  IFUNC_STATIC_TRUE='#'
+  IFUNC_STATIC_FALSE=
+fi
+
 
 
 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
@@ -7353,6 +7478,10 @@ if test -z "${IFUNC_TRUE}" && test -z "${IFUNC_FALSE}"; then
   as_fn_error "conditional \"IFUNC\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${IFUNC_STATIC_TRUE}" && test -z "${IFUNC_STATIC_FALSE}"; then
+  as_fn_error "conditional \"IFUNC_STATIC\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${HAVE_ZLIB_TRUE}" && test -z "${HAVE_ZLIB_FALSE}"; then
   as_fn_error "conditional \"HAVE_ZLIB\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5