-Wswitch -Wswitch-default -Wswitch-enum -Wsync-nand @gol
-Wsystem-headers -Wtrigraphs -Wtype-limits -Wundef -Wuninitialized @gol
-Wunknown-pragmas -Wno-pragmas -Wunreachable-code @gol
--Wunused -Wunused-function -Wunused-label -Wunused-parameter @gol
--Wunused-value -Wunused-variable @gol
+-Wunsuffixed-float-constants -Wunused -Wunused-function @gol
+-Wunused-label -Wunused-parameter -Wunused-value -Wunused-variable @gol
-Wvariadic-macros -Wvla @gol
-Wvolatile-register-var -Wwrite-strings}
-fdump-tree-gimple@r{[}-raw@r{]} -fdump-tree-mudflap@r{[}-@var{n}@r{]} @gol
-fdump-tree-dom@r{[}-@var{n}@r{]} @gol
-fdump-tree-dse@r{[}-@var{n}@r{]} @gol
+-fdump-tree-phiprop@r{[}-@var{n}@r{]} @gol
-fdump-tree-phiopt@r{[}-@var{n}@r{]} @gol
-fdump-tree-forwprop@r{[}-@var{n}@r{]} @gol
-fdump-tree-copyrename@r{[}-@var{n}@r{]} @gol
-fdump-tree-nrv -fdump-tree-vect @gol
-fdump-tree-sink @gol
-fdump-tree-sra@r{[}-@var{n}@r{]} @gol
+-fdump-tree-forwprop@r{[}-@var{n}@r{]} @gol
-fdump-tree-fre@r{[}-@var{n}@r{]} @gol
-fdump-tree-vrp@r{[}-@var{n}@r{]} @gol
-ftree-vectorizer-verbose=@var{n} @gol
-fstrict-aliasing -fstrict-overflow -fthread-jumps -ftracer @gol
-ftree-builtin-call-dce -ftree-ccp -ftree-ch -ftree-copy-prop @gol
-ftree-copyrename -ftree-dce @gol
--ftree-dominator-opts -ftree-dse -ftree-fre -ftree-loop-im @gol
--ftree-loop-distribution @gol
+-ftree-dominator-opts -ftree-dse -ftree-forwprop -ftree-fre -ftree-loop-im @gol
+-ftree-phiprop -ftree-loop-distribution @gol
-ftree-loop-ivcanon -ftree-loop-linear -ftree-loop-optimize @gol
--ftree-parallelize-loops=@var{n} -ftree-pre -ftree-reassoc @gol
+-ftree-parallelize-loops=@var{n} -ftree-pre -ftree-pta -ftree-reassoc @gol
-ftree-sink -ftree-sra -ftree-switch-conversion @gol
-ftree-ter -ftree-vect-loop-version -ftree-vectorize -ftree-vrp @gol
-funit-at-a-time -funroll-all-loops -funroll-loops @gol
-mno-wide-multiply -mrtd -malign-double @gol
-mpreferred-stack-boundary=@var{num}
-mincoming-stack-boundary=@var{num}
--mcld -mcx16 -msahf -mrecip @gol
+-mcld -mcx16 -msahf -mmovbe -mrecip @gol
-mmmx -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -mavx @gol
-maes -mpclmul @gol
-msse4a -m3dnow -mpopcnt -mabm -msse5 @gol
@emph{IA-64 Options}
@gccoptlist{-mbig-endian -mlittle-endian -mgnu-as -mgnu-ld -mno-pic @gol
--mvolatile-asm-stop -mregister-names -mno-sdata @gol
--mconstant-gp -mauto-pic -minline-float-divide-min-latency @gol
+-mvolatile-asm-stop -mregister-names -msdata -mno-sdata @gol
+-mconstant-gp -mauto-pic -mfused-madd @gol
+-minline-float-divide-min-latency @gol
-minline-float-divide-max-throughput @gol
+-mno-inline-float-divide @gol
-minline-int-divide-min-latency @gol
-minline-int-divide-max-throughput @gol
+-mno-inline-int-divide @gol
-minline-sqrt-min-latency -minline-sqrt-max-throughput @gol
--mno-dwarf2-asm -mearly-stop-bits @gol
+-mno-inline-sqrt @gol
+-mdwarf2-asm -mearly-stop-bits @gol
-mfixed-range=@var{register-range} -mtls-size=@var{tls-size} @gol
--mtune=@var{cpu-type} -mt -pthread -milp32 -mlp64 @gol
--mno-sched-br-data-spec -msched-ar-data-spec -mno-sched-control-spec @gol
+-mtune=@var{cpu-type} -milp32 -mlp64 @gol
+-msched-br-data-spec -msched-ar-data-spec -msched-control-spec @gol
-msched-br-in-data-spec -msched-ar-in-data-spec -msched-in-control-spec @gol
--msched-ldc -mno-sched-control-ldc -mno-sched-spec-verbose @gol
--mno-sched-prefer-non-data-spec-insns @gol
--mno-sched-prefer-non-control-spec-insns @gol
--mno-sched-count-spec-in-critical-path}
+-msched-spec-ldc -msched-spec-control-ldc @gol
+-msched-prefer-non-data-spec-insns -msched-prefer-non-control-spec-insns @gol
+-msched-stop-bits-after-every-cycle -msched-count-spec-in-critical-path @gol
+-msel-sched-dont-check-control-spec -msched-fp-mem-deps-zero-cost @gol
