strip: Properly handle LLVM IR bitcodeHEADmaster

commit 717a38e9a02109fcbcb18bb2ec3aa251e2ad0a0d
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Sun May 4 05:12:46 2025 +0800

    strip: Add GCC LTO IR support

added "-R .gnu.lto_.*" to strip to remove all GCC LTO sections.  When
"-R .gnu.lto_.*" is used, the plugin target is ignored so that all LTO
sections are stripped as the regular sections.  It works for the slim
GCC LTO IR since the GCC LTO IR is stored in the regular sections.  When
the plugin target is ignored, the GCC LTO IR can be recognized as the
normal object files.  But it doesn't work for the slim LLVM IR which
is stored in a standalone file.

1. Add bfd_check_format_matches_lto and bfd_check_format_lto to take an
argument, lto_sections_removed, to indicate if all LTO sections should
be removed.
2. Update strip to always enable the plugin target so that the plugin
target is enabled when checking for bfd_archive.
3. Update strip to ignore the plugin target for bfd_object when all LTO
sections should be removed.  If the object is unknown, copy it as an
unknown file without any messages.
4. Treat the "-R .llvm.lto" strip option as removing all LTO sections.

bfd/

	PR binutils/33198
	* format.c (bfd_check_format_lto): New function.
	(bfd_check_format): Call bfd_check_format_matches_lto.
	(bfd_check_format_matches): Renamed to ...
	(bfd_check_format_matches_lto): This.  Add an argument,
	lto_sections_removed, to indicate if all LTO sections should be
	removed and don't match the plugin target if lto_sections_removed
	is true.
	(bfd_check_format_matches): Call bfd_check_format_matches_lto.
	* bfd-in2.h: Regenerated.

binutils/

	PR binutils/33198
	* objcopy.c (copy_archive): Call bfd_check_format_lto, instead
	of bfd_check_format, and pass lto_sections_removed.  Remove the
	non-fatal message on unknown element since it will be copied as
	an unknown file.
	(copy_file): Don't check lto_sections_removed when enabling LTO
	plugin in strip.
	(copy_file): Ignore the plugin target first if all LTO sections
	should be removed.  Try with the plugin target next if ignoring
	the plugin target failed to match the format.
	(strip_main): Also set lto_sections_removed for -R .llvm.lto.
	* testsuite/binutils-all/x86-64/pr33198.c: New file.
	* testsuite/binutils-all/x86-64/x86-64.exp (run_pr33198_test):
	New.
	Run binutils/33198 tests.
	* testsuite/lib/binutils-common.exp (llvm_plug_opt): New.
	(CLANG_FOR_TARGET): New.  Set to "clang" for native build if
	"clang -v" reports "clang version".

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>

0 files changed, 0 insertions, 0 deletions