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diff --git a/gcc/d/gdc.texi b/gcc/d/gdc.texi new file mode 100644 index 0000000..d3bf75c --- /dev/null +++ b/gcc/d/gdc.texi @@ -0,0 +1,853 @@ +\input texinfo @c -*-texinfo-*- +@setfilename gdc.info +@settitle The GNU D Compiler + +@c Merge the standard indexes into a single one. +@syncodeindex fn cp +@syncodeindex vr cp +@syncodeindex ky cp +@syncodeindex pg cp +@syncodeindex tp cp + +@include gcc-common.texi + +@c Copyright years for this manual. +@set copyrights-d 2006-2022 + +@copying +@c man begin COPYRIGHT +Copyright @copyright{} @value{copyrights-d} Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with no +Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. +A copy of the license is included in the +@c man end +section entitled ``GNU Free Documentation License''. +@ignore +@c man begin COPYRIGHT +man page gfdl(7). +@c man end +@end ignore +@end copying + +@ifinfo +@format +@dircategory Software development +@direntry +* gdc: (gdc). A GCC-based compiler for the D language +@end direntry +@end format + +@insertcopying +@end ifinfo + +@titlepage +@title The GNU D Compiler +@versionsubtitle +@author David Friedman, Iain Buclaw + +@page +@vskip 0pt plus 1filll +Published by the Free Software Foundation @* +51 Franklin Street, Fifth Floor@* +Boston, MA 02110-1301, USA@* +@sp 1 +@insertcopying +@end titlepage +@contents +@page + +@node Top +@top Introduction + +This manual describes how to use @command{gdc}, the GNU compiler for +the D programming language. This manual is specifically about +@command{gdc}. For more information about the D programming +language in general, including language specifications and standard +package documentation, see @uref{https://dlang.org/}. + +@menu +* 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. +@end menu + + +@include gpl_v3.texi + +@include fdl.texi + + +@node Invoking gdc +@chapter Invoking gdc + +@c man title gdc A GCC-based compiler for the D language + +@ignore +@c man begin SYNOPSIS gdc +gdc [@option{-c}|@option{-S}] [@option{-g}] [@option{-pg}] + [@option{-O}@var{level}] [@option{-W}@var{warn}@dots{}] + [@option{-I}@var{dir}@dots{}] [@option{-L}@var{dir}@dots{}] + [@option{-f}@var{option}@dots{}] [@option{-m}@var{machine-option}@dots{}] + [@option{-o} @var{outfile}] [@@@var{file}] @var{infile}@dots{} + +Only the most useful options are listed here; see below for the +remainder. +@c man end +@c man begin SEEALSO +gpl(7), gfdl(7), fsf-funding(7), gcc(1) +and the Info entries for @file{gdc} and @file{gcc}. +@c man end +@end ignore + +@c man begin DESCRIPTION gdc + +The @command{gdc} command is the GNU compiler for the D language and +supports many of the same options as @command{gcc}. @xref{Option Summary, , +Option Summary, gcc, Using the GNU Compiler Collection (GCC)}. +This manual only documents the options specific to @command{gdc}. + +@c man end + +@menu +* Input and Output files:: Controlling the kind of output: + an executable, object files, assembler files, +* Runtime Options:: Options controlling runtime behavior +* Directory Options:: Where to find module files +* Code Generation:: Options controlling the output of gdc +* Warnings:: Options controlling warnings specific to gdc +* Linking:: Options influencing the linking step +* Developer Options:: Options useful for developers of gdc +@end menu + +@c man begin OPTIONS + +@node Input and Output files +@section Input and Output files +@cindex suffixes for D source +@cindex D source file suffixes + +For any given input file, the file name suffix determines what kind of +compilation is done. The following kinds of input file names are supported: + +@table @gcctabopt +@item @var{file}.d +D source files. +@item @var{file}.dd +Ddoc source files. +@item @var{file}.di +D interface files. +@end table + +You can specify more than one input file on the @command{gdc} command line, +each being compiled separately in the compilation process. If you specify a +@code{-o @var{file}} option, all the input files are compiled together, +producing a single output file, named @var{file}. This is allowed even +when using @code{-S} or @code{-c}. + +@cindex D interface files. +A D interface file contains only what an import of the module needs, +rather than the whole implementation of that module. They can be created +by @command{gdc} from a D source file by using the @code{-H} option. +When the compiler resolves an import declaration, it searches for matching +@file{.di} files first, then for @file{.d}. + +@cindex Ddoc source files. +A Ddoc source file contains code in the D macro processor language. It is +primarily designed for use in producing user documentation from embedded +comments, with a slight affinity towards HTML generation. If a @file{.d} +source file starts with the string @code{Ddoc} then it is treated as general +purpose documentation, not as a D source file. + +@node Runtime Options +@section Runtime Options +@cindex options, runtime + +These options affect the runtime behavior of programs compiled with +@command{gdc}. + +@table @gcctabopt + +@item -fall-instantiations +@cindex @option{-fall-instantiations} +@cindex @option{-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} +Turn off code generation for @code{assert} contracts. + +@item -fno-bounds-check +@cindex @option{-fbounds-check} +@cindex @option{-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 +does violate array bounds constraints. It is safe to use this option +if you are sure that your code never throws a @code{RangeError}. + +@item -fbounds-check=@var{value} +@cindex @option{-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: + +@table @samp +@item on +Turns on array bounds checking for all functions. +@item safeonly +Turns on array bounds checking only for @code{@@safe} functions. +@item off +Turns off array bounds checking completely. +@end table + +@item -fno-builtin +@cindex @option{-fbuiltin} +@cindex @option{-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} +This option controls what code is generated on an assertion, bounds check, or +final switch failure. The following values are supported: + +@table @samp +@item context +Throw an @code{AssertError} with extra context information. +@item halt +Halt the program execution. +@item throw +Throw an @code{AssertError} (the default). +@end table + +@item -fdebug +@item -fdebug=@var{value} +@cindex @option{-fdebug} +@cindex @option{-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 +by any of the following values: + +@table @samp +@item level +Sets the debug level to @var{level}, any @code{debug} code <= @var{level} +is compiled into the program. +@item ident +Turns on compilation of any @code{debug} code identified by @var{ident}. +@end table + +@item -fno-druntime +@cindex @option{-fdruntime} +@cindex @option{-fno-druntime} +Implements @uref{https://dlang.org/spec/betterc.html}. Assumes that +compilation targets an environment without a D runtime library. + +This is equivalent to compiling with the following options: + +@example +gdc -nophoboslib -fno-exceptions -fno-moduleinfo -fno-rtti +@end example + +@item -fextern-std=@var{standard} +@cindex @option{-fextern-std} +Sets the C++ name mangling compatibility to the version identified by +@var{standard}. The following values are supported: + +@table @samp +@item c++98 +@item c++03 +Sets @code{__traits(getTargetInfo, "cppStd")} to @code{199711}. +@item c++11 +Sets @code{__traits(getTargetInfo, "cppStd")} to @code{201103}. +@item c++14 +Sets @code{__traits(getTargetInfo, "cppStd")} to @code{201402}. +@item c++17 +Sets @code{__traits(getTargetInfo, "cppStd")} to @code{201703}. +This is the default. +@item c++20 +Sets @code{__traits(getTargetInfo, "cppStd")} to @code{202002}. +@end table + +@item -fno-invariants +@cindex @option{-finvariants} +@cindex @option{-fno-invariants} +Turns off code generation for class @code{invariant} contracts. + +@item -fmain +@cindex @option{-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} +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 +include module constructors and destructors (@code{static this} and +@code{static ~this}), @code{unittest} code, and @code{DSO} registry +functions for dynamically linked code. + +@item -fonly=@var{filename} +@cindex @option{-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} +Turns off code generation for postcondition @code{out} contracts. + +@item -fno-preconditions +@cindex @option{-fpreconditions} +@cindex @option{-fno-preconditions} +Turns off code generation for precondition @code{in} contracts. + +@item -fpreview=@var{id} +@cindex @option{-fpreview} +Turns on an upcoming D language change identified by @var{id}. The following +values are supported: + +@table @samp +@item all +Turns on all upcoming D language features. +@item dip1000 +Implements @uref{https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1000.md} +(Scoped pointers). +@item dip1008 +Implements @uref{https://github.com/dlang/DIPs/blob/master/DIPs/other/DIP1008.md} +(Allow exceptions in @code{@@nogc} code). +@item dip1021 +Implements @uref{https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1021.md} +(Mutable function arguments). +@item dip25 +Implements @uref{https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md} +(Sealed references). +@item dtorfields +Turns on generation for destructing fields of partially constructed objects. +@item fieldwise +Turns on generation of struct equality to use field-wise comparisons. +@item fixaliasthis +Implements new lookup rules that check the current scope for @code{alias this} +before searching in upper