From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27407 invoked by alias); 8 Feb 2011 21:04:12 -0000 Received: (qmail 27382 invoked by uid 22791); 8 Feb 2011 21:04:11 -0000 X-SWARE-Spam-Status: No, hits=-2.6 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_BG X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 08 Feb 2011 21:04:07 +0000 From: "pogma at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/47032] libgfortran references complex long double functions missing on AIX X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Keywords: build X-Bugzilla-Severity: normal X-Bugzilla-Who: pogma at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Tue, 08 Feb 2011 21:04:00 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-02/txt/msg01095.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47032 --- Comment #10 from Peter O'Gorman 2011-02-08 21:03:46 UTC --- (In reply to comment #9) > > > > AC_CHECK_LIB([m],[copysignl],[AC_DEFINE([HAVE_COPYSIGNL],[1],\ > > > > [libm includes copysignl])]) > So, for the AC_CHECK_LIB line above, what does the > AC_LINK_IFELSE patch look like. Totally untested - something like: gcc_save_LIBS="$LIBS" LIBS="$LIBS -lm" AC_LINK_IFELSE([AC_LANG_PROGRAM([#include ],[return (int)copysignl(-1.0,1.0);])],[AC_DEFINE([HAVE_COPYSIGNL],[1],[libm includes copysignl])]) LIBS="$gcc_save_LIBS" AIX's math.h has, conditional on 128 bit longdoubles: #define copysignl(__x, __y) __copysignl128((long double) (__x), (long double) (__y)) And libm does indeed have a copysignl symbol (but it's missing __copysignl128), so AC_CHECK_LIB says "yes, libm has copysignl", because it just checks if the symbol exists in the library. #including math.h and then trying a link test should give correct results because it will fail to find __copysignl128 in libm