Build errors - bad fd number

[Colin Baxter <m43cap@xxxxxxxxxx>]

Hello,

After cloning emacs-w3m git repository, I get a bad fd number error.

Output of `autoconf <RET>':

/usr/bin/m4:configure.in:5: non-numeric argument to builtin `substr'
/usr/bin/m4:configure.in:7: non-numeric argument to builtin `substr'

Output of `./configure <RET>':

creating cache ./config.cache
checking whether make sets ${MAKE}... yes
checking for a BSD compatible install... /usr/bin/install -c
checking for makeinfo... makeinfo
checking if makeinfo version >= 6.3... no (texi2any (GNU texinfo) 6.5)
checking for texi2pdf... texi2pdf
checking if texi2pdf version >= 6.3... no (texi2pdf (GNU Texinfo 6.5) 7842)
checking for egrep... egrep
checking for cygpath... no
checking for emacs... /home/redknight/local/bin/emacs
checking what a flavor does /home/redknight/local/bin/emacs have... ./configure: 1069: ./configure: Syntax error: Bad fd number

I'm using:
emacs-26.1; Autoconf version 2.13; m4 macro processor version 1.4.17.

My system is:
3.16.0-7-686-pae #1 SMP Debian 3.16.59-1 (2018-10-03) i686 GNU/Linux.

Best wishes,

-- 
Colin Baxter
m43cap@xxxxxxxxxx