@item C++ Language Options
@xref{C++ Dialect Options,,Options Controlling C++ Dialect}.
@gccoptlist{-fabi-version=@var{n} -fno-access-control -fcheck-new @gol
--fconserve-space -ffriend-injection @gol
+-fconserve-space -fconstexpr-depth=@var{n} -ffriend-injection @gol
-fno-elide-constructors @gol
-fno-enforce-eh-specs @gol
-ffor-scope -fno-for-scope -fno-gnu-keywords @gol
@xref{Language Independent Options,,Options to Control Diagnostic Messages Formatting}.
@gccoptlist{-fmessage-length=@var{n} @gol
-fdiagnostics-show-location=@r{[}once@r{|}every-line@r{]} @gol
--fdiagnostics-show-option}
+-fno-diagnostics-show-option}
@item Warning Options
@xref{Warning Options,,Options to Request or Suppress Warnings}.
-fcompare-debug@r{[}=@var{opts}@r{]} -fcompare-debug-second @gol
-feliminate-dwarf2-dups -feliminate-unused-debug-types @gol
-feliminate-unused-debug-symbols -femit-class-debug-always @gol
--fenable-icf-debug @gol
-fmem-report -fpre-ipa-mem-report -fpost-ipa-mem-report -fprofile-arcs @gol
-frandom-seed=@var{string} -fsched-verbose=@var{n} @gol
-fsel-sched-verbose -fsel-sched-dump-cfg -fsel-sched-pipelining-verbose @gol
@emph{Solaris 2 Options}
@gccoptlist{-mimpure-text -mno-impure-text @gol
--threads -pthreads -pthread}
+-pthreads -pthread}
@emph{SPARC Options}
@gccoptlist{-mcpu=@var{cpu-type} @gol
Version 4 implements a standard mangling for vector types.
+Version 5 corrects the mangling of attribute const/volatile on
+function pointer types, decltype of a plain decl, and use of a
+function parameter in the declaration of another parameter.
+
See also @option{-Wabi}.
@item -fno-access-control
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 -fconstexpr-depth=@var{n}
+@opindex fconstexpr-depth
+Set the maximum nested evaluation depth for C++0x constexpr functions
+to @var{n}. A limit is needed to detect endless recursion during
+constant expression evaluation. The minimum specified by the standard
+is 512.
+
@item -fno-deduce-init-list
@opindex fno-deduce-init-list
Disable deduction of a template type parameter as
@cindex Objective-C and Objective-C++ options, command line
@cindex options, Objective-C and Objective-C++
(NOTE: This manual does not describe the Objective-C and Objective-C++
-languages themselves. See @xref{Standards,,Language Standards
+languages themselves. @xref{Standards,,Language Standards
Supported by GCC}, for references.)
This section describes the command-line options that are only meaningful
prefix) for physical lines that result from the process of breaking
a message which is too long to fit on a single line.
-@item -fdiagnostics-show-option
+@item -fno-diagnostics-show-option
+@opindex fno-diagnostics-show-option
@opindex fdiagnostics-show-option
-This option instructs the diagnostic machinery to add text to each
-diagnostic emitted, which indicates which command line option directly
-controls that diagnostic, when such an option is known to the
-diagnostic machinery.
+By default, each diagnostic emitted includes text which indicates the
+command line option that directly controls the diagnostic (if such an
+option is known to the diagnostic machinery). Specifying the
+@option{-fno-diagnostics-show-option} flag suppresses that behavior.
@item -Wcoverage-mismatch
@opindex Wcoverage-mismatch
negative form, to be used to negate @option{-Werror} for specific
warnings, for example @option{-Wno-error=switch} makes
@option{-Wswitch} warnings not be errors, even when @option{-Werror}
-is in effect. You can use the @option{-fdiagnostics-show-option}
-option to have each controllable warning amended with the option which
-controls it, to determine what to use with this option.
+is in effect.
+
+The warning message for each controllable warning includes the
+option which controls the warning. That option can then be used with
+@option{-Werror=} and @option{-Wno-error=} as described above.
+(Printing of the option in the warning message can be disabled using the
+@option{-fno-diagnostics-show-option} flag.)
Note that specifying @option{-Werror=}@var{foo} automatically implies
@option{-W}@var{foo}. However, @option{-Wno-error=}@var{foo} does not
This option works only with DWARF 2.
-@item -fenable-icf-debug
-@opindex fenable-icf-debug
-Generate additional debug information to support identical code folding (ICF).
-This option only works with DWARF version 2 or higher.
-
@item -fno-merge-debug-strings
@opindex fmerge-debug-strings
@opindex fno-merge-debug-strings
@item -fuse-linker-plugin
Enables the use of linker plugin during link time optimization. This option
-relies on the linker plugin support in linker that is available in @code{gold}
-or in GNU ld 2.21.51 or newer..
+relies on the linker plugin support in linker that is available in gold
+or in GNU ld 2.21 or newer.
This option enables the extraction of object files with GIMPLE bytecode out of
library archives. This improves the quality of optimization by exposing more
@option{-flto} for a description on the effect of this flag and how to use it.
Enabled by default when LTO support in GCC is enabled and GCC was compiled
-with linker supporting plugins (GNU ld or @code{gold}).
+with a linker supporting plugins (GNU ld 2.21 or newer or gold).
@item -fcompare-elim
@opindex fcompare-elim
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 300.
+The default value is 400.
@item max-inline-insns-auto
When you use @option{-finline-functions} (included in @option{-O3}),
These switches are supported in addition to the above on Solaris 2:
@table @gcctabopt
-@item -threads
-@opindex threads
-Add support for multithreading using the Solaris threads library. This
-option sets flags for both the preprocessor and linker. This option does
-not affect the thread safety of object code produced by the compiler or
-that of libraries supplied with it.
-
@item -pthreads
@opindex pthreads
Add support for multithreading using the POSIX threads library. This
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