in many functions. @strong{It also makes debugging impossible on
some machines.}
-@ifset INTERNALS
-On some machines, such as the VAX, this flag has no effect, because
-the standard calling sequence automatically handles the frame pointer
-and nothing is saved by pretending it doesn't exist. The
-machine-description macro @code{FRAME_POINTER_REQUIRED} controls
-whether a target machine supports this flag. @xref{Registers}.
-@end ifset
-@ifclear INTERNALS
On some machines, such as the VAX, this flag has no effect, because
the standard calling sequence automatically handles the frame pointer
and nothing is saved by pretending it doesn't exist. The
machine-description macro @code{FRAME_POINTER_REQUIRED} controls
whether a target machine supports this flag. @xref{Registers,,Register
-Usage, gcc.info, Using and Porting GCC}.
-@end ifclear
+Usage, gccint, GNU Compiler Collection (GCC) Internals}.
@item -foptimize-sibling-calls
@opindex foptimize-sibling-calls
structure of the generated code, so you must use the same source code
and the same optimization options for both compilations.
-@ifset INTERNALS
With @option{-fbranch-probabilities}, GCC puts a @samp{REG_EXEC_COUNT}
note on the first instruction of each basic block, and a
@samp{REG_BR_PROB} note on each @samp{JUMP_INSN} and @samp{CALL_INSN}.
used in one place: in @file{reorg.c}, instead of guessing which path a
branch is mostly to take, the @samp{REG_BR_PROB} values are used to
exactly determine which path is taken more often.
-@end ifset
@item -fno-guess-branch-probability
@opindex fno-guess-branch-probability
@}
@end example
-@ifset INTERNALS
Every language that wishes to perform language-specific alias analysis
should define a function that computes, given an @code{tree}
node, an alias set for the node. Nodes in different alias sets are not
allowed to alias. For an example, see the C front-end function
@code{c_get_alias_set}.
-@end ifset
@item -falign-functions
@itemx -falign-functions=@var{n}
@option{-nodefaultlibs} is @file{libgcc.a}, a library of internal subroutines
that GCC uses to overcome shortcomings of particular machines, or special
needs for some languages.
-@ifset INTERNALS
-(@xref{Interface,,Interfacing to GCC Output}, for more discussion of
-@file{libgcc.a}.)
-@end ifset
-@ifclear INTERNALS
-(@xref{Interface,,Interfacing to GCC Output,gcc.info,Porting GCC},
+(@xref{Interface,,Interfacing to GCC Output,gccint,GNU Compiler
+Collection (GCC) Internals},
for more discussion of @file{libgcc.a}.)
-@end ifclear
In most cases, you need @file{libgcc.a} even when you want to avoid
other standard libraries. In other words, when you specify @option{-nostdlib}
or @option{-nodefaultlibs} you should usually specify @option{-lgcc} as well.
This ensures that you have no unresolved references to internal GCC
library subroutines. (For example, @samp{__main}, used to ensure C++
-constructors will be called; @pxref{Collect2,,@command{collect2}}.)
+constructors will be called; @pxref{Collect2,,@code{collect2}, gccint,
+GNU Compiler Collection (GCC) Internals}.)
@item -s
@opindex s
options, usually for compatibility with other compilers on the same
platform.
-@ifset INTERNALS
These options are defined by the macro @code{TARGET_SWITCHES} in the
machine description. The default for the options is also defined by
that macro, which enables you to change the defaults.
-@end ifset
@menu
* M680x0 Options::
@samp{_flush_func} or @samp{__cpu_flush}.
@end table
-@ifset INTERNALS
These options are defined by the macro
@code{TARGET_SWITCHES} in the machine description. The default for the
options is also defined by that macro, which enables you to change the
defaults.
-@end ifset
@node i386 and x86-64 Options
@subsection Intel 386 and AMD x86-64 Options
when searching for various kinds of files. Some are used to specify other
aspects of the compilation environment.
-@ifclear INTERNALS
-Note that you can also specify places to search using options such as
-@option{-B}, @option{-I} and @option{-L} (@pxref{Directory Options}). These
-take precedence over places specified using environment variables, which
-in turn take precedence over those specified by the configuration of GCC@.
-
-@end ifclear
-@ifset INTERNALS
Note that you can also specify places to search using options such as
@option{-B}, @option{-I} and @option{-L} (@pxref{Directory Options}). These
take precedence over places specified using environment variables, which
in turn take precedence over those specified by the configuration of GCC@.
-@xref{Driver}.
-@end ifset
+@xref{Driver,, Controlling the Compilation Driver @file{gcc}, gccint,
+GNU Compiler Collection (GCC) Internals}.
@table @env
@item LANG
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