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[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>
This commit is contained in:
Michael Brown 2017-06-14 12:33:16 +01:00
parent 62573b99cc
commit 7c395b0e21
1 changed files with 8 additions and 3 deletions
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11
src/arch/i386/Makefile
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@ -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