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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 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__((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 unroll [(n)] #pragma unroll_completely #pragma thumb #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 __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 See also ETSI basic operations Example See also C55x intrinsics Example See also VFP status intrinsic __vfp_status intrinsic Fused Multiply Add (FMA) intrinsics Named register variables Syntax Usage Examples See also Compiler predefines Predefined macros Function names C and C++ Implementation Details ARMv6 SIMD Instruction Intrinsics Via File Syntax Summary Table of GNU Language Extensions Standard C Implementation Definition Standard C++ Implementation Definition C and C++ Compiler Implementation Limits__attribute__((visibility("visibility_type"))) function attribute
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| Home > Compiler-specific Features > Function attributes > __attribute__((visibility("visibility_type"))) function attribute | |||
This function 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++, it can also be applied to class, struct, union, and enum types, and namespace declarations.
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