@setfilename gdc.info
@settitle The GNU D Compiler
+@c Create a separate index for command line options
+@defcodeindex op
@c Merge the standard indexes into a single one.
@syncodeindex fn cp
@syncodeindex vr cp
package documentation, see @uref{https://dlang.org/}.
@menu
+* Invoking gdc:: How to run gdc.
* Copying:: The GNU General Public License.
* GNU Free Documentation License::
How you can share and copy this manual.
-* Invoking gdc:: How to run gdc.
-* Index:: Index.
+* Option Index:: Index of command line options.
+* Keyword Index:: Index of concepts.
@end menu
-
-@include gpl_v3.texi
-
-@include fdl.texi
-
-
@node Invoking gdc
@chapter Invoking gdc
@table @gcctabopt
@item -fall-instantiations
-@cindex @option{-fall-instantiations}
-@cindex @option{-fno-all-instantiations}
+@opindex fall-instantiations
+@opindex fno-all-instantiations
Generate code for all template instantiations. The default template emission
strategy is to not generate code for declarations that were either
instantiated speculatively, such as from @code{__traits(compiles, ...)}, or
that come from an imported module not being compiled.
@item -fno-assert
-@cindex @option{-fassert}
-@cindex @option{-fno-assert}
+@opindex fassert
+@opindex fno-assert
Turn off code generation for @code{assert} contracts.
@item -fno-bounds-check
-@cindex @option{-fbounds-check}
-@cindex @option{-fno-bounds-check}
+@opindex fbounds-check
+@opindex fno-bounds-check
Turns off array bounds checking for all functions, which can improve
performance for code that uses arrays extensively. Note that this
can result in unpredictable behavior if the code in question actually
if you are sure that your code never throws a @code{RangeError}.
@item -fbounds-check=@var{value}
-@cindex @option{-fbounds-check=}
+@opindex fbounds-check=
An alternative to @option{-fbounds-check} that allows more control
as to where bounds checking is turned on or off. The following values
are supported:
@end table
@item -fno-builtin
-@cindex @option{-fbuiltin}
-@cindex @option{-fno-builtin}
+@opindex fbuiltin
+@opindex fno-builtin
Don't recognize built-in functions unless they begin with the prefix
@samp{__builtin_}. By default, the compiler will recognize when a
function in the @code{core.stdc} package is a built-in function.
@item -fcheckaction=@var{value}
-@cindex @option{-fcheckaction}
+@opindex fcheckaction
This option controls what code is generated on an assertion, bounds check, or
final switch failure. The following values are supported:
@item -fdebug
@item -fdebug=@var{value}
-@cindex @option{-fdebug}
-@cindex @option{-fno-debug}
+@opindex fdebug
+@opindex fno-debug
Turn on compilation of conditional @code{debug} code into the program.
The @option{-fdebug} option itself sets the debug level to @code{1},
while @option{-fdebug=} enables @code{debug} code that are identified
@end table
@item -fno-druntime
-@cindex @option{-fdruntime}
-@cindex @option{-fno-druntime}
+@opindex fdruntime
+@opindex fno-druntime
Implements @uref{https://dlang.org/spec/betterc.html}. Assumes that
compilation targets an environment without a D runtime library.
@end example
@item -fextern-std=@var{standard}
-@cindex @option{-fextern-std}
+@opindex fextern-std
Sets the C++ name mangling compatibility to the version identified by
@var{standard}. The following values are supported:
@end table
@item -fno-invariants
-@cindex @option{-finvariants}
-@cindex @option{-fno-invariants}
+@opindex finvariants
+@opindex fno-invariants
Turns off code generation for class @code{invariant} contracts.
@item -fmain
-@cindex @option{-fmain}
+@opindex fmain
Generates a default @code{main()} function when compiling. This is useful when
unittesting a library, as it enables running the unittests in a library without
having to manually define an entry-point function. This option does nothing
when @code{main} is already defined in user code.
