after I enter ./configure, I get the following output

[Mike Jones]

checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ANSI C... (cached) none needed
checking dependency style of gcc... (cached) gcc3
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ANSI C... (cached) none needed
checking dependency style of gcc... (cached) gcc3
checking for flex... no
checking for lex... no
checking for yywrap in -lfl... no
checking for yywrap in -ll... no
checking for bison... no
checking for byacc... no
checking for ranlib... ranlib
checking for gm4... no
checking for gnum4... no
checking for m4... /usr/bin/m4
checking whether m4 supports frozen files... no
configure: error: GNU M4 1.4 is required


I have built and installed GNU M4 1.4.4.


address@hidden /home/mwjones/bison-2.1 > ls -la /usr/local/bin/m4
-rwxr-xr-x   1 root     system       503232 Jan 19 09:25 /usr/local/bin/m4


What is going wrong.