Re: STDCXX issue

[Vincent Blondel]

 Thank You for your help
It works now
Vincent

On Tue, Jan 21, 2020 at 4:37 PM Zack Weinberg <address@hidden> wrote:

> On Tue, Jan 21, 2020 at 10:18 AM Zack Weinberg <address@hidden> wrote:
> >
> > The `aclocal` program (which is run by autoreconf) is supposed to
> > generate aclocal.m4, though.  I strongly suspect the missing AC_INIT
> > is the problem here.
>
> Following up on this, if I run autoreconf -vif on Vincent's original
> configure.ac+Makefile.am+m4 directory (also with dummy NEWS README
> COPYING AUTHORS ChangeLog files), I get errors:
>
> $ autoreconf --version
> autoreconf (GNU Autoconf) 2.69
> Copyright (C) 2012 Free Software Foundation, Inc.
> [etc]
>
> $ autoreconf -vif
> autoreconf: Entering directory `.'
> autoreconf: configure.ac: not using Autoconf
> autoreconf: Leaving directory `.'
>
> [autoreconf should probably exit unsuccessfully when that happens, but
> that's a side issue.]  Individual autotools commands also fail:
>
> $ aclocal -I m4
> configure.ac:8: error: AC_INIT should be called with package and
> version arguments
> /usr/share/aclocal-1.16/init.m4:29: AM_INIT_AUTOMAKE is expanded from...
> configure.ac:8: the top level
> autom4te: /usr/bin/m4 failed with exit status: 1
> aclocal: error: echo failed with exit status: 1
>
> (aclocal does exit unsuccessfully in this case, and aclocal.m4 is not
> created)
>
> $ automake --add-missing
> configure.ac:9: error: m4_defn: undefined macro: _AC_LANG
> ../../lib/autoconf/lang.m4:107: AC_LANG_POP is expanded from...
> ../../lib/autoconf/c.m4:448: AC_PROG_CC is expanded from...
> configure.ac:9: the top level
> autom4te: /usr/bin/m4 failed with exit status: 1
> automake: error: autoconf failed with exit status: 1
>
> (automake exits unsuccessfully and Makefile.in is not created)
>
> $ autoconf
> configure.ac:9: error: m4_defn: undefined macro: _AC_LANG
> ../../lib/autoconf/lang.m4:107: AC_LANG_POP is expanded from...
> ../../lib/autoconf/c.m4:448: AC_PROG_CC is expanded from...
> configure.ac:9: the top level
> autom4te: /usr/bin/m4 failed with exit status: 1
>
> (autoconf exits unsuccessfully and configure is not created)
>
> If I make this change to configure.ac, on the other hand, autoreconf
> -vif completes successfully and the generated configure script runs
> fine:
>
> diff -u configure.ac.old configure.ac
> --- configure.ac.old    2020-01-21 10:31:26.816736978 -0500
> +++ configure.ac    2020-01-21 10:31:34.536537740 -0500
> @@ -1,8 +1,5 @@
>  AC_CONFIG_MACRO_DIRS([m4])
> -m4_pattern_allow([AC_PROG_CC_C99])
> -m4_include([m4/ax_check_compile_flag.m4])
> -m4_include([m4/ax_cxx_compile_stdcxx.m4])
> -m4_include([m4/ax_cxx_compile_stdcxx_11.m4])
> +AC_INIT([demo],[1.0])
>  AC_CONFIG_SRCDIR(configure.ac)
>  AM_CONFIG_HEADER(config.h)
>  AM_INIT_AUTOMAKE
>
> So it appears to me that the whole problem really was the lack of an
> AC_INIT, and that explicit m4_include invocations are *not* necessary.
>
> (The warnings about use of obsolete macros AM_CONFIG_HEADER and
> AC_PROG_LIBTOOL should still be fixed, but that's much less
> important.)
>
> zw
>