scopes. +@item fiximmutableconv +Disallows unsound immutable conversions that were formerly incorrectly +permitted. +@item in +Implements @code{in} parameters to mean @code{scope const [ref]} and accepts +rvalues. +@item inclusiveincontracts +Implements @code{in} contracts of overridden methods to be a superset of parent +contract. +@item intpromote +Implements C-style integral promotion for unary @code{+}, @code{-} and @code{~} +expressions. +@item nosharedaccess +Turns off and disallows all access to shared memory objects. +@item rvaluerefparam +Implements rvalue arguments to @code{ref} parameters. +@item systemvariables +Disables access to variables marked @code{@@system} from @code{@@safe} code. +@end table + +@item -frelease +@cindex @option{-frelease} +@cindex @option{-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 +failures are undefined behavior. + +This is equivalent to compiling with the following options: + +@example +gdc -fno-assert -fbounds-check=safe -fno-invariants \ + -fno-postconditions -fno-preconditions -fno-switch-errors +@end example + +@item -frevert= +@cindex @option{-frevert} +Turns off a D language feature identified by @var{id}. The following values +are supported: + +@table @samp +@item all +Turns off all revertable D language features. +@item dip25 +Reverts @uref{https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md} +(Sealed references). +@item dtorfields +Turns off generation for destructing fields of partially constructed objects. +@item markdown +Turns off Markdown replacements in Ddoc comments. +@end table + +@item -fno-rtti +@cindex @option{-frtti} +@cindex @option{-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} +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} +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} +Turns on compilation of conditional @code{version} code into the program +identified by any of the following values: + +@table @samp +@item level +Sets the version level to @var{level}, any @code{version} code >= @var{level} +is compiled into the program. +@item ident +Turns on compilation of @code{version} code identified by @var{ident}. +@end table + +@item -fno-weak-templates +@cindex @option{-fweak-templates} +@cindex @option{-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 +symbols are instead put in COMDAT or become private. + +@end table + +@node Directory Options +@section Options for Directory Search +@cindex directory options +@cindex options, directory search +@cindex search path + +These options specify directories to search for files, libraries, and +other parts of the compiler: + +@table @gcctabopt + +@item -I@var{dir} +@cindex @option{-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} +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} +When linking, specify a library search directory, as with @command{gcc}. + +@item -B@var{dir} +@cindex @option{-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} +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. +This is used when the source file path and names are not the same as the +package and module hierarchy. Consider the following examples: + +@example +gdc test.d -fmodule-file=A.B=foo.d -fmodule-file=C=bar +@end example + +This will tell the compiler to search in all import paths for the source +file @var{foo.d} when importing @var{A.B}, and the directory @var{bar/} +when importing @var{C}, as annotated in the following D code: + +@example +module test; +import A.B; // Matches A.B, searches for foo.d +import C.D.E; // Matches C, searches for bar/D/E.d +import A.B.C; // No match, searches for A/B/C.d +@end example + +@item -imultilib @var{dir} +@cindex @option{-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} +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} +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. + +@end table + +@node Code Generation +@section Code Generation +@cindex options, code generation + +In addition to the many @command{gcc} options controlling code generation, +@command{gdc} has several options specific to itself. + +@table @gcctabopt + +@item -H +@cindex @option{-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} +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} +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} +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} +Like @option{-M} but does not mention imported modules from the D standard +library package directories. + +@item -MF @var{file} +@cindex @option{-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} +This option is for compatibility with @command{gcc}, and is ignored by the +compiler. + +@item -MP +@cindex @option{-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} +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} +Same as @option{-MT}, but it