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5.3 Files

You might also need to check for the existence of files. Before using these macros, ask yourself whether a runtime test might not be a better solution. Be aware that, like most Autoconf macros, they test a feature of the host machine, and therefore, they die when cross-compiling.

Macro: AC_CHECK_FILE (file, [action-if-found] [action-if-not-found]

Check whether file file exists on the native system. If it is found, execute action-if-found, otherwise do action-if-not-found, if given. The result of this test is cached in the ac_cv_file_file variable, with characters not suitable for a variable name mapped to underscores.

Macro: AC_CHECK_FILES (files, [action-if-found] [action-if-not-found]

Executes AC_CHECK_FILE once for each file listed in files. Additionally, defines ‘HAVE_file’ (see section Standard Symbols) for each file found. The results of each test are cached in the ac_cv_file_file variable, with characters not suitable for a variable name mapped to underscores.


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