build and run demos in check section

suitesparse.spec

@@ -402,6 +402,17 @@ find */ -iname lesser.txt -o -iname license.txt -o -iname gpl.txt -o \
 # hardlink duplicate documentation files
 hardlink -cv Docs/ Licenses/
 
+%check
+TESTDIRS="AMD CAMD CCOLAMD CHOLMOD COLAMD KLU LDL SPQR RBio UMFPACK"
+%if "%{?enable_csparse}" == "1"
+TESTDIRS="$TESTDIRS CSparse"
+%else
+TESTDIRS="$TESTDIRS CXSparse"
+%endif
+for d in $TESTDIRS ; do
+    make -C $d/Demo CFLAGS="$RPM_OPT_FLAGS" LAPACK="" SPQR_CONFIG=-DHAVE_TBB TBB=-ltbb
+done
+
 %post -p /sbin/ldconfig
 
 %postun -p /sbin/ldconfig
@@ -426,6 +437,7 @@ hardlink -cv Docs/ Licenses/
 - use openblas instead of atlas (#1506933)
 - enable parallel make for faster builds and drop duplicate -fPIC
 - drop non-standard -O3 and duplicate -fexceptions from default CFLAGS
+- build and run demos in check section
 
 * Sat Jul 14 2018 Fedora Release Engineering <releng@fedoraproject.org> - 4.4.6-13
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild