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Enabled linkonce support for Darwin.
authoraustern <austern@138bc75d-0d04-0410-961f-82ee72b054a4>
Fri, 12 Mar 2004 17:09:03 +0000 (17:09 +0000)
committeraustern <austern@138bc75d-0d04-0410-961f-82ee72b054a4>
Fri, 12 Mar 2004 17:09:03 +0000 (17:09 +0000)
commit2f9fc8efd7791829d4e81d6945cbe12ded8f94c3
treecaa8a2f6e25f2a2ca455a215f64f01003c8ba7c4
parentcd5edb432360227353f9d74a01082afedd347898
Enabled linkonce support for Darwin.

* target.h (struct gcc_target): New target hook, unwind_label.
* target-def.h (TARGET_ASM_EMIT_UNWIND_LABEL): New hook.
* output.h (default_emit_unwind_label): New function.
* default.h (TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY): New macro.
(TARGET_USES_WEAK_UNWIND_INFO): New target macro.
(TARGET_SUPPORTS_HIDDEN): New target macro.
* dwarf2out.c (struct dw_fde_struct): Add field for function decl
that corresponds to this FDE.
(FRAME_BEGIN_LABEL): Allow target to override default label.
(output_call_frame_info): If FDEs are linknonce, then use extra
indirection for FDE encoding, output a label for each FDE, and
output an empty label for each function without an FDE.
(dwarf2out_begin_prologue): Set up decl field when creating an FDE.
* varasm.c (globalize_decl): Call ASM_MAKE_LABEL_LINKONCE for
decls with DECL_ONE_ONLY set, if that macro is defined.
(make_decl_one_only): Don't use DECL_COMMON if we're compiling
for a SUPPORTS_ONE_ONLY target.
* config/darwin-protos.h (darwin_unique_section): Declare.
(darwin_asm_named_section): Likewise.
(darwin_section_type_flags): Likewise.
(darwin_non_lazy_pcrel): Likewise.
(darwin_emit_unwind_label): Likewise.
(darwin_make_decl_one_only): Likewise.
* config/darwin.c (machopic_finish): Get rid of tweak that
eliminate stubs for symbols that are defined.
(darwin_encode_section_info): Don't treat weak functions as defined.
(darwin_make_decl_one_only): Define.
(darwin_asm_named_section): Likewise.
(darwin_section_type_flags): Likewise.
(darwin_unique_section): Likewise.
(darwin_emit_unwind_label): Likewise.
(darwin_non_lazy_pcrel): Likewise.
(darwin_asm_output_dwarf_delta): Difference between two labels is
local only if both labels are local.
* config/darwin.h (MAKE_DECL_ONE_ONLY): Define.
(ASM_MAKE_LABEL_LINKONCE): Likewise.
(TARGET_SUPPORTS_HIDDEN): Likewise.
(TARGET_USES_WEAK_UNWIND_INFO): Likewise.
(TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY): Likewise.
(FRAME_BEGIN_LABEL): Likewise.
(ASM_DECLARE_OBJECT_NAME): Make references to weak symbols indirect.
(ASM_DECLARE_FUNCTION_NAME): Likewise.
(darwin_eh_frame_section): Give __eh_frame section the coalesced flag.
(TARGET_ASM_UNIQUE_SECTION): Define.
(EH_FRAME_SECTION_NAME): Define.
(EH_FRAME_SECTION_ATTR): Likewise.
(ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX): Likewise.
(TARGET_ASM_NAMED_SECTION): Likewise.
(TARGET_SECTION_TYPE_FLAGS): Likewise.
* doc/tm.texi: Document TARGET_USES_WEAK_UNWIND_INFO,
TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY, TARGET_SUPPORTS_HIDDEN,
TARGET_ASM_EMIT_UNWIND_LABEL.

* cp/decl2.c (maybe_make_one_only): Look at
TARGET_EXPLICIT_INSTANTIATION_ONE_ONLY when deciding whether
to make an explicit instantiation weak.
* cp/method.c (use_thunk): Make sure we call comdat_linkage
when appropriate.
* cp/pt.c (do_type_instantiation): On systems where weak symbols
don't go in a static archive's TOC, explicit instantiation of a
class must imply *explicit* instantiation of its memeber.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@79394 138bc75d-0d04-0410-961f-82ee72b054a4
17 files changed:
gcc/ChangeLog
gcc/config/darwin-protos.h
gcc/config/darwin.c
gcc/config/darwin.h
gcc/cp/ChangeLog
gcc/cp/decl2.c
gcc/cp/method.c
gcc/cp/pt.c
gcc/defaults.h
gcc/doc/tm.texi
gcc/dwarf2out.c
gcc/output.h
gcc/target-def.h
gcc/target.h
gcc/varasm.c
libffi/src/powerpc/darwin.S
libffi/src/powerpc/darwin_closure.S