it is used, often the wastage is less than the considerable space occupied
by a long symbol name in the export table which is typical when using
templates and namespaces. For even more savings, combine with the
-@code{-fvisibility=hidden} switch.
+@option{-fvisibility=hidden} switch.
@item -fno-weak
@opindex fno-weak
every method in the protocol that is not implemented by the class. The
default behavior is to issue a warning for every method not explicitly
implemented in the class, even if a method implementation is inherited
-from the superclass. If you use the @code{-Wno-protocol} option, then
+from the superclass. If you use the @option{-Wno-protocol} option, then
methods inherited from the superclass are considered to be implemented,
and no warning is issued for them.
during compilation. Because these checks scan the method table only at
the end of compilation, these warnings are not produced if the final
stage of compilation is not reached, for example because an error is
-found during compilation, or because the @code{-fsyntax-only} option is
+found during compilation, or because the @option{-fsyntax-only} option is
being used.
@item -Wundeclared-selector
@code{@@interface} or @code{@@protocol} declaration, or implicitly in
an @code{@@implementation} section. This option always performs its
checks as soon as a @code{@@selector(@dots{})} expression is found,
-while @code{-Wselector} only performs its checks in the final stage of
+while @option{-Wselector} only performs its checks in the final stage of
compilation. This also enforces the coding style convention
that methods and selectors must be declared before being used.
trace formation.
This mode should produce faster but significantly longer programs. Also
-without @code{-fbranch-probabilities} the traces constructed may not match the
-reality and hurt the performance. This only makes
+without @option{-fbranch-probabilities} the traces constructed may not
+match the reality and hurt the performance. This only makes
sense when scheduling after register allocation, i.e.@: with
@option{-fschedule-insns2} or at @option{-O2} or higher.
@item -ftree-pre
Perform Partial Redundancy Elimination (PRE) on trees. This flag is
-enabled by default at -O and higher.
+enabled by default at @option{-O} and higher.
@item -ftree-fre
Perform Full Redundancy Elimination (FRE) on trees. The difference
between FRE and PRE is that FRE only considers expressions
that are computed on all paths leading to the redundant computation.
This analysis faster than PRE, though it exposes fewer redundancies.
-This flag is enabled by default at -O and higher.
+This flag is enabled by default at @option{-O} and higher.
@item -ftree-ccp
Perform sparse conditional constant propagation (CCP) on trees. This flag
-is enabled by default at -O and higher.
+is enabled by default at @option{-O} and higher.
@item -ftree-dce
Perform dead code elimination (DCE) on trees. This flag is enabled by
-default at -O and higher.
+default at @option{-O} and higher.
@item -ftree-dominator-opts
Perform dead code elimination (DCE) on trees. This flag is enabled by
-default at -O and higher.
+default at @option{-O} and higher.
@item -ftree-ch
Perform loop header copying on trees. This is beneficial since it increases
effectiveness of code motion optimizations. It also saves one jump. This flag
-is enabled by default at -O and higher. It is not enabled for -Os, since it
-usually increases code size.
+is enabled by default at @option{-O} and higher. It is not enabled
+for @option{-Os}, since it usually increases code size.
@item -ftree-loop-optimize
-Perform loop optimizations on trees. This flag is enabled by default at -O
-and higher.
+Perform loop optimizations on trees. This flag is enabled by default
+at @option{-O} and higher.
@item -ftree-loop-linear
Perform linear loop transformations on tree. This flag can improve cache
@item -ftree-sra
Perform scalar replacement of aggregates. This pass replaces structure
references with scalars to prevent committing structures to memory too
-early. This flag is enabled by default at -O and higher.
+early. This flag is enabled by default at @option{-O} and higher.
@item -ftree-copyrename
Perform copy renaming on trees. This pass attempts to rename compiler
temporaries to other variables at copy locations, usually resulting in
variable names which more closely resemble the original variables. This flag
-is enabled by default at -O and higher.
+is enabled by default at @option{-O} and higher.
@item -ftree-ter
Perform temporary expression replacement during the SSA->normal phase. Single
use/single def temporaries are replaced at their use location with their
defining expression. This results in non-GIMPLE code, but gives the expanders
much more complex trees to work on resulting in better RTL generation. This is
-enabled by default at -O and higher.
+enabled by default at @option{-O} and higher.
@item -ftree-lrs
Perform live range splitting during the SSA->normal phase. Distinct live
ranges of a variable are split into unique variables, allowing for better
-optimization later. This is enabled by default at -O and higher.
+optimization later. This is enabled by default at @option{-O} and higher.
@item -ftree-vectorize
Perform loop vectorization on trees.
Enable options usually used for instrumenting application to produce
profile useful for later recompilation with profile feedback based
-optimization. You must use @code{-fprofile-generate} both when
+optimization. You must use @option{-fprofile-generate} both when
compiling and when linking your program.
The following options are enabled: @code{-fprofile-arcs}, @code{-fprofile-values}, @code{-fvpt}.
@item -mn
@opindex mn
Generate code for the H8S and H8/300H in the normal mode. This switch
-must be used either with -mh or -ms.
+must be used either with @option{-mh} or @option{-ms}.
@item -ms2600
@opindex ms2600
@item -msep-data
Generate code that allows the data segment to be located in a different
area of memory from the text segment. This allows for execute in place in
-an environment without virtual memory management. This option implies -fPIC.
+an environment without virtual memory management. This option implies
+@option{-fPIC}.
@item -mno-sep-data
Generate code that assumes that the data segment follows the text segment.
@item -mid-shared-library
Generate code that supports shared libraries via the library ID method.
This allows for execute in place and shared libraries in an environment
-without virtual memory management. This option implies -fPIC.
+without virtual memory management. This option implies @option{-fPIC}.
@item -mno-id-shared-library
Generate code that doesn't assume ID based shared libraries are being used.
must be the @code{-opt} style. It is the intention of this macro to
provide a mechanism for substitution that affects the multilibs chosen,
such as one option that enables many options, some of which select
-multilibs. Example nonsensical definition, where @code{-malt-abi},
-@code{-EB}, and @code{-mspoo} cause different multilibs to be chosen:
+multilibs. Example nonsensical definition, where @option{-malt-abi},
+@option{-EB}, and @option{-mspoo} cause different multilibs to be chosen:
@smallexample
#define TARGET_OPTION_TRANSLATE_TABLE \
By default, if @code{ENABLE_SHARED_LIBGCC} is defined, the
@code{LIBGCC_SPEC} is not directly used by the driver program but is
instead modified to refer to different versions of @file{libgcc.a}
-depending on the values of the command line flags @code{-static},
-@code{-shared}, @code{-static-libgcc}, and @code{-shared-libgcc}. On
+depending on the values of the command line flags @option{-static},
+@option{-shared}, @option{-static-libgcc}, and @option{-shared-libgcc}. On
targets where these modifications are inappropriate, define
@code{REAL_LIBGCC_SPEC} instead. @code{REAL_LIBGCC_SPEC} tells the
driver how to place a reference to @file{libgcc} on the link command
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