Re: aclocal using automake Automake::XFile

[not really an m4 problem, so future replies can be to just automake]

On 12/08/2015 02:51 AM, Arkadiusz Miśkiewicz wrote:
> 
> Hello.
> 
> Using
> m4 (GNU M4) 1.4.17
> automake (GNU automake) 1.15
> 
>  /usr/bin/aclocal contains code:
> 
> $traces .= " --language Autoconf-without-aclocal-m4 ";
> $traces = "echo '$early_m4_code' | $traces - ";
> ...
> verb "running $traces $configure_ac";
> 
> my $tracefh = new Automake::XFile ("$traces $configure_ac |");

Can you try 'aclocal --verbose', to get the "running ..." output line
produced just before the failed XFile() creation attempt?

> 
> which fails here:
> $ cd libgii-2.2.2; LC_ALL=C aclocal
> aclocal: error: cannot open echo 'm4_define([m4_require_silent_probe], [-])' 
> |... --trace='AM_AUTOMAKE_VERSION:$f::$n' configure.ac |: No such file or 
> directory


Huh - it sounds like your version of perl is trying to open a literal
file named 'echo ... | autom4te ... autoconf.ac |' , instead of properly
opening a subshell command that feeds echo to autom4te then collects the
output of autom4te (basically, Automake::XFile() is trying to do the
equivalent of a popen() on a shell command).

> Tried small script to reproduce and it also fails:
> 
> #!/usr/bin/perl
> 
> BEGIN {
>         push ( @INC,"/usr/share/automake");
> }
> 
> use strict;
> 
> use Automake::XFile;
> 
> my $traces = "echo 'zupa'";
> my $tracefh = new Automake::XFile ("$traces");
> 
> $ LC_ALL=C perl a1.pl
> a1.pl: error: cannot open echo 'zupa': No such file or directory

Not quite the same, if you don't actually have a file named 'zupa'
handy; and particularly since the aclocal usage is trying to use perl's
open("command |") notation, not open("file") notation.  Could it also be
a problem with your particular build of perl, or maybe a newer version
of perl has introduced some backwards incompatible change that
autoconf/automake now need to work with?

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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