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Re: sed-4.3 build comments

From: Paul Eggert
Subject: Re: sed-4.3 build comments
Date: Fri, 6 Jan 2017 13:42:09 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1

On 01/05/2017 04:18 PM, Nelson H. F. Beebe wrote:
> I want to report a clang
> issue that showed up on surprisingly many platforms, and with multiple
> versions of clang, but not with all clangs on all platforms:  linking
> with lib/xmalloc.o produces this report:
>       lib/libsed.a(xmalloc.o): In function `xnmalloc':
>       lib/xmalloc.c:(.text+0x71): undefined reference to `__muloti4'

Thanks, this turns out to be LLVM bug 16404, an unfixed bug I wish I'd
known. I installed the attached patches to Gnulib to stop using
integer-overflow builtins on Clang, which should work around the LLVM
bug. In the meantime, on Fedora you can work around the sed problem by
installing the Clang-related compiler-rt package and by building with
LDFLAGS=-rtlib=compiler-rt, admittedly quite an annoyance. (I don't know
why Clang sometimes needs special library support to check for size_t

Attachment: 0001-glob-intprops-xalloc-work-around-Clang-bug.patch
Description: Source code patch

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