[...]

  echo 'TAB$(PERL) $(top_srcdir)/doc/gdoc -texinfo $(GDOC_TEXI_EXTRA_ARGS) $< > $@' | sed "s/TAB/	/" >> Makefile.gdoc; \
  echo >> Makefile.gdoc; \
  functions=` ./gdoc -listfunc $file`; \
  for function in $functions; do \
    echo "# $shortfile: $function" >> Makefile.gdoc; \
    echo "gdoc_TEXINFOS += texi/$function.texi" >> Makefile.gdoc; \
    echo "texi/$function.texi: $file" >> Makefile.gdoc; \
    echo 'TABmkdir -p `dirname $@`' | sed "s/TAB/	/" >> Makefile.gdoc; \
    echo 'TAB$(PERL) $(top_srcdir)/doc/gdoc -texinfo $(GDOC_TEXI_EXTRA_ARGS) -function'" $function"' $< > $@' | sed "s/TAB/	/" >> Makefile.gdoc; \
    echo >> Makefile.gdoc; \
    echo "gdoc_MANS += man/$function.3" >> Makefile.gdoc; \
    echo "man/$function.3: $file" >> Makefile.gdoc; \
    echo 'TABmkdir -p `dirname $@`' | sed "s/TAB/	/" >> Makefile.gdoc; \
    echo 'TAB$(PERL) $(top_srcdir)/doc/gdoc -man $(GDOC_MAN_EXTRA_ARGS) -function'" $function"' $< > $@' | sed "s/TAB/	/" >> Makefile.gdoc; \
    echo >> Makefile.gdoc; \
  done; \
  echo >> Makefile.gdoc; \
done
make[2]: Leaving directory '/tmp/B.c0a_ifug/BUILD/libidn2-2.3.2/doc'
/usr/bin/make Makefile
 cd .. && /bin/sh /tmp/B.c0a_ifug/BUILD/libidn2-2.3.2/build-aux/missing automake-1.16 --foreign doc/Makefile
 cd .. && /bin/sh ./config.status doc/Makefile 
config.status: creating doc/Makefile
make[3]: 'Makefile' is up to date.
 cd .. && /bin/sh /tmp/B.c0a_ifug/BUILD/libidn2-2.3.2/build-aux/missing automake-1.16 --foreign doc/Makefile
 cd .. && /bin/sh ./config.status doc/Makefile 
config.status: creating doc/Makefile
make[2]: Entering directory '/tmp/B.c0a_ifug/BUILD/libidn2-2.3.2/doc'
/bin/sh '/tmp/B.c0a_ifug/BUILD/libidn2-2.3.2/build-aux/missing' help2man --include=./idn2.h2m \
	--output=idn2.1 ../src/idn2
Can't locate Locale/gettext.pm in @INC (you may need to install the Locale::gettext module) (@INC contains: /usr/local/lib/perl5/5.34.0/i686-tld-linux-thread-multi /usr/local/share/perl5 /usr/lib/perl5/vendor_perl/5.34.0/i686-tld-linux-thread-multi /usr/share/perl5/vendor_perl /usr/lib/perl5/5.34.0/i686-tld-linux-thread-multi /usr/share/perl5/5.34.0) at /usr/bin/help2man line 29.
BEGIN failed--compilation aborted at /usr/bin/help2man line 29.
make[2]: *** [Makefile:2107: idn2.1] Error 2
make[2]: Leaving directory '/tmp/B.c0a_ifug/BUILD/libidn2-2.3.2/doc'
make[1]: *** [Makefile:1401: all-recursive] Error 1
make: *** [Makefile:1309: all] Error 2
error: Bad exit status from /tmp/B.c0a_ifug/BUILD/tmp/rpm-tmp.BzJzHV (%build)
RPM build errors:
    Bad exit status from /tmp/B.c0a_ifug/BUILD/tmp/rpm-tmp.BzJzHV (%build)
ended at: Sun Apr  3 10:52:08 2022, done in 0:00:49.559822
error: No files produced.
+ chmod -R u+rwX /tmp/B.c0a_ifug/BUILD
+ rm -rf /tmp/B.c0a_ifug/tmp /tmp/B.c0a_ifug/BUILD
+ rm -rf /tmp/B.c0a_ifug
Begin-TLD-Builder-Info
Build-Time: user:48.49s sys:13.20s real:50.65s (faults io:36 non-io:2737512)
End-TLD-Builder-Info