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