Re: autoconf 2.52a-1: M4PATH not being honoured through wrapper script.

[Charles Wilson <cwilson at ece dot gatech dot edu>]

Thanks for the report.  I'll try to get around to this soon, and will 
release new versions of the wrappers.

--Chuck

James Harvey wrote:

> I've been converting some of our build system to use the cygwin autotools
> recently, and I think I've come across a bug in the autoconf/autoheader
> wrapper scripts (I assume these may occur in the other auto* scripts, but
> these are the specific ones I use).
> 
> Our build script sets up M4PATH to the location of some company-specific m4
> macro files before calling autoconf; on every other UNIX we've come across,
> this works fine for autoconf and also autoheader.
> 
> However, the cygwin wrappers explicitly redefine M4PATH *without* including
> the original value; this is after adding to PATH in the expected way.
> 
> I don't quite understand this; the m4 documentation says M4PATH is a
> colon-separated list of directory names, and I'm pretty sure it shouldn't
> just be redefined in this way.
> 
> I've appended a patch for the autoconf wrapper; if I'm correct this'll need
> to be applied to all the other wrapper scripts that need the extra m4 path
> themselves.
> 
> Another problem I've found is that the check for AC_PREREQ in the autotools
> wrappers only searches through configure.in and not any m4 files that might
> be included from it. This means I have to add this line to a number of
> different configure.in files rather than just changing one of the
> company-specific m4 files. I can't think of an easy fix for this, though.
> 
> Cheers,
> 
> -James Harvey
> 
> --- autoconf    Mon Feb 25 17:04:37 2002
> +++ autoconf~   Mon Feb 25 15:25:15 2002
> @@ -200,14 +200,14 @@
>  if [ "x${VER_MIN}" != "x" ] ; then
>    if (( ${VER_MIN} <= 13 )) ; then
>      export PATH=${AUTO_STABLE}/bin:${PATH}
> +    export M4PATH=${AUTO_STABLE}/share/autoconf:${M4PATH}
> -    export M4PATH=${AUTO_STABLE}/share/autoconf
>    else
>      export PATH=${AUTO_DEVEL}/bin:${PATH}
> +    export M4PATH=${AUTO_DEVEL}/share/autoconf:${M4PATH}
> -    export M4PATH=${AUTO_DEVEL}/share/autoconf
>    fi
>  else
>    export PATH=${AUTO_DEVEL}/bin:${PATH}
> +  export M4PATH=${AUTO_DEVEL}/share/autoconf:${M4PATH}
> -  export M4PATH=${AUTO_DEVEL}/share/autoconf
>  fi
> 
>  # exec the "real" autoconf
> 
> 
> 
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