but for get_compiler_info, line must start with 'set'.
#if defined (__xlc__)
/* IBM'x xlc compiler. NOTE: __xlc__ expands to a double quoted string of four
numbers seperated by '.'s: currently "7.0.0.0" */
-regsub -all {\.} [join {xlc __xlc__} -] - compiler_info
+set need_a_set [regsub -all {\.} [join {xlc __xlc__} -] - compiler_info]
#endif
#if defined (__xlc__)
/* IBM'x xlc compiler. NOTE: __xlc__ expands to a double quoted string of four
numbers seperated by '.'s: currently "7.0.0.0" */
-regsub -all {\.} [join {xlc __xlc__} -] - compiler_info
+set need_a_set [regsub -all {\.} [join {xlc __xlc__} -] - compiler_info]
#endif