Install miniapp content w/ GNU make

makefile

@@ -611,6 +611,15 @@ install: $(if $(static),$(BLD)libmfem.a) $(if $(shared),$(BLD)libmfem.$(SO_EXT))
 # install static and/or shared library
 	$(if $(static),$(INSTALLDEF) $(BLD)libmfem.a $(PREFIX_LIB))
 	$(if $(shared),$(INSTALL_SHARED_LIB))
+# install miniapps common libs
+	if ls $(BLD)miniapps/common/libmfem-common.* > /dev/null 2>&1; then \
+	   $(MKINSTALLDIR) $(PREFIX_LIB)/mfem/miniapps/common \
+	   $(if $(static),$(INSTALLDEF) $(BLD)miniapps/common/libmfem-common.a \
+	      $(PREFIX_LIB)/mfem/miniapps/common) \
+	   $(if $(shared),$(INSTALLDEF) $(BLD)miniapps/common/libmfem-common.$(SO_VER) \
+	      $(PREFIX_LIB)/mfem/miniapps/common && \
+	      ln -sf libmfem.$(SO_VER) $(PREFIX_LIB)/mfem/miniapps/common/libmfem.$(SO_EXT)) \
+	fi
 # install top level includes
 	$(MKINSTALLDIR) $(PREFIX_INC)/mfem
 	$(INSTALLDEF) $(SRC)mfem.hpp $(SRC)mfem-performance.hpp \
@@ -629,6 +638,11 @@ install: $(if $(static),$(BLD)libmfem.a) $(if $(shared),$(BLD)libmfem.$(SO_EXT))
 	   ( $(MKINSTALLDIR) $(PREFIX_INC)/mfem/$$dir ) && \
 	   $(INSTALLDEF) $(SRC)$$dir/*.hpp $(PREFIX_INC)/mfem/$$dir; \
 	done
+# install miniapps common headers
+	if ls $(BLD)miniapps/common/libmfem-common.* > /dev/null 2>&1; then \
+	   $(MKINSTALLDIR) $(PREFIX_INC)/mfem/miniapps/common \
+	   $(INSTALLDEF) $(SRC)miniapps/common/*.hpp $(PREFIX_INC)/mfem/miniapps/common \
+	fi
 # install *.okl files
 	for dir in $(OKL_DIRS); do \
 	   ( $(MKINSTALLDIR) $(PREFIX_INC)/mfem/$$dir ) && \