How about this patch?
The math library is not actually used by anything but the
test suite in Libtool, so as long as the C standard and
common practice put "cos" in -lm it's all good.
ChangeLog entry:
2003-02-05 Robert Boehne <[EMAIL PROTECTED]>
* libtool.m4 (AC_CHECK_LIBM): Search for a real symbol in
the math library rather than 'main', it causes problems for
C++ compilers with certain Auto* tools.
(AC_LIBLTDL_INSTALLABLE): ditto.
Index: libtool.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/libtool.m4,v
retrieving revision 1.297
diff -u -r1.297 libtool.m4
--- libtool.m4 5 Feb 2003 07:03:55 -0000 1.297
+++ libtool.m4 6 Feb 2003 02:50:39 -0000
@@ -2246,10 +2246,10 @@
;;
*-ncr-sysv4.3*)
AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw")
- AC_CHECK_LIB(m, main, LIBM="$LIBM -lm")
+ AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm")
;;
*)
- AC_CHECK_LIB(m, main, LIBM="-lm")
+ AC_CHECK_LIB(m, cos, LIBM="-lm")
;;
esac
])# AC_CHECK_LIBM
@@ -2294,7 +2294,7 @@
# In the future, this macro may have to be called after
AC_PROG_LIBTOOL.
AC_DEFUN([AC_LIBLTDL_INSTALLABLE],
[AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
- AC_CHECK_LIB(ltdl, main,
+ AC_CHECK_LIB(ltdl, lt_dlinit,
[test x"$enable_ltdl_install" != xyes && enable_ltdl_install=no],
[if test x"$enable_ltdl_install" = xno; then
AC_MSG_WARN([libltdl not installed, but installation disabled])
Albert Chin wrote:
>
> On Wed, Feb 05, 2003 at 03:00:39PM -0600, Bob Friesenhahn wrote:
> > I posted a detailed message to [EMAIL PROTECTED] and
> > [EMAIL PROTECTED] but there has been no response at all so I will
> > post again.
> >
> > CVS libtool.m4 contains lines like
> >
> > AC_CHECK_LIB(m, main, LIBM="-lm")
> >
> > and
> >
> > AC_CHECK_LIB(ltdl, main, ... blah
>
> Gross!
>
> > What is the best path forward?
>
> Replace main with a *real* function in one of the libraries.
>
> --
> albert chin ([EMAIL PROTECTED])
>
> _______________________________________________
> Libtool mailing list
> [EMAIL PROTECTED]
> http://mail.gnu.org/mailman/listinfo/libtool
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