fix build without libixion under rhel

liborcus-noexamples.patch

@@ -0,0 +1,8 @@
+--- a/Makefile.am	2018-09-14 22:51:18.000000000 +0100
++++ b/Makefile.am	2020-03-17 15:37:37.493186784 +0000
+@@ -1,4 +1,4 @@
+-SUBDIRS = src include benchmark	doc_example
++SUBDIRS = src include benchmark
+ ACLOCAL_AMFLAGS = -I m4
+ 
+ pcfiles = liborcus-@ORCUS_API_VERSION@.pc

liborcus.spec

@@ -17,13 +17,14 @@
 
 Name: liborcus
 Version: 0.16.1
-Release: 3%{?dist}
+Release: 4%{?dist}
 Summary: Standalone file import filter library for spreadsheet documents
 
 License: MPLv2.0
 URL: https://gitlab.com/orcus/orcus
 Source0: https://kohei.us/files/orcus/src/%{name}-%{version}.tar.xz
 Patch0:  %{name}-gcc11.patch
+Patch1:  liborcus-noexamples.patch
 
 BuildRequires: boost-devel
 BuildRequires: doxygen
@@ -197,6 +198,9 @@ make check %{?_smp_mflags}
 %doc doc/_doxygen/html
 
 %changelog
+* Tue Dec 08 2020 Caolán McNamara <caolanm@redhat.com> - 0.16.1-4
+- fix build without libixion under rhel
+
 * Wed Dec 02 2020 Caolán McNamara <caolanm@redhat.com> - 0.16.1-3
 - build without libixion under rhel