adding backend-specific env variables to setenv script

Author: alberto-scolari

src/setenv.in

@@ -14,13 +14,20 @@
 # limitations under the License.
 #
 
-DEPDIR="@CMAKE_INSTALL_PREFIX@"
+if [[ "${ALP_SETENV}" != "1" ]]; then
 
-LD_LIBRARY_PATH=${DEPDIR}/lib/:${DEPDIR}/lib64/:${LD_LIBRARY_PATH}
-LIBRARY_PATH=${DEPDIR}/lib/:${DEPDIR}/lib64/:${LIBRARY_PATH}
-export PATH=${DEPDIR}/bin:${PATH}
-unset DEPDIR
+	export ALP_SETENV="1"
 
-export LPFRUN="@LPFRUN_CMD_SPACED@"
-export MANUALRUN="@MANUALRUN_SPACED@"
-export BACKENDS=(@AVAILABLE_BACKENDS_SPACED@)
+	DEPDIR="@CMAKE_INSTALL_PREFIX@"
+	@BACKEND_DIR_LIST@
+
+	LD_LIBRARY_PATH=${DEPDIR}/lib/:${LD_LIBRARY_PATH}
+	LIBRARY_PATH=${DEPDIR}/lib/:${LIBRARY_PATH}
+	export PATH=${DEPDIR}/bin:${PATH}
+	unset DEPDIR
+
+	export LPFRUN="@LPFRUN_CMD_SPACED@"
+	export MANUALRUN="@MANUALRUN_SPACED@"
+	export BACKENDS=(@AVAILABLE_BACKENDS_SPACED@)
+
+fi