don't build doxygen documentation during modular build

libevent.spec

@@ -6,7 +6,7 @@
 
 Name:           libevent
 Version:        2.0.22
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Abstract asynchronous event notification library
 
 Group:          System Environment/Libraries
@@ -14,7 +14,10 @@ License:        BSD
 URL:            http://libevent.org/
 Source0:        https://github.com/libevent/libevent/releases/download/release-%{version}-stable/libevent-%{version}-stable.tar.gz
 
-BuildRequires: doxygen openssl-devel
+%if ! 0%{?_module_build}
+BuildRequires: doxygen
+%endif
+BuildRequires: openssl-devel
 
 # Disable network tests
 Patch01: libevent-nonettests.patch
@@ -56,8 +59,10 @@ This package contains the development documentation for %{name}.
     --disable-dependency-tracking --disable-static
 make %{?_smp_mflags} all
 
+%if ! 0%{?_module_build}
 # Create the docs
 make doxygen
+%endif
 
 %install
 make DESTDIR=$RPM_BUILD_ROOT install
@@ -78,9 +83,11 @@ cat > $RPM_BUILD_ROOT%{_includedir}/event2/event-config.h << EOF
 #endif
 EOF
 
+%if ! 0%{?_module_build}
 mkdir -p $RPM_BUILD_ROOT/%{develdocdir}/html
 (cd doxygen/html; \
 	install -p -m 644 *.* $RPM_BUILD_ROOT/%{develdocdir}/html)
+%endif
 
 mkdir -p $RPM_BUILD_ROOT/%{develdocdir}/sample
 (cd sample; \
@@ -124,6 +131,9 @@ make check
 %{develdocdir}/
 
 %changelog
+* Wed Apr 12 2017 Nils Philippsen <nils@redhat.com> - 2.0.22-4
+- don't build doxygen documentation during modular build
+
 * Mon Mar 27 2017 Tomáš Mráz <tmraz@redhat.com> - 2.0.22-3
 - Make it build with OpenSSL-1.1.0, cherry-picked from upstream git