Can you “un-precious” a configure variable (inverse of AC_ARG_VAR)?
问题 The AC_ARG_VAR macro declares a variable precious which has certain cache-checking implications. Some configure macros declare certain variables precious, and I would like to undo that. For example, AC_PROG_CC will declare CFLAGS as precious, and I need to make it non-precious. Motivation Doing this would allow me to modify CFLAGS in a top-level configure and allow sub-package configures to execute without clashing with cached CFLAGS value. See this question for more background. 回答1: AC_DEFUN