Date: Mon, 28 May 2012 09:10:19 -0400 From: Rich Felker <dalias@...ifal.cx> To: musl@...ts.openwall.com Subject: Re: SIGILL when dynamic linking without -Wl,-Bsymbolic-functions On Sun, May 27, 2012 at 09:52:56PM -0700, Isaac Dunham wrote: > When -Wl,-Bsymbolic-functions is disabled in the makefile, musl > cannot be used for dynamic linking. > However, the -Bsymbolic-functions option was added in binutils 2.17.50 > (a CVS/git version, not a release); this was apparently just prior to > the license switch. > > As a result, it will be impossible to use Aboriginal Linux packages to > generate a version capable of dynamic linking. > > I'm pretty sure this used to work...but I don't remember when I tested > it last. I think it was somewhere around 0.8.1-0.8.5. It's always been this way. In principle -fvisibility=protected should be able to do the same thing on earlier GCC's, but it doesn't work right. You could also try -fPIE instead of -fPIC; that might work. As a last resort, -Bsymbolic will work, but it will do too much and will break any applications that access global vars in libc (like optarg, environ, etc.). I thought Rob said he was going to patch -Bsymbolic-functions into his binutils, but I guess he never did... Rich
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