GNU bug report logs - #21309
libtool should not use the dangerous, undocumented AC_TRY_EVAL macro, currently broken

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ileana Dumitrescu <ileanadumitrescu95 <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#21309: closed (libtool should not use the dangerous,
 undocumented AC_TRY_EVAL macro, currently broken)
Date: Fri, 18 Oct 2024 14:53:02 +0000

[Message part 1 (text/plain, inline)]

Your message dated Fri, 18 Oct 2024 17:50:35 +0300
with message-id <c4b403fa-c5c8-4982-afe9-4bbdb4ad1a70 <at> gmail.com>
and subject line Re: bug#21309: libtool generates binary data in config.log due to buggy escaping
has caused the debbugs.gnu.org bug report #21309,
regarding libtool should not use the dangerous, undocumented AC_TRY_EVAL macro, currently broken
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
21309: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=21309
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Vincent Lefevre <vincent <at> vinc17.net>
To: bug-libtool <at> gnu.org
Subject: libtool generates binary data in config.log due to buggy escaping
Date: Thu, 20 Aug 2015 03:56:02 +0200

I've reported the following bug in the Debian BTS:

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=796180

but I can reproduce it with the official libtool 2.4.6.

When I run "./configure" with MPFR, the generated config.log file
contains binary data:

configure:9458: /usr/bin/nm -B conftest.o \| sed -n -e 's/^.*[ ]\([ABCDGIRSTW][ABCDGIRSTW]*\)[ ][ ]*\([_A-Za-z][_A-Za-z0-9]*\)$/^A ^B ^B/p' | sed '/ __gnu_lto/d' \> conftest.nm

where ^A and ^B are the ASCII characters of code 1 and 2 respectively.
Thus, the "file" utility thinks that this is a binary file, so that
"less" + "lesspipe" mangles the file. Rather annoying!

The generated "libtool" script contains:

global_symbol_pipe="sed -n -e 's/^.*[    ]\\([ABCDGIRSTW][ABCDGIRSTW]*\\)[       ][      ]*\\([_A-Za-z][_A-Za-z0-9]*\\)\$/\\1 \\2 \\2/p' | sed '/ __gnu_lto/d'"

So, I suppose that the binary data come from the \\1 and \\2.

-- 
Vincent Lefèvre <vincent <at> vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

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From: Ileana Dumitrescu <ileanadumitrescu95 <at> gmail.com>
To: 21309-done <at> debbugs.gnu.org
Cc: Vincent Lefevre <vincent <at> vinc17.net>
Subject: Re: bug#21309: libtool generates binary data in config.log due to
 buggy escaping
Date: Fri, 18 Oct 2024 17:50:35 +0300

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Thank you (again :) for the bug report and patch!

The fix you provided has been applied to the development branch:
https://git.savannah.gnu.org/cgit/libtool.git/commit/?h=development&id=f7d11c71dbf23b6a7bc8a273782d3aa3dab08b23

-- 
Ileana Dumitrescu

GPG Public Key: FA26 CA78 4BE1 8892 7F22 B99F 6570 EA01 146F 7354

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