Powtórzenie ./autogen.sh nie zwróciło żadnego błędu:

configure: creating ./config.status
config.status: creating dieharder_version.h
config.status: creating dieharder.spec
config.status: creating dieharder.html
config.status: creating dieharder-config
config.status: creating dieharder/Makefile
config.status: creating include/Makefile
config.status: creating libdieharder/Makefile
config.status: creating manual/Makefile
config.status: creating manual/macros.tex
config.status: creating Makefile
config.status: creating config.h
config.status: config.h is unchanged
config.status: executing depfiles commands
config.status: executing libtool commands
====================================================
==============

Makefile should be built, and ./configure --prefix=/usr should be
completed. You may rerun configure with a different e.g.
--prefix if you want to put dieharder someplace else. Otherwise
you should be able to make, make install, or make rpm.

====================================================
==============

Ale make zwróciło:

(cd libdieharder; \
make)
make[1]: Entering directory '/mnt/c/Users/omnia/Desktop/Diehard/libdieharder'
/bin/bash ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I..
-DVERSION=3.31.1 -DLITTLE_ENDIAN=1 -I ../include -I /usr/include -std=c99 -Wall
-pedantic -g -O2 -MT libdieharder_la-bits.lo -MD -MP -MF
.deps/libdieharder_la-bits.Tpo -c -o libdieharder_la-bits.lo `test -f 'bits.c' ||
echo './'`bits.c
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I.. -DVERSION=3.31.1 -DLITTLE_ENDIAN=1 -I
../include -I /usr/include -std=c99 -Wall -pedantic -g -O2 -MT
libdieharder_la-bits.lo -MD -MP -MF .deps/libdieharder_la-bits.Tpo -c bits.c -fPIC
-DPIC -o .libs/libdieharder_la-bits.o
In file included from ../include/dieharder/libdieharder.h:22,
from bits.c:7:
/usr/include/unistd.h:1041:20: error: unknown type name 'intptr_t'
1041 | extern void *sbrk (intptr_t __delta) __THROW;
| ^~~~~~~~
bits.c: In function 'fill_uint_buffer':
bits.c:407:15: warning: variable 'bufbits' set but not used
[-Wunused-but-set-variable]
407 | unsigned int bufbits,bdelta;
| ^~~~~~~
make[1]: *** [Makefile:764: libdieharder_la-bits.lo] Error 1
make[1]: Leaving directory '/mnt/c/Users/omnia/Desktop/Diehard/libdieharder'
make: *** [Makefile:948: libwulf.time] Error 2