GNU bug report logs - #20622
libtool 2.4.6: incorrect linking with tcc under GNU/Linux

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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#20622: closed (libtool 2.4.6: incorrect linking with tcc
 under GNU/Linux)
Date: Fri, 18 Oct 2024 14:48:01 +0000

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Your message dated Fri, 18 Oct 2024 17:46:15 +0300
with message-id <787bfc0f-1da9-40b0-aad3-8b7cfaf85c37 <at> gmail.com>
and subject line Re: bug#20622: libtool 2.4.6: incorrect linking with tcc under GNU/Linux
has caused the debbugs.gnu.org bug report #20622,
regarding libtool 2.4.6: incorrect linking with tcc under GNU/Linux
to be marked as done.

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


-- 
20622: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=20622
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From: Vincent Lefevre <vincent <at> vinc17.net>
To: bug-libtool <at> gnu.org
Subject: libtool 2.4.6: incorrect linking with tcc under GNU/Linux
Date: Thu, 21 May 2015 18:41:07 +0200

I've installed libtool 2.4.6 on my Debian unstable machine in some
non-system directory. When I build GNU MPFR with CC=tcc LD=tcc, I
get things like:

  libtool: link: tcc -O2 -o tzeta_ui tzeta_ui.o  -L../src/.libs ./.libs/libfrtests.a -lm ../src/.libs/libmpfr.so -lgmp

The problem is that the MPFR library used at run time is not
../src/.libs/libmpfr.so but the one installed on the system.

When I use libtool 2.4.2 with the following patch:

--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -4375,6 +4375,14 @@
        _LT_TAGVAR(lt_prog_compiler_pic, $1)='-PIC'
        _LT_TAGVAR(lt_prog_compiler_static, $1)='-Bstatic'
        ;;
+      tcc*)
+       # Fabrice Bellard et al's Tiny C Compiler
+       # When it learns to make shared objects, it will
+       # presumably use -fPIC.
+       _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+       _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+       _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+       ;;
       pgcc* | pgf77* | pgf90* | pgf95* | pgfortran*)
         # Portland Group compilers (*not* the Pentium gcc compiler,
        # which looks to be a dead project)

I get:

  libtool: link: tcc -O2 -o tzeta_ui tzeta_ui.o  -L../src/.libs ./.libs/libfrtests.a -lm ../src/.libs/libmpfr.a -lgmp

(libmpfr.a instead of libmpfr.so) and the problem doesn't occur.

So, either libtool should select libmpfr.a as before or it should
make sure that the correct full path to libmpfr.so be used (something
like run path setting?).

-- 
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)

[Message part 3 (message/rfc822, inline)]

From: Ileana Dumitrescu <ileanadumitrescu95 <at> gmail.com>
To: 20622-done <at> debbugs.gnu.org
Cc: Vincent Lefevre <vincent <at> vinc17.net>
Subject: Re: bug#20622: libtool 2.4.6: incorrect linking with tcc under
 GNU/Linux
Date: Fri, 18 Oct 2024 17:46:15 +0300

[Message part 4 (text/plain, inline)]

Thank you 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=549b52175aa038fb8f5284e9b6dca957e391708b

-- 
Ileana Dumitrescu

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

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