[build] Use -no-pie on newer versions of gcc

Some distributions patch gcc to generate position independent
executables by default.  We currently include a workaround to check
for this and to add -fno-PIE -nopie to CFLAGS if required.

Newer patched versions of gcc require -fno-PIE -no-pie instead.  Check
for both variants.

Reported-by: Nathan Rennie-Waldock <nathan.renniewaldock@gmail.com>
Originally-fixed-by: Markos Chandras <mchandras@suse.de>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/i386/Makefile

@@ -74,10 +74,15 @@ CFLAGS			+= -Ui386
 # recognise an option that starts with "no", so we have to test for
 # output on stderr instead of checking the exit status.
 #
+# Current versions of gcc require -no-pie; older versions require
+# -nopie.  We therefore test for both.
+#
 ifeq ($(CCTYPE),gcc)
-PIE_TEST = [ -z "`$(CC) -fno-PIE -nopie -x c -c /dev/null -o /dev/null 2>&1`" ]
-PIE_FLAGS := $(shell $(PIE_TEST) && $(ECHO) '-fno-PIE -nopie')
-WORKAROUND_CFLAGS += $(PIE_FLAGS)
+PIE_TEST = [ -z "`$(CC) -fno-PIE -no-pie -x c -c /dev/null -o /dev/null 2>&1`" ]
+PIE_FLAGS := $(shell $(PIE_TEST) && $(ECHO) '-fno-PIE -no-pie')
+PIE_TEST2 = [ -z "`$(CC) -fno-PIE -nopie -x c -c /dev/null -o /dev/null 2>&1`" ]
+PIE_FLAGS2 := $(shell $(PIE_TEST2) && $(ECHO) '-fno-PIE -nopie')
+WORKAROUND_CFLAGS += $(PIE_FLAGS) $(PIE_FLAGS2)
 endif
 
 # i386-specific directories containing source files