1.\" 2.\" Copyright (c) 2009 3.\" The DragonFly Project. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in 13.\" the documentation and/or other materials provided with the 14.\" distribution. 15.\" 3. Neither the name of The DragonFly Project nor the names of its 16.\" contributors may be used to endorse or promote products derived 17.\" from this software without specific, prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 22.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 23.\" COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24.\" INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 25.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 27.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 29.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.Dd February 25, 2011 33.Os 34.Dt COMPILERS.CONF 5 35.Sh NAME 36.Nm compilers.conf 37.Nd configuration file for external compilers 38.Sh SYNOPSIS 39.Pa /etc/compilers.conf 40.Sh DESCRIPTION 41The 42.Nm 43file allows to configure 44.Dq external 45compilers for usage with the 46.Dx 47.Xr build 7 48system. 49.Pp 50The 51.Pa /etc/defaults/compilers.conf 52file specifies the default settings for all variables, the 53.Pa /etc/compilers.conf 54file specifies override settings. 55.Pp 56The following variables are available: 57.Bl -tag -width ".Va <version>_CPPFLAGS" 58.It Va <version>_CC 59The pathname of the 60.Nm cc 61program of the compiler. 62.It Va <version>_CFLAGS 63Any additional flags to pass to 64.Va <version>_CC . 65.It Va <version>_CPP 66The pathname of the 67.Nm cpp 68program of the compiler. 69.It Va <version>_CPPFLAGS 70Any additional flags to pass to 71.Va <version>_CPP . 72.It Va <version>_CXX 73The pathname of the 74.Nm c++ 75program of the compiler. 76.It Va <version>_CXXFLAGS 77Any additional flags to pass to 78.Va <version>_CXX . 79.It Va <version>_VERSION 80What to output when the 81.Fl dumpversion 82option is used. 83This helps 84.Nm clang 85with 86.Xr pkgsrc 7 . 87.El 88.Pp 89Once configured the compiler can then be used like this: 90.Bd -literal -offset indent 91env CCVER=clang make 92.Ed 93.Pp 94To build world and kernel, use the following instructions: 95.Bd -literal -offset indent 96cd /usr/src 97fetch http://leaf.dragonflybsd.org/~swildner/world_clang.diff 98patch -p1 <world_clang.diff 99env WORLD_CCVER=clang make -DNO_GCC44 buildworld 100env WORLD_CCVER=clang make buildkernel KERNCONF=MYCONF 101.Ed 102.Pp 103Currently, defaults are provided for 104.Nm clang 105(installed from 106.Xr pkgsrc 7 Ap s 107.Pa lang/clang ), 108.Nm clangsvn 109(installed from SVN trunk as described in 110.Pa http://clang.llvm.org/get_started.html ) 111and 112.Nm gcc46 113(installed from 114.Xr pkgsrc 7 Ap s 115.Pa lang/gnat-aux ) . 116.Sh IMPLEMENTATION NOTES 117In 118.Dx , 119compilers are selected by setting the 120.Ev CCVER 121variable. 122The 123.Pa cpp , 124.Pa cc 125etc\&. programs in 126.Pa /usr/bin 127are actually links to the 128.Xr objformat 1 129deflector program which is responsible for executing the 130correct programs (located in 131.Pa /usr/libexec/$CCVER ) . 132.Pp 133Traditionally, 134.Dx 135has 2 compilers in base, one of which is the default compiler and the other 136is either a newer or older version. 137In order to allow additional non-base compilers into 138.Dx Ap s 139build process, 140.Xr objformat 1 141deflects to 142.Pa /usr/libexec/custom 143when 144.Ev CCVER Ap s 145setting is not one of the compilers in base. 146This directory contains a 147.Pa cc 148wrapper script (and some links to it). 149The wrapper script then takes care of making the compiler look and behave 150like a compiler in base. 151.Pp 152The settings in 153.Nm 154specify paths and flags for the 155.Pa /usr/libexec/custom/cc 156script. 157.Sh FILES 158.Bl -tag -width ".Pa /etc/compilers.conf" -compact 159.It Pa /etc/compilers.conf 160external compiler configuration file 161.El 162.Sh SEE ALSO 163.Xr objformat 1 , 164.Xr build 7 165.Sh HISTORY 166The 167.Nm 168file first appeared in 169.Dx 2.3 . 170