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Technical Support
On-Line Manuals
Compiler Reference Guide
Conventions and Feedback
Introduction
Compiler Command-line Options
Language Extensions
Compiler-specific Features
Keywords and operators
__align
__alignof__
__ALIGNOF__
__asm
__forceinline
__global_reg
__inline
__int64
__INTADDR__
__irq
__packed
__pure
__smc
__softfp
__svc
__svc_indirect
__svc_indirect_r7
__value_in_regs
__weak
__writeonly
__declspec attributes
__declspec(dllexport)
__declspec(dllimport)
__declspec(noinline)
__declspec(noreturn)
__declspec(nothrow)
__declspec(notshared)
__declspec(thread)
Function attributes
__attribute__((alias)) function attribute
__attribute__((always_inline)) function attribute
__attribute__((const)) function attribute
__attribute__((constructor[(priority)])) function
__attribute__((deprecated)) function attribute
__attribute__((destructor[(priority)])) function a
__attribute__((format_arg(string-index))) function
__attribute__((malloc)) function attribute
__attribute__((noinline)) function attribute
__attribute__((nomerge)) function attribute
__attribute__((nonnull)) function attribute
__attribute__((noreturn)) function attribute
__attribute__((notailcall)) function attribute
__attribute__((pcs("calling_convention")
__attribute__((pure)) function attribute
__attribute__((section("name"))) functio
__attribute__((unused)) function attribute
__attribute__((used)) function attribute
__attribute__((visibility("visibility_type&qu
__attribute__((weak)) function attribute
__attribute__((weakref("target"))) funct
Type attributes
__attribute__((bitband)) type attribute
__attribute__((aligned)) type attribute
__attribute((packed)) type attribute
__attribute__((transparent_union)) type attribute
Variable attributes
__attribute__((alias)) variable attribute
__attribute__((at(address))) variable attribute
__attribute__((aligned)) variable attribute
__attribute__((deprecated)) variable attribute
__attribute__((noinline)) constant variable attrib
__attribute__((packed)) variable attribute
__attribute__((section("name"))) variabl
__attribute__((transparent_union)) variable attrib
__attribute__((unused)) variable attribute
__attribute__((used)) variable attribute
__attribute__((visibility("visibility_type&qu
__attribute__((weak)) variable attribute
__attribute__((weakref("target"))) varia
__attribute__((zero_init)) variable attribute
Pragmas
#pragma anon_unions, #pragma no_anon_unions
#pragma arm
#pragma arm section [section_type_list]
#pragma diag_default tag[,tag,...]
#pragma diag_error tag[,tag,...]
#pragma diag_remark tag[,tag,...]
#pragma diag_suppress tag[,tag,...]
#pragma diag_warning tag[, tag, ...]
#pragma exceptions_unwind, #pragma no_exceptions_u
#pragma hdrstop
#pragma import symbol_name
#pragma import(__use_full_stdio)
#pragma import(__use_smaller_memcpy)
#pragma inline, #pragma no_inline
#pragma no_pch
#pragma Onum
#pragma once
#pragma Ospace
#pragma Otime
#pragma pack(n)
#pragma pop
#pragma push
#pragma softfp_linkage, #pragma no_softfp_linkage
#pragma thumb
#pragma unroll [(n)]
#pragma unroll_completely
#pragma weak symbol, #pragma weak symbol1 = symbol
Instruction intrinsics
__breakpoint intrinsic
__cdp intrinsic
__clrex intrinsic
__clz intrinsic
__current_pc intrinsic
__current_sp intrinsic
__disable_fiq intrinsic
__disable_irq intrinsic
__enable_fiq intrinsic
__enable_irq intrinsic
__fabs intrinsic
__fabsf intrinsic
__force_stores intrinsic
__ldrex intrinsic
__ldrexd intrinsic
__ldrt intrinsic
__memory_changed intrinsic
__nop intrinsic
__pld intrinsic
__pldw intrinsic
__pli intrinsic
__promise intrinsic
__qadd intrinsic
__qdbl intrinsic
__qsub intrinsic
__rbit intrinsic
__rev intrinsic
__return_address intrinsic
__ror intrinsic
__schedule_barrier intrinsic
__semihost intrinsic
__sev intrinsic
__sqrt intrinsic
__sqrtf intrinsic
__ssat intrinsic
__strex intrinsic
__strexd intrinsic
__strt intrinsic
__swp intrinsic
__usat intrinsic
__wfe intrinsic
__wfi intrinsic
__yield intrinsic
ARMv6 SIMD intrinsics
ETSI basic operations
C55x intrinsics
VFP status intrinsic
__vfp_status intrinsic
Fused Multiply Add (FMA) intrinsics
Named register variables
Predefined macros
Built-in function name variables
C and C++ Implementation Details
Semihosting
ARMv6 SIMD Instruction Intrinsics
Via File Syntax
Standard C Implementation Definition
Standard C++ Implementation Definition
C and C++ Compiler Implementation Limits
Compiler Reference Guide
__attribute__((visibility("visibility_type"))) variable attribute
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| Home > Compiler-specific Features > __attribute__((visibility("visibility_type"))) variable attribute | |||
This variable attribute affects the visibility of ELF symbols.
Note
This attribute is a GNU compiler extension supported by the ARM compiler.
Syntax
__attribute__((visibility("visibility_type")))
where visibility_type
defaultThe assumed visibility of symbols can be changed by other options. Default visibility overrides such changes. Default visibility corresponds to external linkage.
hiddenThe symbol is not placed into the dynamic symbol table, so no other executable or shared library can directly reference it. Indirect references are possible using function pointers.
internalUnless otherwise specified by the processor-specific Application Binary Interface (psABI), internal visibility means that the function is never called from another module.
protectedThe symbol is placed into the dynamic symbol table, but references within the defining module bind to the local symbol. That is, the symbol cannot be overridden by another module.
Except when specifying default visibility,
this attribute is intended for use with declarations that would
otherwise have external linkage.
You can apply this attribute to functions and variables in C and C++. In C++, you can also apply it to class, struct, union, and enum types, and namespace declarations.
| Copyright © 2007-2008, 2011-2012 ARM. All rights reserved. | ARM DUI 0376D |
| Non-Confidential | ID062912 |
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| Home > Compiler-specific Features > __attribute__((visibility("visibility_type"))) variable attribute |
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