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 October 14, 2012 33.Dt COMPILERS.CONF 5 34.Os 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.El 80.Pp 81Currently, defaults are provided for 82.Nm clang 83(installed from 84.Xr pkgsrc 7 Ap s 85.Pa lang/clang ) , 86.Nm clangsvn 87(installed from SVN trunk as described in 88.Pa http://clang.llvm.org/get_started.html ) , 89.Nm gcc46 90(installed from 91.Xr pkgsrc 7 Ap s 92.Pa lang/gnat-aux ) , 93and 94.Nm pcc 95(installed from 96.Xr pkgsrc 7 Ap s 97.Pa lang/pcc-current ) . 98.Sh IMPLEMENTATION NOTES 99In 100.Dx , 101compilers are selected by setting the 102.Ev CCVER 103variable. 104The 105.Pa cpp , 106.Pa cc , 107etc\&. programs in 108.Pa /usr/bin 109are actually links to the 110.Xr objformat 1 111deflector program which is responsible for executing the 112correct programs (located in 113.Pa /usr/libexec/$CCVER ) . 114.Pp 115Traditionally, 116.Dx 117has 2 compilers in base, one of which is the default compiler and the other 118is either a newer or older version. 119In order to allow additional non-base compilers into 120.Dx Ap s 121build process, 122.Xr objformat 1 123deflects to 124.Pa /usr/libexec/custom 125when 126.Ev CCVER Ap s 127setting is not one of the compilers in base. 128This directory contains a 129.Pa cc 130wrapper script (and some links to it). 131The wrapper script then takes care of making the compiler look and behave 132like a compiler in base. 133.Pp 134The settings in 135.Nm 136specify paths and flags for the 137.Pa /usr/libexec/custom/cc 138script. 139.Sh FILES 140.Bl -tag -width ".Pa /etc/compilers.conf" -compact 141.It Pa /etc/compilers.conf 142external compiler configuration file 143.El 144.Sh EXAMPLES 145Once configured the compiler can be used like this: 146.Bd -literal -offset indent 147env CCVER=clang make 148.Ed 149.Pp 150To try building world and kernel, use: 151.Bd -literal -offset indent 152cd /usr/src 153env WORLD_CCVER=<version> make -DNO_GCC47 buildworld 154env WORLD_CCVER=<version> make buildkernel KERNCONF=MYCONF 155.Ed 156.Sh SEE ALSO 157.Xr objformat 1 , 158.Xr build 7 159.Sh HISTORY 160The 161.Nm 162file first appeared in 163.Dx 2.3 . 164