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Fix failure in unexec with hardened Linux kernel and XATTR_PAX_FLAGS=y.
https://bugs.gentoo.org/456970
https://bugs.gentoo.org/497498
--- emacs-24.3-orig/configure.ac
+++ emacs-24.3/configure.ac
@@ -790,6 +790,18 @@
fi
fi
+AC_PATH_PROG(SETFATTR, setfattr)
+if test "X$SETFATTR" != X; then
+ AC_MSG_CHECKING([whether extended attributes are supported])
+ touch conftest.tmp
+ if $SETFATTR -n user.pax.flags conftest.tmp >/dev/null 2>&1; then
+ AC_MSG_RESULT(yes)
+ else
+ AC_MSG_RESULT(no); SETFATTR=""
+ fi
+ rm -f conftest.tmp
+fi
+
## Need makeinfo >= 4.7 (?) to build the manuals.
AC_PATH_PROG(MAKEINFO, makeinfo, no)
dnl By this stage, configure has already checked for egrep and set EGREP,
--- emacs-24.3-orig/src/Makefile.in
+++ emacs-24.3/src/Makefile.in
@@ -115,6 +115,9 @@
## memory randomization in temacs with "paxctl -r". See bug#11398.
PAXCTL = @PAXCTL@
+## If available, the full path to the setfattr program.
+SETFATTR = @SETFATTR@
+
## Some systems define this to request special libraries.
LIBS_SYSTEM=@LIBS_SYSTEM@
@@ -467,6 +470,8 @@
-o temacs $(START_FILES) $(obj) $(otherobj) $(lib)/libgnu.a $(LIBES)
test "$(CANNOT_DUMP)" = "yes" || \
test "X$(PAXCTL)" = X || $(PAXCTL) -r temacs$(EXEEXT)
+ test "$(CANNOT_DUMP)" = "yes" || test "X$(SETFATTR)" = X || \
+ $(SETFATTR) -n user.pax.flags -v er temacs$(EXEEXT)
## The following oldxmenu-related rules are only (possibly) used if
## HAVE_X11 && !USE_GTK, but there is no harm in always defining them
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