From owner-freebsd-hackers@freebsd.org  Tue Jun 30 08:19:03 2015
Return-Path: <owner-freebsd-hackers@freebsd.org>
Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id C51F1990883
 for <freebsd-hackers@mailman.ysv.freebsd.org>;
 Tue, 30 Jun 2015 08:19:03 +0000 (UTC)
 (envelope-from saper@saper.info)
Received: from m.saper.info (m.saper.info [IPv6:2a01:4f8:a0:7383::])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "m.saper.info", Issuer "Marcin Cieslak 2011" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 6335C1FDA
 for <freebsd-hackers@freebsd.org>; Tue, 30 Jun 2015 08:19:03 +0000 (UTC)
 (envelope-from saper@saper.info)
Received: from m.saper.info (saper@m.saper.info [IPv6:2a01:4f8:a0:7383::])
 by m.saper.info (8.14.9/8.14.9) with ESMTP id t5U8J17j043827
 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO)
 for <freebsd-hackers@freebsd.org>; Tue, 30 Jun 2015 08:19:01 GMT
 (envelope-from saper@saper.info)
Received: from localhost (saper@localhost)
 by m.saper.info (8.14.9/8.14.9/Submit) with ESMTP id t5U8J05f043820
 for <freebsd-hackers@freebsd.org>; Tue, 30 Jun 2015 08:19:01 GMT
 (envelope-from saper@saper.info)
X-Authentication-Warning: m.saper.info: saper owned process doing -bs
Date: Tue, 30 Jun 2015 08:19:00 +0000
From: Marcin Cieslak <saper@saper.info>
To: freebsd-hackers@freebsd.org
Subject: Build for profiling? Got //usr/lib/libc_p.a(sbrk.po): undefined
 reference to symbol '_end'
Message-ID: <alpine.BSF.2.11.1506300812150.7491@z.fncre.vasb>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
 <freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-hackers>, 
 <mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers/>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
 <mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 30 Jun 2015 08:19:03 -0000

I am trying to compile https://github.com/sass/libsass instrumented
for profiling. As far as I understand this does not work with clang,
so I am trying with gcc version 4.8.5 20150212 (prerelease) 
(FreeBSD Ports Collection).

This is a shared library in C++ that gets loaded by node (www/node).

I have a world built with profiling libraries, I have additionally
ran "make install INSTALL_PIC_ARCHIVE=yes" in lib/libc, lib/msun
and lib/libcxxrt directories (the latter probably not needed).

Here's config.log output:

configure:3344: checking whether the C++ compiler works
configure:3366: g++48 -pg -g   conftest.cpp  >&5
/usr/local/bin/ld: //usr/lib/libc_p.a(sbrk.po): undefined reference to symbol '_end'
//lib/libc.so.7: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
configure:3370: $? = 1
configure:3408: result: no
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "libsass"
| #define PACKAGE_TARNAME "libsass"
| #define PACKAGE_VERSION "3.2.5-9-gbe07-dirty"
| #define PACKAGE_STRING "libsass 3.2.5-9-gbe07-dirty"
| #define PACKAGE_BUGREPORT "support@moovweb.com"
| #define PACKAGE_URL ""
| #define PACKAGE "libsass"
| #define VERSION "3.2.5-9-gbe07-dirty"
| /* end confdefs.h.  */
|
| int
| main ()
| {
|
|   ;
|   return 0;
| }


~Marcin