-ftest-coverage -ftime-report -fvar-tracking @gol
-fvar-tracking-assigments -fvar-tracking-assignments-toggle @gol
-g -g@var{level} -gtoggle -gcoff -gdwarf-@var{version} @gol
--ggdb -gstabs -gstabs+ -gvms -gxcoff -gxcoff+ @gol
+-ggdb -gstabs -gstabs+ -gstrict-dwarf -gno-strict-dwarf @gol
+-gvms -gxcoff -gxcoff+ @gol
-fno-merge-debug-strings -fno-dwarf2-cfi-asm @gol
-fdebug-prefix-map=@var{old}=@var{new} @gol
-femit-struct-debug-baseonly -femit-struct-debug-reduced @gol
-fcse-follow-jumps -fcse-skip-blocks -fcx-fortran-rules -fcx-limited-range @gol
-fdata-sections -fdce -fdce @gol
-fdelayed-branch -fdelete-null-pointer-checks -fdse -fdse @gol
--fearly-inlining -fexpensive-optimizations -ffast-math @gol
+-fearly-inlining -fipa-sra -fexpensive-optimizations -ffast-math @gol
-ffinite-math-only -ffloat-store -fexcess-precision=@var{style} @gol
-fforward-propagate -ffunction-sections @gol
-fgcse -fgcse-after-reload -fgcse-las -fgcse-lm @gol
-mflush-func=@var{func} -mno-flush-func @gol
-mbranch-cost=@var{num} -mbranch-likely -mno-branch-likely @gol
-mfp-exceptions -mno-fp-exceptions @gol
--mvr4130-align -mno-vr4130-align -msynci -mno-synci}
+-mvr4130-align -mno-vr4130-align -msynci -mno-synci @gol
+-mrelax-pic-calls -mno-relax-pic-calls}
@emph{MMIX Options}
@gccoptlist{-mlibfuncs -mno-libfuncs -mepsilon -mno-epsilon -mabi=gnu @gol
This option is no longer useful on most targets, now that support has
been added for putting variables into BSS without making them common.
+@item -fno-deduce-init-list
+@opindex fno-deduce-init-list
+Disable deduction of a template type parameter as
+std::initializer_list from a brace-enclosed initializer list, i.e.
+
+@smallexample
+template <class T> auto forward(T t) -> decltype (realfn (t))
+@{
+ return realfn (t);
+@}
+
+void f()
+@{
+ forward(@{1,2@}); // call forward<std::initializer_list<int>>
+@}
+@end smallexample
+
+This option is present because this deduction is an extension to the
+current specification in the C++0x working draft, and there was
+some concern about potential overload resolution problems.
+
@item -ffriend-injection
@opindex ffriend-injection
Inject friend functions into the enclosing namespace, so that they are
@option{-Wnonnull} is included in @option{-Wall} and @option{-Wformat}. It
can be disabled with the @option{-Wno-nonnull} option.
-@item -Wjump-misses-init @r{(C, Objective-C only)}
-@opindex Wjump-misses-init
-@opindex Wno-jump-misses-init
-Warn if a @code{goto} statement or a @code{switch} statement jumps
-forward across the initialization of a variable, or jumps backward to a
-label after the variable has been initialized. This only warns about
-variables which are initialized when they are declared. This warning is
-only supported for C and Objective C; in C++ this sort of branch is an
-error in any case.
-
-@option{-Wjump-misses-init} is included in @option{-Wall} and
-@option{-Wc++-compat}. It can be disabled with the
-@option{-Wno-jump-misses-init} option.
-
@item -Winit-self @r{(C, C++, Objective-C and Objective-C++ only)}
@opindex Winit-self
@opindex Wno-init-self
this warning is enabled by default. In C this warning is enabled by
@option{-Wall}.
+@item -Wjump-misses-init @r{(C, Objective-C only)}
+@opindex Wjump-misses-init
+@opindex Wno-jump-misses-init
+Warn if a @code{goto} statement or a @code{switch} statement jumps
+forward across the initialization of a variable, or jumps backward to a
+label after the variable has been initialized. This only warns about
+variables which are initialized when they are declared. This warning is
+only supported for C and Objective C; in C++ this sort of branch is an
+error in any case.
+
+@option{-Wjump-misses-init} is included in @option{-Wc++-compat}. It
+can be disabled with the @option{-Wno-jump-misses-init} option.
+
@item -Wsign-compare
@opindex Wsign-compare
@opindex Wno-sign-compare
Version 4 may require GDB 7.0 and @option{-fvar-tracking-assignments}
for maximum benefit.
+@item -gstrict-dwarf
+@opindex gstrict-dwarf
+Disallow using extensions of later DWARF standard version than selected
+with @option{-gdwarf-@var{version}}. On most targets using non-conflicting
+DWARF extensions from later standard versions is allowed.
