elf: Add ELF_DYNAMIC_AFTER_RELOC to rewrite PLT

[platform/upstream/glibc.git] / sysdeps / x86_64 / configure

diff --git a/sysdeps/x86_64/configure b/sysdeps/x86_64/configure
index b4a80b8..418cc4a 100755 (executable)
--- a/sysdeps/x86_64/configure
+++ b/sysdeps/x86_64/configure
@@ -25,6 +25,41 @@ printf "%s\n" "$libc_cv_cc_mprefer_vector_width" >&6; }
 config_vars="$config_vars
 config-cflags-mprefer-vector-width = $libc_cv_cc_mprefer_vector_width"
 
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for linker that supports -z mark-plt" >&5
+printf %s "checking for linker that supports -z mark-plt... " >&6; }
+libc_linker_feature=no
+cat > conftest.c <<EOF
+int _start (void) { return 42; }
+EOF
+if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
+                 -Wl,-z,mark-plt -nostdlib -nostartfiles
+                 -fPIC -shared -o conftest.so conftest.c
+                 1>&5'
+  { { eval echo "\"\$as_me\":${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
+  if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -Wl,-z,mark-plt -nostdlib \
+      -nostartfiles -fPIC -shared -o conftest.so conftest.c 2>&1 \
+      | grep "warning: -z mark-plt ignored" > /dev/null 2>&1; then
+    true
+  else
+    libc_linker_feature=yes
+  fi
+fi
+rm -f conftest*
+if test $libc_linker_feature = yes; then
+  libc_cv_z_mark_plt=yes
+else
+  libc_cv_z_mark_plt=no
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_linker_feature" >&5
+printf "%s\n" "$libc_linker_feature" >&6; }
+config_vars="$config_vars
+have-z-mark-plt = $libc_cv_z_mark_plt"
+
 if test x"$build_mathvec" = xnotset; then
   build_mathvec=yes
 fi