staging: usbip: userspace: add option to turn fortify on or off

This comes handy when hacking with different cross
compilers, some of which may or may not have
_FORTIFY_SOURCE turned on by default. This patch
allows us to turn _FORTIFY_SOURCE on by specifying
--with-fortify option at configuration time (or
to turn it off by specifying --without-fortify).

If nothing is specified, default compiler behavior
is assumed.

Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/usbip/userspace/configure.ac b/drivers/staging/usbip/userspace/configure.ac
index 6d52841..2be4060 100644 (file)
--- a/drivers/staging/usbip/userspace/configure.ac
+++ b/drivers/staging/usbip/userspace/configure.ac
@@ -91,5 +91,22 @@ AC_ARG_WITH([usbids-dir],
            [USBIDS_DIR=$withval], [USBIDS_DIR="/usr/share/hwdata/"])
 AC_SUBST([USBIDS_DIR])
 
+# use _FORTIFY_SOURCE
+AC_MSG_CHECKING([whether to use fortify])
+AC_ARG_WITH([fortify],
+           [AS_HELP_STRING([--with-fortify],
+                           [use _FORTIFY_SROUCE option when compiling)])],
+                           dnl [ACTION-IF-GIVEN]
+                           [if test "$withval" = "yes"; then
+                               AC_MSG_RESULT([yes])
+                               CFLAGS="$CFLAGS -D_FORTIFY_SOURCE -O"
+                            else
+                               AC_MSG_RESULT([no])
+                               CFLAGS="$CFLAGS -U_FORTIFY_SOURCE"
+                            fi
+                           ],
+                           dnl [ACTION-IF-NOT-GIVEN]
+                           [AC_MSG_RESULT([default])])
+
 AC_CONFIG_FILES([Makefile libsrc/Makefile src/Makefile])
 AC_OUTPUT