Add conditional to work around missing txt2man in el8.

abi-dumper.spec

@@ -30,7 +30,10 @@ BuildRequires:  perl(Getopt::Long)
 BuildRequires:  perl(Storable)
 BuildRequires:  perl(strict)
 BuildRequires:  sed
+# https://bugzilla.redhat.com/show_bug.cgi?id=1741795
+%if ! 0%{?rhel} > 7
 BuildRequires:  txt2man
+%endif
 
 Requires:       elfutils
 Requires:       vtable-dumper >= 1.1
@@ -58,18 +61,22 @@ mkdir -p %{buildroot}%{_prefix}
 
 chmod 0755 %{buildroot}%{_bindir}/%{name}
 
+%if ! 0%{?rhel} > 7
 # Create manpage
 mkdir -p %{buildroot}%{_mandir}/man1
 %{__perl} abi-dumper.pl --help | sed "s|:$||g" | \
   txt2man -t ABI-DUMPER -s 1 -v "User Commands" -r "ABI Dumper %{version}" > \
   %{buildroot}%{_mandir}/man1/%{name}.1
+%endif
 
 
 %files
 %license LICENSE
 %doc README
 %{_bindir}/%{name}
+%if ! 0%{?rhel} > 7
 %{_mandir}/man1/%{name}.1*
+%endif
 
 
 %changelog