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7.4.3 Cache Checkpointing
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.
-- Macro: AC_CACHE_LOAD
Loads values from existing cache file, or creates a new cache file
if a cache file is not found. Called automatically from `AC_INIT'.
-- Macro: AC_CACHE_SAVE
Flushes all cached values to the cache file. Called automatically
from `AC_OUTPUT', but it can be quite useful to call
`AC_CACHE_SAVE' at key points in `configure.ac'.
... AC_INIT, etc. ...
# Checks for programs.
... more program checks ...
# Checks for libraries.
... more lib checks ...
# 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. ...
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