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Date: Mon, 06 May 2013 12:30:00 -0000
Message-Id: <201305061230.r46CU0P4006086@glazunov.sibelius.xs4all.nl>
From: Mark Kettenis <mark.kettenis@xs4all.nl>
To: pavel.v.chupin@gmail.com
CC: gdb-patches@sourceware.org
In-reply-to:	<CANwJu18MP86hi3etqskPSR3Pt6tPEZCSndzW2No_9ZHEig0AHQ@mail.gmail.com>	(message from Pavel Chupin on Mon, 6 May 2013 15:28:14 +0400)
Subject: Re: [PATCH] gdb/configure: Replace hardcoded -ldl with check based on dlfcn.h availability
References: <CANwJu1-LGhEaeA3Mmi37UkLZOAqEFpzFpKaKzL3MVA2WORdR7Q@mail.gmail.com> <CANwJu18MP86hi3etqskPSR3Pt6tPEZCSndzW2No_9ZHEig0AHQ@mail.gmail.com>
X-SW-Source: 2013-05/txt/msg00111.txt.bz2

> Date: Mon, 6 May 2013 15:28:14 +0400
> From: Pavel Chupin <pavel.v.chupin@gmail.com>
> 
> On Wed, Apr 17, 2013 at 3:21 PM, Pavel Chupin <pavel.v.chupin@gmail.com> wrote:
> > Hi,
> > Attached patch adds check for dlfcn.h header availability before
> > adding -ldl to some configure commands. Otherwise on some
> > configuration -ldl is added unconditionally even though it's not
> > required and gdb is configured without ELF support due to failed link.
> >
> > Issue is found on mingw gdb build for Android.
> >
> > gdb/ChangeLog entry:
> > 2013-04-16  Pavel Chupin  <pavel.v.chupin@intel.com>
> >
> >         Replace hardcoded -ldl with check based on dlfcn.h availability
> >         * configure.ac: Add dlfcn.h check and DLOPEN_LIBS def.
> >         * acinclude.m4: Use DLOPEN_LIBS instead of hardcode.
> >         * configure: Regenerate.
> >
> 
> Ping

The fix isn't quite right.  OpenBSD for example has <dlfcn.h> but no
libdl; dlopen(3) and friends live in libc.