@item -fno-moduleinfo
-@cindex @option{-fmoduleinfo}
-@cindex @option{-fno-moduleinfo}
+@opindex fmoduleinfo
+@opindex fno-moduleinfo
Turns off generation of the @code{ModuleInfo} and related functions
that would become unreferenced without it, which may allow linking
to programs not written in D. Functions that are not be generated
functions for dynamically linked code.
@item -fonly=@var{filename}
-@cindex @option{-fonly}
+@opindex fonly
Tells the compiler to parse and run semantic analysis on all modules
on the command line, but only generate code for the module specified
by @var{filename}.
@item -fno-postconditions
-@cindex @option{-fpostconditions}
-@cindex @option{-fno-postconditions}
+@opindex fpostconditions
+@opindex fno-postconditions
Turns off code generation for postcondition @code{out} contracts.
@item -fno-preconditions
-@cindex @option{-fpreconditions}
-@cindex @option{-fno-preconditions}
+@opindex fpreconditions
+@opindex fno-preconditions
Turns off code generation for precondition @code{in} contracts.
@item -fpreview=@var{id}
-@cindex @option{-fpreview}
+@opindex fpreview
Turns on an upcoming D language change identified by @var{id}. The following
values are supported:
@end table
@item -frelease
-@cindex @option{-frelease}
-@cindex @option{-fno-release}
+@opindex frelease
+@opindex fno-release
Turns on compiling in release mode, which means not emitting runtime
checks for contracts and asserts. Array bounds checking is not done
for @code{@@system} and @code{@@trusted} functions, and assertion
@end example
@item -frevert=
-@cindex @option{-frevert}
+@opindex frevert
Turns off a D language feature identified by @var{id}. The following values
are supported:
@end table
@item -fno-rtti
-@cindex @option{-frtti}
-@cindex @option{-fno-rtti}
+@opindex frtti
+@opindex fno-rtti
Turns off generation of run-time type information for all user defined types.
Any code that uses features of the language that require access to this
information will result in an error.
@item -fno-switch-errors
-@cindex @option{-fswitch-errors}
-@cindex @option{-fno-switch-errors}
+@opindex fswitch-errors
+@opindex fno-switch-errors
This option controls what code is generated when no case is matched
in a @code{final switch} statement. The default run time behavior
is to throw a @code{SwitchError}. Turning off @option{-fswitch-errors}
means that instead the execution of the program is immediately halted.
@item -funittest
-@cindex @option{-funittest}
-@cindex @option{-fno-unittest}
+@opindex funittest
+@opindex fno-unittest
Turns on compilation of @code{unittest} code, and turns on the
@code{version(unittest)} identifier. This implies @option{-fassert}.
@item -fversion=@var{value}
-@cindex @option{-fversion}
+@opindex fversion
Turns on compilation of conditional @code{version} code into the program
identified by any of the following values:
@end table
@item -fno-weak-templates
-@cindex @option{-fweak-templates}
-@cindex @option{-fno-weak-templates}
+@opindex fweak-templates
+@opindex fno-weak-templates
Turns off emission of declarations that can be defined in multiple objects as
weak symbols. The default is to emit all public symbols as weak, unless the
target lacks support for weak symbols. Disabling this option means that common
@table @gcctabopt
@item -I@var{dir}
-@cindex @option{-I}
+@opindex I
Specify a directory to use when searching for imported modules at
compile time. Multiple @option{-I} options can be used, and the
paths are searched in the same order.
@item -J@var{dir}
-@cindex @option{-J}
+@opindex J
Specify a directory to use when searching for files in string imports
at compile time. This switch is required in order to use
@code{import(file)} expressions. Multiple @option{-J} options can be
used, and the paths are searched in the same order.
@item -L@var{dir}
-@cindex @option{-L}
+@opindex L
When linking, specify a library search directory, as with @command{gcc}.
@item -B@var{dir}
-@cindex @option{-B}
+@opindex B
This option specifies where to find the executables, libraries,
source files, and data files of the compiler itself, as with @command{gcc}.
