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[build] Apply the "-fno-PIE -nopie" workaround only to i386 builds 

Hardened versions of gcc default to building position-independent
code, which breaks our i386 build.  Our build process therefore
detects such platforms and automatically adds "-fno-PIE -nopie" to the
gcc command line.

On x86_64, we choose to build position-independent code (in order to
reduce the final binary size and, in particular, the number of
relocations required for UEFI binaries).  The workaround therefore
breaks the build process for x86_64 binaries on such platforms.

Fix by moving the workaround to the i386-specific portion of the
Makefile.

Reported-by: Jan Kundrát <jkt@kde.org>
Debugged-by: Jan Kundrát <jkt@kde.org>
Debugged-by: Marin Hannache <git@mareo.fr>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/34/head
Michael Brown 2015-02-12 15:58:26 +00:00
parent 907cffb7c5
commit 5de134662d
2 changed files with 11 additions and 11 deletions
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11
src/Makefile.housekeeping
View File

@ -157,17 +157,6 @@ SP_FLAGS := $(shell $(SP_TEST) && $(ECHO) '-fno-stack-protector')
WORKAROUND_CFLAGS += $(SP_FLAGS)
endif
# Some widespread patched versions of gcc include -fPIE -Wl,-pie by
# default. Note that gcc will exit *successfully* if it fails to
# recognise an option that starts with "no", so we have to test for
# output on stderr instead of checking the exit status.
#
ifeq ($(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)
endif
# gcc 4.4 generates .eh_frame sections by default, which distort the
# output of "size". Inhibit this.
#

11
src/arch/i386/Makefile
View File

@ -69,6 +69,17 @@ CFLAGS += -fshort-wchar
#
CFLAGS += -Ui386
# Some widespread patched versions of gcc include -fPIE -Wl,-pie by
# default. Note that gcc will exit *successfully* if it fails to
# recognise an option that starts with "no", so we have to test for
# output on stderr instead of checking the exit status.
#
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 += $(PIE_FLAGS)
endif
# Define version string for lkrnprefix.S
#
CFLAGS_lkrnprefix += -DVERSION="\"$(VERSION)\""