+
+@item -gno-strict-dwarf
+@opindex gno-strict-dwarf
+Allow using extensions of later DWARF standard version than selected with
+@option{-gdwarf-@var{version}}.
+
@item -gvms
@opindex gvms
Produce debugging information in VMS debug format (if that is
-fgcse -fgcse-lm @gol
-finline-small-functions @gol
-findirect-inlining @gol
+-fipa-sra @gol
-foptimize-sibling-calls @gol
-fpeephole2 @gol
-fregmove @gol
Enabled by default.
+@item -fipa-sra
+@opindex fipa-sra
+Perform interprocedural scalar replacement of aggregates, removal of
+unused parameters and replacement of parameters passed by reference
+by parameters passed by value.
+
+Enabled at levels @option{-O2}, @option{-O3} and @option{-Os}.
+
@item -finline-limit=@var{n}
@opindex finline-limit
By default, GCC limits the size of functions that can be inlined. This flag
@item -fstrict-aliasing
@opindex fstrict-aliasing
-Allows the compiler to assume the strictest aliasing rules applicable to
+Allow the compiler to assume the strictest aliasing rules applicable to
the language being compiled. For C (and C++), this activates
optimizations based on the type of expressions. In particular, an
object of one type is assumed never to reside at the same address as an
@};
int f() @{
- a_union t;
+ union a_union t;
t.d = 3.0;
return t.i;
@}
implementation}. However, this code might not:
@smallexample
int f() @{
- a_union t;
+ union a_union t;
int* ip;
t.d = 3.0;
ip = &t.i;
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 60.
+The default value is 50.
@item large-function-insns
The limit specifying really large functions. For functions larger than this
@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.
+inlining for code having large abstraction penalty. The default value is 8.
@item max-early-inliner-iterations
@itemx max-early-inliner-iterations
@option{-fvar-tracking-assignments}, but debug insns may get
(non-overlapping) uids above it if the reserved range is exhausted.
+@item ipa-sra-ptr-growth-factor
+IPA-SRA will replace a pointer to an aggregate with one or more new
+parameters only when their cumulative size is less or equal to
+@option{ipa-sra-ptr-growth-factor} times the size of the original
+pointer parameter.
+
@end table
@end table
@item %s
Current argument is the name of a library or startup file of some sort.
Search for that file in a standard list of directories and substitute
-the full name found.
+the full name found. The current working directory is included in the
+list of directories scanned.
+
+@item %T
+Current argument is the name of a linker script. Search for that file
+in the current list of directories to scan for libraries. If the file
+is located insert a @option{--script} option into the command line
+followed by the full path name found. If the file is not found then
+generate an error message. Note: the current working directory is not
+searched.
@item %e@var{str}
Print @var{str} as an error message. @var{str} is terminated by a newline.
@samp{bf527}, @samp{bf531}, @samp{bf532}, @samp{bf533},
@samp{bf534}, @samp{bf536}, @samp{bf537}, @samp{bf538}, @samp{bf539},
@samp{bf542}, @samp{bf544}, @samp{bf547}, @samp{bf548}, @samp{bf549},
+@samp{bf542m}, @samp{bf544m}, @samp{bf547m}, @samp{bf548m}, @samp{bf549m},
@samp{bf561}.
The optional @var{sirevision} specifies the silicon revision of the target
Blackfin processor. Any workarounds available for the targeted silicon revision
to use @code{synci}. However, on many multi-core (SMP) systems, it
will not invalidate the instruction caches on all cores and may lead
to undefined behavior.
+
+@item -mrelax-pic-calls
+@itemx -mno-relax-pic-calls
+@opindex mrelax-pic-calls
+Try to turn PIC calls that are normally dispatched via register
+@code{$25} into direct calls. This is only possible if the linker can
+resolve the destination at link-time and if the destination is within
+range for a direct call.
+
+@option{-mrelax-pic-calls} is the default if GCC was configured to use
+an assembler and a linker that supports the @code{.reloc} assembly
+directive and @code{-mexplicit-relocs} is in effect. With
+@code{-mno-explicit-relocs}, this optimization can be performed by the
+assembler and the linker alone without help from the compiler.
@end table
@node MMIX Options
@samp{860}, @samp{970}, @samp{8540}, @samp{e300c2}, @samp{e300c3},
@samp{e500mc}, @samp{ec603e}, @samp{G3}, @samp{G4}, @samp{G5},
@samp{power}, @samp{power2}, @samp{power3}, @samp{power4},
-@samp{power5}, @samp{power5+}, @samp{power6}, @samp{power6x}, @samp{power7}
+@samp{power5}, @samp{power5+}, @samp{power6}, @samp{power6x}, @samp{power7},
@samp{common}, @samp{powerpc}, @samp{powerpc64}, @samp{rios},
@samp{rios1}, @samp{rios2}, @samp{rsc}, and @samp{rs64}.
OSDN Git Service
