Re: [gentoo-alt] [PREFIX] Darwin/macOS breakage on libreadline update

[Michael Weiser]

Hi Fabian,

reading up after the holdidays. :)

On Fri, Dec 28, 2018 at 11:07:52AM +0100, Fabian Groffen wrote:

> For a reason yet unclear to me, on Darwin preserving the library
> libreadline.6.dylib fails causing the Prefix to break completely.

Have you applied a fix since Dec 28th? I updated my prefix yesterday and
libreadline.6.dylib was preserved without problems and still is, pending
my fixing clisp:

!!! existing preserved libs:
[...]
>>> package: sys-libs/readline-7.0_p5
 *  - /usr/local/gentoo/usr/lib/libreadline.6.0.3.dylib
 *  - /usr/local/gentoo/usr/lib/libreadline.6.dylib
 *      used by /usr/local/gentoo/usr/lib/clisp-2.49/base/lisp.run (dev-lisp/clisp-2.49-r8)
 *      used by /usr/local/gentoo/usr/lib/clisp-2.49/full/lisp.run (dev-lisp/clisp-2.49-r8)

> Unfortunately, clang still doesn't compile out of the box.

I recompiled 6.0.1 and updated to 7.0.1 without problems, probably
because you've added Michal's patch to the prefix tree.

I did have to apply a small patch to llvm-libunwind, however, to compile
fat to match libc++ and libc++abi:

--- sys-libs/llvm-libunwind/llvm-libunwind-7.0.1.ebuild	2018-12-20 13:56:00.000000000 +0100
+++ sys-libs/llvm-libunwind/llvm-libunwind-7.0.1.ebuild	2019-01-14 15:44:45.000000000 +0100
@@ -81,6 +81,10 @@
 		)
 	fi
 
+	# make sure we build multilib on OSX, because llvm insists on
+	# building multilib too
+	[[ ${CHOST} == *86*-darwin* ]] && mycmakeargs+=( -DCMAKE_OSX_ARCHITECTURES="i386;x86_64" )
+
 	cmake-utils_src_configure
 }

Found the elegant CMAKE_OSX_ARCHITECTURES construct by accident which
seems more elegant than "append-flags -arch i386 -arch x86_64" to me.
-- 
Thanks,
Michael