From: Jeffrey Walton <noloader@gmail.com>
To: Jeff King <peff@peff.net>
Cc: Git List <git@vger.kernel.org>
Subject: Re: undefined reference to `pcre_jit_exec'
Date: Thu, 12 Oct 2017 16:34:38 -0400 [thread overview]
Message-ID: <CAH8yC8nHpdA+fX3pcaLRzEYwTCmoxF3NKSh6SUkORZuEvg0JGA@mail.gmail.com> (raw)
In-Reply-To: <20171012201023.wrfbs7p7lups5glz@sigill.intra.peff.net>
On Thu, Oct 12, 2017 at 4:10 PM, Jeff King <peff@peff.net> wrote:
> On Thu, Oct 12, 2017 at 04:06:11PM -0400, Jeffrey Walton wrote:
>
>> I have a script to build Git on some old platforms to ease testing.
>> Old platforms include CentOS 5. The script is available at
>> https://github.com/noloader/Build-Scripts/blob/master/build-ssh.sh.
>>
>> It looks like something got knocked loose recently. I'm seeing several
>> of these when building with PCRE 8.41 with Git 2.14.2. Old and new
>> platforms are witnessing it. I observe it on CentOS 5 with GCC 4.1;
>> and Fedora 26 with GCC 7.2.
>>
>> ...
>> LINK git-credential-store
>> libgit.a(grep.o): In function `pcre1match':
>> grep.c:(.text+0x1219): undefined reference to `pcre_jit_exec'
>> collect2: error: ld returned 1 exit status
>> make: *** [Makefile:2145: git-credential-store] Error 1
>
> Maybe:
>
> $ git grep -h -B5 -A1 pcre_jit Makefile
> # When using USE_LIBPCRE1, define NO_LIBPCRE1_JIT if the PCRE v1
> # library is compiled without --enable-jit. We will auto-detect
> # whether the version of the PCRE v1 library in use has JIT support at
> # all, but we unfortunately can't auto-detect whether JIT support
> # hasn't been compiled in in an otherwise JIT-supporting version. If
> # you have link-time errors about a missing `pcre_jit_exec` define
> # this, or recompile PCRE v1 with --enable-jit.
Ah, thanks. A quick search did not find that comment. And it did not
occur to me to re-run --help to read about it.
> It looks like autoconf turns on USE_LIBPCRE1, but isn't smart enough to
> test NO_LIBPCRE1_JIT.
If Git wants Jit, then I am inclined to configure PCRE to provide it.
A quick question if you happen to know... Does PCRE Jit cause a loss
of NX-stacks? If it causes a loss of NX-stacks, then I think I prefer
to disable it.
Jeff
next prev parent reply other threads:[~2017-10-12 20:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-12 20:06 undefined reference to `pcre_jit_exec' Jeffrey Walton
2017-10-12 20:10 ` Jeff King
2017-10-12 20:34 ` Jeffrey Walton [this message]
2017-10-12 20:38 ` Jeff King
2017-10-12 21:00 ` Jeffrey Walton
2017-10-12 21:05 ` Ævar Arnfjörð Bjarmason
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