f5b51d6b94
Again address ipxe GCC 9 incompatibilities. Previously included patch to disable unneeded warning got muffed somehow (bsc#1121464) OBS-URL: https://build.opensuse.org/request/show/682912 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=458
36 lines
1.5 KiB
Diff
36 lines
1.5 KiB
Diff
From 0ee72a15887b838d967c3b05070d5ad86f0d729a Mon Sep 17 00:00:00 2001
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From: Bruce Rogers <brogers@suse.com>
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Date: Fri, 25 Jan 2019 10:29:16 -0700
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Subject: [PATCH] [build] Disable gcc address of packed member warning
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GCC 9.0 introduces a new warning for using pointers to packed
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structure and union members. ipxe code is replete with this usage,
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partly because the architectures it is designed for handle unaligned
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accesses. Therefore this warning is not very helpful and since the
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default build considers warnings to be errors, needs to be disabled.
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[BR: BSC#1121464]
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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--- a/src/Makefile.housekeeping
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+++ b/src/Makefile.housekeeping
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@@ -179,6 +179,19 @@ WNA_FLAGS := $(shell $(WNA_TEST) && $(EC
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WORKAROUND_CFLAGS += $(WNA_FLAGS)
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endif
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+# GCC 9.0 introduces a new warning for using pointers to packed
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+# structure and union members. ipxe code is replete with this usage,
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+# partly because the architectures it is designed for handle unaligned
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+# accesses. Therefore this warning is not very helpful and since the
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+# default build considers warnings to be errors, needs to be disabled.
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+#
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+ifeq ($(CCTYPE),gcc)
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+WNAOPM_TEST = $(CC) -Waddress-of-packed-member -x c -c /dev/null -o /dev/null \
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+ >/dev/null 2>&1
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+WNAOPM_FLAGS := $(shell $(WNAOPM_TEST) && $(ECHO) '-Wno-address-of-packed-member')
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+WORKAROUND_CFLAGS += $(WNAOPM_FLAGS)
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+endif
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+
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# Some versions of gas choke on division operators, treating them as
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# comment markers. Specifying --divide will work around this problem,
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# but isn't available on older gas versions.
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