diff options
author | Matt Austern <austern@apple.com> | 2004-03-12 17:09:03 +0000 |
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committer | Matt Austern <austern@apple.com> | 2004-03-12 17:09:03 +0000 |
commit | 622dd78b4174ef0e7aef567e8680b2a40837665f (patch) | |
tree | caa8a2f6e25f2a2ca455a215f64f01003c8ba7c4 /gcc/defaults.h | |
parent | 0cd74d0cde48ad9e904248444010edb9488bd745 (diff) |
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: https://gcc.gnu.org/svn/gcc/trunk@79394 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/defaults.h')
-rw-r--r-- | gcc/defaults.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/defaults.h b/gcc/defaults.h index 7d34e3cd30b..602cbdd72a1 100644 --- a/gcc/defaults.h +++ b/gcc/defaults.h @@ -237,6 +237,18 @@ do { fputs (integer_asm_op (POINTER_SIZE / BITS_PER_UNIT, TRUE), FILE); \ #endif #endif +/* Determines whether explicit template instantiations should + be given link-once semantics. The C++ ABI requires this + macro to be nonzero; see the documentation. */ +#ifndef TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY +# define TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY 1 +#endif + +/* This determines whether or not we need linkonce unwind information */ +#ifndef TARGET_USES_WEAK_UNWIND_INFO +#define TARGET_USES_WEAK_UNWIND_INFO 0 +#endif + /* By default, there is no prefix on user-defined symbols. */ #ifndef USER_LABEL_PREFIX #define USER_LABEL_PREFIX "" @@ -258,6 +270,24 @@ do { fputs (integer_asm_op (POINTER_SIZE / BITS_PER_UNIT, TRUE), FILE); \ # endif #endif +/* This determines whether this target supports hidden visibility. + This is a weaker condition than HAVE_GAS_HIDDEN, which probes for + specific assembler syntax. */ +#ifndef TARGET_SUPPORTS_HIDDEN +# ifdef HAVE_GAS_HIDDEN +# define TARGET_SUPPORTS_HIDDEN 1 +# else +# define TARGET_SUPPORTS_HIDDEN 0 +# endif +#endif + +/* Determines whether we may use common symbols to represent one-only + semantics (a.k.a. "vague linkage"). */ +#ifndef USE_COMMON_FOR_ONE_ONLY +# define USE_COMMON_FOR_ONE_ONLY 1 +#endif + + /* If the target supports init_priority C++ attribute, give SUPPORTS_INIT_PRIORITY a nonzero value. */ #ifndef SUPPORTS_INIT_PRIORITY |