re PR driver/65444 (-z bndplt isn't passed to linker for -mmpx when building dynamic objects)

gcc/
	PR driver/65444
	* config/i386/linux-common.h (MPX_SPEC): New.
	(CHKP_SPEC): Add MPX_SPEC.
	* doc/invoke.texi (-fcheck-pointer-boudns): Document
	possible issues with '-z bndplt' support in linker.

libmpx/

	PR driver/65444
	* configure.ac: Add check for '-z bndplt' support
	by linker. Add link_mpx output variable.
	* libmpx.spec.in (link_mpx): New.
	* configure: Regenerate.

From-SVN: r221831

4 files changed, 44 insertions, 3 deletions

diff --git a/libmpx/ChangeLog b/libmpx/ChangeLog
index 35bdeab..6b05278 100644
--- a/libmpx/ChangeLog
+++ b/libmpx/ChangeLog
@@ -1,3 +1,11 @@
+2015-04-02  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	PR driver/65444
+	* configure.ac: Add check for '-z bndplt' support
+	by linker. Add link_mpx output variable.
+	* libmpx.spec.in (link_mpx): New.
+	* configure: Regenerate.
+
 2015-03-12  Ilya Enkovich  <ilya.enkovich@intel.com>
 
 	PR other/65384
diff --git a/libmpx/configure b/libmpx/configure
index 3bbb54c..aeaa483 100644
--- a/libmpx/configure
+++ b/libmpx/configure
@@ -670,6 +670,7 @@ am__isrc
 INSTALL_DATA
 INSTALL_SCRIPT
 INSTALL_PROGRAM
+link_mpx
 link_libmpx
 LIBMPX_SUPPORTED_FALSE
 LIBMPX_SUPPORTED_TRUE
@@ -2523,6 +2524,25 @@ fi
 
 
 link_libmpx="-lpthread"
+link_mpx=""
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ld accepts -z bndplt" >&5
+$as_echo_n "checking whether ld accepts -z bndplt... " >&6; }
+echo "int main() {};" > conftest.c
+if { ac_try='${CC} ${CFLAGS} -Wl,-z,bndplt -o conftest conftest.c 1>&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    link_mpx="$link_mpx -z bndplt"
+else
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
 
 
 am__api_version='1.11'
@@ -11648,7 +11668,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11651 "configure"
+#line 11671 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11754,7 +11774,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11757 "configure"
+#line 11777 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
diff --git a/libmpx/configure.ac b/libmpx/configure.ac
index fe0d3f2..3f8b50f 100644
--- a/libmpx/configure.ac
+++ b/libmpx/configure.ac
@@ -40,7 +40,18 @@ AC_MSG_RESULT($LIBMPX_SUPPORTED)
 AM_CONDITIONAL(LIBMPX_SUPPORTED, [test "x$LIBMPX_SUPPORTED" = "xyes"])
 
 link_libmpx="-lpthread"
+link_mpx=""
+AC_MSG_CHECKING([whether ld accepts -z bndplt])
+echo "int main() {};" > conftest.c
+if AC_TRY_COMMAND([${CC} ${CFLAGS} -Wl,-z,bndplt -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
+then
+    AC_MSG_RESULT([yes])
+    link_mpx="$link_mpx -z bndplt"
+else
+    AC_MSG_RESULT([no])
+fi
 AC_SUBST(link_libmpx)
+AC_SUBST(link_mpx)
 
 AM_INIT_AUTOMAKE(foreign no-dist no-dependencies)
 AM_ENABLE_MULTILIB(, ..)
diff --git a/libmpx/libmpx.spec.in b/libmpx/libmpx.spec.in
index a265e28..34d0bdf 100644
--- a/libmpx/libmpx.spec.in
+++ b/libmpx/libmpx.spec.in
@@ -1,3 +1,5 @@
 # This spec file is read by gcc when linking.  It is used to specify the
-# standard libraries we need in order to link with libcilkrts.
+# standard libraries we need in order to link with libmpx.
 *link_libmpx: @link_libmpx@
+
+*link_mpx: @link_mpx@