[xen stable-4.16] build/x86: suppress GNU ld 2.39 warning about RWX load segments

[patchbot@xxxxxxx]

commit 3fd9a7d59523fb0555d0e89b11eeea5d53d2c54c
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Mon Aug 15 15:36:06 2022 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Aug 15 15:36:06 2022 +0200

    build/x86: suppress GNU ld 2.39 warning about RWX load segments
    
    Commit 68f5aac012b9 ("build: suppress future GNU ld warning about RWX
    load segments") didn't quite cover all the cases: Apparently I missed
    ones in the building of 32-bit helper objects because of only looking at
    incremental builds (where those wouldn't normally be re-built). Clone
    the workaround there to the specific Makefile in question.
    
    Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    master commit: 3eb1865ae305772b558757904d81951e31de43de
    master date: 2022-08-11 17:45:12 +0200
---
 xen/arch/x86/boot/build32.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/arch/x86/boot/build32.mk b/xen/arch/x86/boot/build32.mk
index e90680cd9f..d2fae5cf9e 100644
--- a/xen/arch/x86/boot/build32.mk
+++ b/xen/arch/x86/boot/build32.mk
@@ -8,6 +8,9 @@ CFLAGS += -Werror -fno-builtin -g0 -msoft-float
 CFLAGS += -I$(BASEDIR)/include
 CFLAGS := $(filter-out -flto,$(CFLAGS)) 
 
+LDFLAGS_DIRECT-$(shell $(LD) -v --warn-rwx-segments >/dev/null 2>&1 && echo y) 
:= --no-warn-rwx-segments
+LDFLAGS_DIRECT += $(LDFLAGS_DIRECT-y)
+
 # NB. awk invocation is a portable alternative to 'head -n -1'
 %.S: %.bin
        (od -v -t x $< | tr -s ' ' | awk 'NR > 1 {print s} {s=$$0}' | \
--
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