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crt files and statically linked libgcc objects cause false positives
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in annobin coverage, so we add the assembler flag to generate notes
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for them.
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The patch also adds notes to libgcc_s.so, but this is harmless because
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these notes only confer that there is no other annobin markup.
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2018-07-25 Florian Weimer <fweimer@redhat.com>
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* Makefile.in (LIBGCC2_CFLAGS, CRTSTUFF_CFLAGS): Add
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-Wa,--generate-missing-build-notes=yes.
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--- libgcc/Makefile.in 2018-01-13 13:05:41.000000000 +0100
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+++ libgcc/Makefile.in 2018-07-25 13:15:02.036226940 +0200
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@@ -246,6 +246,7 @@ LIBGCC2_DEBUG_CFLAGS = -g
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LIBGCC2_CFLAGS = -O2 $(LIBGCC2_INCLUDES) $(GCC_CFLAGS) $(HOST_LIBGCC2_CFLAGS) \
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$(LIBGCC2_DEBUG_CFLAGS) -DIN_LIBGCC2 \
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-fbuilding-libgcc -fno-stack-protector \
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+ -Wa,--generate-missing-build-notes=yes \
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$(INHIBIT_LIBC_CFLAGS)
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# Additional options to use when compiling libgcc2.a.
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@@ -301,6 +302,7 @@ CRTSTUFF_CFLAGS = -O2 $(GCC_CFLAGS) $(IN
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$(NO_PIE_CFLAGS) -finhibit-size-directive -fno-inline -fno-exceptions \
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-fno-zero-initialized-in-bss -fno-toplevel-reorder -fno-tree-vectorize \
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-fbuilding-libgcc -fno-stack-protector $(FORCE_EXPLICIT_EH_REGISTRY) \
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+ -Wa,--generate-missing-build-notes=yes \
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$(INHIBIT_LIBC_CFLAGS) $(USE_TM_CLONE_REGISTRY)
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# Extra flags to use when compiling crt{begin,end}.o.
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