.TH DMD 1 "2018-01-07" "The D Language Foundation" "The D Language Foundation"
.SH NAME
dmd \- Digital Mars D2.x Compiler
.SH SYNOPSIS
.B dmd \fIfiles\fR ... [ \fI-switch\fR ... ]
.SH DESCRIPTION
.B dmd
Compiles source code written in the D programming language.
.SH OPTIONS
.IP "file, file.d, file.htm, file.html"
D source files to compile
.IP file.di
D interface files
.IP file.o
Object files to link in
.IP file.a
Library files to link in
.IP @cmdfile
A file to read more command-line arguments from,
which may contain # single-line comments
.IP -allinst
Generate code for all template instantiations
.IP -betterC
Omit generating some runtime information and helper functions
.IP -boundscheck=[on|safeonly|off]
Bounds checks on, in @safe only, or off
.IP -c
Do not link
.IP -color
Turn colored console output on
.IP -color=[on|off]
Force colored console output on or off
.IP -conf=\fIfilename\fR
Use config file at \fIfilename\fR
.IP -cov
Do code coverage analysis
.IP -cov=\fInnn\fR
Require at least nnn% code coverage
.IP -D
Generate documentation
.IP -Dd\fIdirectory\fR
Write documentation file to \fIdirectory\fR
.IP -Df\fIfilename\fR
Write documentation file to \fIfilename\fR
.IP -d
Silently allow deprecated features
.IP -dw
Show use of deprecated features as warnings (default)
.IP -de
Show use of deprecated features as errors (halt compilation)
.IP -debug
Compile in debug code
.IP -debug=\fIlevel\fR
Compile in debug code <= \fIlevel\fR
.IP -debug=\fIident\fR
Compile in debug code identified by \fIident\fR
.IP -debuglib=\fIname\fR
Set symbolic debug library to \fIname\fR
.IP -defaultlib=\fIname\fR
Set default library to \fIname\fR
.IP -deps
Print module dependencies (imports/file/version/debug/lib)
.IP -deps=\fIfilename\fR
Write module dependencies to \fIfilename\fR (only imports)
.IP -fPIC
Generate position independent code
.IP -dip25
Implement http://wiki.dlang.org/DIP25
.IP -dip1000
Implement https://github.com/dlang/DIPs/blob/master/DIPs/DIP1000.md
.IP -dip1008
Implement https://github.com/dlang/DIPs/blob/master/DIPs/DIP1008.md
.IP -g
Add symbolic debug info
.IP -gf
Emit debug info for all referenced types
.IP -gs
Always emit stack frame
.IP -gx
Add stack stomp code
.IP -H
Generate 'header' file
.IP -Hd=\fIdirectory\fR
Write 'header' file to \fIdirectory\fR
.IP -Hf=\fIfilename\fR
Write 'header' file to \fIfilename\fR
.IP --help
Print help and exit
.IP -I=\fIdirectory\fR
Look for imports also in \fIdirectory\fR
.IP -ignore
Ignore unsupported pragmas
.IP -inline
Do function inlining
.IP -J=\fIdirectory\fR
Look for string imports also in \fIdirectory\fR
.IP -L=\fIlinkerflag\fR
Pass \fIlinkerflag\fR to link
.IP -lib
Generate library rather than object files
.IP -m32
Generate 32 bit code
.IP -m64
Generate 64 bit code
.IP -main
Add default main() (e.g. for unittesting)
.IP -man
Open web browser on manual page
.IP -map
Generate linker .map file
.IP -mcpu=\fIid\fR
Generate instructions for architecture identified by \fIid\fR
.IP -mcpu=?
List all architecture options
.IP -mv=\fIpackage.module\fR=<filespec>
Use <filespec> as source file for \fIpackage.module\fR
.IP -noboundscheck
No array bounds checking (deprecated, use -boundscheck=off)
.IP -O
Optimize
.IP -o-
Do not write object file
.IP -od=\fIdirectory\fR
Write object & library files to \fIdirectory\fR
.IP -of=\fIfilename\fR
Name output file to \fIfilename\fR
.IP -op
Preserve source path for output files
.IP -profile
Profile runtime performance of generated code
.IP -profile=gc
Profile runtime allocations
.IP -release
Compile release version
.IP -shared
Generate shared library (DLL)
.IP -transition=\fIid\fR
Help with language change identified by \fIid\fR
.IP -transition=?
List all language changes
.IP -unittest
Compile in unit tests
.IP -v
Verbose
.IP -vcolumns
Print character (column) numbers in diagnostics
.IP -verrors=\fInum\fR
Limit the number of error messages (0 means unlimited)
.IP -verrors=spec
Show errors from speculative compiles such as __traits(compiles,...)
.IP -vgc
List all gc allocations including hidden ones
.IP -vtls
List all variables going into thread local storage
.IP --version
Print compiler version and exit
.IP -version=\fIlevel\fR
Compile in version code >= \fIlevel\fR
.IP -version=\fIident\fR
Compile in version code identified by \fIident\fR
.IP -w
Warnings as errors (compilation will halt)
.IP -wi
Warnings as messages (compilation will continue)
.IP -X
Generate JSON file
.IP -Xf=\fIfilename\fR
Write JSON file to \fIfilename\fR
.SH LINKING
Linking is done directly by the
.B dmd
compiler after a successful compile. To prevent
.B dmd
from running the linker, use the
.B -c
switch.
.PP
The actual linking is done by running \fBgcc\fR.
This ensures compatibility with modules compiled with
\fBgcc\fR.
.SH FILES
.I /etc/dmd.conf
dmd will look for the initialization file
.I dmd.conf
in the directory \fI/etc\fR.
If found, environment variable settings in the file will
override any existing settings.
.SH ENVIRONMENT
The D compiler dmd uses the following environment
variables:
.IP DFLAGS 10
The value of
.B DFLAGS
is treated as if it were appended on the command line to
\fBdmd\fR.
.SH AUTHOR
Copyright (c) 1999-2018 by The D Language Foundation written by Walter Bright
.SH "ONLINE DOCUMENTATION"
.UR https://dlang.org/dmd.html
https://dlang.org/dmd.html
.UE
.SH "SEE ALSO"
.BR dmd.conf (5)
.BR rdmd (1)
.BR dumpobj (1)
.BR obj2asm (1)
.BR gcc (1)