quotes any characters which are special to +@command{make}. + +@item -MD +@cindex @option{-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} +Like @option{-MD} but does not mention imported modules from the D standard +library package directories. + +@item -X +@cindex @option{-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} +Same as @option{-X}, but writes all JSON contents to the specified +@var{file}. + +@item -fdoc +@cindex @option{-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} +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} +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} +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. + +@item -fdump-c++-spec=@var{file} +For D source files, generate corresponding C++ declarations in @var{file}. + +@item -fdump-c++-spec-verbose +In conjunction with @option{-fdump-c++-spec=} above, add comments for ignored +declarations in the generated C++ header. + +@item -fsave-mixins=@var{file} +@cindex @option{-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. + +@end table + +@node Warnings +@section Warnings +@cindex options to control warnings +@cindex warning messages +@cindex messages, warning +@cindex suppressing warnings + +Warnings are diagnostic messages that report constructions that +are not inherently erroneous but that are risky or suggest there +is likely to be a bug in the program. Unless @option{-Werror} is +specified, they do not prevent compilation of the program. + +@table @gcctabopt + +@item -Wall +@cindex @option{-Wall} +@cindex @option{-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} +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} +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} warning and is equivalent to +@option{-Walloca-larger-than=@var{SIZE_MAX}} or larger. + +@item -Wcast-result +@cindex @option{-Wcast-result} +@cindex @option{-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} +Do not warn about usage of deprecated features and symbols with +@code{deprecated} attributes. + +@item -Werror +@cindex @option{-Werror} +@cindex @option{-Wno-error} +Turns all warnings into errors. + +@item -Wspeculative +@cindex @option{-Wspeculative} +@cindex @option{-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 -Wtemplates +@cindex @option{-Wtemplates} +@cindex @option{-Wno-templates} +Warn when a template instantiation is encountered. Some coding +rules disallow templates, and this may be used to enforce that rule. + +@item -Wunknown-pragmas +@cindex @option{-Wunknown-pragmas} +@cindex @option{-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 +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} +Turns off errors for unsupported pragmas. + +@item -fmax-errors=@var{n} +@cindex @option{-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} +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} +Report additional information about D language changes identified by +@var{id}. The following values are supported: + +@table @samp +@item all +List information on all D language transitions. +@item complex +List all usages of complex or imaginary types. +@item field +List all non-mutable fields which occupy an object instance. +@item in +List all usages of @code{in} on parameter. +@item nogc +List all hidden GC allocations. +@item templates +List statistics on template instantiations. +@item tls +List all variables going into thread local storage. +@item vmarkdown +List instances of Markdown replacements in Ddoc. +@end table + +@end table + +@node Linking +@section Options for Linking +@cindex options, linking +@cindex linking, static + +These options come into play when the compiler links object files into an +executable output file. They are meaningless if the compiler is not doing +a link step. + +@table @gcctabopt + +@item -defaultlib=@var{libname} +@cindex @option{-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=} +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} +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} +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} +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, +this option has no effect. + +@end table + +@node Developer Options +@section Developer Options +@cindex developer options +@cindex debug dump options +@cindex dump options + +This section describes command-line options that are primarily of +interest to developers or language tooling. + +@table @gcctabopt + +@item -fdump-d-original +@cindex @option{-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} +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 +@code{semantic3} stages; all @code{import} modules and their file paths; +and all @code{function} bodies that are being compiled. + +@end table + +@c man end + +@node Index +@unnumbered Index + +@printindex cp + +@bye |