You might have installed it for specific compatibility with something you were working with.
-rwxrwxrwx 1 root root 43352 2019-03-29 14:24:20.441434200 +0100 aclocal.m4
-rwxrwxrwx 1 root root 5479 2019-03-29 14:24:20.440919100 +0100
configure.ac-rwxrwxrwx 1 root root 2817 2019-03-29 14:24:20.402674700 +0100 Makefile.am
-rwxrwxrwx 1 root root 36670 2019-03-29 14:24:20.402541500 +0100 Makefile.in
-rwxrwxrwx 1 root root 1733 2019-03-29 14:24:20.212225400 +0100 m4/times.m4
-rwxrwxrwx 1 root root 2927 2019-03-29 14:24:20.212094200 +0100 m4/rusage.m4
-rwxrwxrwx 1 root root 1385 2019-03-29 14:24:20.211987000 +0100 m4/proto.m4
-rwxrwxrwx 1 root root 1014 2019-03-29 14:24:20.211902500 +0100 m4/perror.m4
-rwxrwxrwx 1 root root 1593 2019-03-29 14:24:20.211799700 +0100 m4/param.m4
-rwxrwxrwx 1 root root 6126 2019-03-29 14:24:20.211684500 +0100 m4/lt~obsolete.m4
-rwxrwxrwx 1 root root 690 2019-03-29 14:24:20.211578000 +0100 m4/ltversion.m4
-rwxrwxrwx 1 root root 4372 2019-03-29 14:24:20.211488200 +0100 m4/ltsugar.m4
-rwxrwxrwx 1 root root 12347 2019-03-29 14:24:20.211271400 +0100 m4/ltoptions.m4
-rwxrwxrwx 1 root root 1474 2019-03-29 14:24:20.210860500 +0100 m4/longlong.m4
-rwxrwxrwx 1 root root 1204 2019-03-29 14:24:20.210763800 +0100 m4/longdouble.m4
-rwxrwxrwx 1 root root 286727 2019-03-29 14:24:20.210590800 +0100 m4/libtool.m4
-rwxrwxrwx 1 root root 286727 2019-03-29 14:24:20.210590800 +0100 m4/libtool.m4
-rwxrwxrwx 1 root root 6686 2019-03-29 14:24:20.206511400 +0100 m4/lib-prefix.m4
-rwxrwxrwx 1 root root 6686 2019-03-29 14:24:20.206511400 +0100 m4/lib-prefix.m4
-rwxrwxrwx 1 root root 26788 2019-03-29 14:24:20.206402700 +0100 m4/lib-link.m4
-rwxrwxrwx 1 root root 3417 2019-03-29 14:24:20.206131300 +0100 m4/lib-ld.m4
-rwxrwxrwx 1 root root 12535 2019-03-29 14:24:20.206046900 +0100 m4/intparam.m4
-rwxrwxrwx 1 root root 5011 2019-03-29 14:24:20.205877000 +0100 m4/gmp.m4
-rwxrwxrwx 1 root root 1563 2019-03-29 14:24:20.205772200 +0100 m4/gettimeofday.m4
-rwxrwxrwx 1 root root 7965 2019-03-29 14:24:20.205681400 +0100 m4/general.m4
-rwxrwxrwx 1 root root 5242 2019-03-29 14:24:20.205520300 +0100 m4/floatparam.m4
-rwxrwxrwx 1 root root 1635 2019-03-29 14:24:20.205400700 +0100 m4/cc.m4
-rwxrwxrwx 1 root root 1224 2019-03-29 14:24:20.205315100 +0100 m4/as-underscore.m4
-rwxrwxrwx 1 root root 1669 2019-03-29 14:24:20.205233200 +0100 m4/alloca.m4
Makefile.in isn't the newest file at the moment, however, when reproducing the error I always used a fresh extraction from the tarball.
All files are on /dev/sda1, which wasn't full at any time during building.