+-msched-max-memory-insns-hard-limit -msched-max-memory-insns=@var{max-insns}}
@emph{M32R/D Options}
@gccoptlist{-m32r2 -m32rx -m32r @gol
Enable handling of OpenMP directives @code{#pragma omp} in C/C++ and
@code{!$omp} in Fortran. When @option{-fopenmp} is specified, the
compiler generates parallel code according to the OpenMP Application
-Program Interface v2.5 @w{@uref{http://www.openmp.org/}}. This option
+Program Interface v3.0 @w{@uref{http://www.openmp.org/}}. This option
implies @option{-pthread}, and thus is only supported on targets that
have support for @option{-pthread}.
@gccoptlist{-Wclobbered @gol
-Wempty-body @gol
-Wignored-qualifiers @gol
--Wlogical-op @gol
-Wmissing-field-initializers @gol
-Wmissing-parameter-type @r{(C only)} @gol
-Wold-style-declaration @r{(C only)} @gol
to @code{int}. Also warn about any @code{return} statement with no
return-value in a function whose return-type is not @code{void}
(falling off the end of the function body is considered returning
-without a value), and about a @code{return} statement with a
+without a value), and about a @code{return} statement with an
expression in a function whose return-type is @code{void}.
For C++, a function without return type always produces a diagnostic
@opindex Wno-logical-op
Warn about suspicious uses of logical operators in expressions.
This includes using logical operators in contexts where a
-bit-wise operator is likely to be expected. This warning is enabled by
-@option{-Wextra}.
+bit-wise operator is likely to be expected.
@item -Waggregate-return
@opindex Waggregate-return
This option is implied by @option{-pedantic}, and can be disabled with
@option{-Wno-overlength-strings}.
+
+@item -Wunsuffixed-float-constants
+@opindex Wunsuffixed-float-constants
+
+GCC will issue a warning for any floating constant that does not have
+a suffix. When used together with @option{-Wsystem-headers} it will
+warn about such constants in system header files. This can be useful
+when preparing code to use with the @code{FLOAT_CONST_DECIMAL64} pragma
+from the decimal floating-point extension to C99.
@end table
@node Debugging Options
@itemx -fdump-rtl-@var{pass}
@opindex d
Says to make debugging dumps during compilation at times specified by
-@var{letters}. This is used for debugging the RTL-based passes of the
-compiler. The file names for most of the dumps are made by appending a
-pass number and a word to the @var{dumpname}. @var{dumpname} is generated
-from the name of the output file, if explicitly specified and it is not
-an executable, otherwise it is the basename of the source file. These
-switches may have different effects when @option{-E} is used for
-preprocessing.
+@var{letters}. This is used for debugging the RTL-based passes of the
+compiler. The file names for most of the dumps are made by appending
+a pass number and a word to the @var{dumpname}, and the files are
+created in the directory of the output file. @var{dumpname} is
+generated from the name of the output file, if explicitly specified
+and it is not an executable, otherwise it is the basename of the
+source file. These switches may have different effects when
+@option{-E} is used for preprocessing.
Debug dumps can be enabled with a @option{-fdump-rtl} switch or some
@option{-d} option @var{letters}. Here are the possible
@opindex fdump-translation-unit
Dump a representation of the tree structure for the entire translation
unit to a file. The file name is made by appending @file{.tu} to the
-source file name. If the @samp{-@var{options}} form is used, @var{options}
+source file name, and the file is created in the same directory as the
+output file. If the @samp{-@var{options}} form is used, @var{options}
controls the details of the dump as described for the
@option{-fdump-tree} options.
