ELF: Discard a section if any of its linked-to sections has been discarded

Add ldelf_before_place_orphans to call before lang_place_orphans to
discard a section if any of its linked-to sections has been discarded.

	PR ld/25022
	* emultempl/aix.em (ld_${EMULATION_NAME}_emulation): Add
	before_place_orphans_default.
	* emultempl/armcoff.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/beos.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/generic.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/linux.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/msp430.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/pe.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/pep.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/ticoff.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/vanilla.em (ld_${EMULATION_NAME}_emulation): Likewise.
	* emultempl/elf.em (ld_${EMULATION_NAME}_emulation): Use
	ldelf_before_place_orphans.
	* ldelf.c (ldelf_before_place_orphans): New.
	* ldelf.h (ldelf_before_place_orphans): Likewise.
	* ldemul.c (ldemul_before_place_orphans): Likewise.
	(before_place_orphans_default): Likewise.
	* ldemul.h (ldemul_before_place_orphans): Likewise.
	(before_place_orphans_default): Likewise.
	(ld_emulation_xfer_struct): Add before_place_orphans.
	* ldlang.c (lang_process): Call ldemul_before_place_orphans
	before lang_place_orphans.
	* testsuite/ld-elf/pr25022.d: New file.
	* testsuite/ld-elf/pr25022.s: Likewise.
	* testsuite/ld-elf/pr25022.t: Likewise.

1 files changed, 1 insertions, 0 deletions

diff --git a/ld/ldelf.h b/ld/ldelf.h
index 492649b..2a58a0c 100644
--- a/ld/ldelf.h
+++ b/ld/ldelf.h
@@ -30,3 +30,4 @@ extern bfd_boolean ldelf_open_dynamic_archive
   (const char *, search_dirs_type *, lang_input_statement_type *);
 extern lang_output_section_statement_type *ldelf_place_orphan
   (asection *, const char *, int);
+extern void ldelf_before_place_orphans (void);