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What should I do to remove the errors?

Configuring autoconf
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
configure: autobuild project... GNU Autoconf
configure: autobuild revision... 2.69
configure: autobuild hostname... ubuntu
configure: autobuild timestamp... 20201210T134401Z
checking whether /bin/sh -n is known to work... no
checking for characters that cannot appear in file names... none
checking whether directories can have trailing spaces... yes
checking for expr... /usr/bin/expr
checking for GNU M4 that supports accurate traces... configure: error: no
acceptable m4 could be found in $PATH.
GNU M4 1.4.6 or later is required; 1.4.16 or newer is recommended.
GNU M4 1.4.15 uses a buggy replacement strstr on some systems.
Glibc 2.9 - 2.12 and GNU M4 1.4.11 - 1.4.15 have another strstr bug.

Thank you.

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<div dir=3D"ltr"><div>What should I do to remove the errors?</div><div><br>=
</div><div>Configuring autoconf<br>checking for a BSD-compatible install...=
 /usr/bin/install -c<br>checking whether build environment is sane... yes<b=
r>checking for a thread-safe mkdir -p... /usr/bin/mkdir -p<br>checking for =
gawk... no<br>checking for mawk... mawk<br>checking whether make sets $(MAK=
E)... yes<br>checking build system type... x86_64-unknown-linux-gnu<br>chec=
king host system type... x86_64-unknown-linux-gnu<br>configure: autobuild p=
roject... GNU Autoconf<br>configure: autobuild revision... 2.69<br>configur=
e: autobuild hostname... ubuntu<br>configure: autobuild timestamp... 202012=
10T134401Z<br>checking whether /bin/sh -n is known to work... no<br>checkin=
g for characters that cannot appear in file names... none<br>checking wheth=
er directories can have trailing spaces... yes<br>checking for expr... /usr=
/bin/expr<br>checking for GNU M4 that supports accurate traces... configure=
: error: no acceptable m4 could be found in $PATH.<br>GNU M4 1.4.6 or later=
 is required; 1.4.16 or newer is recommended.<br>GNU M4 1.4.15 uses a buggy=
 replacement strstr on some systems.<br>Glibc 2.9 - 2.12 and GNU M4 1.4.11 =
- 1.4.15 have another strstr bug.</div><div><br></div><div>Thank you.<br></=
div></div>

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