@item -fmodule-file=@var{module}=@var{spec}
-@cindex @option{-fmodule-file}
+@opindex fmodule-file
This option manipulates file paths of imported modules, such that if an
imported module matches all or the leftmost part of @var{module}, the file
path in @var{spec} is used as the location to search for D sources.
@end example
@item -imultilib @var{dir}
-@cindex @option{-imultilib}
+@opindex imultilib
Use @var{dir} as a subdirectory of the gcc directory containing
target-specific D sources and interfaces.
@item -iprefix @var{prefix}
-@cindex @option{-iprefix}
+@opindex iprefix
Specify @var{prefix} as the prefix for the gcc directory containing
target-specific D sources and interfaces. If the @var{prefix} represents
a directory, you should include the final @code{'/'}.
@item -nostdinc
-@cindex @option{-nostdinc}
+@opindex nostdinc
Do not search the standard system directories for D source and interface
files. Only the directories that have been specified with @option{-I} options
(and the directory of the current file, if appropriate) are searched.
@table @gcctabopt
@item -H
-@cindex @option{-H}
+@opindex H
Generates D interface files for all modules being compiled. The compiler
determines the output file based on the name of the input file, removes
any directory components and suffix, and applies the @file{.di} suffix.
@item -Hd @var{dir}
-@cindex @option{-Hd}
+@opindex Hd
Same as @option{-H}, but writes interface files to directory @var{dir}.
This option can be used with @option{-Hf @var{file}} to independently set the
output file and directory path.
@item -Hf @var{file}
-@cindex @option{-Hf}
+@opindex Hf
Same as @option{-H} but writes interface files to @var{file}. This option can
be used with @option{-Hd @var{dir}} to independently set the output file and
directory path.
@item -M
-@cindex @option{-M}
+@opindex M
Output the module dependencies of all source files being compiled in a
format suitable for @command{make}. The compiler outputs one
@command{make} rule containing the object file name for that source file,
a colon, and the names of all imported files.
@item -MM
-@cindex @option{-MM}
+@opindex MM
Like @option{-M} but does not mention imported modules from the D standard
library package directories.
@item -MF @var{file}
-@cindex @option{-MF}
+@opindex MF
When used with @option{-M} or @option{-MM}, specifies a @var{file} to write
the dependencies to. When used with the driver options @option{-MD} or
@option{-MMD}, @option{-MF} overrides the default dependency output file.
@item -MG
-@cindex @option{-MG}
+@opindex MG
This option is for compatibility with @command{gcc}, and is ignored by the
compiler.
@item -MP
-@cindex @option{-MP}
+@opindex MP
Outputs a phony target for each dependency other than the modules being
compiled, causing each to depend on nothing.
@item -MT @var{target}
-@cindex @option{-MT}
+@opindex MT
Change the @var{target} of the rule emitted by dependency generation
to be exactly the string you specify. If you want multiple targets,
you can specify them as a single argument to @option{-MT}, or use
multiple @option{-MT} options.
@item -MQ @var{target}
-@cindex @option{-MQ}
+@opindex MQ
Same as @option{-MT}, but it quotes any characters which are special to
@command{make}.
@item -MD
-@cindex @option{-MD}
+@opindex MD
This option is equivalent to @option{-M -MF @var{file}}. The driver
determines @var{file} by removing any directory components and suffix
from the input file, and then adding a @file{.deps} suffix.
@item -MMD
-@cindex @option{-MMD}
+@opindex MMD
Like @option{-MD} but does not mention imported modules from the D standard
library package directories.
@item -X
-@cindex @option{-X}
+@opindex X
Output information describing the contents of all source files being
compiled in JSON format to a file. The driver determines @var{file} by
removing any directory components and suffix from the input file, and then
adding a @file{.json} suffix.
@item -Xf @var{file}
-@cindex @option{-Xf}
+@opindex Xf
Same as @option{-X}, but writes all JSON contents to the specified
@var{file}.
@item -fdoc
-@cindex @option{-fdoc}
+@opindex fdoc
Generates @code{Ddoc} documentation and writes it to a file. The compiler
determines @var{file} by removing any directory components and suffix
from the input file, and then adding a @file{.html} suffix.
