-Wparentheses -Wpointer-arith -Wno-pointer-to-int-cast @gol
-Wredundant-decls @gol
-Wreturn-type -Wsequence-point -Wshadow @gol
--Wsign-compare -Wstrict-aliasing -Wstrict-aliasing=2 @gol
+-Wsign-compare -Wstack-protector @gol
+-Wstrict-aliasing -Wstrict-aliasing=2 @gol
-Wswitch -Wswitch-default -Wswitch-enum @gol
-Wsystem-headers -Wtrigraphs -Wundef -Wuninitialized @gol
-Wunknown-pragmas -Wno-pragmas -Wunreachable-code @gol
-Wunused -Wunused-function -Wunused-label -Wunused-parameter @gol
--Wunused-value -Wunused-variable -Wwrite-strings @gol
--Wvariadic-macros}
+-Wunused-value -Wunused-variable -Wvariadic-macros @gol
+-Wwrite-strings}
@item C-only Warning Options
@gccoptlist{-Wbad-function-cast -Wmissing-declarations @gol
-frounding-math -fschedule-insns -fschedule-insns2 @gol
-fno-sched-interblock -fno-sched-spec -fsched-spec-load @gol
-fsched-spec-load-dangerous @gol
--fsched-stalled-insns=@var{n} -sched-stalled-insns-dep=@var{n} @gol
+-fsched-stalled-insns=@var{n} -fsched-stalled-insns-dep=@var{n} @gol
-fsched2-use-superblocks @gol
-fsched2-use-traces -freschedule-modulo-scheduled-loops @gol
-fsignaling-nans -fsingle-precision-constant @gol
+-fstack-protector -fstack-protector-all @gol
-fstrength-reduce -fstrict-aliasing -ftracer -fthread-jumps @gol
-funroll-all-loops -funroll-loops -fpeel-loops @gol
-fsplit-ivs-in-unroller -funswitch-loops @gol
-melf -maout -melinux -mlinux -sim -sim2 @gol
-mmul-bug-workaround -mno-mul-bug-workaround}
+@emph{CRX Options}
+@gccoptlist{-mmac -mpush-args}
+
@emph{Darwin Options}
@gccoptlist{-all_load -allowable_client -arch -arch_errors_fatal @gol
-arch_only -bind_at_load -bundle -bundle_loader @gol
@itemx @var{file}.f95
Fortran 90/95 source code which should not be preprocessed.
+@item @var{file}.F90
+@itemx @var{file}.F95
+Fortran 90/95 source code which must be preprocessed (with the
+traditional preprocessor).
+
@c FIXME: Descriptions of Java file types.
@c @var{file}.java
@c @var{file}.class
@item -Wold-style-cast @r{(C++ only)}
@opindex Wold-style-cast
Warn if an old-style (C-style) cast to a non-void type is used within
-a C++ program. The new-style casts (@samp{static_cast},
-@samp{reinterpret_cast}, and @samp{const_cast}) are less vulnerable to
-unintended effects and much easier to search for.
+a C++ program. The new-style casts (@samp{dynamic_cast},
+@samp{static_cast}, @samp{reinterpret_cast}, and @samp{const_cast}) are
+less vulnerable to unintended effects and much easier to search for.
@item -Woverloaded-virtual @r{(C++ only)}
@opindex Woverloaded-virtual
@item -Werror
@opindex Werror
Make all warnings into errors.
+
+@item -Wstack-protector
+This option is only active when @option{-fstack-protector} is active. It
+warns about functions that will not be protected against stack smashing.
+
@end table
@node Debugging Options
When performing branch target register load optimization, don't reuse
branch target registers in within any basic block.
+@item -fstack-protector
+Emit extra code to check for buffer overflows, such as stack smashing
+attacks. This is done by adding a guard variable to functions with
+vulnerable objects. This includes functions that call alloca, and
+functions with buffers larger than 8 bytes. The guards are initialized
+when a function is entered and then checked when the function exits.
+If a guard check fails, an error message is printed and the program exits.
+
+@item -fstack-protector-all
+Like @option{-fstack-protector} except that all functions are protected.
+
@item --param @var{name}=@var{value}
@opindex param
In some places, GCC uses various constants to control the amount of
SSA updater switches to a full update for those symbols. The default
ratio is 3.
+@item ssp-buffer-size
+The minimum size of buffers (i.e. arrays) that will receive stack smashing
+protection when @option{-fstack-protection} is used.
+
@end table
@end table
The value to use for @var{machine} is the same as was specified as the
machine type when configuring GCC as a cross-compiler. For
example, if a cross-compiler was configured with @samp{configure
-i386v}, meaning to compile for an 80386 running System V, then you
-would specify @option{-b i386v} to run that cross compiler.
+arm-elf}, meaning to compile for an arm processor with elf binaries,
+then you would specify @option{-b arm-elf} to run that cross compiler.
+Because there are other options beginning with @option{-b}, the
+configuration must contain a hyphen.
@item -V @var{version}
@opindex V
The argument @var{version} specifies which version of GCC to run.
This is useful when multiple versions are installed. For example,
-@var{version} might be @samp{2.0}, meaning to run GCC version 2.0.
+@var{version} might be @samp{4.0}, meaning to run GCC version 4.0.
@end table
The @option{-V} and @option{-b} options work by running the
* AVR Options::
* Blackfin Options::
* CRIS Options::
+* CRX Options::
* Darwin Options::
* DEC Alpha Options::
* DEC Alpha/VMS Options::
0x40000000 and zero-initialized data at 0x80000000.
@end table
+@node CRX Options
+@subsection CRX Options
+@cindex CRX Options
+
+These options are defined specifically for the CRX ports.
+
+@table @gcctabopt
+
+@item -mmac
+@opindex mmac
+Enable the use of multiply-accumulate instructions. Disabled by default.
+
+@item -mpush-args
+@opindex mpush-args
+Push instructions will be used to pass outgoing arguments when functions
+are called. Enabled by default.
+@end table
+
@node Darwin Options
@subsection Darwin Options
@cindex Darwin options
@opindex mlarge-data-threshold=@var{number}
When @option{-mcmodel=medium} is specified, the data greater than
@var{threshold} are placed in large data section. This value must be the
-same across all object linked into the binarry and defaults to 65535.
+same across all object linked into the binary and defaults to 65535.
@item -msvr3-shlib
@itemx -mno-svr3-shlib
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