Date: Wed, 04 Jan 2012 14:52:00 -0800 From: Oleksandr Tymoshenko <gonzo@freebsd.org> To: freebsd-current@freebsd.org Subject: Re: add 'ldd' to cross-tools ? Message-ID: <4F04D810.60304@freebsd.org> In-Reply-To: <20120104222315.GA73613@onelab2.iet.unipi.it> References: <20120104222315.GA73613@onelab2.iet.unipi.it>
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On 04/01/2012 2:23 PM, Luigi Rizzo wrote: > Hi, > in doing cross-builds of picobsd, i found i need a cross-version > of "ldd" so i can run it on the host to detect which shared libraries > are used by binaries on the target architecture > (for amd64->i386 there is a partial workaround, but don't know > if it works in other cases) > > Is there any concern in adding usr.bin/ldd to the list of cross-tools > in Makefile.inc1 ? It is a small program and should not increase > the build time in any significant way. > > Otherwise, does anyone know the magic to build a cross-arch > version of a program in the FreeBSD source tree ? AFAIK ldd can't be used as a cross-tool. It sets some env variables for loader (e.g. ld-elf.so), calls execve or dlopen and relies on ld.so to print all the required data. You might get away with it on amd64/i386 host-target pair but it's not going to work for i386/arm or i386/mips pair.
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