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Date: Sat, 18 Jan 2020 11:27:43 -0800
From: Khem Raj <raj.khem@...il.com>
To: musl@...ts.openwall.com
Subject: Re: Absolute symlink breaks cross compilation
On Fri, Jan 17, 2020 at 9:15 PM Rich Felker <dalias@...c.org> wrote:
>
> On Sat, Jan 18, 2020 at 02:24:49AM +0300, Андрей Аладьев wrote:
> > Hello. Gentoo users find that it is not possible to cross compile musl. See
> > here https://bugs.gentoo.org/645626 more details.
> >
> > I am sending to you proposed patch that is related to upstream. Please keep
> > all installed symlinks relative. Thank you.
>
> > diff --git a/Makefile b/Makefile
> > index bd8f5c38..81bf33d5 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -209,7 +209,7 @@ $(DESTDIR)$(includedir)/%: $(srcdir)/include/%
> > $(INSTALL) -D -m 644 $< $@
> >
> > $(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
> > - $(INSTALL) -D -l $(libdir)/libc.so $@ || true
> > + $(INSTALL) -D -l $$(realpath --no-symlinks --relative-to=$$(dirname $@) $(DESTDIR)$(libdir)/libc.so) $@ || true
> >
> > install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
> >
>
> I don't understand what you mean by it "breaks cross compilation". The
> ldso link produced is not used for compiling anything; it's only used
> for executing programs, which you don't do when cross compiling musl
> or cross compiling applications against it. The link is setup to be
> installed on the $host, not to be used on the $build where it's not
> needed.
>
> Could you could explain what specifically you're trying to do that's
> not working as desired?
>
If you look at commit msg
for https://github.com/kraj/musl/commit/102f35b194a3405b30001ff08cfd54752179376f
then you will see the usecase we have in for Yocto/OE
> Rich
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