@itemx -fdump-class-hierarchy-@var{options} @r{(C++ only)}
@opindex fdump-class-hierarchy
Dump a representation of each class's hierarchy and virtual function
-table layout to a file. The file name is made by appending @file{.class}
-to the source file name. If the @samp{-@var{options}} form is used,
-@var{options} controls the details of the dump as described for the
-@option{-fdump-tree} options.
+table layout to a file. The file name is made by appending
+@file{.class} to the source file name, and the file is created in the
+same directory as the output file. If the @samp{-@var{options}} form
+is used, @var{options} controls the details of the dump as described
+for the @option{-fdump-tree} options.
@item -fdump-ipa-@var{switch}
@opindex fdump-ipa
Control the dumping at various stages of inter-procedural analysis
-language tree to a file. The file name is generated by appending a switch
-specific suffix to the source file name. The following dumps are possible:
+language tree to a file. The file name is generated by appending a
+switch specific suffix to the source file name, and the file is created
+in the same directory as the output file. The following dumps are
+possible:
@table @samp
@item all
@item -fdump-statistics-@var{option}
@opindex -fdump-statistics
Enable and control dumping of pass statistics in a separate file. The
-file name is generated by appending a suffix ending in @samp{.statistics}
-to the source file name. If the @samp{-@var{option}} form is used,
-@samp{-stats} will cause counters to be summed over the whole compilation unit
-while @samp{-details} will dump every event as the passes generate them.
-The default with no option is to sum counters for each function compiled.
+file name is generated by appending a suffix ending in
+@samp{.statistics} to the source file name, and the file is created in
+the same directory as the output file. If the @samp{-@var{option}}
+form is used, @samp{-stats} will cause counters to be summed over the
+whole compilation unit while @samp{-details} will dump every event as
+the passes generate them. The default with no option is to sum
+counters for each function compiled.
@item -fdump-tree-@var{switch}
@itemx -fdump-tree-@var{switch}-@var{options}
@opindex fdump-tree
Control the dumping at various stages of processing the intermediate
-language tree to a file. The file name is generated by appending a switch
-specific suffix to the source file name. If the @samp{-@var{options}}
-form is used, @var{options} is a list of @samp{-} separated options that
-control the details of the dump. Not all options are applicable to all
-dumps, those which are not meaningful will be ignored. The following
-options are available
+language tree to a file. The file name is generated by appending a
+switch specific suffix to the source file name, and the file is
+created in the same directory as the output file. If the
+@samp{-@var{options}} form is used, @var{options} is a list of
+@samp{-} separated options that control the details of the dump. Not
+all options are applicable to all dumps, those which are not
+meaningful will be ignored. The following options are available
@table @samp
@item address
-ftree-dce @gol
-ftree-dominator-opts @gol
-ftree-dse @gol
+-ftree-forwprop @gol
-ftree-fre @gol
+-ftree-phiprop @gol
-ftree-sra @gol
+-ftree-pta @gol
-ftree-ter @gol
-funit-at-a-time}
is active, two passes are performed and the second is scheduled after
loop unrolling.
-This option is enabled by default at optimization levels @option{-O2},
-@option{-O3}, @option{-Os}.
+This option is enabled by default at optimization levels @option{-O},
+@option{-O2}, @option{-O3}, @option{-Os}.
@item -fomit-frame-pointer
@opindex fomit-frame-pointer
Perform partial redundancy elimination (PRE) on trees. This flag is
enabled by default at @option{-O2} and @option{-O3}.
+@item -ftree-forwprop
+@opindex ftree-forwprop
+Perform forward propagation on trees. This flag is enabled by default
+at @option{-O} and higher.
+
@item -ftree-fre
@opindex ftree-fre
Perform full redundancy elimination (FRE) on trees. The difference
This analysis is faster than PRE, though it exposes fewer redundancies.
This flag is enabled by default at @option{-O} and higher.
+@item -ftree-phiprop
+@opindex ftree-phiprop
+Perform hoisting of loads from conditional pointers on trees. This
+pass is enabled by default at @option{-O} and higher.
+
@item -ftree-copy-prop
@opindex ftree-copy-prop
Perform copy propagation on trees. This pass eliminates unnecessary
@item -fipa-matrix-reorg
@opindex fipa-matrix-reorg
Perform matrix flattening and transposing.
