Date: Thu, 2 Feb 2012 01:58:40 -0600 From: "Conrad J. Sabatier" <conrads@cox.net> To: Joshua Isom <jrisom@gmail.com> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Clang and ports Message-ID: <20120202015840.69193201@cox.net> In-Reply-To: <4F2A3E0F.6060707@gmail.com> References: <4F2A3E0F.6060707@gmail.com>
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On Thu, 02 Feb 2012 01:41:03 -0600
Joshua Isom <jrisom@gmail.com> wrote:
> I know that build cluster lists some ports that have problems with
> clang, but it doesn't say if they're tested or not. I set up a clang
> jail to test out things before switching to clang for general use.
> When I try running mencoder to encode a file to x264, it seg faults.
> Changing options doesn't change anything. A gdb backtrace points to
> x264 being the problem. Everything compiles and installs, but the
> build's useless. Is clang ready for ports, or is it only safe for
> kernel/world?
I've been using clang for ports for a while now, and many ports will
build and run just fine using it.
I've been gradually adding to two lists of exceptions in
my /etc/make.conf -- those that absolutely require the base system GNU
compiler (USE_GCC?=4.2) and those that simply need *some* version of
gcc (for which I use gcc46 from ports (USE_GCC?=4.6). Before defining
CC and friends to use clang, I first list these exceptions (I use
the ?= operator so these can still be overridden from the command
line). So, the general format is:
#
# default to using clang for all port builds, with the following exceptions
#
# ports which will only build with the base system GNU compiler (4.2)
#
# the "make index" target also needs this
.if target(index) | \
${.CURDIR:M*/graphics/ImageMagick* } | \
${.CURDIR:M*/graphics/opencv*}
USE_GCC?=4.2
.endif
# ports which need *some* version of the GNU compiler (won't build with clang)
# use the highest version of gcc we have installed from ports (4.6)
.if ${.CURDIR:M*/accessibility/jovie*} | \
${.CURDIR:M*/accessibility/kdeaccessibility4*} | \
${.CURDIR:M*/audio/grip*} | \
${.CURDIR:M*/audio/rosegarden*} | \
${.CURDIR:M*/deskutils/kdepimlibs4*} | \
${.CURDIR:M*/devel/icu*} | \
${.CURDIR:M*/games/kdegames4*} | \
${.CURDIR:M*/graphics/dri*} | \
${.CURDIR:M*/lang/gcc*} | \
${.CURDIR:M*/multimedia/avidemux2*} | \
${.CURDIR:M*/multimedia/kdemultimedia4*} | \
${.CURDIR:M*/multimedia/vlc*} | \
${.CURDIR:M*/multimedia/xbmc*} | \
${.CURDIR:M*/net/kdenetwork4*} | \
${.CURDIR:M*/net/opal3*} | \
${.CURDIR:M*/net-p2p/ktorrent*} | \
${.CURDIR:M*/sysutils/lsof*} | \
${.CURDIR:M*/x11/kde4-baseapps*} | \
${.CURDIR:M*/x11/kdelibs4*} | \
${.CURDIR:M*/x11/kde4-workspace*} | \
${.CURDIR:M*/x11/lxpanel*}
USE_GCC?=4.6+
.endif
#
# use clang unless gcc is explicitly required
#
.if !defined(USE_GCC)
.if !defined(CC) || ${CC} == "cc"
CC=clang
.endif
.if !defined(CXX) || ${CXX} == "c++"
CXX=clang++
.endif
.if !defined(CPP) || ${CPP} == "cpp"
CPP=clang-cpp
.endif
.endif
This, of course, doesn't fully address runtime issues, mainly just
build issues, but the same could be done for those, too.
For what it's worth. :-)
--
Conrad J. Sabatier
conrads@cox.net
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