@item -fdoc-dir=@var{dir}
-@cindex @option{-fdoc-dir}
+@opindex fdoc-dir
Same as @option{-fdoc}, but writes documentation to directory @var{dir}.
This option can be used with @option{-fdoc-file=@var{file}} to
independently set the output file and directory path.
@item -fdoc-file=@var{file}
-@cindex @option{-fdoc-file}
+@opindex fdoc-file
Same as @option{-fdoc}, but writes documentation to @var{file}. This
option can be used with @option{-fdoc-dir=@var{dir}} to independently
set the output file and directory path.
@item -fdoc-inc=@var{file}
-@cindex @option{-fdoc-inc}
+@opindex fdoc-inc
Specify @var{file} as a @var{Ddoc} macro file to be read. Multiple
@option{-fdoc-inc} options can be used, and files are read and processed
in the same order.
declarations in the generated C++ header.
@item -fsave-mixins=@var{file}
-@cindex @option{-fsave-mixins}
+@opindex fsave-mixins
Generates code expanded from D @code{mixin} statements and writes the
processed sources to @var{file}. This is useful to debug errors in compilation
and provides source for debuggers to show when requested.
@table @gcctabopt
@item -Wall
-@cindex @option{-Wall}
-@cindex @option{-Wno-all}
+@opindex Wall
+@opindex Wno-all
Turns on all warnings messages. Warnings are not a defined part of
the D language, and all constructs for which this may generate a
warning message are valid code.
@item -Walloca
-@cindex @option{-Walloca}
+@opindex Walloca
This option warns on all uses of "alloca" in the source.
@item -Walloca-larger-than=@var{n}
-@cindex @option{-Walloca-larger-than}
-@cindex @option{-Wno-alloca-larger-than}
+@opindex Walloca-larger-than
+@opindex Wno-alloca-larger-than
Warn on unbounded uses of alloca, and on bounded uses of alloca
whose bound can be larger than @var{n} bytes.
@option{-Wno-alloca-larger-than} disables
@option{-Walloca-larger-than=@var{SIZE_MAX}} or larger.
@item -Wno-builtin-declaration-mismatch
-@cindex @option{-Wno-builtin-declaration-mismatch}
-@cindex @option{-Wbuiltin-declaration-mismatch}
+@opindex Wno-builtin-declaration-mismatch
+@opindex Wbuiltin-declaration-mismatch
Warn if a built-in function is declared with an incompatible signature.
@item -Wcast-result
-@cindex @option{-Wcast-result}
-@cindex @option{-Wno-cast-result}
+@opindex Wcast-result
+@opindex Wno-cast-result
Warn about casts that will produce a null or zero result. Currently
this is only done for casting between an imaginary and non-imaginary
data type, or casting between a D and C++ class.
@item -Wno-deprecated
-@cindex @option{-Wdeprecated}
-@cindex @option{-Wno-deprecated}
+@opindex Wdeprecated
+@opindex Wno-deprecated
Do not warn about usage of deprecated features and symbols with
@code{deprecated} attributes.
@item -Werror
-@cindex @option{-Werror}
-@cindex @option{-Wno-error}
+@opindex Werror
+@opindex Wno-error
Turns all warnings into errors.
@item -Wspeculative
-@cindex @option{-Wspeculative}
-@cindex @option{-Wno-speculative}
+@opindex Wspeculative
+@opindex Wno-speculative
List all error messages from speculative compiles, such as
@code{__traits(compiles, ...)}. This option does not report
messages as warnings, and these messages therefore never become
errors when the @option{-Werror} option is also used.
@item -Wunknown-pragmas
-@cindex @option{-Wunknown-pragmas}
-@cindex @option{-Wno-unknown-pragmas}
+@opindex Wunknown-pragmas
+@opindex Wno-unknown-pragmas
Warn when a @code{pragma()} is encountered that is not understood by
@command{gdc}. This differs from @option{-fignore-unknown-pragmas}
where a pragma that is part of the D language, but not implemented by
the compiler, won't get reported.
