If your configure script, or a macro called from configure.ac, happens
to abort the configure process, it may be useful to checkpoint the cache
a few times at key points using
AC_CACHE_SAVE. Doing so
reduces the amount of time it takes to rerun the configure script with
(hopefully) the error that caused the previous abort corrected.
... AC_INIT, etc. ... # Checks for programs. AC_PROG_CC AC_PROG_AWK ... more program checks ... AC_CACHE_SAVE # Checks for libraries. AC_CHECK_LIB([nsl], [gethostbyname]) AC_CHECK_LIB([socket], [connect]) ... more lib checks ... AC_CACHE_SAVE # Might abort... AM_PATH_GTK([1.0.2], , [AC_MSG_ERROR([GTK not in path])]) AM_PATH_GTKMM([0.9.5], , [AC_MSG_ERROR([GTK not in path])]) ... AC_OUTPUT, etc. ...