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From: Jeffrey Walton <>
To: Jeff King <>
Cc: Git List <>
Subject: Re: undefined reference to `pcre_jit_exec'
Date: Thu, 12 Oct 2017 16:34:38 -0400
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, Oct 12, 2017 at 4:10 PM, Jeff King <> 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
>> 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

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.


  reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-12 20:06 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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