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Compiler Reference Guide
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Introduction
Compiler Command-line Options
-Aopt
--allow_fpreg_for_nonfpdata, --no_allow_fpreg_for_
--allow_null_this, --no_allow_null_this
--alternative_tokens, --no_alternative_tokens
--anachronisms, --no_anachronisms
--apcs=qualifer...qualifier
--arm
--arm_only
--asm
--asm_dir=directory_name
--autoinline, --no_autoinline
--bigend
--bitband
--brief_diagnostics, --no_brief_diagnostics
--bss_threshold=num
-c
-C
--c90
--c99
--code_gen, --no_code_gen
--compatible=name
--compile_all_input, --no_compile_all_input
--conditionalize, --no_conditionalize
--cpp
--cpu=list
--cpu=name
--create_pch=filename
-Dname[(parm-list)][=def]
--data_reorder, --no_data_reorder
--debug, --no_debug
--debug_macros, --no_debug_macros
--default_extension=ext
--dep_name, --no_dep_name
--depend=filename
--depend_dir=directory_name
--depend_format=string
--depend_single_line, --no_depend_single_line
--depend_system_headers, --no_depend_system_header
--depend_target=target
--diag_error=tag[,tag,...]
--diag_remark=tag[,tag,...]
--diag_style={arm|ide}
--diag_suppress=tag[,tag,...]
--diag_suppress=optimizations
--diag_warning=tag[,tag,...]
--diag_warning=optimizations
--dollar, --no_dollar
--dwarf2
--dwarf3
-E
--echo
--emit_frame_directives, --no_emit_frame_directive
--enum_is_int
--errors=filename
--exceptions, --no_exceptions
--exceptions_unwind, --no_exceptions_unwind
--extended_initializers, --no_extended_initializer
--feedback=filename
--force_new_nothrow, --no_force_new_nothrow
--forceinline
--fp16_format=format
--fpmode=model
--fpu=list
--fpu=name
--friend_injection, --no_friend_injection
-g
--global_reg=reg_name[,reg_name,...]
--guiding_decls, --no_guiding_decls
--help
-Idir[,dir,...]
--ignore_missing_headers
--implicit_include, --no_implicit_include
--implicit_include_searches, --no_implicit_include
--implicit_key_function, --no_implicit_key_functio
--implicit_typename, --no_implicit_typename
--info=totals
--inline, --no_inline
--interface_enums_are_32_bit
--interleave
-Jdir[,dir,...]
--kandr_include
-Lopt
--library_interface=lib
--library_type=lib
--licretry
--link_all_input, --no_link_all_input
--list
--list_dir=directory_name
--list_macros
--littleend
--locale=lang_country
--long_long
--loose_implicit_cast
--lower_ropi, --no_lower_ropi
--lower_rwpi, --no_lower_rwpi
--ltcg
-M
--md
--message_locale=lang_country[.codepage]
--min_array_alignment=opt
--mm
--multibyte_chars, --no_multibyte_chars
--multifile, --no_multifile
--multiply_latency=cycles
--nonstd_qualifier_deduction, --no_nonstd_qualifie
-o filename
-Onum
--old_specializations, --no_old_specializations
--old_style_preprocessing
--omf_browse
-Ospace
-Otime
--output_dir=directory_name
-P
--parse_templates, --no_parse_templates
--pch
--pch_dir=dir
--pch_messages, --no_pch_messages
--pch_verbose, --no_pch_verbose
--pending_instantiations=n
--phony_targets
--pointer_alignment=num
--preinclude=filename
--preprocess_assembly
--preprocessed
--protect_stack, --no_protect_stack
--reassociate_saturation, --no_reassociate_saturat
--reduce_paths, --no_reduce_paths
--remarks
--remove_unneeded_entities, --no_remove_unneeded_e
--restrict, --no_restrict
--retain=option
--rtti, --no_rtti
--rtti_data, --no_rtti_data
-S
--show_cmdline
--signed_bitfields, --unsigned_bitfields
--signed_chars, --unsigned_chars
--split_ldm
--split_sections
--strict, --no_strict
--strict_warnings
--sys_include
--thumb
--trigraphs, --no_trigraphs
--type_traits_helpers, --no_type_traits_helpers
-Uname
--unaligned_access, --no_unaligned_access
--use_frame_pointer
--use_pch=filename
--using_std, --no_using_std
--version_number
--vfe, --no_vfe
--via=filename
--vla, --no_vla
--vsn
-W
--wchar, --no_wchar
--wchar16
--wchar32
--whole_program
--wrap_diagnostics, --no_wrap_diagnostics
Language Extensions
Compiler-specific Features
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
--signed_bitfields, --unsigned_bitfields
| |||
| Home > Compiler Command-line Options > --signed_bitfields, --unsigned_bitfields | |||
This option makes bitfields of type int signed or unsigned.
The C Standard specifies that if the type specifier used in declaring a bitfield is either int, or a typedef name defined as int, then whether the bitfield is signed or unsigned is dependent on the implementation.
DefaultThe default is --unsigned_bitfields.
Note
The AAPCS requirement for bitfields to default to unsigned on ARM, is relaxed in version 2.03 of the standard.
typedef int integer;
struct
{
integer x : 1;
} bf;
Compiling this code with --signed_bitfields causes
to be treated as a signed bitfield.
| Copyright © 2007-2008, 2011-2012 ARM. All rights reserved. | ARM DUI 0376D |
| Non-Confidential | ID062912 |
 PDF version | |
| Home > Compiler Command-line Options > --signed_bitfields, --unsigned_bitfields |
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