Many distributors use this, so we might as well see the warnings as
well.
# Force _GNU_SOURCE on; plperl is broken with Perl 5.8.0 otherwise
CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
+# Many distributors use this, so we might as well see the warnings as well.
+CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2"
+
# If --enable-profiling is specified, we need -DLINUX_PROFILE
PLATFORM_PROFILE_FLAGS="-DLINUX_PROFILE"