-Matrix flattening tries to replace a m-dimensional matrix
-with its equivalent n-dimensional matrix, where n < m.
+Matrix flattening tries to replace an @math{m}-dimensional matrix
+with its equivalent @math{n}-dimensional matrix, where @math{n < m}.
This reduces the level of indirection needed for accessing the elements
of the matrix. The second optimization is matrix transposing that
attempts to change the order of the matrix's dimensions in order to
implies @option{-pthread}, and thus is only supported on targets
that have support for @option{-pthread}.
+@item -ftree-pta
+@opindex ftree-pta
+Perform function-local points-to analysis on trees. This flag is
+enabled by default at @option{-O} and higher.
+
@item -ftree-sra
@opindex ftree-sra
Perform scalar replacement of aggregates. This pass replaces structure
@item -fwhole-program
@opindex fwhole-program
-Assume that the current compilation unit represents whole program being
+Assume that the current compilation unit represents the whole program being
compiled. All public functions and variables with the exception of @code{main}
and those merged by attribute @code{externally_visible} become static functions
-and in a affect gets more aggressively optimized by interprocedural optimizers.
-While this option is equivalent to proper use of @code{static} keyword for
-programs consisting of single file, in combination with option
-@option{--combine} this flag can be used to compile most of smaller scale C
+and in effect are optimized more aggressively by interprocedural optimizers.
+While this option is equivalent to proper use of the @code{static} keyword for
+programs consisting of a single file, in combination with option
+@option{--combine} this flag can be used to compile many smaller scale C
programs since the functions and variables become local for the whole combined
compilation unit, not for the single source file itself.
-This option is not supported for Fortran programs.
+This option implies @option{-fwhole-file} for Fortran programs.
@item -fcprop-registers
@opindex fcprop-registers
@var{name} are given in the following table:
@table @gcctabopt
-@item sra-max-structure-size
-The maximum structure size, in bytes, at which the scalar replacement
-of aggregates (SRA) optimization will perform block copies. The
-default value, 0, implies that GCC will select the most appropriate
-size itself.
-
-@item sra-field-structure-ratio
-The threshold ratio (as a percentage) between instantiated fields and
-the complete structure size. We say that if the ratio of the number
-of bytes in instantiated fields to the number of bytes in the complete
-structure exceeds this parameter, then block copies are not used. The
-default is 75.
-
@item struct-reorg-cold-struct-ratio
The threshold ratio (as a percentage) between a structure frequency
and the frequency of the hottest structure in the program. This parameter
internal representation) in a single function that the tree inliner
will consider for inlining. This only affects functions declared
inline and methods implemented in a class declaration (C++).
-The default value is 450.
+The default value is 300.
@item max-inline-insns-auto
When you use @option{-finline-functions} (included in @option{-O3}),
by the compiler will be investigated. To those functions, a different
(more restrictive) limit compared to functions declared inline can
be applied.
-The default value is 90.
+The default value is 60.
@item large-function-insns
The limit specifying really large functions. For functions larger than this
whose probability exceeds given threshold (in percents). The default value is
10.
-@item inline-call-cost
-Specify cost of call instruction relative to simple arithmetics operations
-(having cost of 1). Increasing this cost disqualifies inlining of non-leaf
-functions and at the same time increases size of leaf function that is believed to
-reduce function size by being inlined. In effect it increases amount of
-inlining for code having large abstraction penalty (many functions that just
-pass the arguments to other functions) and decrease inlining for code with low
-abstraction penalty. The default value is 12.
+@item early-inlining-insns
+Specify growth that early inliner can make. In effect it increases amount of
+inlining for code having large abstraction penalty. The default value is 12.
+
+@item max-early-inliner-iterations
+@itemx max-early-inliner-iterations
+Limit of iterations of early inliner. This basically bounds number of nested
+indirect calls early inliner can resolve. Deeper chains are still handled by
+late inlining.
