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[Bug gas/27753] New: -mx86-used-note= defaulting to yes regresses


From: jbeulich at suse dot com
Subject: [Bug gas/27753] New: -mx86-used-note= defaulting to yes regresses
Date: Mon, 19 Apr 2021 15:26:29 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=27753

            Bug ID: 27753
           Summary: -mx86-used-note= defaulting to yes regresses
           Product: binutils
           Version: 2.36.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: jbeulich at suse dot com
  Target Milestone: ---

In the Xen project, to test the internal insn emulator, we have a simple way of
generating binary blobs to hand to the emulator:

%.bin: %.c
        $(CC) $(filter-out -M% .%,$(CFLAGS)) -c $<
        $(LD) $(LDFLAGS_DIRECT) -N -Ttext 0x100000 -o $*.tmp $*.o
        $(OBJCOPY) -O binary $*.tmp $@

Up to 2.35 this has been working fine. The introduction (by default) of the
.note.gnu.property section has led to all of the resulting *.bin files to be
about 128Mb in size.

Such options causing extra content to be created should imo never default to
true.

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