Merged update from upstream sources

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Source: https://src.fedoraproject.org/rpms/liborcus.git#901517e610131d09a28a292f8edcf058b88c7fc4

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

@@ -1,19 +1,30 @@
 %global apiversion 0.16
 
+%if 0%{?rhel}
+
+# build conversion tools
+%bcond_with convtools
+# build python3 bindings
+%bcond_with python
+
+%else
 # build conversion tools
 %bcond_without convtools
 # build python3 bindings
 %bcond_without python
 
+%endif
+
 Name: liborcus
 Version: 0.16.1
-Release: 2%{?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
@@ -187,6 +198,12 @@ 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
+
 * Mon Oct 19 2020 Jeff Law <law@redhat.com> - 0.16.1-2
 - Fix missing headers for gcc-11