enable EPEL8 compilation by dropping sphinx docs for now (depends on BZ#1808766)

PDAL.spec

@@ -1,7 +1,7 @@
 Summary:	Point Data Abstraction Library
 Name:		PDAL
 Version:	2.1.0
-Release:	7%{?dist}
+Release:	8%{?dist}
 # The code is licensed BSD except for:
 # - filters/private/csf/* and plugins/i3s/lepcc/* are ASL 2.0
 # - vendor/arbiter/*, plugins/nitf/io/nitflib.h and plugins/oci/io/OciWrapper.* are Expat/MIT
@@ -51,11 +51,17 @@ BuildRequires:	netcdf-cxx-devel
 BuildRequires:	postgresql-devel
 BuildRequires:	postgresql-server
 BuildRequires:	proj-devel
+%if 0%{?fedora}
+# yet missing for EPEL8 BZ#1808766
 BuildRequires:	python3-breathe
+%endif
 BuildRequires:	python3-devel
 BuildRequires:	python3-numpy
 BuildRequires:	python3-sphinx
+%if 0%{?fedora}
+# yet missing for EPEL8
 BuildRequires:	python3-sphinxcontrib-bibtex
+%endif
 BuildRequires:	python3-sphinx_rtd_theme
 BuildRequires:	qhull-devel
 BuildRequires:	sqlite-devel
@@ -149,10 +155,13 @@ rm -rf vendor/{eigen,gtest,pdalboost}
 %make_build
 
 # Build documentation
+%if 0%{?fedora}
+# dependencies yet missing for EPEL8 BZ#1808766
 (
 cd doc
 sphinx-build -b html . build/html
 )
+%endif
 
 %install
 %make_install
@@ -215,10 +224,15 @@ ctest -V
 #%%attr(0644,root,root) %%{_datadir}/proj/*.gtx
 
 %files doc
+%if 0%{?fedora}
 %doc doc/build/html
+%endif
 %license LICENSE.txt
 
 %changelog
+* Wed Jun 03 2020 Markus Neteler <neteler@mundialis.de> 2.1.0-8
+- enable EPEL8 compilation by dropping sphinx docs for now
+
 * Wed Jun 03 2020 Jonathan Wakely <jwakely@redhat.com> - 2.1.0-7
 - Rebuilt for Boost 1.73