@item min-vect-loop-bound
The minimum number of iterations under which a loop will not get vectorized
@samp{arm10tdmi}, @samp{arm1020t}, @samp{arm1026ej-s},
@samp{arm10e}, @samp{arm1020e}, @samp{arm1022e},
@samp{arm1136j-s}, @samp{arm1136jf-s}, @samp{mpcore}, @samp{mpcorenovfp},
-@samp{arm1156t2-s}, @samp{arm1176jz-s}, @samp{arm1176jzf-s},
+@samp{arm1156t2-s}, @samp{arm1156t2f-s}, @samp{arm1176jz-s}, @samp{arm1176jzf-s},
@samp{cortex-a8}, @samp{cortex-a9},
@samp{cortex-r4}, @samp{cortex-r4f}, @samp{cortex-m3},
@samp{cortex-m1},
@item -mint8
@opindex mint8
Assume int to be 8 bit integer. This affects the sizes of all types: A
-char will be 1 byte, an int will be 1 byte, an long will be 2 bytes
+char will be 1 byte, an int will be 1 byte, a long will be 2 bytes
and long long will be 4 bytes. Please note that this option does not
comply to the C standards, but it will provide you with smaller code
size.
The Darwin tools vary in their behavior when presented with an ISA
mismatch. The assembler, @file{as}, will only permit instructions to
be used that are valid for the subtype of the file it is generating,
-so you cannot put 64-bit instructions in an @samp{ppc750} object file.
+so you cannot put 64-bit instructions in a @samp{ppc750} object file.
The linker for shared libraries, @file{/usr/bin/libtool}, will fail
and print an error if asked to create a shared library with a less
restrictive subtype than its input files (for instance, trying to put
In 64-bit mode, SAHF instruction is used to optimize @code{fmod}, @code{drem}
or @code{remainder} built-in functions: see @ref{Other Builtins} for details.
+@item -mmovbe
+@opindex mmovbe
+This option will enable GCC to use movbe instruction to implement
+@code{__builtin_bswap32} and @code{__builtin_bswap64}.
+
@item -mrecip
@opindex mrecip
This option will enable GCC to use RCPSS and RSQRTSS instructions (and their
Generate code for inline divides of floating point values
using the maximum throughput algorithm.
+@item -mno-inline-float-divide
+@opindex mno-inline-float-divide
+Do not generate inline code for divides of floating point values.
+
@item -minline-int-divide-min-latency
@opindex minline-int-divide-min-latency
Generate code for inline divides of integer values
Generate code for inline divides of integer values
using the maximum throughput algorithm.
+@item -mno-inline-int-divide
+@opindex mno-inline-int-divide
+Do not generate inline code for divides of integer values.
+
@item -minline-sqrt-min-latency
@opindex minline-sqrt-min-latency
Generate code for inline square roots
Generate code for inline square roots
using the maximum throughput algorithm.
+@item -mno-inline-sqrt
+@opindex mno-inline-sqrt
+Do not generate inline code for sqrt.
+
+@item -mfused-madd
+@itemx -mno-fused-madd
+@opindex mfused-madd
+@opindex mno-fused-madd
+Do (don't) generate code that uses the fused multiply/add or multiply/subtract
+instructions. The default is to use these instructions.
+
@item -mno-dwarf2-asm
@itemx -mdwarf2-asm
@opindex mno-dwarf2-asm
Tune the instruction scheduling for a particular CPU, Valid values are
itanium, itanium1, merced, itanium2, and mckinley.
-@item -mt
-@itemx -pthread
-@opindex mt
-@opindex pthread
-Add support for multithreading using the POSIX threads library. This
-option sets flags for both the preprocessor and linker. It does
-not affect the thread safety of object code produced by the compiler or
-that of libraries supplied with it. These are HP-UX specific flags.
-
@item -milp32
@itemx -mlp64
@opindex milp32
This is effective only with @option{-msched-control-spec} enabled.
The default is 'enable'.
-@item -msched-ldc
-@itemx -mno-sched-ldc
-@opindex msched-ldc
-@opindex mno-sched-ldc
-(En/Dis)able use of simple data speculation checks ld.c .
-If disabled, only chk.a instructions will be emitted to check
-data speculative loads.
-The default is 'enable'.
-
-@item -mno-sched-control-ldc
-@itemx -msched-control-ldc
-@opindex mno-sched-control-ldc
-@opindex msched-control-ldc
-(Dis/En)able use of ld.c instructions to check control speculative loads.
-If enabled, in case of control speculative load with no speculatively
-scheduled dependent instructions this load will be emitted as ld.sa and
-ld.c will be used to check it.
-The default is 'disable'.
-
-@item -mno-sched-spec-verbose
-@itemx -msched-spec-verbose
-@opindex mno-sched-spec-verbose
-@opindex msched-spec-verbose
-(Dis/En)able printing of the information about speculative motions.