@item -Wno-varargs
-@cindex Wvarargs
-@cindex Wno-varargs
+@opindex Wvarargs
+@opindex Wno-varargs
Do not warn upon questionable usage of the macros used to handle variable
arguments like @code{va_start}.
@item -fignore-unknown-pragmas
-@cindex @option{-fignore-unknown-pragmas}
-@cindex @option{-fno-ignore-unknown-pragmas}
+@opindex fignore-unknown-pragmas
+@opindex fno-ignore-unknown-pragmas
Turns off errors for unsupported pragmas.
@item -fmax-errors=@var{n}
-@cindex @option{-fmax-errors}
+@opindex fmax-errors
Limits the maximum number of error messages to @var{n}, at which point
@command{gdc} bails out rather than attempting to continue processing the
source code. If @var{n} is 0 (the default), there is no limit on the
number of error messages produced.
@item -fsyntax-only
-@cindex @option{-fsyntax-only}
-@cindex @option{-fno-syntax-only}
+@opindex fsyntax-only
+@opindex fno-syntax-only
Check the code for syntax errors, but do not actually compile it. This
can be used in conjunction with @option{-fdoc} or @option{-H} to generate
files for each module present on the command-line, but no other output
file.
@item -ftransition=@var{id}
-@cindex @option{-ftransition}
+@opindex ftransition
Report additional information about D language changes identified by
@var{id}. The following values are supported:
@table @gcctabopt
@item -defaultlib=@var{libname}
-@cindex @option{-defaultlib=}
+@opindex defaultlib=
Specify the library to use instead of libphobos when linking. Options
specifying the linkage of libphobos, such as @option{-static-libphobos}
or @option{-shared-libphobos}, are ignored.
@item -debuglib=@var{libname}
-@cindex @option{-debuglib=}
+@opindex debuglib=
Specify the debug library to use instead of libphobos when linking.
This option has no effect unless the @option{-g} option was also given
on the command line. Options specifying the linkage of libphobos, such
as @option{-static-libphobos} or @option{-shared-libphobos}, are ignored.
@item -nophoboslib
-@cindex @option{-nophoboslib}
+@opindex nophoboslib
Do not use the Phobos or D runtime library when linking. Options specifying
the linkage of libphobos, such as @option{-static-libphobos} or
@option{-shared-libphobos}, are ignored. The standard system libraries are
used normally, unless @option{-nostdlib} or @option{-nodefaultlibs} is used.
@item -shared-libphobos
-@cindex @option{-shared-libphobos}
+@opindex shared-libphobos
On systems that provide @file{libgphobos} and @file{libgdruntime} as a
shared and a static library, this option forces the use of the shared
version. If no shared version was built when the compiler was configured,
this option has no effect.
@item -static-libphobos
-@cindex @option{-static-libphobos}
+@opindex static-libphobos
On systems that provide @file{libgphobos} and @file{libgdruntime} as a
shared and a static library, this option forces the use of the static
version. If no static version was built when the compiler was configured,
@table @gcctabopt
@item -fdump-d-original
-@cindex @option{-fdump-d-original}
+@opindex fdump-d-original
Output the internal front-end AST after the @code{semantic3} stage.
This option is only useful for debugging the GNU D compiler itself.
@item -v
-@cindex @option{-v}
+@opindex v
Dump information about the compiler language processing stages as the source
program is being compiled. This includes listing all modules that are
processed through the @code{parse}, @code{semantic}, @code{semantic2}, and
@c man end
-@node Index
-@unnumbered Index
+@include gpl_v3.texi
+@include fdl.texi
+
+@node Option Index
+@unnumbered Option Index
+
+@command{gdc}'s command line options are indexed here without any initial
+@samp{-} or @samp{--}. Where an option has both positive and negative forms
+(such as @option{-f@var{option}} and @option{-fno-@var{option}}), relevant
+entries in the manual are indexed under the most appropriate form; it may
+sometimes be useful to look up both forms.
+
+@printindex op
+
+@node Keyword Index
+@unnumbered Keyword Index
@printindex cp
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