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Subject: Re: bug#29224: Solaris, lost mapfiles and silent failures
To: noloader@HIDDEN, 29224 <at> debbugs.gnu.org
References: <CAH8yC8mhLyzAMgRkycWgsT8V-98WDEqVx9C-DRbeCVxf7an+Zw@HIDDEN>
From: Peter Rosin <peda@HIDDEN>
Message-ID: <a2db71df-1179-9bf1-2d27-3c267dc92bda@HIDDEN>
Date: Tue, 21 Nov 2017 16:37:44 +0100
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On 2017-11-09 06:19, Jeffrey Walton wrote:
> I've been tracking an Autotools issue on Solaris 11.3 x86_64 (fully
> patched). The project is a C++ library, and it uses a mapfile to set
> capabilities on executables and shared objects.
>
> The mapfile specifies SSE and SSE2 capabilities. The mapfile is added
> with the linker option '-M mylib.mapfile'. There are no long forms of
> the command. Confer,
> https://docs.oracle.com/cd/E26502_01/html/E29030/ld-1.html.
>
> When the Autotools project builds the library and test program,
> libtool silently drops the mapfile when linking the shared object. It
> just vanishes into the ether. The mapfile is present when building
> test program. Its only missing when building the shared object.
>
> Subsequently, trying to run the test program results in:
>
> $ ./cryptestcwd v
> ld.so.1: cryptestcwd: fatal:
> /export/home/cryptopp/.libs/libcryptopp.so.6: hardware capability
> (CA_SUNW_HW_1) unsupported: 0x4800000 [ AES SSE4.1 ]
> Killed
>
> The failure is silent. libtool does not produce a warning or error
> message stating its removing the option. The documentation does not
> discuss libtool's behavior on Solaris. There's a warning for -M
> options on Cygwin, and I believe that is the extent of it. Solaris is
> certainly not Cygwin. Confer,
> https://www.gnu.org/software/libtool/manual/libtool.html.
>
> We spent the better part of a day trying to trouble shoot the issue.
> Our attention was focused on Automake, and trying to untangle things
> that result in missing AM_LDFLAGS options when linking the shared
> object. The lack of a message probably wasted 6 to 10 man hours.
>
> Please stop removing important options needed to link programs and
> shared objects. The options were specified for a reason and they are
> necessary. If libtool cannot stop removing necessary options, then we
> need (1) a clear message stating what is happening; (2) documentation
> on the behavior; and (3) a way to override the default behavior.
>
> An example of working around the problem would be nice since Autotools
> does not appear to have a post-build or post-link hook. We cut-in an
> awful hack, but it probably runs afoul of Autotools or libtool.
> Confer, https://github.com/noloader/cryptopp-autotools/commit/61828068c6ab.
Your mail is a bit poisonous and seeks to blame others, so I'm not
sure I want to respond. I actually don't know why I'm spending time
on your problem...
But ok, I feel your pain. So, defending Libtool, I don't think the
manual states that linker options are supposed to be transparent. The
whole point of libtool is to hide the particulars of the specific
linker, especially when creating shared libraries. I.e. when using
Lintool, you get to use the options mentioned in the Libtool manual.
Sure, a lot of them are similar and in many cases equivalent to
options for "the real linkers", but it is an error to expect Libtool
to accept the union of all options of all linkers.
BTW, the first (and only) entry in the FAQ is:
"Why does libtool strip link flags when creating a library?"
I suggest you read it. In short, research the -Wc and the -Wl options.
Perhaps "-Wc,-M,mylib.mapfile" or "-Wl,-M,mylib.mapfile" will do?
Cheers,
Peter
bug-libtool@HIDDEN:bug#29224; Package libtool.
Full text available.Received: (at submit) by debbugs.gnu.org; 9 Nov 2017 05:20:07 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Nov 09 00:20:07 2017 Received: from localhost ([127.0.0.1]:59311 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1eCfFz-0004sn-Ov for submit <at> debbugs.gnu.org; Thu, 09 Nov 2017 00:20:07 -0500 Received: from eggs.gnu.org ([208.118.235.92]:42126) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <noloader@HIDDEN>) id 1eCfFx-0004sA-Qd for submit <at> debbugs.gnu.org; Thu, 09 Nov 2017 00:20:02 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <noloader@HIDDEN>) id 1eCfFr-0003Wd-Ny for submit <at> debbugs.gnu.org; Thu, 09 Nov 2017 00:19:56 -0500 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,FREEMAIL_FROM, T_DKIM_INVALID autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:48927) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from <noloader@HIDDEN>) id 1eCfFr-0003WV-Kg for submit <at> debbugs.gnu.org; Thu, 09 Nov 2017 00:19:55 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33096) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <noloader@HIDDEN>) id 