-
@item -mno-sched-prefer-non-data-spec-insns
@itemx -msched-prefer-non-data-spec-insns
@opindex mno-sched-prefer-non-data-spec-insns
speculation a bit more conservative.
The default is 'disable'.
+@item -msched-spec-ldc
+@opindex msched-spec-ldc
+Use a simple data speculation check. This option is on by default.
+
+@item -msched-control-spec-ldc
+@opindex msched-spec-ldc
+Use a simple check for control speculation. This option is on by default.
+
+@item -msched-stop-bits-after-every-cycle
+@opindex msched-stop-bits-after-every-cycle
+Place a stop bit after every cycle when scheduling. This option is on
+by default.
+
+@item -msched-fp-mem-deps-zero-cost
+@opindex msched-fp-mem-deps-zero-cost
+Assume that floating-point stores and loads are not likely to cause a conflict
+when placed into the same instruction group. This option is disabled by
+default.
+
+@item -msel-sched-dont-check-control-spec
+@opindex msel-sched-dont-check-control-spec
+Generate checks for control speculation in selective scheduling.
+This flag is disabled by default.
+
+@item -msched-max-memory-insns=@var{max-insns}
+@opindex msched-max-memory-insns
+Limit on the number of memory insns per instruction group, giving lower
+priority to subsequent memory insns attempting to schedule in the same
+instruction group. Frequently useful to prevent cache bank conflicts.
+The default value is 1.
+
+@item -msched-max-memory-insns-hard-limit
+@opindex msched-max-memory-insns-hard-limit
+Disallow more than `msched-max-memory-insns' in instruction group.
+Otherwise, limit is `soft' meaning that we would prefer non-memory operations
+when limit is reached but may still schedule memory operations.
+
@end table
@node M32C Options
@multitable @columnfractions 0.20 0.80
@item @strong{Family} @tab @strong{@samp{-mcpu} arguments}
-@item @samp{51qe} @tab @samp{51qe}
+@item @samp{51} @tab @samp{51} @samp{51ac} @samp{51cn} @samp{51em} @samp{51qe}
@item @samp{5206} @tab @samp{5202} @samp{5204} @samp{5206}
@item @samp{5206e} @tab @samp{5206e}
@item @samp{5208} @tab @samp{5207} @samp{5208}
@item @samp{5216} @tab @samp{5214} @samp{5216}
@item @samp{52235} @tab @samp{52230} @samp{52231} @samp{52232} @samp{52233} @samp{52234} @samp{52235}
@item @samp{5225} @tab @samp{5224} @samp{5225}
+@item @samp{52259} @tab @samp{52252} @samp{52254} @samp{52255} @samp{52256} @samp{52258} @samp{52259}
@item @samp{5235} @tab @samp{5232} @samp{5233} @samp{5234} @samp{5235} @samp{523x}
@item @samp{5249} @tab @samp{5249}
@item @samp{5250} @tab @samp{5250}
@item @samp{5272} @tab @samp{5272}
@item @samp{5275} @tab @samp{5274} @samp{5275}
@item @samp{5282} @tab @samp{5280} @samp{5281} @samp{5282} @samp{528x}
+@item @samp{53017} @tab @samp{53011} @samp{53012} @samp{53013} @samp{53014} @samp{53015} @samp{53016} @samp{53017}
@item @samp{5307} @tab @samp{5307}
@item @samp{5329} @tab @samp{5327} @samp{5328} @samp{5329} @samp{532x}
@item @samp{5373} @tab @samp{5372} @samp{5373} @samp{537x}
specifies that a GUI application is to be generated by
instructing the linker to set the PE header subsystem type
appropriately.
+
+@item -mpe-aligned-commons
+@opindex mpe-aligned-commons
+This option is available for Cygwin and MinGW targets. It
+specifies that the GNU extension to the PE file format that
+permits the correct alignment of COMMON variables should be
+used when generating code. It will be enabled by default if
+GCC detects that the target assembler found during configuration
+supports the feature.
@end table
See also under @ref{i386 and x86-64 Options} for standard options.
name, such as @code{vector<int> blah(const vector<int> &)}, not the
internal mangled name (e.g., @code{_Z4blahRSt6vectorIiSaIiEE}). The
match is done on substrings: if the @var{sym} parameter is a substring
-of the function name, it is considered to be a match.
+of the function name, it is considered to be a match. For C99 and C++
+extended identifiers, the function name must be given in UTF-8, not
+using universal character names.
@item -fstack-check
@opindex fstack-check
OSDN Git Service
