Merge branch '256-build-system-result-of-envsubst-must-be-quoted' into 'master'

Resolve "build-system: result of envsubst must be quoted"

Closes #256

See merge request Pmodules/src!233

CHANGELOG.md

@@ -15,8 +15,8 @@
 * Option '--clean-install' added. If this option is set, the 
   module is removed before building, if the module already
   exist. (issue #247)
-* Required patches can now be defined in the YAML configuration
-  file (issue #249)
+* Arguments to CMake/autotools and required patches can now
+  be defined in the YAML configuration file (issues #249, #256)
 * Check added whether all required group dependencies are
   specified and also not more than required. (issue #251)
 * The number of directory components to be removed while

Pmodules/libpbuild.bash

@@ -782,7 +782,7 @@ pbuild::configure() {
 	local -a config_args=()
 	local -- arg=''
 	for arg in "${CONFIGURE_ARGS[@]}"; do
-		config_args+=( $(envsubst <<<"${arg}") )
+		config_args+=( "$(envsubst <<<"${arg}")" )
 	done
 	if [[ -r "${SRC_DIR}/configure" ]] && \
 		   [[ "${configure_with}" == 'auto' ]] || \