1eCfFq-0000PR-CP for bug-libtool@HIDDEN; Thu, 09 Nov 2017 00:19:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <noloader@HIDDEN>) id 1eCfFp-0003Vf-5z for bug-libtool@HIDDEN; Thu, 09 Nov 2017 00:19:54 -0500 Received: from mail-ot0-x232.google.com ([2607:f8b0:4003:c0f::232]:49691) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from <noloader@HIDDEN>) id 1eCfFo-0003UT-WE for bug-libtool@HIDDEN; Thu, 09 Nov 2017 00:19:53 -0500 Received: by mail-ot0-x232.google.com with SMTP id c47so4335408otj.6 for <bug-libtool@HIDDEN>; Wed, 08 Nov 2017 21:19:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:reply-to:from:date:message-id:subject:to; bh=xuTSrXjS/QJpFuXyUG5on1pbxdFqhQbwveOT9ZpToLY=; b=MG6K2pjCQBw10eBNGSGk5d0+ayp7FFU3wku4WT3xRw98jbxX8MkWu6/K/G1unEJDNv dXG0lX8QF7v/JANks8WVFDCdxNksX3trQE480JXHr5TSItJY+hQpSyuAvDxWZaWW16MK O6DieTTyJcWUZq9Un0QZl4lWUTg5SnK7Wy3RsgVhtbdpT++Lurs9QmYs9q5z2iBBxsfp TXZe/Z2Dj5bcDIb/6FjNim7jicrxvCqpW+lt64Xw0w+84KUXtzCtV482CVUwnL/+F1M4 teKaxracgjNXOx9qa0saDpvoMEQfsKRCI1j4cG8PjLoGqeB8wjpBPfoetHSzK9gQBP55 lpMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:reply-to:from:date:message-id :subject:to; bh=xuTSrXjS/QJpFuXyUG5on1pbxdFqhQbwveOT9ZpToLY=; b=m0B8Ji2YTEtwihzJ3Q+ikRakm2jB8jPr1mc3BRwjeEfqhbEGi/zpzUsfswPUoZoJCL EAxtXxXmDoMzGEJxpqErvAWMm68AVySq3ghB7QBrSE+AXGhU2Vs9R9yvyEooK89W/+8v gEL+LVGrUpDnwJGzYrs0SBN7moLzaotHYgiWoLuRQLtshitrOAFgF266MKAaEg8vt42n ASxpUoUjNnN7Cuxys7UcZfNTJVoBSPlv0SCmrhm9IdGBREyic8UH726g96oetmNIls95 aGVLCPf1RNehH+tmQBseUqBaYcyKjwuCUTrpNf/9wXMPmc6Ks1xJ7ukbAXCuwRyITeYK 6Gww== X-Gm-Message-State: AJaThX6TnWy3bfDIEtW3pnFCSFWKZyuh444tArqJkCgdzOTJQqtP2NW8 tdAkAnz/c9w3+0Rfl5JMFZpcM50spbRxpNIaXwI5UYl5 X-Google-Smtp-Source: AGs4zMbako0WBI1tohQWati0+VyH64na3pz5Ztc/hOo8SRxbb7+bAz2dx2AThS+YOwJphFdu4zFmHGvIs1mimxWwkMo= X-Received: by 10.157.17.68 with SMTP id p4mr1567233otp.321.1510204790323; Wed, 08 Nov 2017 21:19:50 -0800 (PST) MIME-Version: 1.0 Received: by 10.74.19.87 with HTTP; Wed, 8 Nov 2017 21:19:49 -0800 (PST) From: Jeffrey Walton <noloader@HIDDEN> Date: Thu, 9 Nov 2017 00:19:49 -0500 Message-ID: <CAH8yC8mhLyzAMgRkycWgsT8V-98WDEqVx9C-DRbeCVxf7an+Zw@HIDDEN> Subject: Solaris, lost mapfiles and silent failures To: bug-libtool@HIDDEN Content-Type: text/plain; charset="UTF-8" X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.0 (----) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Reply-To: noloader@HIDDEN Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -4.0 (----) I've been tracking an Autotools issue on Solaris 11.3 x86_64 (fully patched). The project is a C++ library, and it uses a mapfile to set capabilities on executables and shared objects. The mapfile specifies SSE and SSE2 capabilities. The mapfile is added with the linker option '-M mylib.mapfile'. There are no long forms of the command. Confer, https://docs.oracle.com/cd/E26502_01/html/E29030/ld-1.html. When the Autotools project builds the library and test program, libtool silently drops the mapfile when linking the shared object. It just vanishes into the ether. The mapfile is present when building test program. Its only missing when building the shared object. Subsequently, trying to run the test program results in: $ ./cryptestcwd v ld.so.1: cryptestcwd: fatal: /export/home/cryptopp/.libs/libcryptopp.so.6: hardware capability (CA_SUNW_HW_1) unsupported: 0x4800000 [ AES SSE4.1 ] Killed The failure is silent. libtool does not produce a warning or error message stating its removing the option. The documentation does not discuss libtool's behavior on Solaris. There's a warning for -M options on Cygwin, and I believe that is the extent of it. Solaris is certainly not Cygwin. Confer, https://www.gnu.org/software/libtool/manual/libtool.html. We spent the better part of a day trying to trouble shoot the issue. Our attention was focused on Automake, and trying to untangle things that result in missing AM_LDFLAGS options when linking the shared object. The lack of a message probably wasted 6 to 10 man hours. Please stop removing important options needed to link programs and shared objects. The options were specified for a reason and they are necessary. If libtool cannot stop removing necessary options, then we need (1) a clear message stating what is happening; (2) documentation on the behavior; and (3) a way to override the default behavior. An example of working around the problem would be nice since Autotools does not appear to have a post-build or post-link hook. We cut-in an awful hack, but it probably runs afoul of Autotools or libtool. Confer, https://github.com/noloader/cryptopp-autotools/commit/61828068c6ab. Thanks in advance.
noloader@HIDDEN:bug-libtool@HIDDEN.
Full text available.bug-libtool@HIDDEN:bug#29224; Package libtool.
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